Merge "cnss2: Check for BT Enable GPIO in QCA6490" (3d7208ef) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/net/wireless/cnss2/main.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -89,6 +89,7 @@ struct cnss_pinctrl_info {
		struct pinctrl_state *bootstrap_active;
		struct pinctrl_state *wlan_en_active;
		struct pinctrl_state *wlan_en_sleep;
		int bt_en_gpio;
		};

		#if IS_ENABLED(CONFIG_MSM_SUBSYSTEM_RESTART)

drivers/net/wireless/cnss2/power.c

+53 −1

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@
		#include <linux/pinctrl/consumer.h>
		#include <linux/regulator/consumer.h>
		#include <soc/qcom/cmd-db.h>
		#include <linux/of_gpio.h>

		#include "main.h"
		#include "debug.h"
		@@ -41,6 +42,7 @@ static struct cnss_clk_cfg cnss_clk_list[] = {
		#define BOOTSTRAP_GPIO "qcom,enable-bootstrap-gpio"
		#define BOOTSTRAP_ACTIVE "bootstrap_active"
		#define WLAN_EN_GPIO "wlan-en-gpio"
		#define BT_EN_GPIO "qcom,bt-en-gpio"
		#define WLAN_EN_ACTIVE "wlan_en_active"
		#define WLAN_EN_SLEEP "wlan_en_sleep"

		@@ -700,6 +702,15 @@ int cnss_get_pinctrl(struct cnss_plat_data *plat_priv)
		}
		}

		/* Added for QCA6490 PMU delayed WLAN_EN_GPIO */
		if (of_find_property(dev->of_node, BT_EN_GPIO, NULL)) {
		pinctrl_info->bt_en_gpio = of_get_named_gpio(dev->of_node,
		BT_EN_GPIO, 0);
		cnss_pr_dbg("BT GPIO: %d\n", pinctrl_info->bt_en_gpio);
		} else {
		pinctrl_info->bt_en_gpio = -EINVAL;
		}

		return 0;
		out:
		return ret;
		@@ -763,6 +774,47 @@ static int cnss_select_pinctrl_state(struct cnss_plat_data *plat_priv,
		return ret;
		}

		/**
		* cnss_select_pinctrl_enable - select WLAN_GPIO for Active pinctrl status
		* @plat_priv: Platform private data structure pointer
		*
		* For QCA6490, PMU requires minimum 100ms delay between BT_EN_GPIO off and
		* WLAN_EN_GPIO on. This is done to avoid power up issues.
		*
		* Return: Status of pinctrl select operation. 0 - Success.
		*/
		static int cnss_select_pinctrl_enable(struct cnss_plat_data *plat_priv)
		{
		int ret = 0, bt_en_gpio = plat_priv->pinctrl_info.bt_en_gpio;
		u8 wlan_en_state = 0;

		if (bt_en_gpio < 0 \|\| plat_priv->device_id != QCA6490_DEVICE_ID)
		goto set_wlan_en;

		if (gpio_get_value(bt_en_gpio)) {
		cnss_pr_dbg("BT_EN_GPIO State: On\n");
		ret = cnss_select_pinctrl_state(plat_priv, true);
		if (!ret)
		return ret;
		wlan_en_state = 1;
		}
		if (!gpio_get_value(bt_en_gpio)) {
		cnss_pr_dbg("BT_EN_GPIO State: Off. Delay WLAN_GPIO enable\n");
		/* check for BT_EN_GPIO down race during above operation */
		if (wlan_en_state) {
		cnss_pr_dbg("Reset WLAN_EN as BT got turned off during enable\n");
		cnss_select_pinctrl_state(plat_priv, false);
		wlan_en_state = 0;
		}
		/* 100 ms delay for BT_EN and WLAN_EN QCA6490 PMU sequencing */
		msleep(100);
		}
		set_wlan_en:
		if (!wlan_en_state)
		ret = cnss_select_pinctrl_state(plat_priv, true);
		return ret;
		}

		int cnss_power_on_device(struct cnss_plat_data *plat_priv)
		{
		int ret = 0;
		@@ -784,7 +836,7 @@ int cnss_power_on_device(struct cnss_plat_data *plat_priv)
		goto vreg_off;
		}

		ret = cnss_select_pinctrl_state(plat_priv, true);
		ret = cnss_select_pinctrl_enable(plat_priv);
		if (ret) {
		cnss_pr_err("Failed to select pinctrl state, err = %d\n", ret);
		goto clk_off;