From d603e191bfd7da5dd2dcc28cef384b7aa0174ab7 Mon Sep 17 00:00:00 2001
From: Harish Bandi <hbandi@codeaurora.org>
Date: Fri, 17 Jul 2020 22:27:06 +0530
Subject: [PATCH] Bluetooth: Add the support for wcn3980 in SDM429w

Enable the new msm GPIO's to enable eLDO for
3.3v and 1.3v to turn on wcn3980.

Change-Id: Id476b187336906cddd66621471afa20dd8924b40
Signed-off-by: Harish Bandi <hbandi@codeaurora.org>
---
 drivers/bluetooth/bluetooth-power.c | 85 +++++++++++++++++++++++++++++
 include/linux/bluetooth-power.h     |  6 +-
 2 files changed, 90 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/bluetooth-power.c b/drivers/bluetooth/bluetooth-power.c
index d675fd83476e..b074c9c15279 100644
--- a/drivers/bluetooth/bluetooth-power.c
+++ b/drivers/bluetooth/bluetooth-power.c
@@ -242,6 +242,64 @@ static int bt_clk_disable(struct bt_power_clk_data *clk)
 	return rc;
 }
 
+static int bt_configure_gpios_2wcn(int on)
+{
+	int rc = 0;
+	int bt_3p3_en_gpio = bt_power_pdata->bt_gpio_3p3_en;
+	int bt_1p3_en_gpio = bt_power_pdata->bt_gpio_1p3_en;
+
+	BT_PWR_DBG("2wcn - bt_gpio= %d on: %d", bt_3p3_en_gpio, on);
+
+	if (on) {
+		rc = gpio_request(bt_3p3_en_gpio, "bt_3p3_en_n");
+		if (rc) {
+			BT_PWR_ERR("unable to request gpio %d (%d)\n",
+					bt_3p3_en_gpio, rc);
+			return rc;
+		}
+
+		rc = gpio_direction_output(bt_3p3_en_gpio, 0);
+		if (rc) {
+			BT_PWR_ERR("Unable to set direction\n");
+			return rc;
+		}
+		msleep(50);
+		rc = gpio_direction_output(bt_3p3_en_gpio, 1);
+		if (rc) {
+			BT_PWR_ERR("Unable to set direction\n");
+			return rc;
+		}
+		msleep(50);
+
+		rc = gpio_request(bt_1p3_en_gpio, "bt_1p3_en_n");
+		if (rc) {
+			BT_PWR_ERR("unable to request gpio %d (%d)\n",
+					bt_1p3_en_gpio, rc);
+			return rc;
+		}
+
+		rc = gpio_direction_output(bt_1p3_en_gpio, 0);
+		if (rc) {
+			BT_PWR_ERR("Unable to set direction\n");
+			return rc;
+		}
+		msleep(50);
+		rc = gpio_direction_output(bt_1p3_en_gpio, 1);
+		if (rc) {
+			BT_PWR_ERR("Unable to set direction\n");
+			return rc;
+		}
+		msleep(50);
+	} else {
+		gpio_set_value(bt_3p3_en_gpio, 0);
+		msleep(100);
+		gpio_set_value(bt_1p3_en_gpio, 0);
+		msleep(100);
+	}
+	return rc;
+}
+
+
 static int bt_configure_gpios(int on)
 {
 	int rc = 0;
@@ -305,12 +363,27 @@ static int bluetooth_power(int on)
 				goto gpio_fail;
 			}
 		}
+		if (bt_power_pdata->bt_gpio_3p3_en > 0) {
+			BT_PWR_ERR(
+			"bt_power gpio config start for  2wcn gpios");
+			rc = bt_configure_gpios_2wcn(on);
+			if (rc < 0) {
+				BT_PWR_ERR("bt_power gpio config failed");
+				goto gpio_fail;
+			}
+		}
 	} else {
 		if (bt_power_pdata->bt_gpio_sys_rst > 0)
 			bt_configure_gpios(on);
+		if (bt_power_pdata->bt_gpio_3p3_en > 0)
+			bt_configure_gpios_2wcn(on);
 gpio_fail:
 		if (bt_power_pdata->bt_gpio_sys_rst > 0)
 			gpio_free(bt_power_pdata->bt_gpio_sys_rst);
+		if (bt_power_pdata->bt_gpio_3p3_en > 0)
+			gpio_free(bt_power_pdata->bt_gpio_3p3_en);
+		if (bt_power_pdata->bt_gpio_1p3_en > 0)
+			gpio_free(bt_power_pdata->bt_gpio_1p3_en);
 		if (bt_power_pdata->bt_chip_clk)
 			bt_clk_disable(bt_power_pdata->bt_chip_clk);
 clk_fail:
@@ -584,6 +657,18 @@ static int bt_power_populate_dt_pinfo(struct platform_device *pdev)
 		if (bt_power_pdata->bt_gpio_sys_rst < 0)
 			BT_PWR_ERR("bt-reset-gpio not provided in device tree");
 
+		bt_power_pdata->bt_gpio_3p3_en =
+			of_get_named_gpio(pdev->dev.of_node,
+						"qca,bt-3P3-en-gpio", 0);
+		if (bt_power_pdata->bt_gpio_3p3_en < 0)
+			BT_PWR_INFO("bt-3P3-gpio not provided in devicetree");
+
+		bt_power_pdata->bt_gpio_1p3_en =
+			of_get_named_gpio(pdev->dev.of_node,
+						"qca,bt-1P3-en-gpio", 0);
+		if (bt_power_pdata->bt_gpio_1p3_en < 0)
+			BT_PWR_INFO("bt-1P3-gpio not provided in devicetree");
+
 		rc = bt_dt_parse_clk_info(&pdev->dev,
 					&bt_power_pdata->bt_chip_clk);
 		if (rc < 0)
diff --git a/include/linux/bluetooth-power.h b/include/linux/bluetooth-power.h
index 397c70578b90..5f72fc4e3e13 100644
--- a/include/linux/bluetooth-power.h
+++ b/include/linux/bluetooth-power.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2018,2020, 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
@@ -59,6 +59,10 @@ struct bt_power_clk_data {
 struct bluetooth_power_platform_data {
 	/* Bluetooth reset gpio */
 	int bt_gpio_sys_rst;
+	/* Bluetooth 3p3 gpio */
+	int bt_gpio_3p3_en;
+	/* Bluetooth 1p3 gpio */
+	int bt_gpio_1p3_en;
 	struct device *slim_dev;
 	/* VDDIO voltage regulator */
 	struct bt_power_vreg_data *vreg_info;