On Mon, Apr 15, 2013 at 11:34 AM, Bernie Thompson
<bhthomp...@chromium.org> wrote:
> Some Exynos5250 silicon may require 1.05v on the MIF to be stable, so to be
> safe we can default to 1.05v instead of 1.00v. This can be set optimally later
> in the boot process by the kernel.
>
> The 0x6 value for 1.05v comes from the MAX77686 datasheet.
>
> Signed-off-by: Bernie Thompson <bhthomp...@chromium.org>
Acked-by: Simon Glass <s...@chromium.org>
> ---
> board/samsung/smdk5250/smdk5250.c | 2 +-
> include/power/max77686_pmic.h | 2 ++
> 2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/board/samsung/smdk5250/smdk5250.c
> b/board/samsung/smdk5250/smdk5250.c
> index 217c6df..2cea844 100644
> --- a/board/samsung/smdk5250/smdk5250.c
> +++ b/board/samsung/smdk5250/smdk5250.c
> @@ -182,7 +182,7 @@ int power_init_board(void)
>
> /* VDD_MIF */
> if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK1OUT,
> - MAX77686_BUCK1OUT_1V)) {
> + MAX77686_BUCK1OUT_1_05V)) {
> debug("%s: PMIC %d register write failed\n", __func__,
> MAX77686_REG_PMIC_BUCK1OUT);
> return -1;
> diff --git a/include/power/max77686_pmic.h b/include/power/max77686_pmic.h
> index fdc7ca9..1c374a9 100644
> --- a/include/power/max77686_pmic.h
> +++ b/include/power/max77686_pmic.h
> @@ -157,6 +157,8 @@ enum {
>
> /* Buck1 1 volt value */
> #define MAX77686_BUCK1OUT_1V 0x5
> +/* Buck1 1.05 volt value */
> +#define MAX77686_BUCK1OUT_1_05V 0x6
> #define MAX77686_BUCK1CTRL_EN (3 << 0)
> /* Buck2 1.3 volt value */
> #define MAX77686_BUCK2DVS1_1_3V 0x38
> --
> 1.8.1.3
>
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