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Commit de7005f0 authored by Jishnu Prakash's avatar Jishnu Prakash
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regulator: qpnp-lcdb: Add support for NCP symmetry with LDO 



Add a device tree property which enables NCP symmetry. This
configuration in HW enables the NCP voltage to follow LDO.

Change-Id: If44b049a3ecd031f111dcb8477166925a0d01914
Signed-off-by: default avatarJishnu Prakash <jprakash@codeaurora.org>
parent 9ddceddf

drivers/regulator/qpnp-lcdb-regulator.c

+16 −1
Original line number Diff line number Diff line
@@ -182,6 +182,7 @@ 


/* NCP */

#define LCDB_NCP_OUTPUT_VOLTAGE_REG	0x81

#define EN_NCP_VOUT_SYMMETRY_BIT		BIT(7)



#define LCDB_NCP_VREG_OK_CTL_REG	0x85
@@ -282,6 +283,7 @@ struct qpnp_lcdb { 
	int				min_voltage_mv;

	int				max_voltage_mv;

	int				pwrup_config;

	bool			ncp_symmetry;



	/* TTW params */

	bool				ttw_enable;
@@ -1525,7 +1527,8 @@ static int qpnp_lcdb_get_voltage(struct qpnp_lcdb *lcdb, 
	if (type == BST)

		return qpnp_lcdb_get_bst_voltage(lcdb, voltage_mv);



	if (type == NCP)

	/* When symmetry is enabled, NCP voltage directly follows LDO voltage */

	if (type == NCP && !lcdb->ncp_symmetry)

		offset = LCDB_NCP_OUTPUT_VOLTAGE_REG;



	rc = qpnp_lcdb_read(lcdb, lcdb->base + offset, &val, 1);
@@ -2465,6 +2468,15 @@ static int qpnp_lcdb_hw_init(struct qpnp_lcdb *lcdb) 
			return rc;

	}



	if (lcdb->ncp_symmetry) {

		rc = qpnp_lcdb_masked_write(lcdb, lcdb->base +

					    LCDB_NCP_OUTPUT_VOLTAGE_REG,

					    EN_NCP_VOUT_SYMMETRY_BIT,

					    EN_NCP_VOUT_SYMMETRY_BIT);

		if (rc < 0)

			return rc;

	}



	rc = qpnp_lcdb_init_bst(lcdb);

	if (rc < 0) {

		pr_err("Failed to initialize BOOST rc=%d\n", rc);
@@ -2588,6 +2600,9 @@ static int qpnp_lcdb_parse_dt(struct qpnp_lcdb *lcdb) 
	lcdb->voltage_step_ramp =

			of_property_read_bool(node, "qcom,voltage-step-ramp");



	lcdb->ncp_symmetry =

			of_property_read_bool(node, "qcom,ncp-symmetry");



	lcdb->pwrdn_delay_ms = -EINVAL;

	lcdb->pwrup_delay_ms = -EINVAL;

	lcdb->pwrup_config = -EINVAL;