From 812d7576cdbecc12d7eec7b533333d3a4a06234b Mon Sep 17 00:00:00 2001 From: Piotr Wilczek Date: Tue, 25 Jun 2013 09:59:47 +0200 Subject: [PATCH] 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 Signed-off-by: Kyungmin Park Acked-by: Rajeshwari Shinde Acked-by: Tom Rini Signed-off-by: Minkyu Kang --- drivers/power/pmic/pmic_max77686.c | 192 +++++++++++++++++++++++++++++ include/power/max77686_pmic.h | 26 ++++ 2 files changed, 218 insertions(+) diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c index 7208e5b679..d4c430e22e 100644 --- a/drivers/power/pmic/pmic_max77686.c +++ b/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"; diff --git a/include/power/max77686_pmic.h b/include/power/max77686_pmic.h index 91b7ba7bdb..c98db1b75d 100644 --- a/include/power/max77686_pmic.h +++ b/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 */ -- 2.25.1