[PATCH 40/48] ARM: pxa: tosa: use gpio lookup for battery

From: Arnd Bergmann arnd@arndb.de

The battery driver uses a lot of GPIO lines, hardcoded from a machine header file.

Change it to use a gpiod lookup table instead.

Reviewed-by: Sebastian Reichel sre@kernel.org Acked-by: Sebastian Reichel sre@kernel.org Cc: linux-pm@vger.kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de --- arch/arm/mach-pxa/tosa.c | 23 +++++ drivers/power/supply/tosa_battery.c | 147 ++++++++++++++++------------ 2 files changed, 109 insertions(+), 61 deletions(-)

diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c index 5a16a025192c..19fe79518aaf 100644 --- a/arch/arm/mach-pxa/tosa.c +++ b/arch/arm/mach-pxa/tosa.c @@ -366,6 +366,28 @@ static struct pxaficp_platform_data tosa_ficp_platform_data = { .shutdown = tosa_irda_shutdown, };

+static struct gpiod_lookup_table tosa_battery_gpio_table = { + .dev_id = "wm97xx-battery", + .table = { + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_CHARGE_OFF - TOSA_TC6393XB_GPIO_BASE, "main charge off", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_CHARGE_OFF_JC - TOSA_TC6393XB_GPIO_BASE, "jacket charge off", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_BAT_SW_ON - TOSA_TC6393XB_GPIO_BASE, "battery switch", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_BAT0_V_ON - TOSA_TC6393XB_GPIO_BASE, "main battery", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_BAT1_V_ON - TOSA_TC6393XB_GPIO_BASE, "jacket battery", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_BAT1_TH_ON - TOSA_TC6393XB_GPIO_BASE, "main battery temp", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_BAT0_TH_ON - TOSA_TC6393XB_GPIO_BASE, "jacket battery temp", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("tc6393xb", TOSA_GPIO_BU_CHRG_ON - TOSA_TC6393XB_GPIO_BASE, "backup battery", GPIO_ACTIVE_HIGH ), + + GPIO_LOOKUP("gpio-pxa", TOSA_GPIO_BAT0_CRG, "main battery full", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("gpio-pxa", TOSA_GPIO_BAT1_CRG, "jacket battery full", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("gpio-pxa", TOSA_GPIO_BAT0_LOW, "main battery low", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("gpio-pxa", TOSA_GPIO_BAT1_LOW, "jacket battery low", GPIO_ACTIVE_HIGH ), + GPIO_LOOKUP("gpio-pxa", TOSA_GPIO_JACKET_DETECT, "jacket detect", GPIO_ACTIVE_HIGH ), + { }, + }, +}; + + /* * Tosa AC IN */ @@ -954,6 +976,7 @@ static void __init tosa_init(void) /* enable batt_fault */ PMCR = 0x01;

+ gpiod_add_lookup_table(&tosa_battery_gpio_table); gpiod_add_lookup_table(&tosa_mci_gpio_table); gpiod_add_lookup_table(&tosa_audio_gpio_table); pxa_set_mci_info(&tosa_mci_platform_data); diff --git a/drivers/power/supply/tosa_battery.c b/drivers/power/supply/tosa_battery.c index b26b0eca33e1..d10320f348d0 100644 --- a/drivers/power/supply/tosa_battery.c +++ b/drivers/power/supply/tosa_battery.c @@ -15,11 +15,16 @@ #include <linux/gpio.h>

#include <asm/mach-types.h> -#include <mach/tosa.h>

static DEFINE_MUTEX(bat_lock); /* protects gpio pins */ static struct work_struct bat_work;

+struct tosa_gpio { + const char *con; + enum gpiod_flags flags; + struct gpio_desc *desc; +}; + struct tosa_bat { int status; struct power_supply *psy; @@ -28,38 +33,42 @@ struct tosa_bat { struct mutex work_lock; /* protects data */

bool (*is_present)(struct tosa_bat *bat); - int gpio_full; - int gpio_charge_off; + struct tosa_gpio gpio_full; + struct tosa_gpio gpio_charge_off;

int technology;

- int gpio_bat; + struct tosa_gpio gpio_bat; int adc_bat; int adc_bat_divider; int bat_max; int bat_min;

- int gpio_temp; + struct tosa_gpio gpio_temp; int adc_temp; int adc_temp_divider; };

static struct tosa_bat tosa_bat_main; static struct tosa_bat tosa_bat_jacket; +static struct tosa_gpio gpiod_jacket_det = { "jacket detect", GPIOD_IN }; +static struct tosa_gpio gpiod_battery_switch = { "battery switch", GPIOD_OUT_LOW }; +static struct tosa_gpio gpiod_main_battery_low = { "main battery low", GPIOD_IN }; +static struct tosa_gpio gpiod_jacket_battery_low = { "jacket battery low", GPIOD_IN };

static unsigned long tosa_read_bat(struct tosa_bat *bat) { unsigned long value = 0;

- if (bat->gpio_bat < 0 || bat->adc_bat < 0) + if (!bat->gpio_bat.desc || bat->adc_bat < 0) return 0;

mutex_lock(&bat_lock); - gpio_set_value(bat->gpio_bat, 1); + gpiod_set_value(bat->gpio_bat.desc, 1); msleep(5); value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent), bat->adc_bat); - gpio_set_value(bat->gpio_bat, 0); + gpiod_set_value(bat->gpio_bat.desc, 0); mutex_unlock(&bat_lock);

value = value * 1000000 / bat->adc_bat_divider; @@ -71,15 +80,15 @@ static unsigned long tosa_read_temp(struct tosa_bat *bat) { unsigned long value = 0;

- if (bat->gpio_temp < 0 || bat->adc_temp < 0) + if (!bat->gpio_temp.desc || bat->adc_temp < 0) return 0;

mutex_lock(&bat_lock); - gpio_set_value(bat->gpio_temp, 1); + gpiod_set_value(bat->gpio_temp.desc, 1); msleep(5); value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent), bat->adc_temp); - gpio_set_value(bat->gpio_temp, 0); + gpiod_set_value(bat->gpio_temp.desc, 0); mutex_unlock(&bat_lock);

value = value * 10000 / bat->adc_temp_divider; @@ -136,7 +145,7 @@ static int tosa_bat_get_property(struct power_supply *psy,

static bool tosa_jacket_bat_is_present(struct tosa_bat *bat) { - return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0; + return gpiod_get_value(gpiod_jacket_det.desc) == 0; }

static void tosa_bat_external_power_changed(struct power_supply *psy) @@ -166,23 +175,23 @@ static void tosa_bat_update(struct tosa_bat *bat) bat->full_chrg = -1; } else if (power_supply_am_i_supplied(psy)) { if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) { - gpio_set_value(bat->gpio_charge_off, 0); + gpiod_set_value(bat->gpio_charge_off.desc, 0); mdelay(15); }

- if (gpio_get_value(bat->gpio_full)) { + if (gpiod_get_value(bat->gpio_full.desc)) { if (old == POWER_SUPPLY_STATUS_CHARGING || bat->full_chrg == -1) bat->full_chrg = tosa_read_bat(bat);

- gpio_set_value(bat->gpio_charge_off, 1); + gpiod_set_value(bat->gpio_charge_off.desc, 1); bat->status = POWER_SUPPLY_STATUS_FULL; } else { - gpio_set_value(bat->gpio_charge_off, 0); + gpiod_set_value(bat->gpio_charge_off.desc, 0); bat->status = POWER_SUPPLY_STATUS_CHARGING; } } else { - gpio_set_value(bat->gpio_charge_off, 1); + gpiod_set_value(bat->gpio_charge_off.desc, 1); bat->status = POWER_SUPPLY_STATUS_DISCHARGING; }

@@ -251,18 +260,18 @@ static struct tosa_bat tosa_bat_main = { .full_chrg = -1, .psy = NULL,

- .gpio_full = TOSA_GPIO_BAT0_CRG, - .gpio_charge_off = TOSA_GPIO_CHARGE_OFF, + .gpio_full = { "main battery full", GPIOD_IN }, + .gpio_charge_off = { "main charge off" , GPIOD_OUT_HIGH },

.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,

- .gpio_bat = TOSA_GPIO_BAT0_V_ON, + .gpio_bat = { "main battery", GPIOD_OUT_LOW }, .adc_bat = WM97XX_AUX_ID3, .adc_bat_divider = 414, .bat_max = 4310000, .bat_min = 1551 * 1000000 / 414,

- .gpio_temp = TOSA_GPIO_BAT1_TH_ON, + .gpio_temp = { "main battery temp", GPIOD_OUT_LOW }, .adc_temp = WM97XX_AUX_ID2, .adc_temp_divider = 10000, }; @@ -273,18 +282,18 @@ static struct tosa_bat tosa_bat_jacket = { .psy = NULL,

.is_present = tosa_jacket_bat_is_present, - .gpio_full = TOSA_GPIO_BAT1_CRG, - .gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC, + .gpio_full = { "jacket battery full", GPIOD_IN }, + .gpio_charge_off = { "jacket charge off", GPIOD_OUT_HIGH },

.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,

- .gpio_bat = TOSA_GPIO_BAT1_V_ON, + .gpio_bat = { "jacket battery", GPIOD_OUT_LOW }, .adc_bat = WM97XX_AUX_ID3, .adc_bat_divider = 414, .bat_max = 4310000, .bat_min = 1551 * 1000000 / 414,

- .gpio_temp = TOSA_GPIO_BAT0_TH_ON, + .gpio_temp = { "jacket battery temp", GPIOD_OUT_LOW }, .adc_temp = WM97XX_AUX_ID2, .adc_temp_divider = 10000, }; @@ -294,36 +303,16 @@ static struct tosa_bat tosa_bat_bu = { .full_chrg = -1, .psy = NULL,

- .gpio_full = -1, - .gpio_charge_off = -1, - .technology = POWER_SUPPLY_TECHNOLOGY_LiMn,

- .gpio_bat = TOSA_GPIO_BU_CHRG_ON, + .gpio_bat = { "backup battery", GPIOD_OUT_LOW }, .adc_bat = WM97XX_AUX_ID4, .adc_bat_divider = 1266,

- .gpio_temp = -1, .adc_temp = -1, .adc_temp_divider = -1, };

-static struct gpio tosa_bat_gpios[] = { - { TOSA_GPIO_CHARGE_OFF, GPIOF_OUT_INIT_HIGH, "main charge off" }, - { TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" }, - { TOSA_GPIO_BAT_SW_ON, GPIOF_OUT_INIT_LOW, "battery switch" }, - { TOSA_GPIO_BAT0_V_ON, GPIOF_OUT_INIT_LOW, "main battery" }, - { TOSA_GPIO_BAT1_V_ON, GPIOF_OUT_INIT_LOW, "jacket battery" }, - { TOSA_GPIO_BAT1_TH_ON, GPIOF_OUT_INIT_LOW, "main battery temp" }, - { TOSA_GPIO_BAT0_TH_ON, GPIOF_OUT_INIT_LOW, "jacket battery temp" }, - { TOSA_GPIO_BU_CHRG_ON, GPIOF_OUT_INIT_LOW, "backup battery" }, - { TOSA_GPIO_BAT0_CRG, GPIOF_IN, "main battery full" }, - { TOSA_GPIO_BAT1_CRG, GPIOF_IN, "jacket battery full" }, - { TOSA_GPIO_BAT0_LOW, GPIOF_IN, "main battery low" }, - { TOSA_GPIO_BAT1_LOW, GPIOF_IN, "jacket battery low" }, - { TOSA_GPIO_JACKET_DETECT, GPIOF_IN, "jacket detect" }, -}; - #ifdef CONFIG_PM static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state) { @@ -343,6 +332,21 @@ static int tosa_bat_resume(struct platform_device *dev) #define tosa_bat_resume NULL #endif

+static int tosa_bat_gpio_get(struct device *dev, struct tosa_gpio *gpio) +{ + int ret; + + if (!gpio->con) + return 0; + + gpio->desc = devm_gpiod_get(dev, gpio->con, gpio->flags); + ret = PTR_ERR_OR_ZERO(gpio->desc); + if (ret) + dev_warn(dev, "failed to get gpio "%s"\n", gpio->con); + + return ret; +} + static int tosa_power_supply_register(struct device *dev, struct tosa_bat *bat, const struct power_supply_desc *desc) @@ -350,6 +354,23 @@ static int tosa_power_supply_register(struct device *dev, struct power_supply_config cfg = { .drv_data = bat, }; + int ret; + + ret = tosa_bat_gpio_get(dev, &bat->gpio_full); + if (ret) + return ret; + + ret = tosa_bat_gpio_get(dev, &bat->gpio_charge_off); + if (ret) + return ret; + + ret = tosa_bat_gpio_get(dev, &bat->gpio_bat); + if (ret) + return ret; + + ret = tosa_bat_gpio_get(dev, &bat->gpio_temp); + if (ret) + return ret;

mutex_init(&bat->work_lock); bat->psy = power_supply_register(dev, desc, &cfg); @@ -358,49 +379,55 @@ static int tosa_power_supply_register(struct device *dev, }

-static int tosa_bat_probe(struct platform_device *dev) +static int tosa_bat_probe(struct platform_device *pdev) { + struct device *dev = &pdev->dev; int ret;

if (!machine_is_tosa()) return -ENODEV;

- ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); + ret = tosa_bat_gpio_get(dev, &gpiod_jacket_det); if (ret) return ret;

+ /* these are not used anywhere, continue on failure */ + tosa_bat_gpio_get(dev, &gpiod_battery_switch); + tosa_bat_gpio_get(dev, &gpiod_main_battery_low); + tosa_bat_gpio_get(dev, &gpiod_jacket_battery_low); + INIT_WORK(&bat_work, tosa_bat_work);

- ret = tosa_power_supply_register(&dev->dev, &tosa_bat_main, + ret = tosa_power_supply_register(dev, &tosa_bat_main, &tosa_bat_main_desc); if (ret) goto err_psy_reg_main;

- ret = tosa_power_supply_register(&dev->dev, &tosa_bat_jacket, + ret = tosa_power_supply_register(dev, &tosa_bat_jacket, &tosa_bat_jacket_desc); if (ret) goto err_psy_reg_jacket;

- ret = tosa_power_supply_register(&dev->dev, &tosa_bat_bu, + ret = tosa_power_supply_register(dev, &tosa_bat_bu, &tosa_bat_bu_desc); if (ret) goto err_psy_reg_bu;

- ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), + ret = request_irq(gpiod_to_irq(tosa_bat_main.gpio_full.desc), tosa_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "main full", &tosa_bat_main); if (ret) goto err_req_main;

- ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), + ret = request_irq(gpiod_to_irq(tosa_bat_jacket.gpio_full.desc), tosa_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "jacket full", &tosa_bat_jacket); if (ret) goto err_req_jacket;

- ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), + ret = request_irq(gpiod_to_irq(gpiod_jacket_det.desc), tosa_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "jacket detect", &tosa_bat_jacket); @@ -409,9 +436,9 @@ static int tosa_bat_probe(struct platform_device *dev) return 0; }

- free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); + free_irq(gpiod_to_irq(tosa_bat_jacket.gpio_full.desc), &tosa_bat_jacket); err_req_jacket: - free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); + free_irq(gpiod_to_irq(tosa_bat_main.gpio_full.desc), &tosa_bat_main); err_req_main: power_supply_unregister(tosa_bat_bu.psy); err_psy_reg_bu: @@ -423,15 +450,14 @@ static int tosa_bat_probe(struct platform_device *dev) /* see comment in tosa_bat_remove */ cancel_work_sync(&bat_work);

- gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); return ret; }

static int tosa_bat_remove(struct platform_device *dev) { - free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket); - free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); - free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); + free_irq(gpiod_to_irq(gpiod_jacket_det.desc), &tosa_bat_jacket); + free_irq(gpiod_to_irq(tosa_bat_jacket.gpio_full.desc), &tosa_bat_jacket); + free_irq(gpiod_to_irq(tosa_bat_main.gpio_full.desc), &tosa_bat_main);

power_supply_unregister(tosa_bat_bu.psy); power_supply_unregister(tosa_bat_jacket.psy); @@ -443,7 +469,6 @@ static int tosa_bat_remove(struct platform_device *dev) * unregistered now. */ cancel_work_sync(&bat_work); - gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); return 0; }