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Date: Tue, 3 Sep 2013 19:58:03 +0530
From: Laxman Dewangan <ldewangan@...dia.com>
To: <linus.walleij@...aro.org>
CC: <swarren@...dia.com>, <linux-gpio@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH] 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@...dia.com>
---
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..11801e9 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,
--
1.7.1.1
--
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