Merge "regulator: qpnp-lcdb: Add a DT property for LDO power-down delay" (67b3a388) · Commits · e / devices / android_kernel_xiaomi_nabu

Documentation/devicetree/bindings/regulator/qpnp-lcdb-regulator.txt

+6 −0

Original line number	Diff line number	Diff line
		@@ -39,6 +39,12 @@ First Level Node - LCDB module
		to be enabled only on platforms where voltage needs to
		be ramped up with multiple steps.

		- qcom,pwrdn-delay-ms
		Usage: optional
		Value type: <u32>
		Definition: Required to control the LDO power down delay.
		Possible values are 0, 1, 4, 8.

		Touch-to-wake (TTW) properties:

		TTW supports 2 modes of operation - HW and SW. In the HW mode the enable/disable

drivers/regulator/qpnp-lcdb-regulator.c

+94 −2

Original line number	Diff line number	Diff line
		@@ -114,6 +114,10 @@
		#define PFM_CURRENT_SHIFT 2

		#define LCDB_PWRUP_PWRDN_CTL_REG 0x66
		#define PWRUP_DELAY_MASK GENAMSK(3, 2)
		#define PWRDN_DELAY_MASK GENMASK(1, 0)
		#define PWRDN_DELAY_MIN_MS 0
		#define PWRDN_DELAY_MAX_MS 8

		/* LDO */
		#define LCDB_LDO_OUTPUT_VOLTAGE_REG 0x71
		@@ -126,6 +130,10 @@
		#define LDO_DIS_PULLDOWN_BIT BIT(1)
		#define LDO_PD_STRENGTH_BIT BIT(0)

		#define LCDB_LDO_FORCE_PD_CTL_REG 0x79
		#define LDO_FORCE_PD_EN_BIT BIT(0)
		#define LDO_FORCE_PD_MODE BIT(7)

		#define LCDB_LDO_ILIM_CTL1_REG 0x7B
		#define EN_LDO_ILIM_BIT BIT(7)
		#define SET_LDO_ILIM_MASK GENMASK(2, 0)
		@@ -220,7 +228,9 @@ struct qpnp_lcdb {
		struct regmap *regmap;
		struct pmic_revid_data *pmic_rev_id;
		u32 base;
		u32 wa_flags;
		int sc_irq;
		int pwrdn_delay_ms;

		/* TTW params */
		bool ttw_enable;
		@@ -292,6 +302,11 @@ enum lcdb_settings_index {
		LCDB_SETTING_MAX,
		};

		enum lcdb_wa_flags {
		NCP_SCP_DISABLE_WA = BIT(0),
		FORCE_PD_ENABLE_WA = BIT(1),
		};

		static u32 soft_start_us[] = {
		0,
		500,
		@@ -313,6 +328,13 @@ static u32 ncp_ilim_ma[] = {
		810,
		};

		static const u32 pwrup_pwrdn_ms[] = {
		0,
		1,
		4,
		8,
		};

		#define SETTING(_id, _sec_access, _valid) \
		[_id] = { \
		.address = _id##_REG, \
		@@ -915,6 +937,18 @@ static int qpnp_lcdb_disable(struct qpnp_lcdb *lcdb)
		return 0;
		}

		if (lcdb->wa_flags & FORCE_PD_ENABLE_WA) {
		/*
		* force pull-down to enable quick discharge after
		* turning off
		*/
		val = LDO_FORCE_PD_EN_BIT \| LDO_FORCE_PD_MODE;
		rc = qpnp_lcdb_write(lcdb, lcdb->base +
		LCDB_LDO_FORCE_PD_CTL_REG, &val, 1);
		if (rc < 0)
		return rc;
		}

		val = 0;
		rc = qpnp_lcdb_write(lcdb, lcdb->base + LCDB_ENABLE_CTL1_REG,
		&val, 1);
		@@ -923,6 +957,17 @@ static int qpnp_lcdb_disable(struct qpnp_lcdb *lcdb)
		else
		lcdb->lcdb_enabled = false;

		if (lcdb->wa_flags & FORCE_PD_ENABLE_WA) {
		/* wait for 10 msec after module disable for LDO to discharge */
		usleep_range(10000, 11000);

		val = 0;
		rc = qpnp_lcdb_write(lcdb, lcdb->base +
		LCDB_LDO_FORCE_PD_CTL_REG, &val, 1);
		if (rc < 0)
		return rc;
		}

		return rc;
		}

		@@ -2020,11 +2065,40 @@ static int qpnp_lcdb_init_bst(struct qpnp_lcdb *lcdb)
		return 0;
		}

		static void qpnp_lcdb_pmic_config(struct qpnp_lcdb *lcdb)
		{
		switch (lcdb->pmic_rev_id->pmic_subtype) {
		case PM660L_SUBTYPE:
		if (lcdb->pmic_rev_id->rev4 < PM660L_V2P0_REV4)
		lcdb->wa_flags \|= NCP_SCP_DISABLE_WA;
		break;
		case PMI632_SUBTYPE:
		case PM6150L_SUBTYPE:
		lcdb->wa_flags \|= FORCE_PD_ENABLE_WA;
		break;
		default:
		break;
		}

		pr_debug("LCDB wa_flags = 0x%2x\n", lcdb->wa_flags);
		}

		static int qpnp_lcdb_hw_init(struct qpnp_lcdb *lcdb)
		{
		int rc = 0;
		u8 val = 0;

		qpnp_lcdb_pmic_config(lcdb);

		if (lcdb->pwrdn_delay_ms != -EINVAL) {
		rc = qpnp_lcdb_masked_write(lcdb, lcdb->base +
		LCDB_PWRUP_PWRDN_CTL_REG,
		PWRDN_DELAY_MASK,
		lcdb->pwrdn_delay_ms);
		if (rc < 0)
		return rc;
		}

		rc = qpnp_lcdb_init_bst(lcdb);
		if (rc < 0) {
		pr_err("Failed to initialize BOOST rc=%d\n", rc);
		@@ -2082,7 +2156,8 @@ static int qpnp_lcdb_hw_init(struct qpnp_lcdb *lcdb)

		static int qpnp_lcdb_parse_dt(struct qpnp_lcdb *lcdb)
		{
		int rc = 0;
		int rc = 0, i = 0;
		u32 tmp;
		const char *label;
		struct device_node revid_dev_node, temp, *node = lcdb->dev->of_node;

		@@ -2146,7 +2221,24 @@ static int qpnp_lcdb_parse_dt(struct qpnp_lcdb *lcdb)
		lcdb->voltage_step_ramp =
		of_property_read_bool(node, "qcom,voltage-step-ramp");

		return rc;
		lcdb->pwrdn_delay_ms = -EINVAL;
		rc = of_property_read_u32(node, "qcom,pwrdn-delay-ms", &tmp);
		if (!rc) {
		if (!is_between(tmp, PWRDN_DELAY_MIN_MS, PWRDN_DELAY_MAX_MS)) {
		pr_err("Invalid PWRDN_DLY val %d (min=%d max=%d)\n",
		tmp, PWRDN_DELAY_MIN_MS, PWRDN_DELAY_MAX_MS);
		return -EINVAL;
		}

		for (i = 0; i < ARRAY_SIZE(pwrup_pwrdn_ms); i++) {
		if (tmp == pwrup_pwrdn_ms[i]) {
		lcdb->pwrdn_delay_ms = i;
		break;
		}
		}
		}

		return 0;
		}

		static int qpnp_lcdb_regulator_probe(struct platform_device *pdev)