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gpio: palmas: add support for TPS80036

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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>
This commit is contained in:
Laxman Dewangan 2013-09-03 19:58:03 +05:30 committed by Linus Walleij
parent 7b17b59fea
commit ca6af7b96a
1 changed files with 69 additions and 35 deletions
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104
drivers/gpio/gpio-palmas.c
View file

@ -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);
ret = palmas_read(palmas, PALMAS_GPIO_BASE, PALMAS_GPIO_DATA_DIR, &val);
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, "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);
ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE,
PALMAS_GPIO_DATA_DIR, BIT(offset), 0);
offset %= 8;
reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
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,