Unverified Commit 42ba89c8 authored by Jeffrey Hugo's avatar Jeffrey Hugo Committed by Mark Brown
Browse files

regulator: qcom_spmi: Add support for PM8005 



The PM8005 is used on the msm8998 MTP.  The S1 regulator is VDD_GFX, ie
it needs to be on and controlled inorder to use the GPU.  Add support to
drive the PM8005 regulators so that we can bring up the GPU on msm8998.

Signed-off-by: default avatarJeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 4fe0676b

drivers/regulator/qcom_spmi-regulator.c

+176 −0
Original line number Diff line number Diff line
@@ -96,6 +96,7 @@ enum spmi_regulator_logical_type { 
	SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,

	SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,

	SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,

	SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS426,

};



enum spmi_regulator_type {
@@ -142,6 +143,7 @@ enum spmi_regulator_subtype { 
	SPMI_REGULATOR_SUBTYPE_5V_BOOST		= 0x01,

	SPMI_REGULATOR_SUBTYPE_FTS_CTL		= 0x08,

	SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL	= 0x09,

	SPMI_REGULATOR_SUBTYPE_FTS426_CTL	= 0x0a,

	SPMI_REGULATOR_SUBTYPE_BB_2A		= 0x01,

	SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1	= 0x0d,

	SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2	= 0x0e,
@@ -162,6 +164,18 @@ enum spmi_common_regulator_registers { 
	SPMI_COMMON_REG_STEP_CTRL		= 0x61,

};



/*

 * Second common register layout used by newer devices starting with ftsmps426

 * Note that some of the registers from the first common layout remain

 * unchanged and their definition is not duplicated.

 */

enum spmi_ftsmps426_regulator_registers {

	SPMI_FTSMPS426_REG_VOLTAGE_LSB		= 0x40,

	SPMI_FTSMPS426_REG_VOLTAGE_MSB		= 0x41,

	SPMI_FTSMPS426_REG_VOLTAGE_ULS_LSB	= 0x68,

	SPMI_FTSMPS426_REG_VOLTAGE_ULS_MSB	= 0x69,

};



enum spmi_vs_registers {

	SPMI_VS_REG_OCP				= 0x4a,

	SPMI_VS_REG_SOFT_START			= 0x4c,
@@ -221,6 +235,14 @@ enum spmi_common_control_register_index { 
#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK	0x01

#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK	0x1f



#define SPMI_FTSMPS426_MODE_BYPASS_MASK		3

#define SPMI_FTSMPS426_MODE_RETENTION_MASK	4

#define SPMI_FTSMPS426_MODE_LPM_MASK		5

#define SPMI_FTSMPS426_MODE_AUTO_MASK		6

#define SPMI_FTSMPS426_MODE_HPM_MASK		7



#define SPMI_FTSMPS426_MODE_MASK		0x07



/* Common regulator pull down control register layout */

#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK	0x80
@@ -266,6 +288,23 @@ enum spmi_common_control_register_index { 
#define SPMI_FTSMPS_STEP_MARGIN_NUM	4

#define SPMI_FTSMPS_STEP_MARGIN_DEN	5



#define SPMI_FTSMPS426_STEP_CTRL_DELAY_MASK	0x03

#define SPMI_FTSMPS426_STEP_CTRL_DELAY_SHIFT	0



/* Clock rate in kHz of the FTSMPS426 regulator reference clock. */

#define SPMI_FTSMPS426_CLOCK_RATE		4800



/* Minimum voltage stepper delay for each step. */

#define SPMI_FTSMPS426_STEP_DELAY		2



/*

 * The ratio SPMI_FTSMPS426_STEP_MARGIN_NUM/SPMI_FTSMPS426_STEP_MARGIN_DEN is

 * used to adjust the step rate in order to account for oscillator variance.

 */

#define SPMI_FTSMPS426_STEP_MARGIN_NUM	10

#define SPMI_FTSMPS426_STEP_MARGIN_DEN	11





/* VSET value to decide the range of ULT SMPS */

#define ULT_SMPS_RANGE_SPLIT 0x60
@@ -439,6 +478,10 @@ static struct spmi_voltage_range ftsmps2p5_ranges[] = { 
	SPMI_VOLTAGE_RANGE(1,  160000, 1360000, 2200000, 2200000, 10000),

};



static struct spmi_voltage_range ftsmps426_ranges[] = {

	SPMI_VOLTAGE_RANGE(0,       0,  320000, 1352000, 1352000,  4000),

};



static struct spmi_voltage_range boost_ranges[] = {

	SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),

};
@@ -472,6 +515,7 @@ static DEFINE_SPMI_SET_POINTS(ln_ldo); 
static DEFINE_SPMI_SET_POINTS(smps);

static DEFINE_SPMI_SET_POINTS(ftsmps);

static DEFINE_SPMI_SET_POINTS(ftsmps2p5);

static DEFINE_SPMI_SET_POINTS(ftsmps426);

static DEFINE_SPMI_SET_POINTS(boost);

static DEFINE_SPMI_SET_POINTS(boost_byp);

static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
@@ -739,6 +783,23 @@ spmi_regulator_common_set_voltage(struct regulator_dev *rdev, unsigned selector) 
	return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);

}



static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,

					      unsigned selector);



static int spmi_regulator_ftsmps426_set_voltage(struct regulator_dev *rdev,

					      unsigned selector)

{

	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	u8 buf[2];

	int mV;



	mV = spmi_regulator_common_list_voltage(rdev, selector) / 1000;



	buf[0] = mV & 0xff;

	buf[1] = mV >> 8;

	return spmi_vreg_write(vreg, SPMI_FTSMPS426_REG_VOLTAGE_LSB, buf, 2);

}



static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,

		unsigned int old_selector, unsigned int new_selector)

{
@@ -770,6 +831,21 @@ static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev) 
	return spmi_hw_selector_to_sw(vreg, voltage_sel, range);

}



static int spmi_regulator_ftsmps426_get_voltage(struct regulator_dev *rdev)

{

	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	const struct spmi_voltage_range *range;

	u8 buf[2];

	int uV;



	spmi_vreg_read(vreg, SPMI_FTSMPS426_REG_VOLTAGE_LSB, buf, 2);



	uV = (((unsigned int)buf[1] << 8) | (unsigned int)buf[0]) * 1000;

	range = vreg->set_points->range;



	return (uV - range->set_point_min_uV) / range->step_uV;

}



static int spmi_regulator_single_map_voltage(struct regulator_dev *rdev,

		int min_uV, int max_uV)

{
@@ -915,6 +991,23 @@ static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev) 
	}

}



static unsigned int spmi_regulator_ftsmps426_get_mode(struct regulator_dev *rdev)

{

	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	u8 reg;



	spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);



	switch (reg) {

	case SPMI_FTSMPS426_MODE_HPM_MASK:

		return REGULATOR_MODE_NORMAL;

	case SPMI_FTSMPS426_MODE_AUTO_MASK:

		return REGULATOR_MODE_FAST;

	default:

		return REGULATOR_MODE_IDLE;

	}

}



static int

spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)

{
@@ -937,6 +1030,30 @@ spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode) 
	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);

}



static int

spmi_regulator_ftsmps426_set_mode(struct regulator_dev *rdev, unsigned int mode)

{

	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	u8 mask = SPMI_FTSMPS426_MODE_MASK;

	u8 val;



	switch (mode) {

	case REGULATOR_MODE_NORMAL:

		val = SPMI_FTSMPS426_MODE_HPM_MASK;

		break;

	case REGULATOR_MODE_FAST:

		val = SPMI_FTSMPS426_MODE_AUTO_MASK;

		break;

	case REGULATOR_MODE_IDLE:

		val = SPMI_FTSMPS426_MODE_LPM_MASK;

		break;

	default:

		return -EINVAL;

	}



	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);

}



static int

spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)

{
@@ -1266,6 +1383,21 @@ static struct regulator_ops spmi_ult_ldo_ops = { 
	.set_soft_start		= spmi_regulator_common_set_soft_start,

};



static struct regulator_ops spmi_ftsmps426_ops = {

	.enable			= regulator_enable_regmap,

	.disable		= regulator_disable_regmap,

	.is_enabled		= regulator_is_enabled_regmap,

	.set_voltage_sel	= spmi_regulator_ftsmps426_set_voltage,

	.set_voltage_time_sel	= spmi_regulator_set_voltage_time_sel,

	.get_voltage_sel	= spmi_regulator_ftsmps426_get_voltage,

	.map_voltage		= spmi_regulator_single_map_voltage,

	.list_voltage		= spmi_regulator_common_list_voltage,

	.set_mode		= spmi_regulator_ftsmps426_set_mode,

	.get_mode		= spmi_regulator_ftsmps426_get_mode,

	.set_load		= spmi_regulator_common_set_load,

	.set_pull_down		= spmi_regulator_common_set_pull_down,

};



/* Maximum possible digital major revision value */

#define INF 0xFF
@@ -1301,6 +1433,7 @@ static const struct spmi_regulator_mapping supported_regulators[] = { 
	SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST,  boost,  boost,       0),

	SPMI_VREG(FTS,   FTS_CTL,  0, INF, FTSMPS, ftsmps, ftsmps, 100000),

	SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),

	SPMI_VREG(FTS, FTS426_CTL, 0, INF, FTSMPS426, ftsmps426, ftsmps426, 100000),

	SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),

	SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,

						ult_lo_smps,   100000),
@@ -1438,6 +1571,34 @@ static int spmi_regulator_init_slew_rate(struct spmi_regulator *vreg) 
	return ret;

}



static int spmi_regulator_init_slew_rate_ftsmps426(struct spmi_regulator *vreg)

{

	int ret;

	u8 reg = 0;

	int delay, slew_rate;

	const struct spmi_voltage_range *range = &vreg->set_points->range[0];



	ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);

	if (ret) {

		dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);

		return ret;

	}



	delay = reg & SPMI_FTSMPS426_STEP_CTRL_DELAY_MASK;

	delay >>= SPMI_FTSMPS426_STEP_CTRL_DELAY_SHIFT;



	/* slew_rate has units of uV/us */

	slew_rate = SPMI_FTSMPS426_CLOCK_RATE * range->step_uV;

	slew_rate /= 1000 * (SPMI_FTSMPS426_STEP_DELAY << delay);

	slew_rate *= SPMI_FTSMPS426_STEP_MARGIN_NUM;

	slew_rate /= SPMI_FTSMPS426_STEP_MARGIN_DEN;



	/* Ensure that the slew rate is greater than 0 */

	vreg->slew_rate = max(slew_rate, 1);



	return ret;

}



static int spmi_regulator_init_registers(struct spmi_regulator *vreg,

				const struct spmi_regulator_init_data *data)

{
@@ -1577,6 +1738,12 @@ static int spmi_regulator_of_parse(struct device_node *node, 
		ret = spmi_regulator_init_slew_rate(vreg);

		if (ret)

			return ret;

		break;

	case SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS426:

		ret = spmi_regulator_init_slew_rate_ftsmps426(vreg);

		if (ret)

			return ret;

		break;

	default:

		break;

	}
@@ -1733,7 +1900,16 @@ static const struct spmi_regulator_data pmi8994_regulators[] = { 
	{ }

};



static const struct spmi_regulator_data pm8005_regulators[] = {

	{ "s1", 0x1400, "vdd_s1", },

	{ "s2", 0x1700, "vdd_s2", },

	{ "s3", 0x1a00, "vdd_s3", },

	{ "s4", 0x1d00, "vdd_s4", },

	{ }

};



static const struct of_device_id qcom_spmi_regulator_match[] = {

	{ .compatible = "qcom,pm8005-regulators", .data = &pm8005_regulators },

	{ .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },

	{ .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },

	{ .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },

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