diff options
author | Laxman Dewangan <ldewangan@nvidia.com> | 2013-09-03 14:28:03 (GMT) |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2013-09-19 13:31:48 (GMT) |
commit | ca6af7b96ab621371f5f408e3fe7bd1e5cb063aa (patch) | |
tree | cdf4c99fb8f72b248eb9cb432a62cb70d92f636a /drivers/gpio/gpio-palmas.c | |
parent | 7b17b59feaa8b0a54a333005b87ad7ea804d021f (diff) | |
download | linux-ca6af7b96ab621371f5f408e3fe7bd1e5cb063aa.tar.xz |
gpio: palmas: add support for TPS80036
TI Palmas series device TPS80036 supports 16 GPIOs.
Register its all 16 gpios when this device is selected.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-palmas.c')
-rw-r--r-- | drivers/gpio/gpio-palmas.c | 104 |
1 files changed, 69 insertions, 35 deletions
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c index 8588af0..11801e98 100644 --- a/drivers/gpio/gpio-palmas.c +++ b/drivers/gpio/gpio-palmas.c @@ -31,6 +31,10 @@ struct palmas_gpio { struct palmas *palmas; }; +struct palmas_device_data { + int ngpio; +}; + static inline struct palmas_gpio *to_palmas_gpio(struct gpio_chip *chip) { return container_of(chip, struct palmas_gpio, gpio_chip); @@ -42,23 +46,26 @@ static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset) struct palmas *palmas = pg->palmas; unsigned int val; int ret; + unsigned int reg; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; - ret = palmas_read(palmas, PALMAS_GPIO_BASE, PALMAS_GPIO_DATA_DIR, &val); + ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val); if (ret < 0) { - dev_err(gc->dev, "GPIO_DATA_DIR read failed, err = %d\n", ret); + dev_err(gc->dev, "Reg 0x%02x read failed, %d\n", reg, ret); return ret; } - if (val & (1 << offset)) { - ret = palmas_read(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_DATA_OUT, &val); - } else { - ret = palmas_read(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_DATA_IN, &val); - } + if (val & BIT(offset)) + reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT; + else + reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN; + + ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val); if (ret < 0) { - dev_err(gc->dev, "GPIO_DATA_IN/OUT read failed, err = %d\n", - ret); + dev_err(gc->dev, "Reg 0x%02x read failed, %d\n", reg, ret); return ret; } return !!(val & BIT(offset)); @@ -70,17 +77,20 @@ static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset, struct palmas_gpio *pg = to_palmas_gpio(gc); struct palmas *palmas = pg->palmas; int ret; + unsigned int reg; + int gpio16 = (offset/8); - if (value) - ret = palmas_write(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_SET_DATA_OUT, BIT(offset)); + offset %= 8; + if (gpio16) + reg = (value) ? + PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2; else - ret = palmas_write(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_CLEAR_DATA_OUT, BIT(offset)); + reg = (value) ? + PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT; + + ret = palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset)); if (ret < 0) - dev_err(gc->dev, "%s write failed, err = %d\n", - (value) ? "GPIO_SET_DATA_OUT" : "GPIO_CLEAR_DATA_OUT", - ret); + dev_err(gc->dev, "Reg 0x%02x write failed, %d\n", reg, ret); } static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset, @@ -89,14 +99,19 @@ static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset, struct palmas_gpio *pg = to_palmas_gpio(gc); struct palmas *palmas = pg->palmas; int ret; + unsigned int reg; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; /* Set the initial value */ palmas_gpio_set(gc, offset, value); - ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_DATA_DIR, BIT(offset), BIT(offset)); + ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, + BIT(offset), BIT(offset)); if (ret < 0) - dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret); + dev_err(gc->dev, "Reg 0x%02x update failed, %d\n", reg, ret); return ret; } @@ -105,11 +120,15 @@ static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset) struct palmas_gpio *pg = to_palmas_gpio(gc); struct palmas *palmas = pg->palmas; int ret; + unsigned int reg; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; - ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_DATA_DIR, BIT(offset), 0); + ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0); if (ret < 0) - dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret); + dev_err(gc->dev, "Reg 0x%02x update failed, %d\n", reg, ret); return ret; } @@ -121,12 +140,36 @@ static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset) return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset); } +static const struct palmas_device_data palmas_dev_data = { + .ngpio = 8, +}; + +static const struct palmas_device_data tps80036_dev_data = { + .ngpio = 16, +}; + +static struct of_device_id of_palmas_gpio_match[] = { + { .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,}, + { .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,}, + { .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,}, + { .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,}, + { }, +}; +MODULE_DEVICE_TABLE(of, of_palmas_gpio_match); + static int palmas_gpio_probe(struct platform_device *pdev) { struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); struct palmas_platform_data *palmas_pdata; struct palmas_gpio *palmas_gpio; int ret; + const struct of_device_id *match; + const struct palmas_device_data *dev_data; + + match = of_match_device(of_palmas_gpio_match, &pdev->dev); + dev_data = match->data; + if (!dev_data) + dev_data = &palmas_dev_data; palmas_gpio = devm_kzalloc(&pdev->dev, sizeof(*palmas_gpio), GFP_KERNEL); @@ -138,7 +181,7 @@ static int palmas_gpio_probe(struct platform_device *pdev) palmas_gpio->palmas = palmas; palmas_gpio->gpio_chip.owner = THIS_MODULE; palmas_gpio->gpio_chip.label = dev_name(&pdev->dev); - palmas_gpio->gpio_chip.ngpio = 8; + palmas_gpio->gpio_chip.ngpio = dev_data->ngpio; palmas_gpio->gpio_chip.can_sleep = 1; palmas_gpio->gpio_chip.direction_input = palmas_gpio_input; palmas_gpio->gpio_chip.direction_output = palmas_gpio_output; @@ -172,15 +215,6 @@ static int palmas_gpio_remove(struct platform_device *pdev) return gpiochip_remove(&palmas_gpio->gpio_chip); } -static struct of_device_id of_palmas_gpio_match[] = { - { .compatible = "ti,palmas-gpio"}, - { .compatible = "ti,tps65913-gpio"}, - { .compatible = "ti,tps65914-gpio"}, - { .compatible = "ti,tps80036-gpio"}, - { }, -}; -MODULE_DEVICE_TABLE(of, of_palmas_gpio_match); - static struct platform_driver palmas_gpio_driver = { .driver.name = "palmas-gpio", .driver.owner = THIS_MODULE, |