[PATCH 3/3] regulator: fan53555: Add TCS4525 DCDC support

From: Ezequiel Garcia
Date: Wed Apr 21 2021 - 17:04:06 EST

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From: Joseph Chen <chenjh@xxxxxxxxxxxxxx>

TCS4525 main features:

- 2.7V to 5.5V Input Voltage Range;
- 3MHz Constant Switching Frequency;
- 5A Available Load Current;
- Programmable Output Voltage: 0.6V to 1.4V in 6.25mV Steps;
- PFM/PWM Operation for Optimum Increased Efficiency;

Signed-off-by: Joseph Chen <chenjh@xxxxxxxxxxxxxx>
[Ezequiel: Forward port]
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
---
drivers/regulator/fan53555.c | 136 +++++++++++++++++++++++++++++++----
1 file changed, 122 insertions(+), 14 deletions(-)

diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index aa426183b6a1..f3918f03aaf3 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -24,6 +24,12 @@
/* Voltage setting */
#define FAN53555_VSEL0 0x00
#define FAN53555_VSEL1 0x01
+
+#define TCS4525_VSEL0 0x11
+#define TCS4525_VSEL1 0x10
+#define TCS4525_TIME 0x13
+#define TCS4525_COMMAND 0x14
+
/* Control register */
#define FAN53555_CONTROL 0x02
/* IC Type */
@@ -49,11 +55,20 @@

#define FAN53555_NVOLTAGES 64 /* Numbers of voltages */
#define FAN53526_NVOLTAGES 128
+#define TCS4525_NVOLTAGES 127 /* Numbers of voltages */
+
+#define TCS_VSEL_NSEL_MASK 0x7f
+#define TCS_VSEL0_MODE (1 << 7)
+#define TCS_VSEL1_MODE (1 << 6)
+
+#define TCS_SLEW_SHIFT 3
+#define TCS_SLEW_MASK (0x3 < 3)

enum fan53555_vendor {
FAN53526_VENDOR_FAIRCHILD = 0,
FAN53555_VENDOR_FAIRCHILD,
FAN53555_VENDOR_SILERGY,
+ FAN53555_VENDOR_TCS,
};

enum {
@@ -106,6 +121,11 @@ struct fan53555_device_info {
unsigned int mode_mask;
/* Sleep voltage cache */
unsigned int sleep_vol_cache;
+ /* Slew rate */
+ unsigned int slew_reg;
+ unsigned int slew_mask;
+ unsigned int slew_shift;
+ unsigned int slew_rate;
};

static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
@@ -189,13 +209,37 @@ static const int slew_rates[] = {
500,
};

+static const int tcs_slew_rates[] = {
+ 18700,
+ 9300,
+ 4600,
+ 2300,
+};
+
static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
{
struct fan53555_device_info *di = rdev_get_drvdata(rdev);
int regval = -1, i;
+ const int *slew_rate_t;
+ int slew_rate_n;

- for (i = 0; i < ARRAY_SIZE(slew_rates); i++) {
- if (ramp <= slew_rates[i])
+ switch (di->vendor) {
+ case FAN53526_VENDOR_FAIRCHILD:
+ case FAN53555_VENDOR_FAIRCHILD:
+ case FAN53555_VENDOR_SILERGY:
+ slew_rate_t = slew_rates;
+ slew_rate_n = ARRAY_SIZE(slew_rates);
+ break;
+ case FAN53555_VENDOR_TCS:
+ slew_rate_t = tcs_slew_rates;
+ slew_rate_n = ARRAY_SIZE(tcs_slew_rates);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ for (i = 0; i < slew_rate_n; i++) {
+ if (ramp <= slew_rate_t[i])
regval = i;
else
break;
@@ -206,8 +250,8 @@ static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
return -EINVAL;
}

- return regmap_update_bits(rdev->regmap, FAN53555_CONTROL,
- CTL_SLEW_MASK, regval << CTL_SLEW_SHIFT);
+ return regmap_update_bits(rdev->regmap, di->slew_reg,
+ di->slew_mask, regval << di->slew_shift);
}

static const struct regulator_ops fan53555_regulator_ops = {
@@ -292,7 +336,9 @@ static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
"Chip ID %d not supported!\n", di->chip_id);
return -EINVAL;
}
-
+ di->slew_reg = FAN53555_CONTROL;
+ di->slew_mask = CTL_SLEW_MASK;
+ di->slew_shift = CTL_SLEW_SHIFT;
di->vsel_count = FAN53555_NVOLTAGES;

return 0;
@@ -312,12 +358,29 @@ static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
"Chip ID %d not supported!\n", di->chip_id);
return -EINVAL;
}
-
+ di->slew_reg = FAN53555_CONTROL;
+ di->slew_reg = FAN53555_CONTROL;
+ di->slew_mask = CTL_SLEW_MASK;
+ di->slew_shift = CTL_SLEW_SHIFT;
di->vsel_count = FAN53555_NVOLTAGES;

return 0;
}

+static int fan53555_voltages_setup_tcs(struct fan53555_device_info *di)
+{
+ di->slew_reg = TCS4525_TIME;
+ di->slew_mask = TCS_SLEW_MASK;
+ di->slew_shift = TCS_SLEW_MASK;
+
+ /* Init voltage range and step */
+ di->vsel_min = 600000;
+ di->vsel_step = 6250;
+ di->vsel_count = TCS4525_NVOLTAGES;
+
+ return 0;
+}
+
/* For 00,01,03,05 options:
* VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
* For 04 option:
@@ -329,17 +392,41 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
int ret = 0;

/* Setup voltage control register */
- switch (pdata->sleep_vsel_id) {
- case FAN53555_VSEL_ID_0:
- di->sleep_reg = FAN53555_VSEL0;
- di->vol_reg = FAN53555_VSEL1;
+ switch (di->vendor) {
+ case FAN53526_VENDOR_FAIRCHILD:
+ case FAN53555_VENDOR_FAIRCHILD:
+ case FAN53555_VENDOR_SILERGY:
+ switch (pdata->sleep_vsel_id) {
+ case FAN53555_VSEL_ID_0:
+ di->sleep_reg = FAN53555_VSEL0;
+ di->vol_reg = FAN53555_VSEL1;
+ break;
+ case FAN53555_VSEL_ID_1:
+ di->sleep_reg = FAN53555_VSEL1;
+ di->vol_reg = FAN53555_VSEL0;
+ break;
+ default:
+ dev_err(di->dev, "Invalid VSEL ID!\n");
+ return -EINVAL;
+ }
break;
- case FAN53555_VSEL_ID_1:
- di->sleep_reg = FAN53555_VSEL1;
- di->vol_reg = FAN53555_VSEL0;
+ case FAN53555_VENDOR_TCS:
+ switch (pdata->sleep_vsel_id) {
+ case FAN53555_VSEL_ID_0:
+ di->sleep_reg = TCS4525_VSEL0;
+ di->vol_reg = TCS4525_VSEL1;
+ break;
+ case FAN53555_VSEL_ID_1:
+ di->sleep_reg = TCS4525_VSEL1;
+ di->vol_reg = TCS4525_VSEL0;
+ break;
+ default:
+ dev_err(di->dev, "Invalid VSEL ID!\n");
+ return -EINVAL;
+ }
break;
default:
- dev_err(di->dev, "Invalid VSEL ID!\n");
+ dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
return -EINVAL;
}

@@ -362,6 +449,18 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
di->mode_reg = di->vol_reg;
di->mode_mask = VSEL_MODE;
break;
+ case FAN53555_VENDOR_TCS:
+ di->mode_reg = TCS4525_COMMAND;
+
+ switch (pdata->sleep_vsel_id) {
+ case FAN53555_VSEL_ID_0:
+ di->mode_mask = TCS_VSEL1_MODE;
+ break;
+ case FAN53555_VSEL_ID_1:
+ di->mode_mask = TCS_VSEL0_MODE;
+ break;
+ }
+ break;
default:
dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
return -EINVAL;
@@ -378,6 +477,9 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
case FAN53555_VENDOR_SILERGY:
ret = fan53555_voltages_setup_silergy(di);
break;
+ case FAN53555_VENDOR_TCS:
+ ret = fan53555_voltages_setup_tcs(di);
+ break;
default:
dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
return -EINVAL;
@@ -449,6 +551,9 @@ static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
}, {
.compatible = "silergy,syr828",
.data = (void *)FAN53555_VENDOR_SILERGY,
+ }, {
+ .compatible = "tcs,tcs4525",
+ .data = (void *)FAN53555_VENDOR_TCS
},
{ }
};
@@ -554,6 +659,9 @@ static const struct i2c_device_id fan53555_id[] = {
}, {
.name = "syr828",
.driver_data = FAN53555_VENDOR_SILERGY
+ }, {
+ .name = "tcs4525",
+ .driver_data = FAN53555_VENDOR_TCS
},
{ },
};
--
2.30.0

Next message: Tom Zanussi: "[PATCH v3 0/2] dmaengine: idxd: IDXD pmu support"
Previous message: Ezequiel Garcia: "[PATCH 2/3] dt-bindings: regulator: Add support for TCS4525"
In reply to: Ezequiel Garcia: "[PATCH 2/3] dt-bindings: regulator: Add support for TCS4525"
Next in thread: Mark Brown: "Re: [PATCH 1/3] dt-bindings: vendor-prefixes: Add Tang Cheng (TCS)"
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