[RESEND PATCH v3 5/5] power: regulator: tps65941: Add TPS65224 PMIC regulator support
Jaehoon Chung
jh80.chung at samsung.com
Thu Apr 18 02:33:30 CEST 2024
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
> 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");
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