[PATCH 16/21] gpio: ab8500: Add internal pull up on GPIO of ab8540
From: Lee Jones
Date: Fri Dec 14 2012 - 11:21:34 EST
From: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxxxxx>
Add 4 GPIOs named GPIOx_VBAT which have both internal pull up
and pull down capability on ab8540. We can also select different
voltage domains for GPIOx_VBAT.
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Yang QU <yang.qu@xxxxxxxxxxxxxx>
Reviewed-by: Alexandre TORGUE <alexandre.torgue@xxxxxxxxxxxxxx>
Reviewed-by: Philippe LANGLAIS <philippe.langlais@xxxxxxxxxxxxxx>
Tested-by: Alexandre TORGUE <alexandre.torgue@xxxxxxxxxxxxxx>
Tested-by: Philippe LANGLAIS <philippe.langlais@xxxxxxxxxxxxxx>
---
drivers/gpio/gpio-ab8500.c | 64 ++++++++++++++++++++++++++++
include/linux/mfd/abx500/ab8500-gpio.h | 71 +++++++++++---------------------
2 files changed, 87 insertions(+), 48 deletions(-)
diff --git a/drivers/gpio/gpio-ab8500.c b/drivers/gpio/gpio-ab8500.c
index 757ae34..ff8df1f 100644
--- a/drivers/gpio/gpio-ab8500.c
+++ b/drivers/gpio/gpio-ab8500.c
@@ -72,6 +72,8 @@
#define AB8500_GPIO_IN5_REG 0x44
#define AB8500_GPIO_IN6_REG 0x45
#define AB9540_GPIO_IN7_REG 0x46
+#define AB8540_GPIO_VINSEL_REG 0x47
+#define AB8540_GPIO_PULL_UPDOWN_REG 0x48
#define AB8500_GPIO_ALTFUN_REG 0x50
#define AB8500_ALTFUN_REG_INDEX 6
#define AB9540_ALTFUN_REG_INDEX 7
@@ -80,6 +82,8 @@
#define AB8505_NUM_GPIO 53
#define AB8540_NUM_GPIO 56
#define AB8500_NUM_VIR_GPIO_IRQ 16
+#define AB8540_GPIO_PULL_UPDOWN_MASK 0x03
+#define AB8540_GPIO_VINSEL_MASK 0x03
enum ab8500_gpio_action {
NONE,
@@ -552,6 +556,20 @@ static int __devinit ab8500_gpio_probe(struct platform_device *pdev)
if (ret < 0)
goto out_free;
}
+
+ if (is_ab8540(parent)) {
+ ret = abx500_set_register_interruptible(ab8500_gpio->dev,
+ AB8500_MISC, AB8540_GPIO_VINSEL_REG,
+ pdata->config_vinsel);
+ if (ret < 0)
+ goto out_free;
+ ret = abx500_set_register_interruptible(ab8500_gpio->dev,
+ AB8500_MISC, AB8540_GPIO_PULL_UPDOWN_REG,
+ pdata->config_pullupdown);
+ if (ret < 0)
+ goto out_free;
+ }
+
ret = abx500_set_register_interruptible(ab8500_gpio->dev, AB8500_MISC,
AB8500_GPIO_ALTFUN_REG,
pdata->config_reg[altfun_reg_index]);
@@ -619,6 +637,52 @@ int ab8500_config_pulldown(struct device *dev,
EXPORT_SYMBOL(ab8500_config_pulldown);
/*
+ * ab8540_config_pull_updown() only available for following GPIOs:
+ * GPIO51(GPIO1_VBAT)
+ * GPIO52(GPIO2_VBAT)
+ * GPIO53(GPIO3_VBAT)
+ * GPIO54(GPIO4_VBAT)
+ */
+int ab8540_config_pull_updown(struct device *dev,
+ int gpio, enum ab8540_gpio_pull_updown reg)
+{
+ u8 offset = gpio - AB8500_PIN_GPIO(51);
+ u8 pos = 2 * offset;
+ int ret;
+
+ ret = abx500_mask_and_set_register_interruptible(dev,
+ AB8500_MISC, AB8540_GPIO_PULL_UPDOWN_REG,
+ AB8540_GPIO_PULL_UPDOWN_MASK << pos, reg << pos);
+ if (ret < 0)
+ dev_err(dev, "%s failed (%d)\n", __func__, ret);
+ return ret;
+}
+EXPORT_SYMBOL(ab8540_config_pull_updown);
+
+/*
+ * ab8540_gpio_config_vinsel() only available for following GPIOs:
+ * GPIO51(GPIO1_VBAT)
+ * GPIO52(GPIO2_VBAT)
+ * GPIO53(GPIO3_VBAT)
+ * GPIO54(GPIO4_VBAT)
+ */
+int ab8540_gpio_config_vinsel(struct device *dev,
+ int gpio, enum ab8540_gpio_vinsel reg)
+{
+ u8 offset = gpio - AB8500_PIN_GPIO(51);
+ u8 pos = 2 * offset;
+ int ret;
+
+ ret = abx500_mask_and_set_register_interruptible(dev,
+ AB8500_MISC, AB8540_GPIO_VINSEL_REG,
+ AB8540_GPIO_VINSEL_MASK << pos, reg << pos);
+ if (ret < 0)
+ dev_err(dev, "%s failed (%d)\n", __func__, ret);
+ return ret;
+}
+EXPORT_SYMBOL(ab8540_gpio_config_vinsel);
+
+/*
* ab8500_gpio_config_select()
*
* Configure functionality of pin, either specific use or GPIO.
diff --git a/include/linux/mfd/abx500/ab8500-gpio.h b/include/linux/mfd/abx500/ab8500-gpio.h
index 48325db..20df07d 100644
--- a/include/linux/mfd/abx500/ab8500-gpio.h
+++ b/include/linux/mfd/abx500/ab8500-gpio.h
@@ -18,62 +18,37 @@ struct ab8500_gpio_platform_data {
int gpio_base;
u32 irq_base;
u8 config_reg[8];
- u8 config_direction[6];
- u8 config_pullups[6];
+ u8 config_direction[7];
+ u8 config_pullups[7];
+ u8 config_vinsel;
+ u8 config_pullupdown;
};
-enum ab8500_pin {
- AB8500_PIN_GPIO1 = 0,
- AB8500_PIN_GPIO2,
- AB8500_PIN_GPIO3,
- AB8500_PIN_GPIO4,
- AB8500_PIN_GPIO5,
- AB8500_PIN_GPIO6,
- AB8500_PIN_GPIO7,
- AB8500_PIN_GPIO8,
- AB8500_PIN_GPIO9,
- AB8500_PIN_GPIO10,
- AB8500_PIN_GPIO11,
- AB8500_PIN_GPIO12,
- AB8500_PIN_GPIO13,
- AB8500_PIN_GPIO14,
- AB8500_PIN_GPIO15,
- AB8500_PIN_GPIO16,
- AB8500_PIN_GPIO17,
- AB8500_PIN_GPIO18,
- AB8500_PIN_GPIO19,
- AB8500_PIN_GPIO20,
- AB8500_PIN_GPIO21,
- AB8500_PIN_GPIO22,
- AB8500_PIN_GPIO23,
- AB8500_PIN_GPIO24,
- AB8500_PIN_GPIO25,
- AB8500_PIN_GPIO26,
- AB8500_PIN_GPIO27,
- AB8500_PIN_GPIO28,
- AB8500_PIN_GPIO29,
- AB8500_PIN_GPIO30,
- AB8500_PIN_GPIO31,
- AB8500_PIN_GPIO32,
- AB8500_PIN_GPIO33,
- AB8500_PIN_GPIO34,
- AB8500_PIN_GPIO35,
- AB8500_PIN_GPIO36,
- AB8500_PIN_GPIO37,
- AB8500_PIN_GPIO38,
- AB8500_PIN_GPIO39,
- AB8500_PIN_GPIO40,
- AB8500_PIN_GPIO41,
- AB8500_PIN_GPIO42,
+enum ab8540_gpio_pull_updown {
+ AB8540_GPIO_PULL_DOWN = 0x0,
+ AB8540_GPIO_PULL_NONE = 0x1,
+ AB8540_GPIO_PULL_UP = 0x3,
+};
+
+enum ab8540_gpio_vinsel {
+ AB8540_GPIO_VINSEL_VBAT = 0x0,
+ AB8540_GPIO_VINSEL_VIN_1V8 = 0x1,
+ AB8540_GPIO_VINSEL_VDD_BIF = 0x2,
};
int ab8500_config_pulldown(struct device *dev,
- enum ab8500_pin gpio, bool enable);
+ int gpio, bool enable);
+
+int ab8540_config_pull_updown(struct device *dev,
+ int gpio, enum ab8540_gpio_pull_updown reg);
+
+int ab8540_gpio_config_vinsel(struct device *dev,
+ int gpio, enum ab8540_gpio_vinsel reg);
int ab8500_gpio_config_select(struct device *dev,
- enum ab8500_pin gpio, bool gpio_select);
+ int gpio, bool gpio_select);
int ab8500_gpio_config_get_select(struct device *dev,
- enum ab8500_pin gpio, bool *gpio_select);
+ int gpio, bool *gpio_select);
#endif /* _AB8500_GPIO_H */
--
1.7.9.5
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