drivers:power:max77686: add function to set voltage and mode

This patch add new functions to pmic max77686 to set voltage and mode.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Tom Rini <trini@ti.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

drivers/power/pmic/pmic_max77686.c

@@ -14,6 +14,198 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static const char max77686_buck_addr[] = {
+	0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
+};
+
+static unsigned int max77686_ldo_volt2hex(int ldo, ulong uV)
+{
+	unsigned int hex = 0;
+
+	switch (ldo) {
+	case 1:
+	case 2:
+	case 6:
+	case 7:
+	case 8:
+	case 15:
+		hex = (uV - 800000) / 25000;
+		break;
+	default:
+		hex = (uV - 800000) / 50000;
+	}
+
+	if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
+		return hex;
+
+	debug("%s: %ld is wrong voltage value for LDO%d\n", __func__, uV, ldo);
+	return 0;
+}
+
+int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV)
+{
+	unsigned int val, ret, hex, adr;
+
+	if (ldo < 1 && ldo > 26) {
+		printf("%s: %d is wrong ldo number\n", __func__, ldo);
+		return -1;
+	}
+
+	adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
+	hex = max77686_ldo_volt2hex(ldo, uV);
+
+	if (!hex)
+		return -1;
+
+	ret = pmic_reg_read(p, adr, &val);
+	if (ret)
+		return ret;
+
+	val &= ~MAX77686_LDO_VOLT_MASK;
+	val |= hex;
+	ret |= pmic_reg_write(p, adr, val);
+
+	return ret;
+}
+
+int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode)
+{
+	unsigned int val, ret, adr, mode;
+
+	if (ldo < 1 && 26 < ldo) {
+		printf("%s: %d is wrong ldo number\n", __func__, ldo);
+		return -1;
+	}
+
+	adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
+
+	/* mode */
+	switch (opmode) {
+	case OPMODE_OFF:
+		mode = MAX77686_LDO_MODE_OFF;
+		break;
+	case OPMODE_STANDBY:
+		switch (ldo) {
+		case 2:
+		case 6:
+		case 7:
+		case 8:
+		case 10:
+		case 11:
+		case 12:
+		case 14:
+		case 15:
+		case 16:
+			mode = MAX77686_LDO_MODE_STANDBY;
+			break;
+		default:
+			mode = 0xff;
+		}
+		break;
+	case OPMODE_LPM:
+		mode = MAX77686_LDO_MODE_LPM;
+		break;
+	case OPMODE_ON:
+		mode = MAX77686_LDO_MODE_ON;
+		break;
+	default:
+		mode = 0xff;
+	}
+
+	if (mode == 0xff) {
+		printf("%s: %d is not supported on LDO%d\n",
+		       __func__, opmode, ldo);
+		return -1;
+	}
+
+	ret = pmic_reg_read(p, adr, &val);
+	if (ret)
+		return ret;
+
+	val &= ~MAX77686_LDO_MODE_MASK;
+	val |= mode;
+	ret |= pmic_reg_write(p, adr, val);
+
+	return ret;
+}
+
+int max77686_set_buck_mode(struct pmic *p, int buck, char opmode)
+{
+	unsigned int val, ret, mask, adr, size, mode, mode_shift;
+
+	size = ARRAY_SIZE(max77686_buck_addr);
+	if (buck >= size) {
+		printf("%s: %d is wrong buck number\n", __func__, buck);
+		return -1;
+	}
+
+	adr = max77686_buck_addr[buck];
+
+	/* mask */
+	switch (buck) {
+	case 2:
+	case 3:
+	case 4:
+		mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
+		break;
+	default:
+		mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
+	}
+
+	mask = MAX77686_BUCK_MODE_MASK << mode_shift;
+
+	/* mode */
+	switch (opmode) {
+	case OPMODE_OFF:
+		mode = MAX77686_BUCK_MODE_OFF;
+		break;
+	case OPMODE_STANDBY:
+		switch (buck) {
+		case 1:
+		case 2:
+		case 3:
+		case 4:
+			mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
+			break;
+		default:
+			mode = 0xff;
+		}
+		break;
+	case OPMODE_LPM:
+		switch (buck) {
+		case 2:
+		case 3:
+		case 4:
+			mode = MAX77686_BUCK_MODE_LPM << mode_shift;
+			break;
+		default:
+			mode = 0xff;
+		}
+		break;
+	case OPMODE_ON:
+		mode = MAX77686_BUCK_MODE_ON << mode_shift;
+		break;
+	default:
+		mode = 0xff;
+	}
+
+	if (mode == 0xff) {
+		printf("%s: %d is not supported on BUCK%d\n",
+		       __func__, opmode, buck);
+		return -1;
+	}
+
+	ret = pmic_reg_read(p, adr, &val);
+	if (ret)
+		return ret;
+
+	val &= ~mask;
+	val |= mode;
+	ret |= pmic_reg_write(p, adr, val);
+
+	return ret;
+}
+
 int pmic_init(unsigned char bus)
 {
 	static const char name[] = "MAX77686_PMIC";

include/power/max77686_pmic.h

@@ -139,6 +139,32 @@ enum {
 	EN_LDO = (0x3 << 6),
 };
 
+enum {
+	OPMODE_OFF = 0,
+	OPMODE_STANDBY,
+	OPMODE_LPM,
+	OPMODE_ON,
+};
+
+int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV);
+int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode);
+int max77686_set_buck_mode(struct pmic *p, int buck, char opmode);
+
+#define MAX77686_LDO_VOLT_MAX_HEX	0x3f
+#define MAX77686_LDO_VOLT_MASK		0x3f
+#define MAX77686_LDO_MODE_MASK		0xc0
+#define MAX77686_LDO_MODE_OFF		(0x00 << 0x06)
+#define MAX77686_LDO_MODE_STANDBY	(0x01 << 0x06)
+#define MAX77686_LDO_MODE_LPM		(0x02 << 0x06)
+#define MAX77686_LDO_MODE_ON		(0x03 << 0x06)
+#define MAX77686_BUCK_MODE_MASK		0x03
+#define MAX77686_BUCK_MODE_SHIFT_1	0x00
+#define MAX77686_BUCK_MODE_SHIFT_2	0x04
+#define MAX77686_BUCK_MODE_OFF		0x00
+#define MAX77686_BUCK_MODE_STANDBY	0x01
+#define MAX77686_BUCK_MODE_LPM		0x02
+#define MAX77686_BUCK_MODE_ON		0x03
+
 /* Buck1 1 volt value */
 #define MAX77686_BUCK1OUT_1V	0x5
 /* Buck1 1.05 volt value */