From: Jeong-Hyeon Kim jhkim@insignal.co.kr
This patch adds pinmux support for UART channels
Signed-off-by: Jeong-Hyeon Kim jhkim@insignal.co.kr --- arch/arm/cpu/armv7/exynos/pinmux.c | 41 ++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+)
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c index f02f441..364ee2a 100644 --- a/arch/arm/cpu/armv7/exynos/pinmux.c +++ b/arch/arm/cpu/armv7/exynos/pinmux.c @@ -366,6 +366,41 @@ static int exynos4_mmc_config(int peripheral, int flags) return 0; }
+static void exynos4_uart_config(int peripheral) +{ + struct exynos4_gpio_part1 *gpio1 = + (struct exynos4_gpio_part1 *) samsung_get_base_gpio_part1(); + struct s5p_gpio_bank *bank; + int i, start, count; + + switch (peripheral) { + case PERIPH_ID_UART0: + bank = &gpio1->a0; + start = 0; + count = 4; + break; + case PERIPH_ID_UART1: + bank = &gpio1->a0; + start = 4; + count = 4; + break; + case PERIPH_ID_UART2: + bank = &gpio1->a1; + start = 0; + count = 4; + break; + case PERIPH_ID_UART3: + bank = &gpio1->a1; + start = 4; + count = 2; + break; + } + for (i = start; i < start + count; i++) { + s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE); + s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2)); + } +} + static int exynos4_pinmux_config(int peripheral, int flags) { switch (peripheral) { @@ -377,6 +412,12 @@ static int exynos4_pinmux_config(int peripheral, int flags) case PERIPH_ID_SDMMC4: printf("SDMMC device %d not implemented\n", peripheral); return -1; + case PERIPH_ID_UART0: + case PERIPH_ID_UART1: + case PERIPH_ID_UART2: + case PERIPH_ID_UART3: + exynos4_uart_config(peripheral); + break; default: debug("%s: invalid peripheral %d", __func__, peripheral); return -1;