Dear Beomho Seo,
On 03/14/2014 09:33 AM, Beomho Seo wrote:
For use dwmmc controller at exynos4, add SDMMC gpio configuration.
In case SDMMC2, do not use 8bit mode at exynos4.
Signed-off-by: Beomho Seo <beomho....@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.ch...@samsung.com>
Cc: Lukasz Majewski <l.majew...@samsung.com>
Cc: Piotr Wilczek <p.wilc...@samsung.com>
Cc: Minkyu Kang <mk7.k...@samsung.com>
---
Changes for v2:
- Fixed value initialise.
- Comment add in function.
arch/arm/cpu/armv7/exynos/pinmux.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c
b/arch/arm/cpu/armv7/exynos/pinmux.c
index 9edb475..3dce5d2 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -632,16 +632,26 @@ 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;
+ unsigned int func, func_ext;
int i;
switch (peripheral) {
case PERIPH_ID_SDMMC0:
bank = &gpio2->k0;
bank_ext = &gpio2->k1;
+ func = GPIO_FUNC(0x2);
+ func_ext = GPIO_FUNC(0x3);
break;
case PERIPH_ID_SDMMC2:
bank = &gpio2->k2;
- bank_ext = &gpio2->k3;
that causes warning 'bank_ext' may be used uninitialized in this function
+ func = GPIO_FUNC(0x2);
+ func_ext = 0;
+ break;
+ case PERIPH_ID_SDMMC4:
+ bank = &gpio2->k0;
+ bank_ext = &gpio2->k1;
+ func = GPIO_FUNC(0x3);
+ func_ext = GPIO_FUNC(0x4);
break;
default:
return -1;
@@ -649,13 +659,14 @@ static int exynos4_mmc_config(int peripheral, int flags)
for (i = 0; i < 7; i++) {
if (i == 2)
continue;
- s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
+ s5p_gpio_cfg_pin(bank, i, func);
s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
s5p_gpio_set_drv(bank, i, GPIO_DRV_4X);
}
+ /* SDMMC do not use 8bit mode at exynos4 */
if (flags & PINMUX_FLAG_8BIT_MODE) {
for (i = 3; i < 7; i++) {
- s5p_gpio_cfg_pin(bank_ext, i, GPIO_FUNC(0x3));
+ s5p_gpio_cfg_pin(bank_ext, i, func_ext);
s5p_gpio_set_pull(bank_ext, i, GPIO_PULL_NONE);
s5p_gpio_set_drv(bank_ext, i, GPIO_DRV_4X);
}
@@ -722,10 +733,10 @@ static int exynos4_pinmux_config(int peripheral, int
flags)
break;
case PERIPH_ID_SDMMC0:
case PERIPH_ID_SDMMC2:
+ case PERIPH_ID_SDMMC4:
return exynos4_mmc_config(peripheral, flags);
case PERIPH_ID_SDMMC1:
case PERIPH_ID_SDMMC3:
- case PERIPH_ID_SDMMC4:
debug("SDMMC device %d not implemented\n", peripheral);
return -1;
default:
Best regards,
Piotr Wilczek
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