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Commit 151eb61f authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy Committed by Gerrit - the friendly Code Review server
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regulator: qpnp-labibb: add TTW support for pmi8998 



Add Tap To Wake (TTW) support for pmi8998 with the required
configuration per the hardware documentation.

CRs-Fixed: 2112943
Change-Id: Id733e16108d98efc6614e0f9eed3e11f677855e0
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
Signed-off-by: default avatarShilpa Suresh <sbsure@codeaurora.org>
parent dc5e3b50

drivers/regulator/qpnp-labibb-regulator.c

+45 −11
Original line number Diff line number Diff line 
/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2017, 2019, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -67,6 +67,7 @@ 
#define REG_LAB_PRECHARGE_CTL		0x5E

#define REG_LAB_SOFT_START_CTL		0x5F

#define REG_LAB_SPARE_CTL		0x60

#define REG_LAB_MISC_CTL		0x60 /* PMI8998/PM660A */

#define REG_LAB_PFM_CTL			0x62



/* LAB registers for PM660A */
@@ -139,6 +140,9 @@ 
#define LAB_SPARE_TOUCH_WAKE_BIT	BIT(3)

#define LAB_SPARE_DISABLE_SCP_BIT	BIT(0)



/* REG_LAB_MISC_CTL */

#define LAB_AUTO_GM_BIT			BIT(4)



/* REG_LAB_PFM_CTL */

#define LAB_PFM_EN_BIT			BIT(7)
@@ -1866,7 +1870,7 @@ static int qpnp_labibb_save_settings(struct qpnp_labibb *labibb) 
static int qpnp_labibb_ttw_enter_ibb_common(struct qpnp_labibb *labibb)

{

	int rc = 0;

	u8 val;

	u8 val, mask;



	val = 0;

	rc = qpnp_labibb_write(labibb, labibb->ibb_base + REG_IBB_PD_CTL,
@@ -1886,10 +1890,16 @@ static int qpnp_labibb_ttw_enter_ibb_common(struct qpnp_labibb *labibb) 
		return rc;

	}



	if (labibb->pmic_rev_id->pmic_subtype == PMI8998_SUBTYPE) {

		val = 0;

		mask = IBB_DIS_DLY_MASK;

	} else {

		val = IBB_WAIT_MBG_OK;

		mask = IBB_DIS_DLY_MASK | IBB_WAIT_MBG_OK;

	}



	rc = qpnp_labibb_sec_masked_write(labibb, labibb->ibb_base,

				REG_IBB_PWRUP_PWRDN_CTL_2,

				IBB_DIS_DLY_MASK | IBB_WAIT_MBG_OK, val);

				REG_IBB_PWRUP_PWRDN_CTL_2, mask, val);

	if (rc < 0) {

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

			REG_IBB_PWRUP_PWRDN_CTL_2, rc);
@@ -1965,7 +1975,7 @@ static int qpnp_labibb_ttw_enter_ibb_pmi8950(struct qpnp_labibb *labibb) 
static int qpnp_labibb_regulator_ttw_mode_enter(struct qpnp_labibb *labibb)

{

	int rc = 0;

	u8 val;

	u8 val, reg;



	/* Save the IBB settings before they get modified for TTW mode */

	if (!labibb->ibb_settings_saved) {
@@ -2027,10 +2037,17 @@ static int qpnp_labibb_regulator_ttw_mode_enter(struct qpnp_labibb *labibb) 
		}



		val = LAB_SPARE_DISABLE_SCP_BIT;



		if (labibb->pmic_rev_id->pmic_subtype != PMI8950_SUBTYPE)

			val |= LAB_SPARE_TOUCH_WAKE_BIT;

		rc = qpnp_labibb_write(labibb, labibb->lab_base +

				REG_LAB_SPARE_CTL, &val, 1);



		if (labibb->pmic_rev_id->pmic_subtype == PMI8998_SUBTYPE) {

			reg = REG_LAB_MISC_CTL;

			val |= LAB_AUTO_GM_BIT;

		} else {

			reg = REG_LAB_SPARE_CTL;

		}

		rc = qpnp_labibb_write(labibb, labibb->lab_base + reg, &val, 1);

		if (rc < 0) {

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

				REG_LAB_SPARE_CTL, rc);
@@ -2060,7 +2077,15 @@ static int qpnp_labibb_regulator_ttw_mode_enter(struct qpnp_labibb *labibb) 
	case PMI8950_SUBTYPE:

		rc = qpnp_labibb_ttw_enter_ibb_pmi8950(labibb);

		break;

	case PMI8998_SUBTYPE:

		rc = labibb->lab_ver_ops->ps_ctl(labibb, 70, true);

		if (rc < 0)

			break;



		rc = qpnp_ibb_ps_config(labibb, true);

		break;

	}



	if (rc < 0) {

		pr_err("Failed to configure TTW-enter for IBB rc=%d\n", rc);

		return rc;
@@ -2093,7 +2118,7 @@ static int qpnp_labibb_ttw_exit_ibb_common(struct qpnp_labibb *labibb) 
static int qpnp_labibb_regulator_ttw_mode_exit(struct qpnp_labibb *labibb)

{

	int rc = 0;

	u8 val;

	u8 val, reg;



	if (!labibb->ibb_settings_saved) {

		pr_err("IBB settings are not saved!\n");
@@ -2127,8 +2152,14 @@ static int qpnp_labibb_regulator_ttw_mode_exit(struct qpnp_labibb *labibb) 
		}



		val = 0;

		rc = qpnp_labibb_write(labibb, labibb->lab_base +

					REG_LAB_SPARE_CTL, &val, 1);

		if (labibb->pmic_rev_id->pmic_subtype == PMI8998_SUBTYPE) {

			reg = REG_LAB_MISC_CTL;

			val |= LAB_AUTO_GM_BIT;

		} else {

			reg = REG_LAB_SPARE_CTL;

		}



		rc = qpnp_labibb_write(labibb, labibb->lab_base + reg, &val, 1);

		if (rc < 0) {

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

					REG_LAB_SPARE_CTL, rc);
@@ -3969,6 +4000,9 @@ static int qpnp_labibb_check_ttw_supported(struct qpnp_labibb *labibb) 
	case PMI8950_SUBTYPE:

		/* TTW supported for all revisions */

		break;

	case PMI8998_SUBTYPE:

		/* TTW supported for all revisions */

		break;

	default:

		pr_info("TTW mode not supported for PMIC-subtype = %d\n",

					labibb->pmic_rev_id->pmic_subtype);