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 l.majewski@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com Cc: Minkyu Kang mk7.kang@samsung.com --- 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)