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power: regulator: tps65941: Fix voltage calculation for ldo

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As per TRM[0] Section 8.7.1 "TPS6594-Q1 Registers", LDOx_Vout
bit 6-1, define the NVM voltage settings.
Along side table 8-4 of above TRM, shows voltage to value mapping.

Driver wrongly using bits 5-1 to calculate voltage, and to convert
voltage to value driver was using buck's calculation.
So fix those calculation.

[0]: https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf

Fixes: 5d7dbd22cf ("power: regulator: tps65941: use function callbacks for conversion ops")
Signed-off-by: Udit Kumar <u-kumar1@ti.com>
Reviewed-by: Neha Malcom Francis <n-francis@ti.com>
This commit is contained in:
Udit Kumar 2025-02-11 23:21:58 +05:30 • committed by Tom Rini
parent 92880a58ca
commit e93f11148a
2 changed files with 15 additions and 4 deletions
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16
drivers/power/regulator/tps65941_regulator.c
View file

@ -388,6 +388,14 @@ static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
return 0;
}
static int tps65941_ldo_volt2val(__maybe_unused int idx, int uV)
{
if (uV > TPS65941_LDO_VOLT_MAX || uV < TPS65941_LDO_VOLT_MIN)
return -EINVAL;
return ((uV - 600000) / 50000 + 0x4) << TPS65941_LDO_MODE_MASK;
}
static int tps65941_ldo_val2volt(__maybe_unused int idx, int val)
{
if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
@ -459,7 +467,7 @@ static int tps65224_ldo_val2volt(int idx, int val)
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,
.volt2val = tps65941_ldo_volt2val,
.val2volt = tps65941_ldo_val2volt,
},
[TPS65224_LDO_CONV_OPS_IDX] = {
@ -472,7 +480,7 @@ static const struct tps65941_reg_conv_ops ldo_conv_ops[] = {
static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret, ret_volt, idx;
int ret, ret_volt, idx, ldo_bypass;
struct dm_regulator_uclass_plat *uc_pdata;
const struct tps65941_reg_conv_ops *conv_ops;
ulong chip_id;
@ -502,7 +510,9 @@ static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
if (ret < 0)
return ret;
ldo_bypass = ret & TPS65941_LDO_BYPASS_EN;
ret &= conv_ops->volt_mask;
ret = ret >> TPS65941_LDO_MODE_MASK;
ret_volt = conv_ops->val2volt(idx, ret);
if (ret_volt < 0)
return ret_volt;
@ -531,7 +541,7 @@ static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
ret &= ~TPS65224_LDO_VOLT_MASK;
ret |= hex;
} else {
ret = hex;
ret = hex | ldo_bypass;
}
ret = pmic_reg_write(dev->parent, adr, ret);

3
include/power/tps65941.h
View file

@ -21,10 +21,11 @@
#define TPS65941_BUCK_VOLT_MAX 3340000
#define TPS65941_BUCK_MODE_MASK 0x1
#define TPS65941_LDO_VOLT_MASK 0x3E
#define TPS65941_LDO_VOLT_MASK 0x7E
#define TPS65941_LDO_VOLT_MAX_HEX 0x3A
#define TPS65941_LDO_VOLT_MIN_HEX 0x4
#define TPS65941_LDO_VOLT_MAX 3300000
#define TPS65941_LDO_VOLT_MIN 600000
#define TPS65941_LDO_MODE_MASK 0x1
#define TPS65941_LDO_BYPASS_EN 0x80
#define TP65941_BUCK_CONF_SLEW_MASK 0x7