From 4d86bf086009a4edfe747341e7cb83bf46e6f022 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C5=81ukasz=20Majewski?= Date: Mon, 26 Mar 2012 21:53:48 +0000 Subject: ARM: Exynos4: ADC: Universal_C210: Enable LDO4 power line for ADC measurement 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 Signed-off-by: Kyungmin Park Cc: Minkyu Kang Signed-off-by: Minkyu Kang --- board/samsung/universal_c210/universal.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) (limited to 'board/samsung/universal_c210') diff --git a/board/samsung/universal_c210/universal.c b/board/samsung/universal_c210/universal.c index d0ff8341f6..90fff5cf5e 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 +109,27 @@ 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; + + ret = pmic_set_output(p, + MAX8998_REG_ONOFF1, + MAX8998_LDO4, !!on); + + 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 +152,8 @@ 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; } -- cgit v1.2.1