From 4d86bf086009a4edfe747341e7cb83bf46e6f022 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C5=81ukasz=20Majewski?= <l.majewski@samsung.com>
Date: Mon, 26 Mar 2012 21:53:48 +0000
Subject: [PATCH] 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 <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
---
board/samsung/universal_c210/universal.c | 25 +++++++++++++++++++++---
include/max8998_pmic.h | 1 +
2 files changed, 23 insertions(+), 3 deletions(-)
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;
}
diff --git a/include/max8998_pmic.h b/include/max8998_pmic.h
index 10c892a51d..ca21f882c2 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)
--
2.39.5