cnss2: Add sysfs entry for charger mode

WLAN is not needed in charger mode. Thus add a sysfs entry to notify
charger mode to cnss platform driver to ignore wlan initialization
request.

Change-Id: I4719b16e7fa6914c253018284b5a5d80acf14bbb

cnss2/main.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/delay.h>
@@ -3419,6 +3419,21 @@ static ssize_t hw_trace_override_store(struct device *dev,
 	return count;
 }
 
+static ssize_t charger_mode_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct cnss_plat_data *plat_priv = dev_get_drvdata(dev);
+	int tmp = 0;
+
+	if (sscanf(buf, "%du", &tmp) != 1)
+		return -EINVAL;
+
+	plat_priv->charger_mode = tmp;
+	cnss_pr_dbg("Received Charger Mode: %d\n", tmp);
+	return count;
+}
+
 static DEVICE_ATTR_WO(fs_ready);
 static DEVICE_ATTR_WO(shutdown);
 static DEVICE_ATTR_WO(recovery);
@@ -3427,6 +3442,7 @@ static DEVICE_ATTR_WO(qdss_trace_start);
 static DEVICE_ATTR_WO(qdss_trace_stop);
 static DEVICE_ATTR_WO(qdss_conf_download);
 static DEVICE_ATTR_WO(hw_trace_override);
+static DEVICE_ATTR_WO(charger_mode);
 
 static struct attribute *cnss_attrs[] = {
 	&dev_attr_fs_ready.attr,
@@ -3437,6 +3453,7 @@ static struct attribute *cnss_attrs[] = {
 	&dev_attr_qdss_trace_stop.attr,
 	&dev_attr_qdss_conf_download.attr,
 	&dev_attr_hw_trace_override.attr,
+	&dev_attr_charger_mode.attr,
 	NULL,
 };
 

cnss2/main.h

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #ifndef _CNSS_MAIN_H
@@ -529,6 +529,7 @@ struct cnss_plat_data {
 	struct cnss_dms_data dms;
 	int power_up_error;
 	u32 hw_trc_override;
+	u8 charger_mode;
 	struct mbox_client mbox_client_data;
 	struct mbox_chan *mbox_chan;
 	const char *vreg_ol_cpr, *vreg_ipa;

cnss2/pci.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/cma.h>
@@ -3197,6 +3197,10 @@ static void cnss_wlan_reg_driver_work(struct work_struct *work)
 	} else {
 		cnss_pr_err("Timeout waiting for calibration to complete\n");
 		del_timer(&plat_priv->fw_boot_timer);
+		if (plat_priv->charger_mode) {
+			cnss_pr_err("Ignore calibration timeout in charger mode\n");
+			return;
+		}
 		if (!test_bit(CNSS_IN_REBOOT, &plat_priv->driver_state))
 			CNSS_ASSERT(0);
 		cal_info = kzalloc(sizeof(*cal_info), GFP_KERNEL);