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

Arnd Bergmann
2022-04-19T16:52:52Z

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;
}

--
2.29.2