[U-Boot] [PATCH 3/6 v2] arm:exynos4:pinmux: Modify the gpio function for mmc
Piotr Wilczek
p.wilczek at samsung.com
Thu Aug 23 14:01:17 CEST 2012
This patch add pinmux settings for Exynos4 for mmc0 and mmc2
Signed-off-by: Piotr Wilczek <p.wilczek at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
CC: Minkyu Kang <mk7.kang at samsung.com>
---
Changes for v2:
- mmc initialisation code moved to pinmux instead of creating a new common code file
arch/arm/cpu/armv7/exynos/pinmux.c | 56 +++++++++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/periph.h | 1 +
2 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
index d2b7d2c..84ee05c 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -209,10 +209,66 @@ static int exynos5_pinmux_config(int peripheral, int flags)
return 0;
}
+static int exynos4_mmc_config(int peripheral, int flags)
+{
+ struct exynos4_gpio_part2 *gpio2 =
+ (struct exynos4_gpio_part2 *)samsung_get_base_gpio_part2();
+ struct s5p_gpio_bank *bank, *bank_ext;
+ int i;
+
+ switch (peripheral) {
+ case PERIPH_ID_SDMMC0:
+ bank = &gpio2->k0;
+ bank_ext = &gpio2->k1;
+ break;
+ case PERIPH_ID_SDMMC2:
+ bank = &gpio2->k2;
+ bank_ext = &gpio2->k3;
+ break;
+ }
+ for (i = 0; i < 7; i++) {
+ if (i == 2)
+ continue;
+ s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
+ s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
+ s5p_gpio_set_drv(bank, i, GPIO_DRV_4X);
+ }
+ if (flags & PINMUX_FLAG_8BIT_MODE) {
+ for (i = 3; i < 7; i++) {
+ s5p_gpio_cfg_pin(bank_ext, i, GPIO_FUNC(0x3));
+ s5p_gpio_set_pull(bank_ext, i, GPIO_PULL_NONE);
+ s5p_gpio_set_drv(bank_ext, i, GPIO_DRV_4X);
+ }
+ }
+
+ return 0;
+}
+
+static int exynos4_pinmux_config(int peripheral, int flags)
+{
+ switch (peripheral) {
+ case PERIPH_ID_SDMMC0:
+ case PERIPH_ID_SDMMC2:
+ return exynos4_mmc_config(peripheral, flags);
+ case PERIPH_ID_SDMMC1:
+ case PERIPH_ID_SDMMC3:
+ case PERIPH_ID_SDMMC4:
+ printf("SDMMC device %d not implemented\n", peripheral);
+ return -1;
+ default:
+ debug("%s: invalid peripheral %d", __func__, peripheral);
+ return -1;
+ }
+
+ return 0;
+}
+
int exynos_pinmux_config(int peripheral, int flags)
{
if (cpu_is_exynos5())
return exynos5_pinmux_config(peripheral, flags);
+ else if (cpu_is_exynos4())
+ return exynos4_pinmux_config(peripheral, flags);
else {
debug("pinmux functionality not supported\n");
return -1;
diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h
index 5db25aa..4e1da82 100644
--- a/arch/arm/include/asm/arch-exynos/periph.h
+++ b/arch/arm/include/asm/arch-exynos/periph.h
@@ -34,6 +34,7 @@ enum periph_id {
PERIPH_ID_SDMMC1,
PERIPH_ID_SDMMC2,
PERIPH_ID_SDMMC3,
+ PERIPH_ID_SDMMC4,
PERIPH_ID_SROMC,
PERIPH_ID_UART0,
PERIPH_ID_UART1,
--
1.7.5.4
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