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Commit 79610859 authored by Satish kumar sugasi's avatar Satish kumar sugasi Committed by Gerrit - the friendly Code Review server
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Bluetooth: Add support to get chipset version from device tree 



parse compatible flag from BT Device tree to get Bluetooth
chipset version and send to userspace via ioctl call.

Change-Id: Iddcae25df2e854a55a745bc127277552a799e3e4
Signed-off-by: default avatarSatish kumar sugasi <ssugas@codeaurora.org>
parent 885277a7

drivers/bluetooth/btpower.c

+44 −1
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/slab.h>

#include <linux/regulator/consumer.h>

#include <linux/clk.h>

#include <linux/uaccess.h>

#include <linux/btpower.h>



#if defined CONFIG_BT_SLIM_QCA6390 || \
@@ -50,6 +51,7 @@ static struct bt_power_vreg_data bt_power_vreg_info[] = { 
static int bt_power_vreg_get(struct platform_device *pdev);

static int bt_power_vreg_set(enum bt_power_modes mode);

static void bt_power_vreg_put(void);

static int bt_dt_parse_chipset_info(struct device *dev);



static struct bluetooth_power_platform_data *bt_power_pdata;

static struct platform_device *btpdev;
@@ -460,6 +462,30 @@ static int bt_dt_parse_clk_info(struct device *dev, 
	return ret;

}



static int bt_dt_parse_chipset_info(struct device *dev)

{

	int ret = -EINVAL;

	struct device_node *np = dev->of_node;



	/* Allocated 32 byte size buffer for compatible string */

	bt_power_pdata->compatible_chipset_version = devm_kzalloc(dev,

					MAX_PROP_SIZE, GFP_KERNEL);

	if (bt_power_pdata->compatible_chipset_version == NULL) {

		ret = -ENOMEM;

		return ret;

	}

	ret = of_property_read_string(np, "compatible",

			&bt_power_pdata->compatible_chipset_version);

	if (ret < 0) {

		pr_err("%s: reading \"compatible\" failed\n",

			__func__);

	} else {

		pr_debug("%s: compatible =%s\n", __func__,

			bt_power_pdata->compatible_chipset_version);

	}

	return ret;

}



static int bt_power_vreg_get(struct platform_device *pdev)

{

	struct bt_power_vreg_data *vreg_info;
@@ -568,6 +594,10 @@ static int bt_power_populate_dt_pinfo(struct platform_device *pdev) 
		if (rc < 0)

			pr_err("%s: clock not provided in device tree\n",

				__func__);

		rc = bt_dt_parse_chipset_info(&pdev->dev);

		if (rc < 0)

			pr_err("%s: compatible not provided in device tree\n",

				__func__);

	}



	bt_power_pdata->bt_power_setup = bluetooth_power;
@@ -693,10 +723,23 @@ static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
		if (chipset_version) {

			soc_id = chipset_version;

		} else {

			pr_err("%s: got invalid soc version\n");

			pr_err("%s: got invalid soc version\n", __func__);

			soc_id = 0;

		}

		break;

	case BT_CMD_GET_CHIPSET_ID:

		if (bt_power_pdata->compatible_chipset_version) {

			if (copy_to_user((void __user *)arg,

				bt_power_pdata->compatible_chipset_version,

				MAX_PROP_SIZE)) {

				pr_err("%s: copy to user failed\n", __func__);

				ret = -EFAULT;

			}

		} else {

			pr_err("%s: compatible string not valid\n", __func__);

			ret = -EINVAL;

		}

		break;

	default:

		return -ENOIOCTLCMD;

	}

include/linux/btpower.h

+3 −1
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.

 * Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.

 */



#ifndef __LINUX_BLUETOOTH_POWER_H
@@ -43,6 +43,7 @@ struct bluetooth_power_platform_data { 
	struct bt_power_vreg_data *vreg_info;  /* VDDIO voltage regulator */

	struct bt_power_clk_data *bt_chip_clk; /* bluetooth reference clock */

	int (*bt_power_setup)(int id); /* Bluetooth power setup function */

	const char *compatible_chipset_version; /*Bluetooth chipset version */

};



int btpower_register_slimdev(struct device *dev);
@@ -51,4 +52,5 @@ int btpower_get_chipset_version(void); 
#define BT_CMD_SLIM_TEST		0xbfac

#define BT_CMD_PWR_CTRL			0xbfad

#define BT_CMD_CHIPSET_VERS		0xbfae

#define BT_CMD_GET_CHIPSET_ID		0xbfaf

#endif /* __LINUX_BLUETOOTH_POWER_H */