pmic:pfuze support buck regulator mode switch

index 1118489..41aa3c4 100644
@@ -16,14 +16,34 @@ enum {
 
 	PFUZE100_SW1ABVOL	= 0x20,
 	PFUZE100_SW1ABSTBY	= 0x21,
+	PFUZE100_SW1ABOFF	= 0x22,
+	PFUZE100_SW1ABMODE	= 0x23,
 	PUZE_100_SW1ABCONF	= 0x24,
 	PFUZE100_SW1CVOL	= 0x2e,
 	PFUZE100_SW1CSTBY	= 0x2f,
+	PFUZE100_SW1COFF	= 0x30,
+	PFUZE100_SW1CMODE	= 0x31,
 	PFUZE100_SW1CCONF	= 0x32,
 	PFUZE100_SW2VOL		= 0x35,
+	PFUZE100_SW2STBY	= 0x36,
+	PFUZE100_SW2OFF		= 0x37,
+	PFUZE100_SW2MODE	= 0x38,
+	PFUZE100_SW2CONF	= 0x39,
 	PFUZE100_SW3AVOL	= 0x3c,
+	PFUZE100_SW3ASTBY	= 0x3D,
+	PFUZE100_SW3AOFF	= 0x3E,
+	PFUZE100_SW3AMODE	= 0x3F,
+	PFUZE100_SW3ACONF	= 0x40,
 	PFUZE100_SW3BVOL	= 0x43,
+	PFUZE100_SW3BSTBY	= 0x44,
+	PFUZE100_SW3BOFF	= 0x45,
+	PFUZE100_SW3BMODE	= 0x46,
+	PFUZE100_SW3BCONF	= 0x47,
 	PFUZE100_SW4VOL		= 0x4a,
+	PFUZE100_SW4STBY	= 0x4b,
+	PFUZE100_SW4OFF		= 0x4c,
+	PFUZE100_SW4MODE	= 0x4d,
+	PFUZE100_SW4CONF	= 0x4e,
 	PFUZE100_SWBSTCON1	= 0x66,
 	PFUZE100_VREFDDRCON	= 0x6a,
 	PFUZE100_VSNVSVOL	= 0x6b,

@@ -177,5 +197,40 @@ enum {
 #define SWBST_MODE_AUTO	(2 << 2)
 #define SWBST_MODE_APS	(2 << 3)
 
+/*
+ * Regulator Mode Control
+ *
+ * OFF: The regulator is switched off and the output voltage is discharged.
+ * PFM: In this mode, the regulator is always in PFM mode, which is useful
+ *     @light loads for optimized efficiency.
+ * PWM: In this mode, the regulator is always in PWM mode operation
+ *	regardless of load conditions.
+ * APS: In this mode, the regulator moves automatically between pulse
+ *	skipping mode and PWM mode depending on load conditions.
+ *
+ * SWxMODE[3:0]
+ * Normal Mode  |  Standby Mode	|      value
+ *   OFF		OFF		0x0
+ *   PWM		OFF		0x1
+ *   PFM		OFF		0x3
+ *   APS		OFF		0x4
+ *   PWM		PWM		0x5
+ *   PWM		APS		0x6
+ *   APS		APS		0x8
+ *   APS		PFM		0xc
+ *   PWM		PFM		0xd
+ */
+#define OFF_OFF		0x0
+#define PWM_OFF		0x1
+#define PFM_OFF		0x3
+#define APS_OFF		0x4
+#define PWM_PWM		0x5
+#define PWM_APS		0x6
+#define APS_APS		0x8
+#define APS_PFM		0xc
+#define PWM_PFM		0xd
+
+#define SWITCH_SIZE	0x7
+
 int power_pfuze100_init(unsigned char bus);
 #endif

index 2cd1794..4980bf7 100644
@@ -5,9 +5,47 @@
  */
 
 #include <common.h>
+#include <errno.h>
 #include <power/pmic.h>
 #include <power/pfuze100_pmic.h>
 
+int pfuze_mode_init(struct pmic *p, u32 mode)
+{
+	unsigned char offset, i, switch_num;
+	u32 id, ret;
+
+	pmic_reg_read(p, PFUZE100_DEVICEID, &id);
+	id = id & 0xf;
+
+	if (id == 0) {
+		switch_num = 6;
+		offset = PFUZE100_SW1CMODE;
+	} else if (id == 1) {
+		switch_num = 4;
+		offset = PFUZE100_SW2MODE;
+	} else {
+		printf("Not supported, id=%d\n", id);
+		return -EINVAL;
+	}
+
+	ret = pmic_reg_write(p, PFUZE100_SW1ABMODE, mode);
+	if (ret < 0) {
+		printf("Set SW1AB mode error!\n");
+		return ret;
+	}
+
+	for (i = 0; i < switch_num - 1; i++) {
+		ret = pmic_reg_write(p, offset + i * SWITCH_SIZE, mode);
+		if (ret < 0) {
+			printf("Set switch 0x%x mode error!\n",
+			       offset + i * SWITCH_SIZE);
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
 struct pmic *pfuze_common_init(unsigned char i2cbus)
 {
 	struct pmic *p;

index 7a4126c..53cfc99 100644
@@ -8,5 +8,6 @@
 #define __PFUZE_BOARD_HELPER__
 
 struct pmic *pfuze_common_init(unsigned char i2cbus);
+int pfuze_mode_init(struct pmic *p, u32 mode);
 
 #endif

index 59387ff..b12e74e 100644
@@ -29,6 +29,7 @@
 #include <asm/arch/crm_regs.h>
 #include <pca953x.h>
 #include <power/pmic.h>
+#include <power/pfuze100_pmic.h>
 #include "../common/pfuze.h"
 
 DECLARE_GLOBAL_DATA_PTR;

@@ -515,11 +516,16 @@ int board_spi_cs_gpio(unsigned bus, unsigned cs)
 int power_init_board(void)
 {
 	struct pmic *p;
+	unsigned int ret;
 
 	p = pfuze_common_init(I2C_PMIC);
 	if (!p)
 		return -ENODEV;
 
+	ret = pfuze_mode_init(p, APS_PFM);
+	if (ret < 0)
+		return ret;
+
 	return 0;
 }
 

index 2f7198d..bb2dd96 100644
@@ -631,12 +631,16 @@ int board_init(void)
 int power_init_board(void)
 {
 	struct pmic *p;
-	unsigned int reg;
+	unsigned int reg, ret;
 
 	p = pfuze_common_init(I2C_PMIC);
 	if (!p)
 		return -ENODEV;
 
+	ret = pfuze_mode_init(p, APS_PFM);
+	if (ret < 0)
+		return ret;
+
 	/* Increase VGEN3 from 2.5 to 2.8V */
 	pmic_reg_read(p, PFUZE100_VGEN3VOL, &reg);
 	reg &= ~LDO_VOL_MASK;

index a2c9aae..2ff960e 100644
@@ -199,12 +199,16 @@ static struct i2c_pads_info i2c_pad_info1 = {
 int power_init_board(void)
 {
 	struct pmic *p;
-	unsigned int reg;
+	unsigned int reg, ret;
 
 	p = pfuze_common_init(I2C_PMIC);
 	if (!p)
 		return -ENODEV;
 
+	ret = pfuze_mode_init(p, APS_PFM);
+	if (ret < 0)
+		return ret;
+
 	/* Enable power of VGEN5 3V3, needed for SD3 */
 	pmic_reg_read(p, PFUZE100_VGEN5VOL, &reg);
 	reg &= ~LDO_VOL_MASK;