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Bluetooth: Add support to get chipset version from device tree

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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: Satish kumar sugasi <ssugas@codeaurora.org>
This commit is contained in:
Satish kumar sugasi 2020-03-26 11:33:40 -07:00 • committed by Gerrit - the friendly Code Review server
commit 79610859b3
2 changed files with 47 additions and 2 deletions
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45
drivers/bluetooth/btpower.c
View file

@ -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 @@ err:
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;
}

4
include/linux/btpower.h
View file

@ -1,6 +1,6 @@
/* 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 */