1792 lines
46 KiB
C
1792 lines
46 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* bq2415x charger driver
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*
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* Copyright (C) 2011-2013 Pali Rohár <pali@kernel.org>
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*
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* Datasheets:
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* https://www.ti.com/product/bq24150
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* https://www.ti.com/product/bq24150a
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* https://www.ti.com/product/bq24152
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* https://www.ti.com/product/bq24153
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* https://www.ti.com/product/bq24153a
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* https://www.ti.com/product/bq24155
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* https://www.ti.com/product/bq24157s
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* https://www.ti.com/product/bq24158
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/param.h>
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#include <linux/err.h>
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#include <linux/workqueue.h>
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#include <linux/sysfs.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/idr.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/power/bq2415x_charger.h>
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/* timeout for resetting chip timer */
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#define BQ2415X_TIMER_TIMEOUT 10
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#define BQ2415X_REG_STATUS 0x00
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#define BQ2415X_REG_CONTROL 0x01
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#define BQ2415X_REG_VOLTAGE 0x02
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#define BQ2415X_REG_VENDER 0x03
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#define BQ2415X_REG_CURRENT 0x04
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/* reset state for all registers */
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#define BQ2415X_RESET_STATUS BIT(6)
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#define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5))
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#define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3))
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#define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7))
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/* status register */
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#define BQ2415X_BIT_TMR_RST 7
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#define BQ2415X_BIT_OTG 7
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#define BQ2415X_BIT_EN_STAT 6
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#define BQ2415X_MASK_STAT (BIT(4)|BIT(5))
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#define BQ2415X_SHIFT_STAT 4
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#define BQ2415X_BIT_BOOST 3
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#define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2))
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#define BQ2415X_SHIFT_FAULT 0
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/* control register */
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#define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7))
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#define BQ2415X_SHIFT_LIMIT 6
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#define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5))
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#define BQ2415X_SHIFT_VLOWV 4
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#define BQ2415X_BIT_TE 3
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#define BQ2415X_BIT_CE 2
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#define BQ2415X_BIT_HZ_MODE 1
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#define BQ2415X_BIT_OPA_MODE 0
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/* voltage register */
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#define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
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#define BQ2415X_SHIFT_VO 2
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#define BQ2415X_BIT_OTG_PL 1
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#define BQ2415X_BIT_OTG_EN 0
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/* vender register */
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#define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7))
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#define BQ2415X_SHIFT_VENDER 5
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#define BQ2415X_MASK_PN (BIT(3)|BIT(4))
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#define BQ2415X_SHIFT_PN 3
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#define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2))
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#define BQ2415X_SHIFT_REVISION 0
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/* current register */
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#define BQ2415X_MASK_RESET BIT(7)
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#define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6))
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#define BQ2415X_SHIFT_VI_CHRG 4
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/* N/A BIT(3) */
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#define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2))
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#define BQ2415X_SHIFT_VI_TERM 0
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enum bq2415x_command {
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BQ2415X_TIMER_RESET,
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BQ2415X_OTG_STATUS,
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BQ2415X_STAT_PIN_STATUS,
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BQ2415X_STAT_PIN_ENABLE,
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BQ2415X_STAT_PIN_DISABLE,
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BQ2415X_CHARGE_STATUS,
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BQ2415X_BOOST_STATUS,
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BQ2415X_FAULT_STATUS,
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BQ2415X_CHARGE_TERMINATION_STATUS,
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BQ2415X_CHARGE_TERMINATION_ENABLE,
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BQ2415X_CHARGE_TERMINATION_DISABLE,
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BQ2415X_CHARGER_STATUS,
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BQ2415X_CHARGER_ENABLE,
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BQ2415X_CHARGER_DISABLE,
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BQ2415X_HIGH_IMPEDANCE_STATUS,
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BQ2415X_HIGH_IMPEDANCE_ENABLE,
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BQ2415X_HIGH_IMPEDANCE_DISABLE,
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BQ2415X_BOOST_MODE_STATUS,
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BQ2415X_BOOST_MODE_ENABLE,
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BQ2415X_BOOST_MODE_DISABLE,
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BQ2415X_OTG_LEVEL,
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BQ2415X_OTG_ACTIVATE_HIGH,
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BQ2415X_OTG_ACTIVATE_LOW,
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BQ2415X_OTG_PIN_STATUS,
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BQ2415X_OTG_PIN_ENABLE,
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BQ2415X_OTG_PIN_DISABLE,
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BQ2415X_VENDER_CODE,
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BQ2415X_PART_NUMBER,
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BQ2415X_REVISION,
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};
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enum bq2415x_chip {
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BQUNKNOWN,
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BQ24150,
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BQ24150A,
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BQ24151,
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BQ24151A,
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BQ24152,
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BQ24153,
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BQ24153A,
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BQ24155,
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BQ24156,
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BQ24156A,
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BQ24157S,
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BQ24158,
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};
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static char *bq2415x_chip_name[] = {
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"unknown",
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"bq24150",
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"bq24150a",
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"bq24151",
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"bq24151a",
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"bq24152",
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"bq24153",
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"bq24153a",
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"bq24155",
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"bq24156",
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"bq24156a",
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"bq24157s",
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"bq24158",
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};
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struct bq2415x_device {
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struct device *dev;
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struct bq2415x_platform_data init_data;
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struct power_supply *charger;
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struct power_supply_desc charger_desc;
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struct delayed_work work;
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struct device_node *notify_node;
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struct notifier_block nb;
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enum bq2415x_mode reported_mode;/* mode reported by hook function */
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enum bq2415x_mode mode; /* currently configured mode */
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enum bq2415x_chip chip;
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const char *timer_error;
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char *model;
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char *name;
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int autotimer; /* 1 - if driver automatically reset timer, 0 - not */
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int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */
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int id;
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};
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/* each registered chip must have unique id */
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static DEFINE_IDR(bq2415x_id);
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static DEFINE_MUTEX(bq2415x_id_mutex);
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static DEFINE_MUTEX(bq2415x_timer_mutex);
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static DEFINE_MUTEX(bq2415x_i2c_mutex);
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/**** i2c read functions ****/
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/* read value from register */
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static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
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{
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struct i2c_client *client = to_i2c_client(bq->dev);
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struct i2c_msg msg[2];
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u8 val;
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int ret;
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if (!client->adapter)
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return -ENODEV;
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msg[0].addr = client->addr;
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msg[0].flags = 0;
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msg[0].buf = ®
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msg[0].len = sizeof(reg);
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msg[1].addr = client->addr;
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msg[1].flags = I2C_M_RD;
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msg[1].buf = &val;
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msg[1].len = sizeof(val);
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mutex_lock(&bq2415x_i2c_mutex);
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
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mutex_unlock(&bq2415x_i2c_mutex);
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if (ret < 0)
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return ret;
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return val;
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}
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/* read value from register, apply mask and right shift it */
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static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
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u8 mask, u8 shift)
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{
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int ret;
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if (shift > 8)
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return -EINVAL;
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ret = bq2415x_i2c_read(bq, reg);
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if (ret < 0)
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return ret;
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return (ret & mask) >> shift;
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}
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/* read value from register and return one specified bit */
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static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
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{
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if (bit > 8)
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return -EINVAL;
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return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
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}
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/**** i2c write functions ****/
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/* write value to register */
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static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
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{
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struct i2c_client *client = to_i2c_client(bq->dev);
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struct i2c_msg msg[1];
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u8 data[2];
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int ret;
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data[0] = reg;
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data[1] = val;
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msg[0].addr = client->addr;
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msg[0].flags = 0;
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msg[0].buf = data;
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msg[0].len = ARRAY_SIZE(data);
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mutex_lock(&bq2415x_i2c_mutex);
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
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mutex_unlock(&bq2415x_i2c_mutex);
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/* i2c_transfer returns number of messages transferred */
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if (ret < 0)
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return ret;
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else if (ret != 1)
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return -EIO;
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return 0;
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}
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/* read value from register, change it with mask left shifted and write back */
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static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
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u8 mask, u8 shift)
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{
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int ret;
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if (shift > 8)
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return -EINVAL;
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ret = bq2415x_i2c_read(bq, reg);
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if (ret < 0)
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return ret;
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ret &= ~mask;
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ret |= val << shift;
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return bq2415x_i2c_write(bq, reg, ret);
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}
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/* change only one bit in register */
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static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
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bool val, u8 bit)
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{
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if (bit > 8)
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return -EINVAL;
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return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
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}
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/**** global functions ****/
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/* exec command function */
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static int bq2415x_exec_command(struct bq2415x_device *bq,
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enum bq2415x_command command)
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{
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int ret;
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switch (command) {
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case BQ2415X_TIMER_RESET:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
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1, BQ2415X_BIT_TMR_RST);
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case BQ2415X_OTG_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
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BQ2415X_BIT_OTG);
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case BQ2415X_STAT_PIN_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
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BQ2415X_BIT_EN_STAT);
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case BQ2415X_STAT_PIN_ENABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
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BQ2415X_BIT_EN_STAT);
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case BQ2415X_STAT_PIN_DISABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
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BQ2415X_BIT_EN_STAT);
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case BQ2415X_CHARGE_STATUS:
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
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BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
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case BQ2415X_BOOST_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
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BQ2415X_BIT_BOOST);
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case BQ2415X_FAULT_STATUS:
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
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BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
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case BQ2415X_CHARGE_TERMINATION_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
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BQ2415X_BIT_TE);
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case BQ2415X_CHARGE_TERMINATION_ENABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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1, BQ2415X_BIT_TE);
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case BQ2415X_CHARGE_TERMINATION_DISABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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0, BQ2415X_BIT_TE);
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case BQ2415X_CHARGER_STATUS:
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ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
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BQ2415X_BIT_CE);
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if (ret < 0)
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return ret;
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return ret > 0 ? 0 : 1;
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case BQ2415X_CHARGER_ENABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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0, BQ2415X_BIT_CE);
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case BQ2415X_CHARGER_DISABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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1, BQ2415X_BIT_CE);
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case BQ2415X_HIGH_IMPEDANCE_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
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BQ2415X_BIT_HZ_MODE);
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case BQ2415X_HIGH_IMPEDANCE_ENABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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1, BQ2415X_BIT_HZ_MODE);
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case BQ2415X_HIGH_IMPEDANCE_DISABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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0, BQ2415X_BIT_HZ_MODE);
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case BQ2415X_BOOST_MODE_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
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BQ2415X_BIT_OPA_MODE);
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case BQ2415X_BOOST_MODE_ENABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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1, BQ2415X_BIT_OPA_MODE);
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case BQ2415X_BOOST_MODE_DISABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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0, BQ2415X_BIT_OPA_MODE);
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case BQ2415X_OTG_LEVEL:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
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BQ2415X_BIT_OTG_PL);
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case BQ2415X_OTG_ACTIVATE_HIGH:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
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1, BQ2415X_BIT_OTG_PL);
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case BQ2415X_OTG_ACTIVATE_LOW:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
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0, BQ2415X_BIT_OTG_PL);
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case BQ2415X_OTG_PIN_STATUS:
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
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BQ2415X_BIT_OTG_EN);
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case BQ2415X_OTG_PIN_ENABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
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1, BQ2415X_BIT_OTG_EN);
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case BQ2415X_OTG_PIN_DISABLE:
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
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0, BQ2415X_BIT_OTG_EN);
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case BQ2415X_VENDER_CODE:
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
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BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
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case BQ2415X_PART_NUMBER:
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
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BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
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case BQ2415X_REVISION:
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
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BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
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}
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return -EINVAL;
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}
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/* detect chip type */
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static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
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{
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struct i2c_client *client = to_i2c_client(bq->dev);
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int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
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if (ret < 0)
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return ret;
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switch (client->addr) {
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case 0x6b:
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switch (ret) {
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case 0:
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if (bq->chip == BQ24151A)
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return bq->chip;
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return BQ24151;
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case 1:
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if (bq->chip == BQ24150A ||
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bq->chip == BQ24152 ||
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bq->chip == BQ24155)
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return bq->chip;
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return BQ24150;
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case 2:
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if (bq->chip == BQ24153A)
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return bq->chip;
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return BQ24153;
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default:
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return BQUNKNOWN;
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}
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break;
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case 0x6a:
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switch (ret) {
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case 0:
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if (bq->chip == BQ24156A)
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return bq->chip;
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return BQ24156;
|
|
case 2:
|
|
if (bq->chip == BQ24157S)
|
|
return bq->chip;
|
|
return BQ24158;
|
|
default:
|
|
return BQUNKNOWN;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return BQUNKNOWN;
|
|
}
|
|
|
|
/* detect chip revision */
|
|
static int bq2415x_detect_revision(struct bq2415x_device *bq)
|
|
{
|
|
int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
|
|
int chip = bq2415x_detect_chip(bq);
|
|
|
|
if (ret < 0 || chip < 0)
|
|
return -1;
|
|
|
|
switch (chip) {
|
|
case BQ24150:
|
|
case BQ24150A:
|
|
case BQ24151:
|
|
case BQ24151A:
|
|
case BQ24152:
|
|
if (ret >= 0 && ret <= 3)
|
|
return ret;
|
|
return -1;
|
|
case BQ24153:
|
|
case BQ24153A:
|
|
case BQ24156:
|
|
case BQ24156A:
|
|
case BQ24157S:
|
|
case BQ24158:
|
|
if (ret == 3)
|
|
return 0;
|
|
else if (ret == 1)
|
|
return 1;
|
|
return -1;
|
|
case BQ24155:
|
|
if (ret == 3)
|
|
return 3;
|
|
return -1;
|
|
case BQUNKNOWN:
|
|
return -1;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* return chip vender code */
|
|
static int bq2415x_get_vender_code(struct bq2415x_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
|
|
if (ret < 0)
|
|
return 0;
|
|
|
|
/* convert to binary */
|
|
return (ret & 0x1) +
|
|
((ret >> 1) & 0x1) * 10 +
|
|
((ret >> 2) & 0x1) * 100;
|
|
}
|
|
|
|
/* reset all chip registers to default state */
|
|
static void bq2415x_reset_chip(struct bq2415x_device *bq)
|
|
{
|
|
bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
|
|
bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
|
|
bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
|
|
bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
|
|
bq->timer_error = NULL;
|
|
}
|
|
|
|
/**** properties functions ****/
|
|
|
|
/* set current limit in mA */
|
|
static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
|
|
{
|
|
int val;
|
|
|
|
if (mA <= 100)
|
|
val = 0;
|
|
else if (mA <= 500)
|
|
val = 1;
|
|
else if (mA <= 800)
|
|
val = 2;
|
|
else
|
|
val = 3;
|
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
|
|
BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
|
|
}
|
|
|
|
/* get current limit in mA */
|
|
static int bq2415x_get_current_limit(struct bq2415x_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
|
|
BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
|
|
if (ret < 0)
|
|
return ret;
|
|
else if (ret == 0)
|
|
return 100;
|
|
else if (ret == 1)
|
|
return 500;
|
|
else if (ret == 2)
|
|
return 800;
|
|
else if (ret == 3)
|
|
return 1800;
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* set weak battery voltage in mV */
|
|
static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
|
|
{
|
|
int val;
|
|
|
|
/* round to 100mV */
|
|
if (mV <= 3400 + 50)
|
|
val = 0;
|
|
else if (mV <= 3500 + 50)
|
|
val = 1;
|
|
else if (mV <= 3600 + 50)
|
|
val = 2;
|
|
else
|
|
val = 3;
|
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
|
|
BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
|
|
}
|
|
|
|
/* get weak battery voltage in mV */
|
|
static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
|
|
BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
|
|
if (ret < 0)
|
|
return ret;
|
|
return 100 * (34 + ret);
|
|
}
|
|
|
|
/* set battery regulation voltage in mV */
|
|
static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
|
|
int mV)
|
|
{
|
|
int val = (mV/10 - 350) / 2;
|
|
|
|
/*
|
|
* According to datasheet, maximum battery regulation voltage is
|
|
* 4440mV which is b101111 = 47.
|
|
*/
|
|
if (val < 0)
|
|
val = 0;
|
|
else if (val > 47)
|
|
return -EINVAL;
|
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
|
|
BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
|
|
}
|
|
|
|
/* get battery regulation voltage in mV */
|
|
static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
|
|
{
|
|
int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
|
|
BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
return 10 * (350 + 2*ret);
|
|
}
|
|
|
|
/* set charge current in mA (platform data must provide resistor sense) */
|
|
static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
|
|
{
|
|
int val;
|
|
|
|
if (bq->init_data.resistor_sense <= 0)
|
|
return -EINVAL;
|
|
|
|
val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
|
|
if (val < 0)
|
|
val = 0;
|
|
else if (val > 7)
|
|
val = 7;
|
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
|
|
BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET,
|
|
BQ2415X_SHIFT_VI_CHRG);
|
|
}
|
|
|
|
/* get charge current in mA (platform data must provide resistor sense) */
|
|
static int bq2415x_get_charge_current(struct bq2415x_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
if (bq->init_data.resistor_sense <= 0)
|
|
return -EINVAL;
|
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
|
|
BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
|
|
if (ret < 0)
|
|
return ret;
|
|
return (37400 + 6800*ret) / bq->init_data.resistor_sense;
|
|
}
|
|
|
|
/* set termination current in mA (platform data must provide resistor sense) */
|
|
static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
|
|
{
|
|
int val;
|
|
|
|
if (bq->init_data.resistor_sense <= 0)
|
|
return -EINVAL;
|
|
|
|
val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
|
|
if (val < 0)
|
|
val = 0;
|
|
else if (val > 7)
|
|
val = 7;
|
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
|
|
BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET,
|
|
BQ2415X_SHIFT_VI_TERM);
|
|
}
|
|
|
|
/* get termination current in mA (platform data must provide resistor sense) */
|
|
static int bq2415x_get_termination_current(struct bq2415x_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
if (bq->init_data.resistor_sense <= 0)
|
|
return -EINVAL;
|
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
|
|
BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
|
|
if (ret < 0)
|
|
return ret;
|
|
return (3400 + 3400*ret) / bq->init_data.resistor_sense;
|
|
}
|
|
|
|
/* set default value of property */
|
|
#define bq2415x_set_default_value(bq, prop) \
|
|
do { \
|
|
int ret = 0; \
|
|
if (bq->init_data.prop != -1) \
|
|
ret = bq2415x_set_##prop(bq, bq->init_data.prop); \
|
|
if (ret < 0) \
|
|
return ret; \
|
|
} while (0)
|
|
|
|
/* set default values of all properties */
|
|
static int bq2415x_set_defaults(struct bq2415x_device *bq)
|
|
{
|
|
bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
|
|
bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
|
|
bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE);
|
|
|
|
bq2415x_set_default_value(bq, current_limit);
|
|
bq2415x_set_default_value(bq, weak_battery_voltage);
|
|
bq2415x_set_default_value(bq, battery_regulation_voltage);
|
|
|
|
if (bq->init_data.resistor_sense > 0) {
|
|
bq2415x_set_default_value(bq, charge_current);
|
|
bq2415x_set_default_value(bq, termination_current);
|
|
bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
|
|
}
|
|
|
|
bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
|
|
return 0;
|
|
}
|
|
|
|
/**** charger mode functions ****/
|
|
|
|
/* set charger mode */
|
|
static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
|
|
{
|
|
int ret = 0;
|
|
int charger = 0;
|
|
int boost = 0;
|
|
|
|
if (mode == BQ2415X_MODE_BOOST)
|
|
boost = 1;
|
|
else if (mode != BQ2415X_MODE_OFF)
|
|
charger = 1;
|
|
|
|
if (!charger)
|
|
ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
|
|
|
|
if (!boost)
|
|
ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (mode) {
|
|
case BQ2415X_MODE_OFF:
|
|
dev_dbg(bq->dev, "changing mode to: Offline\n");
|
|
ret = bq2415x_set_current_limit(bq, 100);
|
|
break;
|
|
case BQ2415X_MODE_NONE:
|
|
dev_dbg(bq->dev, "changing mode to: N/A\n");
|
|
ret = bq2415x_set_current_limit(bq, 100);
|
|
break;
|
|
case BQ2415X_MODE_HOST_CHARGER:
|
|
dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n");
|
|
ret = bq2415x_set_current_limit(bq, 500);
|
|
break;
|
|
case BQ2415X_MODE_DEDICATED_CHARGER:
|
|
dev_dbg(bq->dev, "changing mode to: Dedicated charger\n");
|
|
ret = bq2415x_set_current_limit(bq, 1800);
|
|
break;
|
|
case BQ2415X_MODE_BOOST: /* Boost mode */
|
|
dev_dbg(bq->dev, "changing mode to: Boost\n");
|
|
ret = bq2415x_set_current_limit(bq, 100);
|
|
break;
|
|
}
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (charger)
|
|
ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
|
|
else if (boost)
|
|
ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
bq2415x_set_default_value(bq, weak_battery_voltage);
|
|
bq2415x_set_default_value(bq, battery_regulation_voltage);
|
|
|
|
bq->mode = mode;
|
|
sysfs_notify(&bq->charger->dev.kobj, NULL, "mode");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static bool bq2415x_update_reported_mode(struct bq2415x_device *bq, int mA)
|
|
{
|
|
enum bq2415x_mode mode;
|
|
|
|
if (mA == 0)
|
|
mode = BQ2415X_MODE_OFF;
|
|
else if (mA < 500)
|
|
mode = BQ2415X_MODE_NONE;
|
|
else if (mA < 1800)
|
|
mode = BQ2415X_MODE_HOST_CHARGER;
|
|
else
|
|
mode = BQ2415X_MODE_DEDICATED_CHARGER;
|
|
|
|
if (bq->reported_mode == mode)
|
|
return false;
|
|
|
|
bq->reported_mode = mode;
|
|
return true;
|
|
}
|
|
|
|
static int bq2415x_notifier_call(struct notifier_block *nb,
|
|
unsigned long val, void *v)
|
|
{
|
|
struct bq2415x_device *bq =
|
|
container_of(nb, struct bq2415x_device, nb);
|
|
struct power_supply *psy = v;
|
|
union power_supply_propval prop;
|
|
int ret;
|
|
|
|
if (val != PSY_EVENT_PROP_CHANGED)
|
|
return NOTIFY_OK;
|
|
|
|
/* Ignore event if it was not send by notify_node/notify_device */
|
|
if (bq->notify_node) {
|
|
if (!psy->dev.parent ||
|
|
psy->dev.parent->of_node != bq->notify_node)
|
|
return NOTIFY_OK;
|
|
} else if (bq->init_data.notify_device) {
|
|
if (strcmp(psy->desc->name, bq->init_data.notify_device) != 0)
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
dev_dbg(bq->dev, "notifier call was called\n");
|
|
|
|
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX,
|
|
&prop);
|
|
if (ret != 0)
|
|
return NOTIFY_OK;
|
|
|
|
if (!bq2415x_update_reported_mode(bq, prop.intval))
|
|
return NOTIFY_OK;
|
|
|
|
/* if automode is not enabled do not tell about reported_mode */
|
|
if (bq->automode < 1)
|
|
return NOTIFY_OK;
|
|
|
|
schedule_delayed_work(&bq->work, 0);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
/**** timer functions ****/
|
|
|
|
/* enable/disable auto resetting chip timer */
|
|
static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
|
|
{
|
|
mutex_lock(&bq2415x_timer_mutex);
|
|
|
|
if (bq->autotimer == state) {
|
|
mutex_unlock(&bq2415x_timer_mutex);
|
|
return;
|
|
}
|
|
|
|
bq->autotimer = state;
|
|
|
|
if (state) {
|
|
schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
|
|
bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
|
|
bq->timer_error = NULL;
|
|
} else {
|
|
cancel_delayed_work_sync(&bq->work);
|
|
}
|
|
|
|
mutex_unlock(&bq2415x_timer_mutex);
|
|
}
|
|
|
|
/* called by bq2415x_timer_work on timer error */
|
|
static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
|
|
{
|
|
bq->timer_error = msg;
|
|
sysfs_notify(&bq->charger->dev.kobj, NULL, "timer");
|
|
dev_err(bq->dev, "%s\n", msg);
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
bq2415x_set_mode(bq, BQ2415X_MODE_OFF);
|
|
bq2415x_set_autotimer(bq, 0);
|
|
}
|
|
|
|
/* delayed work function for auto resetting chip timer */
|
|
static void bq2415x_timer_work(struct work_struct *work)
|
|
{
|
|
struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
|
|
work.work);
|
|
int ret;
|
|
int error;
|
|
int boost;
|
|
|
|
if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
|
|
sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
|
|
bq2415x_set_mode(bq, bq->reported_mode);
|
|
}
|
|
|
|
if (!bq->autotimer)
|
|
return;
|
|
|
|
ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
|
|
if (ret < 0) {
|
|
bq2415x_timer_error(bq, "Resetting timer failed");
|
|
return;
|
|
}
|
|
|
|
boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
|
|
if (boost < 0) {
|
|
bq2415x_timer_error(bq, "Unknown error");
|
|
return;
|
|
}
|
|
|
|
error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
|
|
if (error < 0) {
|
|
bq2415x_timer_error(bq, "Unknown error");
|
|
return;
|
|
}
|
|
|
|
if (boost) {
|
|
switch (error) {
|
|
/* Non fatal errors, chip is OK */
|
|
case 0: /* No error */
|
|
break;
|
|
case 6: /* Timer expired */
|
|
dev_err(bq->dev, "Timer expired\n");
|
|
break;
|
|
case 3: /* Battery voltage too low */
|
|
dev_err(bq->dev, "Battery voltage to low\n");
|
|
break;
|
|
|
|
/* Fatal errors, disable and reset chip */
|
|
case 1: /* Overvoltage protection (chip fried) */
|
|
bq2415x_timer_error(bq,
|
|
"Overvoltage protection (chip fried)");
|
|
return;
|
|
case 2: /* Overload */
|
|
bq2415x_timer_error(bq, "Overload");
|
|
return;
|
|
case 4: /* Battery overvoltage protection */
|
|
bq2415x_timer_error(bq,
|
|
"Battery overvoltage protection");
|
|
return;
|
|
case 5: /* Thermal shutdown (too hot) */
|
|
bq2415x_timer_error(bq,
|
|
"Thermal shutdown (too hot)");
|
|
return;
|
|
case 7: /* N/A */
|
|
bq2415x_timer_error(bq, "Unknown error");
|
|
return;
|
|
}
|
|
} else {
|
|
switch (error) {
|
|
/* Non fatal errors, chip is OK */
|
|
case 0: /* No error */
|
|
break;
|
|
case 2: /* Sleep mode */
|
|
dev_err(bq->dev, "Sleep mode\n");
|
|
break;
|
|
case 3: /* Poor input source */
|
|
dev_err(bq->dev, "Poor input source\n");
|
|
break;
|
|
case 6: /* Timer expired */
|
|
dev_err(bq->dev, "Timer expired\n");
|
|
break;
|
|
case 7: /* No battery */
|
|
dev_err(bq->dev, "No battery\n");
|
|
break;
|
|
|
|
/* Fatal errors, disable and reset chip */
|
|
case 1: /* Overvoltage protection (chip fried) */
|
|
bq2415x_timer_error(bq,
|
|
"Overvoltage protection (chip fried)");
|
|
return;
|
|
case 4: /* Battery overvoltage protection */
|
|
bq2415x_timer_error(bq,
|
|
"Battery overvoltage protection");
|
|
return;
|
|
case 5: /* Thermal shutdown (too hot) */
|
|
bq2415x_timer_error(bq,
|
|
"Thermal shutdown (too hot)");
|
|
return;
|
|
}
|
|
}
|
|
|
|
schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
|
|
}
|
|
|
|
/**** power supply interface code ****/
|
|
|
|
static enum power_supply_property bq2415x_power_supply_props[] = {
|
|
/* TODO: maybe add more power supply properties */
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_MODEL_NAME,
|
|
};
|
|
|
|
static int bq2415x_power_supply_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
int ret;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
|
|
if (ret < 0)
|
|
return ret;
|
|
else if (ret == 0) /* Ready */
|
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
else if (ret == 1) /* Charge in progress */
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
else if (ret == 2) /* Charge done */
|
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
|
else
|
|
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
break;
|
|
case POWER_SUPPLY_PROP_MODEL_NAME:
|
|
val->strval = bq->model;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
|
|
{
|
|
bq->autotimer = 0;
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
cancel_delayed_work_sync(&bq->work);
|
|
power_supply_unregister(bq->charger);
|
|
kfree(bq->model);
|
|
}
|
|
|
|
/**** additional sysfs entries for power supply interface ****/
|
|
|
|
/* show *_status entries */
|
|
static ssize_t bq2415x_sysfs_show_status(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
enum bq2415x_command command;
|
|
int ret;
|
|
|
|
if (strcmp(attr->attr.name, "otg_status") == 0)
|
|
command = BQ2415X_OTG_STATUS;
|
|
else if (strcmp(attr->attr.name, "charge_status") == 0)
|
|
command = BQ2415X_CHARGE_STATUS;
|
|
else if (strcmp(attr->attr.name, "boost_status") == 0)
|
|
command = BQ2415X_BOOST_STATUS;
|
|
else if (strcmp(attr->attr.name, "fault_status") == 0)
|
|
command = BQ2415X_FAULT_STATUS;
|
|
else
|
|
return -EINVAL;
|
|
|
|
ret = bq2415x_exec_command(bq, command);
|
|
if (ret < 0)
|
|
return ret;
|
|
return sprintf(buf, "%d\n", ret);
|
|
}
|
|
|
|
/*
|
|
* set timer entry:
|
|
* auto - enable auto mode
|
|
* off - disable auto mode
|
|
* (other values) - reset chip timer
|
|
*/
|
|
static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
int ret = 0;
|
|
|
|
if (strncmp(buf, "auto", 4) == 0)
|
|
bq2415x_set_autotimer(bq, 1);
|
|
else if (strncmp(buf, "off", 3) == 0)
|
|
bq2415x_set_autotimer(bq, 0);
|
|
else
|
|
ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
|
|
/* show timer entry (auto or off) */
|
|
static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
|
|
if (bq->timer_error)
|
|
return sprintf(buf, "%s\n", bq->timer_error);
|
|
|
|
if (bq->autotimer)
|
|
return sprintf(buf, "auto\n");
|
|
return sprintf(buf, "off\n");
|
|
}
|
|
|
|
/*
|
|
* set mode entry:
|
|
* auto - if automode is supported, enable it and set mode to reported
|
|
* none - disable charger and boost mode
|
|
* host - charging mode for host/hub chargers (current limit 500mA)
|
|
* dedicated - charging mode for dedicated chargers (unlimited current limit)
|
|
* boost - disable charger and enable boost mode
|
|
*/
|
|
static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
enum bq2415x_mode mode;
|
|
int ret = 0;
|
|
|
|
if (strncmp(buf, "auto", 4) == 0) {
|
|
if (bq->automode < 0)
|
|
return -EINVAL;
|
|
bq->automode = 1;
|
|
mode = bq->reported_mode;
|
|
} else if (strncmp(buf, "off", 3) == 0) {
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
mode = BQ2415X_MODE_OFF;
|
|
} else if (strncmp(buf, "none", 4) == 0) {
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
mode = BQ2415X_MODE_NONE;
|
|
} else if (strncmp(buf, "host", 4) == 0) {
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
mode = BQ2415X_MODE_HOST_CHARGER;
|
|
} else if (strncmp(buf, "dedicated", 9) == 0) {
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
mode = BQ2415X_MODE_DEDICATED_CHARGER;
|
|
} else if (strncmp(buf, "boost", 5) == 0) {
|
|
if (bq->automode > 0)
|
|
bq->automode = 0;
|
|
mode = BQ2415X_MODE_BOOST;
|
|
} else if (strncmp(buf, "reset", 5) == 0) {
|
|
bq2415x_reset_chip(bq);
|
|
bq2415x_set_defaults(bq);
|
|
if (bq->automode <= 0)
|
|
return count;
|
|
bq->automode = 1;
|
|
mode = bq->reported_mode;
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = bq2415x_set_mode(bq, mode);
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
|
|
/* show mode entry (auto, none, host, dedicated or boost) */
|
|
static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
ssize_t ret = 0;
|
|
|
|
if (bq->automode > 0)
|
|
ret += sprintf(buf+ret, "auto (");
|
|
|
|
switch (bq->mode) {
|
|
case BQ2415X_MODE_OFF:
|
|
ret += sprintf(buf+ret, "off");
|
|
break;
|
|
case BQ2415X_MODE_NONE:
|
|
ret += sprintf(buf+ret, "none");
|
|
break;
|
|
case BQ2415X_MODE_HOST_CHARGER:
|
|
ret += sprintf(buf+ret, "host");
|
|
break;
|
|
case BQ2415X_MODE_DEDICATED_CHARGER:
|
|
ret += sprintf(buf+ret, "dedicated");
|
|
break;
|
|
case BQ2415X_MODE_BOOST:
|
|
ret += sprintf(buf+ret, "boost");
|
|
break;
|
|
}
|
|
|
|
if (bq->automode > 0)
|
|
ret += sprintf(buf+ret, ")");
|
|
|
|
ret += sprintf(buf+ret, "\n");
|
|
return ret;
|
|
}
|
|
|
|
/* show reported_mode entry (none, host, dedicated or boost) */
|
|
static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
|
|
if (bq->automode < 0)
|
|
return -EINVAL;
|
|
|
|
switch (bq->reported_mode) {
|
|
case BQ2415X_MODE_OFF:
|
|
return sprintf(buf, "off\n");
|
|
case BQ2415X_MODE_NONE:
|
|
return sprintf(buf, "none\n");
|
|
case BQ2415X_MODE_HOST_CHARGER:
|
|
return sprintf(buf, "host\n");
|
|
case BQ2415X_MODE_DEDICATED_CHARGER:
|
|
return sprintf(buf, "dedicated\n");
|
|
case BQ2415X_MODE_BOOST:
|
|
return sprintf(buf, "boost\n");
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* directly set raw value to chip register, format: 'register value' */
|
|
static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
ssize_t ret = 0;
|
|
unsigned int reg;
|
|
unsigned int val;
|
|
|
|
if (sscanf(buf, "%x %x", ®, &val) != 2)
|
|
return -EINVAL;
|
|
|
|
if (reg > 4 || val > 255)
|
|
return -EINVAL;
|
|
|
|
ret = bq2415x_i2c_write(bq, reg, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
|
|
/* print value of chip register, format: 'register=value' */
|
|
static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
|
|
u8 reg,
|
|
char *buf)
|
|
{
|
|
int ret = bq2415x_i2c_read(bq, reg);
|
|
|
|
if (ret < 0)
|
|
return sprintf(buf, "%#.2x=error %d\n", reg, ret);
|
|
return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
|
|
}
|
|
|
|
/* show all raw values of chip register, format per line: 'register=value' */
|
|
static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
ssize_t ret = 0;
|
|
|
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
|
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
|
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
|
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
|
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
|
|
return ret;
|
|
}
|
|
|
|
/* set current and voltage limit entries (in mA or mV) */
|
|
static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
long val;
|
|
int ret;
|
|
|
|
if (kstrtol(buf, 10, &val) < 0)
|
|
return -EINVAL;
|
|
|
|
if (strcmp(attr->attr.name, "current_limit") == 0)
|
|
ret = bq2415x_set_current_limit(bq, val);
|
|
else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
|
|
ret = bq2415x_set_weak_battery_voltage(bq, val);
|
|
else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
|
|
ret = bq2415x_set_battery_regulation_voltage(bq, val);
|
|
else if (strcmp(attr->attr.name, "charge_current") == 0)
|
|
ret = bq2415x_set_charge_current(bq, val);
|
|
else if (strcmp(attr->attr.name, "termination_current") == 0)
|
|
ret = bq2415x_set_termination_current(bq, val);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
|
|
/* show current and voltage limit entries (in mA or mV) */
|
|
static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
int ret;
|
|
|
|
if (strcmp(attr->attr.name, "current_limit") == 0)
|
|
ret = bq2415x_get_current_limit(bq);
|
|
else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
|
|
ret = bq2415x_get_weak_battery_voltage(bq);
|
|
else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
|
|
ret = bq2415x_get_battery_regulation_voltage(bq);
|
|
else if (strcmp(attr->attr.name, "charge_current") == 0)
|
|
ret = bq2415x_get_charge_current(bq);
|
|
else if (strcmp(attr->attr.name, "termination_current") == 0)
|
|
ret = bq2415x_get_termination_current(bq);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
return sprintf(buf, "%d\n", ret);
|
|
}
|
|
|
|
/* set *_enable entries */
|
|
static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
enum bq2415x_command command;
|
|
long val;
|
|
int ret;
|
|
|
|
if (kstrtol(buf, 10, &val) < 0)
|
|
return -EINVAL;
|
|
|
|
if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
|
|
command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
|
|
BQ2415X_CHARGE_TERMINATION_DISABLE;
|
|
else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
|
|
command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
|
|
BQ2415X_HIGH_IMPEDANCE_DISABLE;
|
|
else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
|
|
command = val ? BQ2415X_OTG_PIN_ENABLE :
|
|
BQ2415X_OTG_PIN_DISABLE;
|
|
else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
|
|
command = val ? BQ2415X_STAT_PIN_ENABLE :
|
|
BQ2415X_STAT_PIN_DISABLE;
|
|
else
|
|
return -EINVAL;
|
|
|
|
ret = bq2415x_exec_command(bq, command);
|
|
if (ret < 0)
|
|
return ret;
|
|
return count;
|
|
}
|
|
|
|
/* show *_enable entries */
|
|
static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy);
|
|
enum bq2415x_command command;
|
|
int ret;
|
|
|
|
if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
|
|
command = BQ2415X_CHARGE_TERMINATION_STATUS;
|
|
else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
|
|
command = BQ2415X_HIGH_IMPEDANCE_STATUS;
|
|
else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
|
|
command = BQ2415X_OTG_PIN_STATUS;
|
|
else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
|
|
command = BQ2415X_STAT_PIN_STATUS;
|
|
else
|
|
return -EINVAL;
|
|
|
|
ret = bq2415x_exec_command(bq, command);
|
|
if (ret < 0)
|
|
return ret;
|
|
return sprintf(buf, "%d\n", ret);
|
|
}
|
|
|
|
static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
|
|
static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
|
|
static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
|
|
static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
|
|
static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
|
|
|
|
static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
|
|
static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
|
|
static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
|
|
static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
|
|
|
|
static DEVICE_ATTR(reported_mode, S_IRUGO,
|
|
bq2415x_sysfs_show_reported_mode, NULL);
|
|
static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
|
|
static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
|
|
|
|
static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
|
|
bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
|
|
|
|
static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
|
|
static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
|
|
static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
|
|
static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
|
|
|
|
static struct attribute *bq2415x_sysfs_attrs[] = {
|
|
/*
|
|
* TODO: some (appropriate) of these attrs should be switched to
|
|
* use power supply class props.
|
|
*/
|
|
&dev_attr_current_limit.attr,
|
|
&dev_attr_weak_battery_voltage.attr,
|
|
&dev_attr_battery_regulation_voltage.attr,
|
|
&dev_attr_charge_current.attr,
|
|
&dev_attr_termination_current.attr,
|
|
|
|
&dev_attr_charge_termination_enable.attr,
|
|
&dev_attr_high_impedance_enable.attr,
|
|
&dev_attr_otg_pin_enable.attr,
|
|
&dev_attr_stat_pin_enable.attr,
|
|
|
|
&dev_attr_reported_mode.attr,
|
|
&dev_attr_mode.attr,
|
|
&dev_attr_timer.attr,
|
|
|
|
&dev_attr_registers.attr,
|
|
|
|
&dev_attr_otg_status.attr,
|
|
&dev_attr_charge_status.attr,
|
|
&dev_attr_boost_status.attr,
|
|
&dev_attr_fault_status.attr,
|
|
NULL,
|
|
};
|
|
|
|
ATTRIBUTE_GROUPS(bq2415x_sysfs);
|
|
|
|
static int bq2415x_power_supply_init(struct bq2415x_device *bq)
|
|
{
|
|
int ret;
|
|
int chip;
|
|
char revstr[8];
|
|
struct power_supply_config psy_cfg = {
|
|
.drv_data = bq,
|
|
.of_node = bq->dev->of_node,
|
|
.attr_grp = bq2415x_sysfs_groups,
|
|
};
|
|
|
|
bq->charger_desc.name = bq->name;
|
|
bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
|
|
bq->charger_desc.properties = bq2415x_power_supply_props;
|
|
bq->charger_desc.num_properties =
|
|
ARRAY_SIZE(bq2415x_power_supply_props);
|
|
bq->charger_desc.get_property = bq2415x_power_supply_get_property;
|
|
|
|
ret = bq2415x_detect_chip(bq);
|
|
if (ret < 0)
|
|
chip = BQUNKNOWN;
|
|
else
|
|
chip = ret;
|
|
|
|
ret = bq2415x_detect_revision(bq);
|
|
if (ret < 0)
|
|
strcpy(revstr, "unknown");
|
|
else
|
|
sprintf(revstr, "1.%d", ret);
|
|
|
|
bq->model = kasprintf(GFP_KERNEL,
|
|
"chip %s, revision %s, vender code %.3d",
|
|
bq2415x_chip_name[chip], revstr,
|
|
bq2415x_get_vender_code(bq));
|
|
if (!bq->model) {
|
|
dev_err(bq->dev, "failed to allocate model name\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
|
|
&psy_cfg);
|
|
if (IS_ERR(bq->charger)) {
|
|
kfree(bq->model);
|
|
return PTR_ERR(bq->charger);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* main bq2415x probe function */
|
|
static int bq2415x_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int ret;
|
|
int num;
|
|
char *name = NULL;
|
|
struct bq2415x_device *bq;
|
|
struct device_node *np = client->dev.of_node;
|
|
struct bq2415x_platform_data *pdata = client->dev.platform_data;
|
|
const struct acpi_device_id *acpi_id = NULL;
|
|
struct power_supply *notify_psy = NULL;
|
|
union power_supply_propval prop;
|
|
|
|
if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
|
|
dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Get new ID for the new device */
|
|
mutex_lock(&bq2415x_id_mutex);
|
|
num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
|
|
mutex_unlock(&bq2415x_id_mutex);
|
|
if (num < 0)
|
|
return num;
|
|
|
|
if (id) {
|
|
name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
|
|
} else if (ACPI_HANDLE(&client->dev)) {
|
|
acpi_id =
|
|
acpi_match_device(client->dev.driver->acpi_match_table,
|
|
&client->dev);
|
|
if (!acpi_id) {
|
|
dev_err(&client->dev, "failed to match device name\n");
|
|
ret = -ENODEV;
|
|
goto error_1;
|
|
}
|
|
name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
|
|
}
|
|
if (!name) {
|
|
dev_err(&client->dev, "failed to allocate device name\n");
|
|
ret = -ENOMEM;
|
|
goto error_1;
|
|
}
|
|
|
|
bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
|
|
if (!bq) {
|
|
ret = -ENOMEM;
|
|
goto error_2;
|
|
}
|
|
|
|
i2c_set_clientdata(client, bq);
|
|
|
|
bq->id = num;
|
|
bq->dev = &client->dev;
|
|
if (id)
|
|
bq->chip = id->driver_data;
|
|
else if (ACPI_HANDLE(bq->dev))
|
|
bq->chip = acpi_id->driver_data;
|
|
bq->name = name;
|
|
bq->mode = BQ2415X_MODE_OFF;
|
|
bq->reported_mode = BQ2415X_MODE_OFF;
|
|
bq->autotimer = 0;
|
|
bq->automode = 0;
|
|
|
|
if (np || ACPI_HANDLE(bq->dev)) {
|
|
ret = device_property_read_u32(bq->dev,
|
|
"ti,current-limit",
|
|
&bq->init_data.current_limit);
|
|
if (ret)
|
|
goto error_2;
|
|
ret = device_property_read_u32(bq->dev,
|
|
"ti,weak-battery-voltage",
|
|
&bq->init_data.weak_battery_voltage);
|
|
if (ret)
|
|
goto error_2;
|
|
ret = device_property_read_u32(bq->dev,
|
|
"ti,battery-regulation-voltage",
|
|
&bq->init_data.battery_regulation_voltage);
|
|
if (ret)
|
|
goto error_2;
|
|
ret = device_property_read_u32(bq->dev,
|
|
"ti,charge-current",
|
|
&bq->init_data.charge_current);
|
|
if (ret)
|
|
goto error_2;
|
|
ret = device_property_read_u32(bq->dev,
|
|
"ti,termination-current",
|
|
&bq->init_data.termination_current);
|
|
if (ret)
|
|
goto error_2;
|
|
ret = device_property_read_u32(bq->dev,
|
|
"ti,resistor-sense",
|
|
&bq->init_data.resistor_sense);
|
|
if (ret)
|
|
goto error_2;
|
|
if (np)
|
|
bq->notify_node = of_parse_phandle(np,
|
|
"ti,usb-charger-detection", 0);
|
|
} else {
|
|
memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
|
|
}
|
|
|
|
bq2415x_reset_chip(bq);
|
|
|
|
ret = bq2415x_power_supply_init(bq);
|
|
if (ret) {
|
|
dev_err(bq->dev, "failed to register power supply: %d\n", ret);
|
|
goto error_2;
|
|
}
|
|
|
|
ret = bq2415x_set_defaults(bq);
|
|
if (ret) {
|
|
dev_err(bq->dev, "failed to set default values: %d\n", ret);
|
|
goto error_3;
|
|
}
|
|
|
|
if (bq->notify_node || bq->init_data.notify_device) {
|
|
bq->nb.notifier_call = bq2415x_notifier_call;
|
|
ret = power_supply_reg_notifier(&bq->nb);
|
|
if (ret) {
|
|
dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
|
|
goto error_3;
|
|
}
|
|
|
|
bq->automode = 1;
|
|
dev_info(bq->dev, "automode supported, waiting for events\n");
|
|
} else {
|
|
bq->automode = -1;
|
|
dev_info(bq->dev, "automode not supported\n");
|
|
}
|
|
|
|
/* Query for initial reported_mode and set it */
|
|
if (bq->nb.notifier_call) {
|
|
if (np) {
|
|
notify_psy = power_supply_get_by_phandle(np,
|
|
"ti,usb-charger-detection");
|
|
if (IS_ERR(notify_psy))
|
|
notify_psy = NULL;
|
|
} else if (bq->init_data.notify_device) {
|
|
notify_psy = power_supply_get_by_name(
|
|
bq->init_data.notify_device);
|
|
}
|
|
}
|
|
if (notify_psy) {
|
|
ret = power_supply_get_property(notify_psy,
|
|
POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
|
|
power_supply_put(notify_psy);
|
|
|
|
if (ret == 0) {
|
|
bq2415x_update_reported_mode(bq, prop.intval);
|
|
bq2415x_set_mode(bq, bq->reported_mode);
|
|
}
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
|
|
bq2415x_set_autotimer(bq, 1);
|
|
|
|
dev_info(bq->dev, "driver registered\n");
|
|
return 0;
|
|
|
|
error_3:
|
|
bq2415x_power_supply_exit(bq);
|
|
error_2:
|
|
if (bq)
|
|
of_node_put(bq->notify_node);
|
|
kfree(name);
|
|
error_1:
|
|
mutex_lock(&bq2415x_id_mutex);
|
|
idr_remove(&bq2415x_id, num);
|
|
mutex_unlock(&bq2415x_id_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* main bq2415x remove function */
|
|
|
|
static void bq2415x_remove(struct i2c_client *client)
|
|
{
|
|
struct bq2415x_device *bq = i2c_get_clientdata(client);
|
|
|
|
if (bq->nb.notifier_call)
|
|
power_supply_unreg_notifier(&bq->nb);
|
|
|
|
of_node_put(bq->notify_node);
|
|
bq2415x_power_supply_exit(bq);
|
|
|
|
bq2415x_reset_chip(bq);
|
|
|
|
mutex_lock(&bq2415x_id_mutex);
|
|
idr_remove(&bq2415x_id, bq->id);
|
|
mutex_unlock(&bq2415x_id_mutex);
|
|
|
|
dev_info(bq->dev, "driver unregistered\n");
|
|
|
|
kfree(bq->name);
|
|
}
|
|
|
|
static const struct i2c_device_id bq2415x_i2c_id_table[] = {
|
|
{ "bq2415x", BQUNKNOWN },
|
|
{ "bq24150", BQ24150 },
|
|
{ "bq24150a", BQ24150A },
|
|
{ "bq24151", BQ24151 },
|
|
{ "bq24151a", BQ24151A },
|
|
{ "bq24152", BQ24152 },
|
|
{ "bq24153", BQ24153 },
|
|
{ "bq24153a", BQ24153A },
|
|
{ "bq24155", BQ24155 },
|
|
{ "bq24156", BQ24156 },
|
|
{ "bq24156a", BQ24156A },
|
|
{ "bq24157s", BQ24157S },
|
|
{ "bq24158", BQ24158 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id bq2415x_i2c_acpi_match[] = {
|
|
{ "BQ2415X", BQUNKNOWN },
|
|
{ "BQ241500", BQ24150 },
|
|
{ "BQA24150", BQ24150A },
|
|
{ "BQ241510", BQ24151 },
|
|
{ "BQA24151", BQ24151A },
|
|
{ "BQ241520", BQ24152 },
|
|
{ "BQ241530", BQ24153 },
|
|
{ "BQA24153", BQ24153A },
|
|
{ "BQ241550", BQ24155 },
|
|
{ "BQ241560", BQ24156 },
|
|
{ "BQA24156", BQ24156A },
|
|
{ "BQS24157", BQ24157S },
|
|
{ "BQ241580", BQ24158 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
|
|
#endif
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id bq2415x_of_match_table[] = {
|
|
{ .compatible = "ti,bq24150" },
|
|
{ .compatible = "ti,bq24150a" },
|
|
{ .compatible = "ti,bq24151" },
|
|
{ .compatible = "ti,bq24151a" },
|
|
{ .compatible = "ti,bq24152" },
|
|
{ .compatible = "ti,bq24153" },
|
|
{ .compatible = "ti,bq24153a" },
|
|
{ .compatible = "ti,bq24155" },
|
|
{ .compatible = "ti,bq24156" },
|
|
{ .compatible = "ti,bq24156a" },
|
|
{ .compatible = "ti,bq24157s" },
|
|
{ .compatible = "ti,bq24158" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, bq2415x_of_match_table);
|
|
#endif
|
|
|
|
static struct i2c_driver bq2415x_driver = {
|
|
.driver = {
|
|
.name = "bq2415x-charger",
|
|
.of_match_table = of_match_ptr(bq2415x_of_match_table),
|
|
.acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
|
|
},
|
|
.probe = bq2415x_probe,
|
|
.remove = bq2415x_remove,
|
|
.id_table = bq2415x_i2c_id_table,
|
|
};
|
|
module_i2c_driver(bq2415x_driver);
|
|
|
|
MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
|
|
MODULE_DESCRIPTION("bq2415x charger driver");
|
|
MODULE_LICENSE("GPL");
|