Unverified Commit 914df8fa authored by Joseph Chen's avatar Joseph Chen Committed by Mark Brown
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regulator: fan53555: Add TCS4525 DCDC support 



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: default avatarJoseph Chen <chenjh@rock-chips.com>
[Ezequiel: Forward port]
Signed-off-by: default avatarEzequiel Garcia <ezequiel@collabora.com>
Link: https://lore.kernel.org/r/20210421210338.43819-3-ezequiel@collabora.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 3007accc

drivers/regulator/fan53555.c

+122 −14
Original line number Diff line number Diff line
@@ -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:
@@ -329,6 +392,10 @@ static int fan53555_device_setup(struct fan53555_device_info *di, 
	int ret = 0;



	/* Setup voltage control register */

	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;
@@ -342,6 +409,26 @@ static int fan53555_device_setup(struct fan53555_device_info *di, 
			dev_err(di->dev, "Invalid VSEL ID!\n");

			return -EINVAL;

		}

		break;

	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, "vendor %d not supported!\n", di->vendor);

		return -EINVAL;

	}



	/* Setup mode control register */

	switch (di->vendor) {
@@ -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

	},

	{ },

};