i2c:gpio:s5p: I2C GPIO Software implementation (via soft_i2c)
This patch adds support for software I2C for GONI and Universal C210 reference targets.
It adds support for access to GPIOs by number, not as it is present,
by bank and offset.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Cc: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/include/asm/arch-s5pc2xx/gpio.h b/arch/arm/include/asm/arch-s5pc2xx/gpio.h
index 8db5895..8be620c 100644
--- a/arch/arm/include/asm/arch-s5pc2xx/gpio.h
+++ b/arch/arm/include/asm/arch-s5pc2xx/gpio.h
@@ -88,6 +88,35 @@
void s5p_gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode);
void s5p_gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode);
void s5p_gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode);
+
+/* GPIO pins per bank */
+#define GPIO_PER_BANK 8
+
+#define s5pc210_gpio_part1_get_nr(bank, pin) \
+ ((((((unsigned int) &(((struct s5pc210_gpio_part1 *) \
+ S5PC210_GPIO_PART1_BASE)->bank)) \
+ - S5PC210_GPIO_PART1_BASE) / sizeof(struct s5p_gpio_bank)) \
+ * GPIO_PER_BANK) + pin)
+
+#define GPIO_PART1_MAX ((sizeof(struct s5pc210_gpio_part1) \
+ / sizeof(struct s5p_gpio_bank)) * GPIO_PER_BANK)
+
+#define s5pc210_gpio_part2_get_nr(bank, pin) \
+ (((((((unsigned int) &(((struct s5pc210_gpio_part2 *) \
+ S5PC210_GPIO_PART2_BASE)->bank)) \
+ - S5PC210_GPIO_PART2_BASE) / sizeof(struct s5p_gpio_bank)) \
+ * GPIO_PER_BANK) + pin) + GPIO_PART1_MAX)
+
+static inline unsigned int s5p_gpio_base(int nr)
+{
+ if (nr < GPIO_PART1_MAX)
+ return S5PC210_GPIO_PART1_BASE;
+ else
+ return S5PC210_GPIO_PART2_BASE;
+
+ return 0;
+}
+
#endif
/* Pin configurations */