To use the sd-card, VTF_2.8V will be enabled. Before this patch, VTF_2.8V is always disabled.(card can't initialize.) When card is detected, SD-card power will enable with sd_ldo_control().
Signed-off-by: Jaehoon Chung jh80.chung@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com --- board/samsung/trats/trats.c | 38 ++++++++++++++++++++++++++++++++------ 1 file changed, 32 insertions(+), 6 deletions(-)
diff --git a/board/samsung/trats/trats.c b/board/samsung/trats/trats.c index 7f61d17..9b6dd12 100644 --- a/board/samsung/trats/trats.c +++ b/board/samsung/trats/trats.c @@ -408,11 +408,31 @@ int checkboard(void) #endif
#ifdef CONFIG_GENERIC_MMC +static int sd_ldo_control(int on) +{ + struct pmic *p = pmic_get("MAX8997_PMIC"); + u32 val = 0; + int ret = 0; + if (pmic_probe(p)) + return -1; + + /* LDO17 VTF: 2.8V */ + val = max8997_reg_ldo(2800000) | (on? EN_LDO : DIS_LDO); + ret |= pmic_reg_write(p, MAX8997_REG_LDO17CTRL, val); + + if (ret) { + puts("MAX8997 SD setting error!\n"); + return -1; + } + + return 0; +} + int board_mmc_init(bd_t *bis) { struct exynos4_gpio_part2 *gpio = (struct exynos4_gpio_part2 *)samsung_get_base_gpio_part2(); - int err; + int err, err_sd = 0;
/* eMMC_EN: SD_0_CDn: GPK0[2] Output High */ s5p_gpio_direction_output(&gpio->k0, 2, 1); @@ -438,14 +458,20 @@ int board_mmc_init(bd_t *bis) * GPX3[4] T-flash detect pin */ if (!s5p_gpio_get_value(&gpio->x3, 4)) { - err = exynos_pinmux_config(PERIPH_ID_SDMMC2, PINMUX_FLAG_NONE); - if (err) + err_sd = exynos_pinmux_config(PERIPH_ID_SDMMC2, PINMUX_FLAG_NONE); + if (err_sd) debug("SDMMC2 not configured\n"); - else - err = s5p_mmc_init(2, 4); + else { + if (!sd_ldo_control(1)) { + err_sd = s5p_mmc_init(2, 4); + if (err_sd) { + sd_ldo_control(0); + } + } + } }
- return err; + return err & err_sd; } #endif