diff options
Diffstat (limited to 'drivers/gpio/gpio-palmas.c')
| -rw-r--r-- | drivers/gpio/gpio-palmas.c | 93 |
1 files changed, 75 insertions, 18 deletions
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c index e3a4e56f5a42..11801e986dd9 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); @@ -42,10 +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, reg, &val); + if (ret < 0) { + dev_err(gc->dev, "Reg 0x%02x read failed, %d\n", reg, ret); + return ret; + } - 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 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)); @@ -57,17 +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, @@ -76,14 +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; } @@ -92,11 +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; } @@ -108,12 +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); @@ -125,7 +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; @@ -134,7 +190,7 @@ static int palmas_gpio_probe(struct platform_device *pdev) palmas_gpio->gpio_chip.get = palmas_gpio_get; palmas_gpio->gpio_chip.dev = &pdev->dev; #ifdef CONFIG_OF_GPIO - palmas_gpio->gpio_chip.of_node = palmas->dev->of_node; + palmas_gpio->gpio_chip.of_node = pdev->dev.of_node; #endif palmas_pdata = dev_get_platdata(palmas->dev); if (palmas_pdata && palmas_pdata->gpio_base) @@ -162,6 +218,7 @@ static int palmas_gpio_remove(struct platform_device *pdev) static struct platform_driver palmas_gpio_driver = { .driver.name = "palmas-gpio", .driver.owner = THIS_MODULE, + .driver.of_match_table = of_palmas_gpio_match, .probe = palmas_gpio_probe, .remove = palmas_gpio_remove, }; |