dm: pmic: add max77686 pmic driver

[u-boot] / drivers / power / pmic / pmic_max77686.c

diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c
index df1fd91de385ebbdd8c4f066f4ec960275ad4f94..1ad810acc266cb41cfbc5071c633c464d6418865 100644 (file)
--- a/drivers/power/pmic/pmic_max77686.c
+++ b/drivers/power/pmic/pmic_max77686.c
@@ -42,11 +42,30 @@ static unsigned int max77686_ldo_volt2hex(int ldo, ulong uV)
        return 0;
 }
 
+static int max77686_buck_volt2hex(int buck, ulong uV)
+{
+       int hex = 0;
+
+       if (buck < 5 || buck > 9) {
+               debug("%s: buck %d is not supported\n", __func__, buck);
+               return -EINVAL;
+       }
+
+       hex = (uV - 750000) / 50000;
+
+       if (hex >= 0 && hex <= MAX77686_BUCK_VOLT_MAX_HEX)
+               return hex;
+
+       debug("%s: %ld is wrong voltage value for BUCK%d\n",
+             __func__, uV, buck);
+       return -EINVAL;
+}
+
 int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV)
 {
        unsigned int val, ret, hex, adr;
 
-       if (ldo < 1 && ldo > 26) {
+       if (ldo < 1 || ldo > 26) {
                printf("%s: %d is wrong ldo number\n", __func__, ldo);
                return -1;
        }
@@ -68,11 +87,38 @@ int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV)
        return ret;
 }
 
+int max77686_set_buck_voltage(struct pmic *p, int buck, ulong uV)
+{
+       unsigned int val, adr;
+       int hex, ret;
+
+       if (buck < 5 || buck > 9) {
+               printf("%s: %d is an unsupported bucket number\n",
+                      __func__, buck);
+               return -EINVAL;
+       }
+
+       adr = max77686_buck_addr[buck] + 1;
+       hex = max77686_buck_volt2hex(buck, uV);
+
+       if (hex < 0)
+               return hex;
+
+       ret = pmic_reg_read(p, adr, &val);
+       if (ret)
+               return ret;
+
+       val &= ~MAX77686_BUCK_VOLT_MASK;
+       ret |= pmic_reg_write(p, adr, val | hex);
+
+       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) {
+       if (ldo < 1 || 26 < ldo) {
                printf("%s: %d is wrong ldo number\n", __func__, ldo);
                return -1;
        }
@@ -157,7 +203,7 @@ int max77686_set_buck_mode(struct pmic *p, int buck, char opmode)
        /* mode */
        switch (opmode) {
        case OPMODE_OFF:
-               mode = MAX77686_BUCK_MODE_OFF;
+               mode = MAX77686_BUCK_MODE_OFF << mode_shift;
                break;
        case OPMODE_STANDBY:
                switch (buck) {
@@ -249,7 +295,7 @@ int pmic_init(unsigned char bus)
 
        p->name = name;
        p->interface = PMIC_I2C;
-       p->number_of_regs = PMIC_NUM_OF_REGS;
+       p->number_of_regs = MAX77686_NUM_OF_REGS;
        p->hw.i2c.tx_num = 1;
 
        puts("Board PMIC init\n");