This patch enables LDO4 power line for preparing proper voltages to be measured by ADC converter. This measurement is used for determination of target board HW revision.
Test HW: Universal_C210 (Exynos4210) rev. 0.0 Signed-off-by: Lukasz Majewski <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> Cc: Minkyu Kang <[email protected]> --- board/samsung/universal_c210/universal.c | 30 +++++++++++++++++++++++++++--- include/max8998_pmic.h | 1 + 2 files changed, 28 insertions(+), 3 deletions(-) diff --git a/board/samsung/universal_c210/universal.c b/board/samsung/universal_c210/universal.c index d0ff834..f166c3e 100644 --- a/board/samsung/universal_c210/universal.c +++ b/board/samsung/universal_c210/universal.c @@ -58,13 +58,13 @@ int board_init(void) gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210; gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100; - check_hw_revision(); - printf("HW Revision:\t0x%x\n", board_rev); - #if defined(CONFIG_PMIC) pmic_init(); #endif + check_hw_revision(); + printf("HW Revision:\t0x%x\n", board_rev); + return 0; } @@ -109,10 +109,32 @@ static unsigned short get_adc_value(int channel) return ret; } +static int adc_power_control(int on) +{ + int ret; + struct pmic *p = get_pmic(); + + if (pmic_probe(p)) + return -1; + + if (on) + ret = pmic_set_output(p, + MAX8998_REG_ONOFF1, + MAX8998_LDO4, LDO_ON); + else + ret = pmic_set_output(p, + MAX8998_REG_ONOFF1, + MAX8998_LDO4, LDO_OFF); + + return ret; +} + static unsigned int get_hw_revision(void) { int hwrev, mode0, mode1; + adc_power_control(1); + mode0 = get_adc_value(1); /* HWREV_MODE0 */ mode1 = get_adc_value(2); /* HWREV_MODE1 */ @@ -135,6 +157,8 @@ static unsigned int get_hw_revision(void) debug("mode0: %d, mode1: %d, hwrev 0x%x\n", mode0, mode1, hwrev); + adc_power_control(0); + return hwrev; } diff --git a/include/max8998_pmic.h b/include/max8998_pmic.h index 10c892a..ca21f88 100644 --- a/include/max8998_pmic.h +++ b/include/max8998_pmic.h @@ -75,6 +75,7 @@ enum { }; #define MAX8998_LDO3 (1 << 2) +#define MAX8998_LDO4 (1 << 1) #define MAX8998_LDO8 (1 << 5) #define MAX8998_SAFEOUT1 (1 << 4) -- 1.7.2.3 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
