power: bq27xxx_battery: Reorganize I2C into a module
Separate out I2C functionality into a module. This fixes several small issues and simplifies the driver initialization. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Andrew F. Davis
Sebastian Reichel
Родитель
1f94b2563a
Коммит
703df6c097
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@ -160,22 +160,16 @@ config BATTERY_SBS
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config BATTERY_BQ27XXX
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tristate "BQ27xxx battery driver"
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help
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Say Y here to enable support for batteries with BQ27xxx (I2C/HDQ) chips.
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Say Y here to enable support for batteries with BQ27xxx chips.
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config BATTERY_BQ27XXX_I2C
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bool "BQ27xxx I2C support"
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tristate "BQ27xxx I2C support"
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depends on BATTERY_BQ27XXX
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depends on I2C
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default y
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help
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Say Y here to enable support for batteries with BQ27xxx (I2C) chips.
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config BATTERY_BQ27XXX_PLATFORM
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bool "BQ27xxx HDQ support"
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depends on BATTERY_BQ27XXX
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default y
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help
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Say Y here to enable support for batteries with BQ27xxx (HDQ) chips.
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Say Y here to enable support for batteries with BQ27xxx chips
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connected over an I2C bus.
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config BATTERY_DA9030
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tristate "DA9030 battery driver"
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@ -31,6 +31,7 @@ obj-$(CONFIG_BATTERY_IPAQ_MICRO) += ipaq_micro_battery.o
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obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
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obj-$(CONFIG_BATTERY_SBS) += sbs-battery.o
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obj-$(CONFIG_BATTERY_BQ27XXX) += bq27xxx_battery.o
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obj-$(CONFIG_BATTERY_BQ27XXX_I2C) += bq27xxx_battery_i2c.o
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obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
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obj-$(CONFIG_BATTERY_DA9052) += da9052-battery.o
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obj-$(CONFIG_CHARGER_DA9150) += da9150-charger.o
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@ -45,11 +45,7 @@
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#include <linux/delay.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/interrupt.h>
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#include <asm/unaligned.h>
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#include <linux/power/bq27xxx_battery.h>
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@ -78,11 +74,6 @@
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#define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */
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#define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */
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struct bq27xxx_device_info;
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struct bq27xxx_access_methods {
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int (*read)(struct bq27xxx_device_info *di, u8 reg, bool single);
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};
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#define INVALID_REG_ADDR 0xff
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/*
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@ -110,40 +101,6 @@ enum bq27xxx_reg_index {
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BQ27XXX_REG_AP, /* Average Power */
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};
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struct bq27xxx_reg_cache {
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int temperature;
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int time_to_empty;
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int time_to_empty_avg;
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int time_to_full;
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int charge_full;
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int cycle_count;
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int capacity;
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int energy;
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int flags;
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int power_avg;
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int health;
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};
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struct bq27xxx_device_info {
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struct device *dev;
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int id;
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enum bq27xxx_chip chip;
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struct bq27xxx_reg_cache cache;
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int charge_design_full;
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unsigned long last_update;
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struct delayed_work work;
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struct power_supply *bat;
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struct bq27xxx_access_methods bus;
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struct mutex lock;
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u8 *regs;
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};
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/* Register mappings */
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static u8 bq27000_regs[] = {
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0x00, /* CONTROL */
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@ -710,7 +667,7 @@ static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
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return POWER_SUPPLY_HEALTH_GOOD;
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}
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static void bq27xxx_battery_update(struct bq27xxx_device_info *di)
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void bq27xxx_battery_update(struct bq27xxx_device_info *di)
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{
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struct bq27xxx_reg_cache cache = {0, };
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bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010;
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@ -761,6 +718,7 @@ static void bq27xxx_battery_update(struct bq27xxx_device_info *di)
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di->last_update = jiffies;
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}
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EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
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static void bq27xxx_battery_poll(struct work_struct *work)
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{
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@ -991,32 +949,30 @@ static void bq27xxx_external_power_changed(struct power_supply *psy)
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schedule_delayed_work(&di->work, 0);
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}
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static int bq27xxx_powersupply_init(struct bq27xxx_device_info *di,
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const char *name)
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int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
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{
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int ret;
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struct power_supply_desc *psy_desc;
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struct power_supply_config psy_cfg = { .drv_data = di, };
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INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
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mutex_init(&di->lock);
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di->regs = bq27xxx_regs[di->chip];
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psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
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if (!psy_desc)
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return -ENOMEM;
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psy_desc->name = name;
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psy_desc->name = di->name;
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psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
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psy_desc->properties = bq27xxx_battery_props[di->chip].props;
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psy_desc->num_properties = bq27xxx_battery_props[di->chip].size;
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psy_desc->get_property = bq27xxx_battery_get_property;
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psy_desc->external_power_changed = bq27xxx_external_power_changed;
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INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
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mutex_init(&di->lock);
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di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
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if (IS_ERR(di->bat)) {
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ret = PTR_ERR(di->bat);
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dev_err(di->dev, "failed to register battery: %d\n", ret);
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return ret;
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dev_err(di->dev, "failed to register battery\n");
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return PTR_ERR(di->bat);
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}
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dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
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@ -1025,8 +981,9 @@ static int bq27xxx_powersupply_init(struct bq27xxx_device_info *di,
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return 0;
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}
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EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
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static void bq27xxx_powersupply_unregister(struct bq27xxx_device_info *di)
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void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
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{
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/*
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* power_supply_unregister call bq27xxx_battery_get_property which
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@ -1042,192 +999,7 @@ static void bq27xxx_powersupply_unregister(struct bq27xxx_device_info *di)
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mutex_destroy(&di->lock);
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}
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/* i2c specific code */
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#ifdef CONFIG_BATTERY_BQ27XXX_I2C
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/* If the system has several batteries we need a different name for each
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* of them...
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*/
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static DEFINE_IDR(battery_id);
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static DEFINE_MUTEX(battery_mutex);
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static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
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{
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struct bq27xxx_device_info *di = data;
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bq27xxx_battery_update(di);
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return IRQ_HANDLED;
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}
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static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
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bool single)
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{
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struct i2c_client *client = to_i2c_client(di->dev);
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struct i2c_msg msg[2];
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unsigned char data[2];
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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 = data;
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if (single)
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msg[1].len = 1;
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else
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msg[1].len = 2;
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
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if (ret < 0)
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return ret;
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if (!single)
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ret = get_unaligned_le16(data);
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else
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ret = data[0];
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return ret;
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}
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static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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char *name;
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struct bq27xxx_device_info *di;
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int num;
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int retval = 0;
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/* Get new ID for the new battery device */
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mutex_lock(&battery_mutex);
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num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
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mutex_unlock(&battery_mutex);
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if (num < 0)
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return num;
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name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
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if (!name) {
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retval = -ENOMEM;
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goto batt_failed;
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}
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di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
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if (!di) {
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retval = -ENOMEM;
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goto batt_failed;
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}
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di->id = num;
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di->dev = &client->dev;
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di->chip = id->driver_data;
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di->bus.read = &bq27xxx_battery_i2c_read;
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di->regs = bq27xxx_regs[di->chip];
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retval = bq27xxx_powersupply_init(di, name);
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if (retval)
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goto batt_failed;
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/* Schedule a polling after about 1 min */
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schedule_delayed_work(&di->work, 60 * HZ);
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i2c_set_clientdata(client, di);
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if (client->irq) {
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retval = devm_request_threaded_irq(&client->dev, client->irq,
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NULL, bq27xxx_battery_irq_handler_thread,
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IRQF_ONESHOT,
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name, di);
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if (retval) {
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dev_err(&client->dev,
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"Unable to register IRQ %d error %d\n",
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client->irq, retval);
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return retval;
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}
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}
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return 0;
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batt_failed:
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mutex_lock(&battery_mutex);
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idr_remove(&battery_id, num);
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mutex_unlock(&battery_mutex);
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return retval;
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}
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static int bq27xxx_battery_i2c_remove(struct i2c_client *client)
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{
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struct bq27xxx_device_info *di = i2c_get_clientdata(client);
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bq27xxx_powersupply_unregister(di);
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mutex_lock(&battery_mutex);
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idr_remove(&battery_id, di->id);
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mutex_unlock(&battery_mutex);
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return 0;
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}
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static const struct i2c_device_id bq27xxx_id[] = {
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{ "bq27200", BQ27000 },
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{ "bq27210", BQ27010 },
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{ "bq27500", BQ27500 },
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{ "bq27510", BQ27500 },
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{ "bq27520", BQ27500 },
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{ "bq27530", BQ27530 },
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{ "bq27531", BQ27530 },
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{ "bq27541", BQ27541 },
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{ "bq27542", BQ27541 },
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{ "bq27546", BQ27541 },
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{ "bq27742", BQ27541 },
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{ "bq27545", BQ27545 },
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{ "bq27421", BQ27421 },
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{ "bq27425", BQ27421 },
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{ "bq27441", BQ27421 },
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{ "bq27621", BQ27421 },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, bq27xxx_id);
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static struct i2c_driver bq27xxx_battery_i2c_driver = {
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.driver = {
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.name = "bq27xxx-battery",
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},
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.probe = bq27xxx_battery_i2c_probe,
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.remove = bq27xxx_battery_i2c_remove,
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.id_table = bq27xxx_id,
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};
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static inline int bq27xxx_battery_i2c_init(void)
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{
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int ret = i2c_add_driver(&bq27xxx_battery_i2c_driver);
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if (ret)
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pr_err("Unable to register BQ27xxx i2c driver\n");
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return ret;
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}
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static inline void bq27xxx_battery_i2c_exit(void)
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{
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i2c_del_driver(&bq27xxx_battery_i2c_driver);
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}
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#else
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static inline int bq27xxx_battery_i2c_init(void) { return 0; }
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static inline void bq27xxx_battery_i2c_exit(void) {};
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#endif
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/* platform specific code */
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#ifdef CONFIG_BATTERY_BQ27XXX_PLATFORM
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EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
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static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg,
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bool single)
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@ -1267,7 +1039,6 @@ static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
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{
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struct bq27xxx_device_info *di;
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struct bq27xxx_platform_data *pdata = pdev->dev.platform_data;
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const char *name;
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if (!pdata) {
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dev_err(&pdev->dev, "no platform_data supplied\n");
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@ -1292,83 +1063,36 @@ static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
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di->dev = &pdev->dev;
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di->chip = pdata->chip;
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di->regs = bq27xxx_regs[di->chip];
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di->name = pdata->name ?: dev_name(&pdev->dev);
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di->bus.read = bq27xxx_battery_platform_read;
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name = pdata->name ?: dev_name(&pdev->dev);
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di->bus.read = &bq27xxx_battery_platform_read;
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return bq27xxx_powersupply_init(di, name);
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return bq27xxx_battery_setup(di);
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}
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static int bq27xxx_battery_platform_remove(struct platform_device *pdev)
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{
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struct bq27xxx_device_info *di = platform_get_drvdata(pdev);
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bq27xxx_powersupply_unregister(di);
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bq27xxx_battery_teardown(di);
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return 0;
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}
|
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|
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static const struct platform_device_id bq27xxx_battery_platform_id_table[] = {
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{ "bq27000-battery", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table);
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static struct platform_driver bq27xxx_battery_platform_driver = {
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.probe = bq27xxx_battery_platform_probe,
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.remove = bq27xxx_battery_platform_remove,
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.driver = {
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.name = "bq27000-battery",
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},
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.id_table = bq27xxx_battery_platform_id_table,
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};
|
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|
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static inline int bq27xxx_battery_platform_init(void)
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{
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int ret = platform_driver_register(&bq27xxx_battery_platform_driver);
|
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|
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if (ret)
|
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pr_err("Unable to register BQ27xxx platform driver\n");
|
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|
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return ret;
|
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}
|
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|
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static inline void bq27xxx_battery_platform_exit(void)
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{
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platform_driver_unregister(&bq27xxx_battery_platform_driver);
|
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}
|
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|
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#else
|
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|
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static inline int bq27xxx_battery_platform_init(void) { return 0; }
|
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static inline void bq27xxx_battery_platform_exit(void) {};
|
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|
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#endif
|
||||
|
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/*
|
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* Module stuff
|
||||
*/
|
||||
|
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static int __init bq27xxx_battery_init(void)
|
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{
|
||||
int ret;
|
||||
|
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ret = bq27xxx_battery_i2c_init();
|
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if (ret)
|
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return ret;
|
||||
|
||||
ret = bq27xxx_battery_platform_init();
|
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if (ret)
|
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bq27xxx_battery_i2c_exit();
|
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|
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return ret;
|
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}
|
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module_init(bq27xxx_battery_init);
|
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|
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static void __exit bq27xxx_battery_exit(void)
|
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{
|
||||
bq27xxx_battery_platform_exit();
|
||||
bq27xxx_battery_i2c_exit();
|
||||
}
|
||||
module_exit(bq27xxx_battery_exit);
|
||||
|
||||
#ifdef CONFIG_BATTERY_BQ27XXX_PLATFORM
|
||||
MODULE_ALIAS("platform:bq27000-battery");
|
||||
#endif
|
||||
module_platform_driver(bq27xxx_battery_platform_driver);
|
||||
|
||||
MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
|
||||
MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
|
||||
|
|
|
|||
|
|
@ -0,0 +1,150 @@
|
|||
/*
|
||||
* SCI Reset driver for Keystone based devices
|
||||
*
|
||||
* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
|
||||
* Andrew F. Davis <afd@ti.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
||||
* kind, whether express or implied; without even the implied warranty
|
||||
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <asm/unaligned.h>
|
||||
|
||||
#include <linux/power/bq27xxx_battery.h>
|
||||
|
||||
static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
|
||||
{
|
||||
struct bq27xxx_device_info *di = data;
|
||||
|
||||
bq27xxx_battery_update(di);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
|
||||
bool single)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(di->dev);
|
||||
struct i2c_msg msg[2];
|
||||
unsigned char data[2];
|
||||
int ret;
|
||||
|
||||
if (!client->adapter)
|
||||
return -ENODEV;
|
||||
|
||||
msg[0].addr = client->addr;
|
||||
msg[0].flags = 0;
|
||||
msg[0].buf = ®
|
||||
msg[0].len = sizeof(reg);
|
||||
msg[1].addr = client->addr;
|
||||
msg[1].flags = I2C_M_RD;
|
||||
msg[1].buf = data;
|
||||
if (single)
|
||||
msg[1].len = 1;
|
||||
else
|
||||
msg[1].len = 2;
|
||||
|
||||
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (!single)
|
||||
ret = get_unaligned_le16(data);
|
||||
else
|
||||
ret = data[0];
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct bq27xxx_device_info *di;
|
||||
int ret;
|
||||
|
||||
di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
|
||||
if (!di)
|
||||
return -ENOMEM;
|
||||
|
||||
di->dev = &client->dev;
|
||||
di->chip = id->driver_data;
|
||||
di->name = id->name;
|
||||
di->bus.read = bq27xxx_battery_i2c_read;
|
||||
|
||||
ret = bq27xxx_battery_setup(di);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Schedule a polling after about 1 min */
|
||||
schedule_delayed_work(&di->work, 60 * HZ);
|
||||
|
||||
i2c_set_clientdata(client, di);
|
||||
|
||||
if (client->irq) {
|
||||
ret = devm_request_threaded_irq(&client->dev, client->irq,
|
||||
NULL, bq27xxx_battery_irq_handler_thread,
|
||||
IRQF_ONESHOT,
|
||||
di->name, di);
|
||||
if (ret) {
|
||||
dev_err(&client->dev,
|
||||
"Unable to register IRQ %d error %d\n",
|
||||
client->irq, ret);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bq27xxx_battery_i2c_remove(struct i2c_client *client)
|
||||
{
|
||||
struct bq27xxx_device_info *di = i2c_get_clientdata(client);
|
||||
|
||||
bq27xxx_battery_teardown(di);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
|
||||
{ "bq27200", BQ27000 },
|
||||
{ "bq27210", BQ27010 },
|
||||
{ "bq27500", BQ27500 },
|
||||
{ "bq27510", BQ27500 },
|
||||
{ "bq27520", BQ27500 },
|
||||
{ "bq27530", BQ27530 },
|
||||
{ "bq27531", BQ27530 },
|
||||
{ "bq27541", BQ27541 },
|
||||
{ "bq27542", BQ27541 },
|
||||
{ "bq27546", BQ27541 },
|
||||
{ "bq27742", BQ27541 },
|
||||
{ "bq27545", BQ27545 },
|
||||
{ "bq27421", BQ27421 },
|
||||
{ "bq27425", BQ27421 },
|
||||
{ "bq27441", BQ27421 },
|
||||
{ "bq27621", BQ27421 },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table);
|
||||
|
||||
static struct i2c_driver bq27xxx_battery_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "bq27xxx-battery",
|
||||
},
|
||||
.probe = bq27xxx_battery_i2c_probe,
|
||||
.remove = bq27xxx_battery_i2c_remove,
|
||||
.id_table = bq27xxx_i2c_id_table,
|
||||
};
|
||||
module_i2c_driver(bq27xxx_battery_i2c_driver);
|
||||
|
||||
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
|
||||
MODULE_DESCRIPTION("BQ27xxx battery monitor i2c driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -1,6 +1,16 @@
|
|||
#ifndef __LINUX_BQ27X00_BATTERY_H__
|
||||
#define __LINUX_BQ27X00_BATTERY_H__
|
||||
|
||||
enum bq27xxx_chip {
|
||||
BQ27000 = 1, /* bq27000, bq27200 */
|
||||
BQ27010, /* bq27010, bq27210 */
|
||||
BQ27500, /* bq27500, bq27510, bq27520 */
|
||||
BQ27530, /* bq27530, bq27531 */
|
||||
BQ27541, /* bq27541, bq27542, bq27546, bq27742 */
|
||||
BQ27545, /* bq27545 */
|
||||
BQ27421, /* bq27421, bq27425, bq27441, bq27621 */
|
||||
};
|
||||
|
||||
/**
|
||||
* struct bq27xxx_plaform_data - Platform data for bq27xxx devices
|
||||
* @name: Name of the battery.
|
||||
|
|
@ -12,20 +22,47 @@
|
|||
* register to be read. The return value should either be the content of
|
||||
* the passed register or an error value.
|
||||
*/
|
||||
enum bq27xxx_chip {
|
||||
BQ27000 = 1, /* bq27000, bq27200 */
|
||||
BQ27010, /* bq27010, bq27210 */
|
||||
BQ27500, /* bq27500, bq27510, bq27520 */
|
||||
BQ27530, /* bq27530, bq27531 */
|
||||
BQ27541, /* bq27541, bq27542, bq27546, bq27742 */
|
||||
BQ27545, /* bq27545 */
|
||||
BQ27421, /* bq27421, bq27425, bq27441, bq27621 */
|
||||
};
|
||||
|
||||
struct bq27xxx_platform_data {
|
||||
const char *name;
|
||||
enum bq27xxx_chip chip;
|
||||
int (*read)(struct device *dev, unsigned int);
|
||||
};
|
||||
|
||||
struct bq27xxx_device_info;
|
||||
struct bq27xxx_access_methods {
|
||||
int (*read)(struct bq27xxx_device_info *di, u8 reg, bool single);
|
||||
};
|
||||
|
||||
struct bq27xxx_reg_cache {
|
||||
int temperature;
|
||||
int time_to_empty;
|
||||
int time_to_empty_avg;
|
||||
int time_to_full;
|
||||
int charge_full;
|
||||
int cycle_count;
|
||||
int capacity;
|
||||
int energy;
|
||||
int flags;
|
||||
int power_avg;
|
||||
int health;
|
||||
};
|
||||
|
||||
struct bq27xxx_device_info {
|
||||
struct device *dev;
|
||||
enum bq27xxx_chip chip;
|
||||
const char *name;
|
||||
struct bq27xxx_access_methods bus;
|
||||
struct bq27xxx_reg_cache cache;
|
||||
int charge_design_full;
|
||||
unsigned long last_update;
|
||||
struct delayed_work work;
|
||||
struct power_supply *bat;
|
||||
struct mutex lock;
|
||||
u8 *regs;
|
||||
};
|
||||
|
||||
void bq27xxx_battery_update(struct bq27xxx_device_info *di);
|
||||
int bq27xxx_battery_setup(struct bq27xxx_device_info *di);
|
||||
void bq27xxx_battery_teardown(struct bq27xxx_device_info *di);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
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