[RESEND PATCH v3 5/5] power: regulator: tps65941: Add TPS65224 PMIC regulator support
Bhargav Raviprakash
bhargav.r at ltts.com
Mon Apr 22 09:34:52 CEST 2024
On Thu, 18 Apr 2024 09:33:30 +0900, Jaehoon Chung wrote:
> On 3/18/24 18:49, Bhargav Raviprakash wrote:
> > 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 at 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;
>
> Is it possible to use the below?
>
> if (chip_id != TPS65224) {
> debug("Single phase regulator\n");
> break;
> }
>
> /* fallthrough */
>
> Best Regards,
> Jaehoon Chung
>
Got it, thanks for suggesting it!
Will do the change and send it in next version.
> > 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");
Regards,
Bhargav
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