Gabe Black (gabeblack@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3649
-gerrit
commit de979e0a987ab0583a67218cee2ceba980e298b0 Author: Gabe Black gabeblack@google.com Date: Sat May 18 15:52:01 2013 -0700
exynos5250: When enabling the I2S pins, turn off pull ups/downs.
These pins will be driven by the internal controller which shouldn't have pull ups or downs in the pin fighting with them.
Change-Id: I579aed84ace45d8f5f1d3ca64c064d98de842b57 Signed-off-by: Gabe Black gabeblack@chromium.org --- src/cpu/samsung/exynos5250/pinmux.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/cpu/samsung/exynos5250/pinmux.c b/src/cpu/samsung/exynos5250/pinmux.c index 6991dfc..9a473d0 100644 --- a/src/cpu/samsung/exynos5250/pinmux.c +++ b/src/cpu/samsung/exynos5250/pinmux.c @@ -286,8 +286,10 @@ int exynos_pinmux_config(enum periph_id peripheral, int flags) gpio_set_pull(GPIO_X07, GPIO_PULL_NONE); break; case PERIPH_ID_I2S1: - for (i = 0; i < 5; i++) + for (i = 0; i < 5; i++) { gpio_cfg_pin(GPIO_B00 + i, GPIO_FUNC(0x02)); + gpio_set_pull(GPIO_B00 + i, GPIO_PULL_NONE); + } break; default: printk(BIOS_DEBUG, "%s: invalid peripheral %d", __func__, peripheral);