Reuse TPS65941 regulator driver to adds support for TPS65224 PMIC's regulators. 4 BUCKs and 3 LDOs, where BUCK1 and BUCK2 can be configured in dual phase mode.
Signed-off-by: Bhargav Raviprakash bhargav.r@ltts.com --- drivers/power/regulator/tps65941_regulator.c | 283 ++++++++++++++++++- 1 file changed, 270 insertions(+), 13 deletions(-)
diff --git a/drivers/power/regulator/tps65941_regulator.c b/drivers/power/regulator/tps65941_regulator.c index d879c2301b..b1b9462fd3 100644 --- a/drivers/power/regulator/tps65941_regulator.c +++ b/drivers/power/regulator/tps65941_regulator.c @@ -37,6 +37,8 @@
#define TPS65941_BUCK_CONV_OPS_IDX 0 #define TPS65941_LDO_CONV_OPS_IDX 0 +#define TPS65224_LDO_CONV_OPS_IDX 1 +#define TPS65224_BUCK_CONV_OPS_IDX 1
struct tps65941_reg_conv_ops { int volt_mask; @@ -55,6 +57,11 @@ static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F, static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25, 0x26};
+static inline int tps65941_get_chip_id(struct udevice *dev) +{ + return dev->parent->driver_data; +} + static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable) { int ret; @@ -146,6 +153,112 @@ int tps65941_lookup_slew(int id) } }
+static int tps65224_buck_volt2val(int idx, int uV) +{ + /* This functions maps a value which is in micro Volts to the VSET value. + * The mapping is as per the datasheet of TPS65224. + */ + + if (uV > TPS65224_BUCK_VOLT_MAX) + return -EINVAL; + + if (idx > 0) { + /* Buck2, Buck3 and Buck4 of TPS65224 has a different schema in + * converting b/w micro_volt and VSET hex values + * + * VSET value starts from 0x00 for 0.5V, and for every increment + * in VSET value the output voltage increases by 25mV. This is upto + * 1.15V where VSET is 0x1A. + * + * For 0x1B the output voltage is 1.2V, and for every increment of + * VSET the output voltage increases by 50mV upto the max voltage of + * 3.3V + * + * | Voltage Ranges | VSET Ranges | Voltage Step | + * +-----------------+--------------+--------------+ + * | 0.5V to 1.50V | 0x00 to 0x1A | 25mV | + * | 1.2V to 3.3V | 0x1B to 0x45 | 50mV | + */ + if (uV >= 1200000) + return (uV - 1200000) / 50000 + 0x1B; + else if (uV >= 500000) + return (uV - 500000) / 25000; + else + return -EINVAL; + } + + /* Buck1 and Buck12(dual phase) has a different mapping b/w output + * voltage and VSET value. + * + * | Voltage Ranges | VSET Ranges | Voltage Step | + * +-----------------+--------------+--------------+ + * | 0.5V to 0.58V | 0xA to 0xE | 20mV | + * | 0.6V to 1.095V | 0xF to 0x72 | 5mV | + * | 1.1V to 1.65V | 0x73 to 0xAA | 10mV | + * | 1.6V to 3.3V | 0xAB to 0xFD | 20mV | + * + */ + if (uV >= 1660000) + return (uV - 1660000) / 20000 + 0xAB; + else if (uV >= 1100000) + return (uV - 1100000) / 10000 + 0x73; + else if (uV >= 600000) + return (uV - 600000) / 5000 + 0x0F; + else if (uV >= 500000) + return (uV - 500000) / 20000 + 0x0A; + else + return -EINVAL; +} + +static int tps65224_buck_val2volt(int idx, int val) +{ + /* This function does the opposite to the tps65224_buck_volt2val function + * described above. + * This maps the VSET value to micro volts. Please refer to the ranges + * mentioned the comments of tps65224_buck_volt2val. + */ + + if (idx > 0) { + if (val > TPS65224_BUCK234_VOLT_MAX_HEX) + return -EINVAL; + else if (val >= 0x1B) + return 1200000 + (val - 0x1B) * 50000; + else if (val >= 0x00) + return 500000 + (val - 0x00) * 25000; + else + return -EINVAL; + } + + if (val > TPS65224_BUCK1_VOLT_MAX_HEX) + return -EINVAL; + else if (val >= 0xAB) + return 1660000 + (val - 0xAB) * 20000; + else if (val >= 0x73) + return 1100000 + (val - 0x73) * 10000; + else if (val >= 0xF) + return 600000 + (val - 0xF) * 5000; + else if (val >= 0xA) + return 500000 + (val - 0xA) * 20000; + else + return -EINVAL; +} + +int tps65224_lookup_slew(int id) +{ + switch (id) { + case 0: + return 10000; + case 1: + return 5000; + case 2: + return 2500; + case 3: + return 1250; + default: + return -1; + } +} + static const struct tps65941_reg_conv_ops buck_conv_ops[] = { [TPS65941_BUCK_CONV_OPS_IDX] = { .volt_mask = TPS65941_BUCK_VOLT_MASK, @@ -154,6 +267,13 @@ static const struct tps65941_reg_conv_ops buck_conv_ops[] = { .slew_mask = TP65941_BUCK_CONF_SLEW_MASK, .lookup_slew = tps65941_lookup_slew, }, + [TPS65224_BUCK_CONV_OPS_IDX] = { + .volt_mask = TPS65941_BUCK_VOLT_MASK, + .volt2val = tps65224_buck_volt2val, + .val2volt = tps65224_buck_val2volt, + .slew_mask = TPS65224_BUCK_CONF_SLEW_MASK, + .lookup_slew = tps65224_lookup_slew, + }, };
static int tps65941_buck_val(struct udevice *dev, int op, int *uV) @@ -162,9 +282,23 @@ static int tps65941_buck_val(struct udevice *dev, int op, int *uV) int ret, delta, uwait, slew, idx; struct dm_regulator_uclass_plat *uc_pdata; const struct tps65941_reg_conv_ops *conv_ops; + ulong chip_id;
idx = dev->driver_data; - conv_ops = &buck_conv_ops[TPS65941_BUCK_CONV_OPS_IDX]; + chip_id = tps65941_get_chip_id(dev); + if (chip_id == TPS65224) { + /* idx is the buck id number as per devicetree node which will be same + * as the regulator name in the datasheet. + * The idx for buck1. buck2, buck3, buck4, buck12 will be 1, 2, 3, 4 + * and 12 respectively. + * In the driver the numbering is from 0. Hence the -1. + */ + idx = (idx == TPS65941_BUCK_ID_12) ? 0 : (idx - 1); + conv_ops = &buck_conv_ops[TPS65224_BUCK_CONV_OPS_IDX]; + } else { + conv_ops = &buck_conv_ops[TPS65941_BUCK_CONV_OPS_IDX]; + } + uc_pdata = dev_get_uclass_plat(dev);
if (op == PMIC_OP_GET) @@ -265,23 +399,99 @@ static int tps65941_ldo_val2volt(__maybe_unused int idx, int val) return -EINVAL; }
+static int tps65224_ldo_volt2val(int idx, int uV) +{ + int base = TPS65224_LDO1_VOLT_MIN; + int max = TPS65224_LDO1_VOLT_MAX; + int offset = TPS65224_LDO1_VOLT_MIN_HEX; + int step = TPS65224_LDO_STEP; + + if (idx > 0) { + base = TPS65224_LDO23_VOLT_MIN; + max = TPS65224_LDO23_VOLT_MAX; + offset = TPS65224_LDO23_VOLT_MIN_HEX; + } + + if (uV > max) + return -EINVAL; + else if (uV >= base) + return (uV - base) / step + offset; + else + return -EINVAL; +} + +static int tps65224_ldo_val2volt(int idx, int val) +{ + int reg_base = TPS65224_LDO1_VOLT_MIN_HEX; + int reg_max = TPS65224_LDO1_VOLT_MAX_HEX; + int base = TPS65224_LDO1_VOLT_MIN; + int max = TPS65224_LDO1_VOLT_MAX; + int step = TPS65224_LDO_STEP; + /* In LDOx_VOUT reg the BIT0 is reserved and the + * vout value is stored from BIT1 to BIT7. + * Hence the below bit shit is done. + */ + int mask = TPS65224_LDO_VOLT_MASK >> 1; + + if (idx > 0) { + base = TPS65224_LDO23_VOLT_MIN; + max = TPS65224_LDO23_VOLT_MAX; + reg_base = TPS65224_LDO23_VOLT_MIN_HEX; + reg_max = TPS65224_LDO23_VOLT_MAX_HEX; + } + + /* The VSET register of LDO has its 0th bit as reserved + * hence shifting the value to right by 1 bit. + */ + val = val >> 1; + + if (val < 0 || val > mask) + return -EINVAL; + + if (val <= reg_base) + return base; + + if (val >= reg_max) + return max; + + return base + (step * (val - reg_base)); +} + static const struct tps65941_reg_conv_ops ldo_conv_ops[] = { [TPS65941_LDO_CONV_OPS_IDX] = { .volt_mask = TPS65941_LDO_VOLT_MASK, .volt2val = tps65941_buck_volt2val, .val2volt = tps65941_ldo_val2volt, }, + [TPS65224_LDO_CONV_OPS_IDX] = { + .volt_mask = TPS65224_LDO_VOLT_MASK, + .volt2val = tps65224_ldo_volt2val, + .val2volt = tps65224_ldo_val2volt, + }, };
static int tps65941_ldo_val(struct udevice *dev, int op, int *uV) { unsigned int hex, adr; - int ret, idx; + int ret, ret_volt, idx; struct dm_regulator_uclass_plat *uc_pdata; const struct tps65941_reg_conv_ops *conv_ops; + ulong chip_id;
+ chip_id = tps65941_get_chip_id(dev); idx = dev->driver_data; - conv_ops = &ldo_conv_ops[TPS65941_LDO_CONV_OPS_IDX]; + if (chip_id == TPS65224) { + /* idx is the ldo id number as per devicetree node which will be same + * as the regulator name in the datasheet. + * The idx for ldo1, ldo2, ldo3 will be 1, 2 & 3 respectively. + * In the driver the numbering is from 0. Hence the -1. + */ + idx = idx - 1; + conv_ops = &ldo_conv_ops[TPS65224_LDO_CONV_OPS_IDX]; + } else { + conv_ops = &ldo_conv_ops[TPS65941_LDO_CONV_OPS_IDX]; + } + uc_pdata = dev_get_uclass_plat(dev);
if (op == PMIC_OP_GET) @@ -294,21 +504,36 @@ static int tps65941_ldo_val(struct udevice *dev, int op, int *uV) return ret;
ret &= conv_ops->volt_mask; - ret = conv_ops->val2volt(idx, ret); - if (ret < 0) - return ret; + ret_volt = conv_ops->val2volt(idx, ret); + if (ret_volt < 0) + return ret_volt;
if (op == PMIC_OP_GET) { - *uV = ret; + *uV = ret_volt; return 0; }
+ /* TPS65224 LDO1 in BYPASS mode only supports 2.2V min to 3.6V max */ + if (chip_id == TPS65224 && idx == 0 && (ret & BIT(TPS65224_LDO_BYP_CONFIG)) && + *uV < TPS65224_LDO1_VOLT_BYP_MIN) + return -EINVAL; + + /* TPS65224 LDO2 & LDO3 in BYPASS mode supports 1.5V min to 5.5V max */ + if (chip_id == TPS65224 && idx > 0 && (ret & BIT(TPS65224_LDO_BYP_CONFIG)) && + *uV < TPS65224_LDO23_VOLT_BYP_MIN) + return -EINVAL; + hex = conv_ops->volt2val(idx, *uV); if (hex < 0) return hex;
- ret &= 0x0; - ret = hex; + if (chip_id == TPS65224) { + hex = hex << TPS65941_LDO_MODE_MASK; + ret &= ~TPS65224_LDO_VOLT_MASK; + ret |= hex; + } else { + ret = hex; + }
ret = pmic_reg_write(dev->parent, adr, ret);
@@ -319,6 +544,9 @@ static int tps65941_ldo_probe(struct udevice *dev) { struct dm_regulator_uclass_plat *uc_pdata; int idx; + ulong chip_id; + + chip_id = tps65941_get_chip_id(dev);
uc_pdata = dev_get_uclass_plat(dev); uc_pdata->type = REGULATOR_TYPE_LDO; @@ -328,9 +556,16 @@ static int tps65941_ldo_probe(struct udevice *dev) case TPS65941_LDO_ID_1: case TPS65941_LDO_ID_2: case TPS65941_LDO_ID_3: - case TPS65941_LDO_ID_4: debug("Single phase regulator\n"); break; + case TPS65941_LDO_ID_4: + if (chip_id != TPS65224) { + debug("Single phase regulator\n"); + } else { + pr_err("Wrong ID for regulator\n"); + return -EINVAL; + } + break; default: pr_err("Wrong ID for regulator\n"); return -EINVAL; @@ -346,6 +581,9 @@ static int tps65941_buck_probe(struct udevice *dev) { struct dm_regulator_uclass_plat *uc_pdata; int idx; + ulong chip_id; + + chip_id = tps65941_get_chip_id(dev);
uc_pdata = dev_get_uclass_plat(dev); uc_pdata->type = REGULATOR_TYPE_BUCK; @@ -356,16 +594,35 @@ static int tps65941_buck_probe(struct udevice *dev) case TPS65941_BUCK_ID_2: case TPS65941_BUCK_ID_3: case TPS65941_BUCK_ID_4: - case TPS65941_BUCK_ID_5: debug("Single phase regulator\n"); break; + case TPS65941_BUCK_ID_5: + if (chip_id != TPS65224) { + debug("Single phase regulator\n"); + } else { + pr_err("Wrong ID for regulator\n"); + return -EINVAL; + } + break; case TPS65941_BUCK_ID_12: + idx = 1; + break; case TPS65941_BUCK_ID_123: case TPS65941_BUCK_ID_1234: - idx = 1; + if (chip_id != TPS65224) { + idx = 1; + } else { + pr_err("Wrong ID for regulator\n"); + return -EINVAL; + } break; case TPS65941_BUCK_ID_34: - idx = 3; + if (chip_id != TPS65224) { + idx = 3; + } else { + pr_err("Wrong ID for regulator\n"); + return -EINVAL; + } break; default: pr_err("Wrong ID for regulator\n");