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Commit 79bb0603 authored by Anirudh Ghayal's avatar Anirudh Ghayal
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regulator: labibb: Add support to configure SWIRE-pulse output voltage 



Add a DT property to configure the voltage at the first SWIRE pulse.

CRs-Fixed: 941809
Change-Id: I8bdc76156af78bf945aaf677c480745d0451f4a2
Signed-off-by: default avatarAnirudh Ghayal <aghayal@codeaurora.org>
parent 49c2753f

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

+5 −0
Original line number Diff line number Diff line
@@ -186,6 +186,11 @@ IBB subnode optional properties: 
						already. If it it not specified, then

						output voltage can be configured to

						any value in the allowed limit.

- qcom,output-voltage-one-pulse			The expected voltage (in mV) of VDISN signal

						on the first SWIRE pulse. This property

						can be specified only if 'qpnp,swire-control'

						is defined. The minimum and maximum values

						are 1400mV and 7700mV.



Example:

	qcom,pmi8994@3 {

drivers/regulator/qpnp-labibb-regulator.c

+44 −0
Original line number Diff line number Diff line
@@ -138,6 +138,7 @@ 
#define REG_IBB_PWRUP_PWRDN_CTL_1	0x58

#define REG_IBB_PWRUP_PWRDN_CTL_2	0x59

#define REG_IBB_SOFT_START_CTL		0x5F

#define REG_IBB_SWIRE_CTL		0x5A

#define REG_IBB_SPARE_CTL		0x60

#define REG_IBB_NLIMIT_DAC		0x61
@@ -195,6 +196,14 @@ 
#define IBB_BYPASS_PWRDN_DLY2_BIT	BIT(5)

#define IBB_FAST_STARTUP		BIT(3)



/* REG_IBB_SWIRE_CTL */

#define IBB_OUTPUT_VOLTAGE_AT_ONE_PULSE_BITS	6

#define IBB_OUTPUT_VOLTAGE_AT_ONE_PULSE_MASK \

		((1 << IBB_OUTPUT_VOLTAGE_AT_ONE_PULSE_BITS) - 1)

#define MAX_OUTPUT_PULSE_VOLTAGE_MV	7700

#define MIN_OUTPUT_PULSE_VOLTAGE_MV	1400

#define OUTPUT_VOLTAGE_STEP_MV		100



/* REG_IBB_NLIMIT_DAC */

#define IBB_NLIMIT_DAC_EN		0x0

#define IBB_NLIMIT_DAC_DISABLE		0x5
@@ -2158,6 +2167,41 @@ static int register_qpnp_ibb_regulator(struct qpnp_labibb *labibb, 
		labibb->ttw_en = false;

	}



	if (of_find_property(of_node, "qcom,output-voltage-one-pulse", NULL)) {

		if (!labibb->swire_control) {

			pr_err("Invalid property 'qcom,output-voltage-one-pulse', valid only in SWIRE config\n");

			return -EINVAL;

		}

		rc = of_property_read_u32(of_node,

				"qcom,output-voltage-one-pulse", &tmp);

		if (rc) {

			pr_err("failed to read qcom,output-voltage-one-pulse rc=%d\n",

									rc);

			return rc;

		}

		if (tmp > MAX_OUTPUT_PULSE_VOLTAGE_MV ||

					tmp < MIN_OUTPUT_PULSE_VOLTAGE_MV) {

			pr_err("Invalid one-pulse voltage range %d\n", tmp);

			return -EINVAL;

		}



		/*

		 * Set the output voltage 100mV lower as the IBB HW module

		 * counts one pulse less in SWIRE mode.

		 */

		val = DIV_ROUND_UP((tmp - MIN_OUTPUT_PULSE_VOLTAGE_MV),

						OUTPUT_VOLTAGE_STEP_MV) - 1;

		rc = qpnp_labibb_masked_write(labibb, labibb->ibb_base +

					REG_IBB_SWIRE_CTL,

					IBB_OUTPUT_VOLTAGE_AT_ONE_PULSE_MASK,

					val);

		if (rc) {

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

				REG_IBB_SWIRE_CTL, rc);

			return rc;

		}

	}



	rc = qpnp_labibb_read(labibb, &ibb_enable_ctl,

				labibb->ibb_base + REG_IBB_ENABLE_CTL, 1);

	if (rc) {