[U-Boot] [PATCH 3/4 V2] SMDK5250: Add PMIC voltage settings

[Rajeshwari Shinde]

This patch adds required pmic voltage settings for SMDK5250.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in V2:
	- Added  pmic_reg_update static function.
	- Added error check.
 board/samsung/smdk5250/smdk5250.c |  110 ++++++++++++++++++++++++++++++++++++-
 include/power/max77686_pmic.h     |   30 ++++++++++
 2 files changed, 138 insertions(+), 2 deletions(-)

diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
index 73c3ec0..9b0fe39 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -24,14 +24,17 @@
 #include <fdtdec.h>
 #include <asm/io.h>
 #include <i2c.h>
+#include <errno.h>
 #include <netdev.h>
 #include <spi.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/mmc.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch/power.h>
 #include <asm/arch/sromc.h>
 #include <power/pmic.h>
+#include <power/max77686_pmic.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -58,12 +61,115 @@ int dram_init(void)
 }
 
 #if defined(CONFIG_POWER)
+static int pmic_reg_update(struct pmic *p, int reg, uint regval)
+{
+	u32 val;
+	int ret = 0;
+
+	ret = pmic_reg_read(p, reg, &val);
+	if (ret) {
+		debug("%s: PMIC register read failed\n", __func__);
+		return -1;
+	}
+	val |= regval;
+	ret = pmic_reg_write(p, reg, val);
+	if (ret) {
+		debug("%s: PMIC register write failed\n", __func__);
+		return -1;
+	}
+	return 0;
+}
+
 int power_init_board(void)
 {
+	struct pmic *p;
+
+	power_ps_hold_setup();
+
+	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+
 	if (pmic_init(I2C_PMIC))
 		return -1;
-	else
-		return 0;
+
+	p = pmic_get("MAX77686_PMIC");
+	if (!p)
+		return -ENODEV;
+
+	if (pmic_probe(p))
+		return -1;
+
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_32KHZ, MAX77686_32KHCP_EN))
+		return -1;
+
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_BBAT,
+				(MAX77686_BBCHOSTEN | MAX77686_BBCVS_3_5V)))
+		return -1;
+
+	/* VDD_MIF */
+	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK1OUT,
+						MAX77686_BUCK1OUT_1V)) {
+		debug("%s: PMIC BUCK1OUT register write failed\n", __func__);
+		return -1;
+	}
+
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK1CRTL,
+						MAX77686_BUCK1CTRL_EN))
+		return -1;
+
+	/* VDD_ARM */
+	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK2DVS1,
+					MAX77686_BUCK2DVS1_1_3V)) {
+		debug("%s: PMIC BUCK2DVS1 register write failed\n", __func__);
+		return -1;
+	}
+
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK2CTRL1,
+					MAX77686_BUCK2CTRL_ON))
+		return -1;
+
+	/* VDD_INT */
+	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK3DVS1,
+					MAX77686_BUCK3DVS1_1_0125V)) {
+		debug("%s: PMIC BUCK3DVS1 register write failed\n", __func__);
+		return -1;
+	}
+
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK3CTRL,
+					MAX77686_BUCK3CTRL_ON))
+		return -1;
+
+	/* VDD_G3D */
+	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK4DVS1,
+					MAX77686_BUCK4DVS1_1_2V)) {
+		debug("%s: PMIC BUCK4DVS1 register write failed\n", __func__);
+		return -1;
+	}
+
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK4CTRL1,
+					MAX77686_BUCK3CTRL_ON))
+		return -1;
+
+	/* VDD_LDO2 */
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO2CTRL1,
+				(MAX77686_LD02CTRL1_1_5V | EN_LDO)))
+		return -1;
+
+	/* VDD_LDO3 */
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO3CTRL1,
+				(MAX77686_LD03CTRL1_1_8V | EN_LDO)))
+		return -1;
+
+	/* VDD_LDO5 */
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO5CTRL1,
+				(MAX77686_LD05CTRL1_1_8V | EN_LDO)))
+		return -1;
+
+	/* VDD_LDO10 */
+	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO10CTRL1,
+				(MAX77686_LD10CTRL1_1_8V | EN_LDO)))
+		return -1;
+
+	return 0;
 }
 #endif
 
diff --git a/include/power/max77686_pmic.h b/include/power/max77686_pmic.h
index d949ace..5b7b6ce 100644
--- a/include/power/max77686_pmic.h
+++ b/include/power/max77686_pmic.h
@@ -155,4 +155,34 @@ enum {
 	EN_LDO = (0x3 << 6),
 };
 
+/* Buck1 1 volt value */
+#define MAX77686_BUCK1OUT_1V	0x5
+#define MAX77686_BUCK1CTRL_EN	(3 << 0)
+/* Buck2 1.3 volt value */
+#define MAX77686_BUCK2DVS1_1_3V	0x38
+#define MAX77686_BUCK2CTRL_ON	(1 << 4)
+/* Buck3 1.0125 volt value */
+#define MAX77686_BUCK3DVS1_1_0125V	0x21
+#define MAX77686_BUCK3CTRL_ON	(1 << 4)
+/* Buck4 1.2 volt value */
+#define MAX77686_BUCK4DVS1_1_2V	0x30
+#define MAX77686_BUCK4CTRL_ON	(1 << 4)
+/* LDO2 1.5 volt value */
+#define MAX77686_LD02CTRL1_1_5V	0x1c
+/* LDO3 1.8 volt value */
+#define MAX77686_LD03CTRL1_1_8V	0x14
+/* LDO5 1.8 volt value */
+#define MAX77686_LD05CTRL1_1_8V	0x14
+/* LDO10 1.8 volt value */
+#define MAX77686_LD10CTRL1_1_8V	0x14
+/* MAX77686_REG_PMIC_32KHZ set to 32KH CP
+ * output is activated
+ */
+#define MAX77686_32KHCP_EN	(1 << 1)
+/* MAX77686_REG_PMIC_BBAT set to
+ * Back up batery charger on and
+ * limit voltage setting to 3.5v
+ */
+#define MAX77686_BBCHOSTEN	(1 << 0)
+#define MAX77686_BBCVS_3_5V	(3 << 3)
 #endif /* __MAX77686_PMIC_H_ */
-- 
1.7.4.4