1 files changed, 61 insertions, 0 deletions

diff --git a/arch/arm/plat-samsung/include/plat/gpio-cfg.h b/arch/arm/plat-samsung/include/plat/gpio-cfg.h
index 1762dcb4cb9..e750ec6fef2 100644
--- a/arch/arm/plat-samsung/include/plat/gpio-cfg.h
+++ b/arch/arm/plat-samsung/include/plat/gpio-cfg.h
@@ -26,6 +26,8 @@
 
 typedef unsigned int __bitwise__ s3c_gpio_pull_t;
 typedef unsigned int __bitwise__ s5p_gpio_drvstr_t;
+typedef unsigned int __bitwise__ s5p_gpio_pd_cfg_t;
+typedef unsigned int __bitwise__ s5p_gpio_pd_pull_t;
 
 /* forward declaration if gpio-core.h hasn't been included */
 struct s3c_gpio_chip;
@@ -207,6 +209,65 @@ extern s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin);
 */
 extern int s5p_gpio_set_drvstr(unsigned int pin, s5p_gpio_drvstr_t drvstr);
 
+/* Define values for the power down configuration available for each gpio pin.
+ *
+ * These values control the state of the power down configuration resistors
+ * available on most pins on the S5P series.
+ */
+#define S5P_GPIO_PD_OUTPUT0     ((__force s5p_gpio_pd_cfg_t)0x00)
+#define S5P_GPIO_PD_OUTPUT1     ((__force s5p_gpio_pd_cfg_t)0x01)
+#define S5P_GPIO_PD_INPUT       ((__force s5p_gpio_pd_cfg_t)0x02)
+#define S5P_GPIO_PD_PREV_STATE  ((__force s5p_gpio_pd_cfg_t)0x03)
+
+/**
+ * s5p_gpio_set_pd_cfg() - set the configuration of a gpio power down mode
+ * @pin: The pin number to configure the pull resistor.
+ * @pd_cfg: The configuration for the pwer down mode configuration register.
+ *
+ * This function sets the configuration of the power down mode resistor for the
+ * specified pin. It will return 0 if successful, or a negative error
+ * code if the pin cannot support the requested power down mode.
+ *
+*/
+extern int s5p_gpio_set_pd_cfg(unsigned int pin, s5p_gpio_pd_cfg_t pd_cfg);
+
+/**
+ * s5p_gpio_get_pd_cfg() - get the power down mode configuration of a gpio pin
+ * @pin: The pin number to get the settings for
+ *
+ * Read the power down mode resistor value for the specified pin.
+*/
+extern s5p_gpio_pd_cfg_t s5p_gpio_get_pd_cfg(unsigned int pin);
+
+/* Define values for the power down pull-{up,down} available for each gpio pin.
+ *
+ * These values control the state of the power down mode pull-{up,down}
+ * resistors available on most pins on the S5P series.
+ */
+#define S5P_GPIO_PD_UPDOWN_DISABLE      ((__force s5p_gpio_pd_pull_t)0x00)
+#define S5P_GPIO_PD_DOWN_ENABLE         ((__force s5p_gpio_pd_pull_t)0x01)
+#define S5P_GPIO_PD_UP_ENABLE           ((__force s5p_gpio_pd_pull_t)0x03)
+
+/**
+ * s5p_gpio_set_pd_pull() - set the pull-{up,down} of a gpio pin power down mode
+ * @pin: The pin number to configure the pull resistor.
+ * @pd_pull: The configuration for the power down mode pull resistor.
+ *
+ * This function sets the configuration of the pull-{up,down} resistor for the
+ * specified pin. It will return 0 if successful, or a negative error
+ * code if the pin cannot support the requested pull setting.
+ *
+*/
+extern int s5p_gpio_set_pd_pull(unsigned int pin, s5p_gpio_pd_pull_t pd_pull);
+
+/**
+ * s5p_gpio_get_pd_pull() - get the power down pull resistor config of gpio pin
+ * @pin: The pin number to get the settings for
+ *
+ * Read the power mode pull resistor value for the specified pin.
+*/
+extern s5p_gpio_pd_pull_t s5p_gpio_get_pd_pull(unsigned int pin);
+
 /**
  * s5p_register_gpio_interrupt() - register interrupt support for a gpio group
  * @pin: The pin number from the group to be registered