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Commit 0a1de26d authored by Shyam Kumar Thella's avatar Shyam Kumar Thella
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regulator: qpnp-amoled: Add set_load() callback for IBB regulator 



Add support for set_load() callback for IBB regulator device so that
display driver can call regulator_set_load() to configure dual phase
for selfie flash use case.

For IBB regulator:
 If load current <= 30mA, use single phase
 If load current > 30mA, use dual phase.

Change-Id: I93698a974484f0919893af31f6dfa27ebb30a4e4
Signed-off-by: default avatarShyam Kumar Thella <sthella@codeaurora.org>
parent 2e360a82

drivers/regulator/qpnp-amoled-regulator.c

+52 −5
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ 
#define AB_PERIPH_TYPE			0x24

#define OLEDB_PERIPH_TYPE		0x2C



#define PERIPH_SUBTYPE			0x05



/* AB */

#define AB_LDO_PD_CTL(chip)		(chip->ab_base + 0x78)
@@ -32,6 +34,14 @@ 
/* IBB_PD_CTL */

#define ENABLE_PD_BIT			BIT(7)



#define IBB_DUAL_PHASE_CTL(chip)		(chip->ibb_base + 0x70)



/* IBB_DUAL_PHASE_CTL */

#define IBB_DUAL_PHASE_CTL_MASK		GENMASK(2, 0)

#define AUTO_DUAL_PHASE_BIT			BIT(2)

#define FORCE_DUAL_PHASE_BIT			BIT(1)

#define FORCE_SINGLE_PHASE_BIT			BIT(0)



struct amoled_regulator {

	struct regulator_desc	rdesc;

	struct regulator_dev	*rdev;
@@ -57,6 +67,7 @@ struct ab_regulator { 


struct ibb_regulator {

	struct amoled_regulator	vreg;

	u8			subtype;



	/* DT params */

	bool			swire_control;
@@ -82,6 +93,19 @@ enum reg_type { 
	IBB,

};



enum ibb_subtype {

	PM8150A_IBB = 0x03,

	PM8350B_IBB = 0x04,

};



static inline bool is_phase_ctrl_supported(struct ibb_regulator *ibb)

{

	if (ibb->subtype == PM8350B_IBB)

		return true;



	return false;

}



static int qpnp_amoled_read(struct qpnp_amoled *chip,

			u16 addr, u8 *value, u8 count)

{
@@ -266,6 +290,28 @@ static unsigned int qpnp_ab_ibb_regulator_get_mode(struct regulator_dev *rdev) 
	return chip->ibb.vreg.mode;

}



#define SINGLE_PHASE_LIMIT_UA	30000000



static int qpnp_ibb_regulator_set_load(struct regulator_dev *rdev,

				int load_uA)

{

	struct qpnp_amoled *chip  = rdev_get_drvdata(rdev);

	u8 ibb_phase;



	if (!is_phase_ctrl_supported(&chip->ibb))

		return 0;



	if (load_uA < 0)

		return -EINVAL;

	else if (load_uA <= SINGLE_PHASE_LIMIT_UA)

		ibb_phase = FORCE_SINGLE_PHASE_BIT;

	else

		ibb_phase = FORCE_DUAL_PHASE_BIT;



	return qpnp_amoled_masked_write(chip, IBB_DUAL_PHASE_CTL(chip),

			IBB_DUAL_PHASE_CTL_MASK, ibb_phase);

}



static struct regulator_ops qpnp_amoled_ab_ops = {

	.enable		= qpnp_ab_regulator_enable,

	.disable	= qpnp_ab_regulator_disable,
@@ -284,6 +330,7 @@ static struct regulator_ops qpnp_amoled_ibb_ops = { 
	.get_voltage	= qpnp_ab_ibb_regulator_get_voltage,

	.set_mode	= qpnp_ab_ibb_regulator_set_mode,

	.get_mode	= qpnp_ab_ibb_regulator_get_mode,

	.set_load	= qpnp_ibb_regulator_set_load,

};



/* OLEDB regulator */
@@ -475,7 +522,7 @@ static int qpnp_amoled_parse_dt(struct qpnp_amoled *chip) 
	const __be32 *prop_addr;

	int rc = 0;

	u32 base;

	u8 val;

	u8 val[2];



	for_each_available_child_of_node(node, temp) {

		prop_addr = of_get_address(temp, 0, NULL, NULL);
@@ -485,13 +532,13 @@ static int qpnp_amoled_parse_dt(struct qpnp_amoled *chip) 
		}



		base = be32_to_cpu(*prop_addr);

		rc = qpnp_amoled_read(chip, base + PERIPH_TYPE, &val, 1);

		rc = qpnp_amoled_read(chip, base + PERIPH_TYPE, val, 2);

		if (rc < 0) {

			pr_err("Couldn't read PERIPH_TYPE for base %x\n", base);

			return rc;

		}



		switch (val) {

		switch (val[0]) {

		case OLEDB_PERIPH_TYPE:

			chip->oledb_base = base;

			chip->oledb.vreg.node = temp;
@@ -513,12 +560,12 @@ static int qpnp_amoled_parse_dt(struct qpnp_amoled *chip) 
							"qcom,swire-control");

			chip->ibb.pd_control = of_property_read_bool(temp,

							"qcom,aod-pd-control");

			chip->ibb.subtype = val[1];

			break;

		default:

			pr_err("Unknown peripheral type 0x%x\n", val);

			pr_err("Unknown peripheral type 0x%x\n", val[0]);

			return -EINVAL;

		}



	}



	return 0;