Merge "regulator: qpnp-labibb-regulator: support configuring LAB CURRENT_SENSE"

- qcom,qpnp-lab-pull-down-enable:	If this property is present, pull down is enabled for LAB regulator. Otherwise, pull down is disabled for LAB regulator.

- qcom,qpnp-lab-limit-max-current-enable:	If this property is present, maximum inductor current constraint is put for LAB regulator. Otherwise, There is no maximum current constraint.

- qcom,qpnp-lab-use-default-voltage:		When bootloader does not turn on LAB regulator and this property is present, value specified in qcom,qpnp-lab-init-voltage is the default init voltage when the voltage output register is of value 0. Otherwise, we need to enable the output override bit in voltage output register.

- qpnp,qpnp-lab-current-sense:	If this property is present, the LAB current sense gain will be programmed for LAB regulator.

				Otherwise, LAB current sense gain will be default to "1x". A string uses to specify the LAB current sense gain.

				Could be "0.5x" or "1x" or "1.5x" or "2x". For ex: "0.5x" means current sense gain is 0.5.

Sub IBB node required structure:

- reg:				Specifies the SPMI address and size for this peripheral

#define REG_LAB_CLK_DIV			0x48

#define REG_LAB_IBB_EN_RDY		0x49

#define REG_LAB_CURRENT_LIMIT		0x4B

#define REG_LAB_CURRENT_SENSE		0x4C

#define REG_LAB_PS_CTL			0x50

#define REG_LAB_RDSON_MNGMNT		0x53

#define REG_LAB_PRECHARGE_CTL		0x5E

#define LAB_CURRENT_LIMIT_MASK		((1 << LAB_CURRENT_LIMIT_BITS) - 1)

#define LAB_CURRENT_LIMIT_EN		BIT(7)

/* REG_LAB_CURRENT_SENSE */

#define LAB_CURRENT_SENSE_GAIN_BITS	2

#define LAB_CURRENT_SENSE_GAIN_MASK	((1 << LAB_CURRENT_SENSE_GAIN_BITS) \

					- 1)

/* REG_LAB_PS_CTL */

#define LAB_PS_CTL_BITS			2

#define LAB_PS_CTL_MASK			((1 << LAB_PS_CTL_BITS) - 1)

/* REG_IBB_PWRUP_PWRDN_CTL_1 */

#define IBB_PWRUP_PWRDN_CTL_1_DLY1_BITS	2

#define IBB_PWRUP_PWRDN_CTL_1_DLY1_MASK	((1<<IBB_PWRUP_PWRDN_CTL_1_DLY1_BITS)-1)

#define IBB_PWRUP_PWRDN_CTL_1_DLY1_MASK	\

	((1 << IBB_PWRUP_PWRDN_CTL_1_DLY1_BITS) - 1)

#define IBB_PWRUP_PWRDN_CTL_1_DLY1_SHIFT	3

#define IBB_PWRUP_PWRDN_CTL_1_DLY2_BITS	2

#define IBB_PWRUP_PWRDN_CTL_1_DLY2_MASK	((1<<IBB_PWRUP_PWRDN_CTL_1_DLY2_BITS)-1)

#define IBB_PWRUP_PWRDN_CTL_1_DLY2_MASK	\

	((1 << IBB_PWRUP_PWRDN_CTL_1_DLY2_BITS) - 1)

#define IBB_PWRUP_PWRDN_CTL_1_LAB_VREG_OK	BIT(7)

#define IBB_PWRUP_PWRDN_CTL_1_EN_DLY1	BIT(6)

#define PWRUP_PWRDN_CTL_1_DISCHARGE_EN	BIT(2)

	800,

};

static const char * const lab_current_sense_plan[] = {

	"0.5x",

	"1x",

	"1.5x",

	"2x"

};

static const int ibb_current_limit_plan[] = {

	0,

	50,

	return rc;

}

static int qpnp_labibb_get_matching_idx(const char *val)

{

	int i;

	for (i = 0; i < ARRAY_SIZE(lab_current_sense_plan); i++)

		if (!strcmp(lab_current_sense_plan[i], val))

			return i;

	return -EINVAL;

}

static int qpnp_lab_dt_init(struct qpnp_labibb *labibb,

				struct device_node *of_node)

{

	struct regulator_desc *rdesc;

	struct regulator_config cfg = {};

	u8 ibb_en_rdy_val, val;

	const char *current_sense_str;

	bool config_current_sense = false;

	if (!of_node) {

		dev_err(labibb->dev, "qpnp lab regulator device tree node is missing\n");

		}

		if (labibb->mode == QPNP_LABIBB_AMOLED_MODE) {

			/*

			 * default to 1.5 times current gain if

			 * user doesn't specify the current-sense

			 * dt parameter

			 */

			current_sense_str = "1.5x";

			val = qpnp_labibb_get_matching_idx(current_sense_str);

			config_current_sense = true;

		}

		if (of_find_property(of_node,

			"qpnp,qpnp-lab-current-sense", NULL)) {

			config_current_sense = true;

			rc = of_property_read_string(of_node,

				"qpnp,qpnp-lab-current-sense",

				&current_sense_str);

			if (!rc) {

				val = qpnp_labibb_get_matching_idx(

						current_sense_str);

			} else {

				pr_err("qpnp,qpnp-lab-current-sense configured incorrectly rc = %d\n",

					rc);

				return rc;

			}

		}

		if (config_current_sense) {

			rc = qpnp_labibb_masked_write(labibb, labibb->lab_base +

				REG_LAB_CURRENT_SENSE,

				LAB_CURRENT_SENSE_GAIN_MASK,

				val, 1);

			if (rc) {

				pr_err("qpnp_labibb_write register %x failed rc = %d\n",

					REG_LAB_CURRENT_SENSE, rc);

				return rc;

			}

		}

		labibb->lab_vreg.vreg_enabled = 1;

	} else {

		rc = qpnp_lab_dt_init(labibb, of_node);