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-rw-r--r--arch/arm/plat-samsung/gpio-config.c47
-rw-r--r--arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h11
2 files changed, 48 insertions, 10 deletions
diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c
index b732b773b9af..0aa32f242ee4 100644
--- a/arch/arm/plat-samsung/gpio-config.c
+++ b/arch/arm/plat-samsung/gpio-config.c
@@ -280,18 +280,17 @@ s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip,
}
#endif
-#ifdef CONFIG_S3C_GPIO_PULL_UP
-int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
- unsigned int off, s3c_gpio_pull_t pull)
+#if defined(CONFIG_S3C_GPIO_PULL_UP) || defined(CONFIG_S3C_GPIO_PULL_DOWN)
+static int s3c_gpio_setpull_1(struct s3c_gpio_chip *chip,
+ unsigned int off, s3c_gpio_pull_t pull,
+ s3c_gpio_pull_t updown)
{
void __iomem *reg = chip->base + 0x08;
u32 pup = __raw_readl(reg);
- pup = __raw_readl(reg);
-
- if (pup == S3C_GPIO_PULL_UP)
+ if (pull == updown)
pup &= ~(1 << off);
- else if (pup == S3C_GPIO_PULL_NONE)
+ else if (pull == S3C_GPIO_PULL_NONE)
pup |= (1 << off);
else
return -EINVAL;
@@ -300,17 +299,45 @@ int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
return 0;
}
-s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
- unsigned int off)
+static s3c_gpio_pull_t s3c_gpio_getpull_1(struct s3c_gpio_chip *chip,
+ unsigned int off, s3c_gpio_pull_t updown)
{
void __iomem *reg = chip->base + 0x08;
u32 pup = __raw_readl(reg);
pup &= (1 << off);
- return pup ? S3C_GPIO_PULL_NONE : S3C_GPIO_PULL_UP;
+ return pup ? S3C_GPIO_PULL_NONE : updown;
+}
+#endif /* CONFIG_S3C_GPIO_PULL_UP || CONFIG_S3C_GPIO_PULL_DOWN */
+
+#ifdef CONFIG_S3C_GPIO_PULL_UP
+s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ return s3c_gpio_getpull_1(chip, off, S3C_GPIO_PULL_UP);
+}
+
+int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
+ unsigned int off, s3c_gpio_pull_t pull)
+{
+ return s3c_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_UP);
}
#endif /* CONFIG_S3C_GPIO_PULL_UP */
+#ifdef CONFIG_S3C_GPIO_PULL_DOWN
+s3c_gpio_pull_t s3c_gpio_getpull_1down(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ return s3c_gpio_getpull_1(chip, off, S3C_GPIO_PULL_DOWN);
+}
+
+int s3c_gpio_setpull_1down(struct s3c_gpio_chip *chip,
+ unsigned int off, s3c_gpio_pull_t pull)
+{
+ return s3c_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_DOWN);
+}
+#endif /* CONFIG_S3C_GPIO_PULL_DOWN */
+
#ifdef CONFIG_S5P_GPIO_DRVSTR
s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin)
{
diff --git a/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h b/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h
index 8fd65d8b5863..0d2c5703f1ee 100644
--- a/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h
+++ b/arch/arm/plat-samsung/include/plat/gpio-cfg-helpers.h
@@ -210,6 +210,17 @@ extern s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
unsigned int off);
/**
+ * s3c_gpio_getpull_1down() - Get configuration for choice of down or none
+ * @chip: The gpio chip that the GPIO pin belongs to
+ * @off: The offset to the pin to get the configuration of.
+ *
+ * This helper function reads the state of the pull-down resistor for the
+ * given GPIO in the same case as s3c_gpio_setpull_1down.
+*/
+extern s3c_gpio_pull_t s3c_gpio_getpull_1down(struct s3c_gpio_chip *chip,
+ unsigned int off);
+
+/**
* s3c_gpio_setpull_s3c2443() - Pull configuration for s3c2443.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
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