firmware/br-ext-chip-allwinner/board/v83x/kernel/patches/00000-drivers_misc_sunxi-rf_sunxi-wlan.c.patch

diff -drupN a/drivers/misc/sunxi-rf/sunxi-wlan.c b/drivers/misc/sunxi-rf/sunxi-wlan.c
--- a/drivers/misc/sunxi-rf/sunxi-wlan.c	1970-01-01 03:00:00.000000000 +0300
+++ b/drivers/misc/sunxi-rf/sunxi-wlan.c	2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,766 @@
+/*
+ * sunxi-wlan.c -- power on/off wlan part of SoC
+ *
+ * Copyright (c) 2019
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/of_gpio.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/rfkill.h>
+#include <linux/regulator/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/sunxi-gpio.h>
+#include <linux/etherdevice.h>
+#include <linux/crypto.h>
+#include <linux/miscdevice.h>
+#include <linux/capability.h>
+#include <linux/pm_wakeirq.h>
+
+#include "sunxi-rfkill.h"
+
+#if defined(CONFIG_IO_EXPAND)
+/*
+ *for R6 scheme which use virtual extended gpio.
+ *if the virtual extended gpio is not used,
+ *just remove this macro
+ */
+#define VIRTUAL_EXTENDED_GPIO 1
+#endif
+
+static struct sunxi_wlan_platdata *wlan_data;
+
+static int sunxi_wlan_on(struct sunxi_wlan_platdata *data, bool on_off);
+static DEFINE_MUTEX(sunxi_wlan_mutex);
+
+void sunxi_wl_chipen_set(int dev, int on_off)
+{
+	/* Only wifi and bt both close, chip_en goes down,
+	 * otherwise, set chip_en up to keep module work.
+	 * dev   : device to set power status. 0: wifi, 1: bt
+	 * on_off: power status to set. 0: off, 1: on
+	 */
+	static int power_state;
+
+	if (dev == 0) {  /* 0 for wifi */
+		power_state &= ~(0x1);
+		power_state |=  (on_off > 0);
+	} else if (dev == 1) {  /* 1 for bt */
+		power_state &= ~(1<<1);
+		power_state |=  ((on_off > 0) << 1);
+	}
+
+	if (gpio_is_valid(wlan_data->gpio_chip_en)) {
+		if (!wlan_data->gpio_chip_en_invert) {
+			gpio_set_value(wlan_data->gpio_chip_en,
+				       (power_state != 0));
+		} else {
+			gpio_set_value(wlan_data->gpio_chip_en,
+				       (power_state == 0));
+		}
+	}
+}
+EXPORT_SYMBOL_GPL(sunxi_wl_chipen_set);
+
+void sunxi_wlan_set_power(bool on_off)
+{
+	struct platform_device *pdev;
+	int ret = 0;
+
+	if (!wlan_data)
+		return;
+
+	pdev = wlan_data->pdev;
+	mutex_lock(&sunxi_wlan_mutex);
+	if (on_off != wlan_data->power_state) {
+		ret = sunxi_wlan_on(wlan_data, on_off);
+		if (ret)
+			dev_err(&pdev->dev, "set power failed\n");
+	}
+
+	sunxi_wl_chipen_set(0, on_off);
+
+	mutex_unlock(&sunxi_wlan_mutex);
+}
+EXPORT_SYMBOL_GPL(sunxi_wlan_set_power);
+
+int sunxi_wlan_get_bus_index(void)
+{
+	struct platform_device *pdev;
+
+	if (!wlan_data)
+		return -EINVAL;
+
+	pdev = wlan_data->pdev;
+	dev_info(&pdev->dev, "bus_index: %d\n", wlan_data->bus_index);
+	return wlan_data->bus_index;
+}
+EXPORT_SYMBOL_GPL(sunxi_wlan_get_bus_index);
+
+int sunxi_wlan_get_oob_irq(void)
+{
+	struct platform_device *pdev;
+	int host_oob_irq = 0;
+
+	if (!wlan_data || !gpio_is_valid(wlan_data->gpio_wlan_hostwake))
+		return 0;
+
+	pdev = wlan_data->pdev;
+
+	host_oob_irq = gpio_to_irq(wlan_data->gpio_wlan_hostwake);
+	if (IS_ERR_VALUE(host_oob_irq))
+		dev_err(&pdev->dev, "map gpio [%d] to virq failed, errno = %d\n",
+			wlan_data->gpio_wlan_hostwake, host_oob_irq);
+
+	return host_oob_irq;
+}
+EXPORT_SYMBOL_GPL(sunxi_wlan_get_oob_irq);
+
+int sunxi_wlan_get_oob_irq_flags(void)
+{
+	int oob_irq_flags;
+
+	if (!wlan_data)
+		return 0;
+
+	oob_irq_flags = (IRQF_TRIGGER_HIGH | IRQF_SHARED | IRQF_NO_SUSPEND);
+
+	return oob_irq_flags;
+}
+EXPORT_SYMBOL_GPL(sunxi_wlan_get_oob_irq_flags);
+
+static int sunxi_wlan_on(struct sunxi_wlan_platdata *data, bool on_off)
+{
+	struct platform_device *pdev = data->pdev;
+	struct device *dev = &pdev->dev;
+	int ret = 0;
+	int i = 0;
+
+	if (!on_off && gpio_is_valid(data->gpio_wlan_regon))
+#if defined(VIRTUAL_EXTENDED_GPIO)
+		gpio_set_value_cansleep(data->gpio_wlan_regon, 0);
+#else
+		gpio_set_value(data->gpio_wlan_regon, 0);
+#endif
+
+	for (i = 0; i < (data->power_num); i++) {
+		if (data->wlan_power_name[i]) {
+			data->wlan_power[i] = regulator_get_optional(dev,
+				data->wlan_power_name[i]);
+			if (!IS_ERR(data->wlan_power[i])) {
+				if (on_off) {
+					ret =
+						regulator_set_voltage(data->wlan_power[i],
+							data->wlan_power_voltage,
+							data->wlan_power_voltage);
+					if (ret < 0) {
+						dev_err(dev, "set wlan_power voltage failed!\n");
+						regulator_put(data->wlan_power[i]);
+						return ret;
+					}
+
+					ret = regulator_enable(data->wlan_power[i]);
+					if (ret < 0) {
+						dev_err(dev, "regulator wlan_power enable failed\n");
+						regulator_put(data->wlan_power[i]);
+						return ret;
+					}
+
+					ret = regulator_get_voltage(data->wlan_power[i]);
+					if (ret < 0) {
+						dev_err(dev, "regulator wlan_power get voltage failed\n");
+						regulator_put(data->wlan_power[i]);
+						return ret;
+					}
+					dev_info(dev, "check wlan wlan_power voltage: %d\n", ret);
+				} else {
+					ret = regulator_disable(data->wlan_power[i]);
+					if (ret < 0) {
+						dev_err(dev, "regulator wlan_power disable failed\n");
+						regulator_put(data->wlan_power[i]);
+						return ret;
+					}
+				}
+				regulator_put(data->wlan_power[i]);
+			}
+		}
+	}
+
+	if (data->io_regulator_name) {
+		data->io_regulator = regulator_get_optional(dev,
+				data->io_regulator_name);
+		if (!IS_ERR(data->io_regulator)) {
+			if (on_off) {
+				ret = regulator_set_voltage(data->io_regulator,
+					data->wlan_io_voltage, data->wlan_io_voltage);
+				if (ret < 0) {
+					dev_err(dev, "set regulator io_regulator voltage failed!\n");
+					regulator_put(data->io_regulator);
+					return ret;
+				}
+
+				ret = regulator_enable(data->io_regulator);
+				if (ret < 0) {
+					dev_err(dev, "regulator io_regulator enable failed\n");
+					regulator_put(data->io_regulator);
+					return ret;
+				}
+
+				ret = regulator_get_voltage(data->io_regulator);
+				if (ret < 0) {
+					dev_err(dev, "regulator io_regulator get voltage failed\n");
+					regulator_put(data->io_regulator);
+					return ret;
+				}
+				dev_info(dev, "check wlan io_regulator voltage: %d\n", ret);
+			} else {
+				ret = regulator_disable(data->io_regulator);
+				if (ret < 0) {
+					dev_err(dev, "regulator io_regulator disable failed\n");
+					regulator_put(data->io_regulator);
+					return ret;
+				}
+			}
+			regulator_put(data->io_regulator);
+		}
+	}
+
+	if (on_off && gpio_is_valid(data->gpio_wlan_regon)) {
+		mdelay(10);
+#if defined(VIRTUAL_EXTENDED_GPIO)
+		gpio_set_value_cansleep(data->gpio_wlan_regon, 1);
+#else
+		gpio_set_value(data->gpio_wlan_regon, 1);
+#endif
+	}
+	wlan_data->power_state = on_off;
+
+	return 0;
+}
+
+static ssize_t power_state_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", wlan_data->power_state);
+}
+
+static ssize_t power_state_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	unsigned long state;
+	int err;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	err = kstrtoul(buf, 0, &state);
+	if (err)
+		return err;
+
+	if (state > 1)
+		return -EINVAL;
+
+	mutex_lock(&sunxi_wlan_mutex);
+	if (state != wlan_data->power_state) {
+		err = sunxi_wlan_on(wlan_data, state);
+		if (err)
+			dev_err(dev, "set power failed\n");
+	}
+	mutex_unlock(&sunxi_wlan_mutex);
+
+	return count;
+}
+
+static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
+		power_state_show, power_state_store);
+
+static ssize_t scan_device_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	unsigned long state;
+	int err;
+	int bus = wlan_data->bus_index;
+
+	err = kstrtoul(buf, 0, &state);
+	if (err)
+		return err;
+
+	sunxi_wl_chipen_set(0, state);
+
+	dev_info(dev, "start scan device on bus_index: %d\n",
+			wlan_data->bus_index);
+	if (bus < 0) {
+		dev_err(dev, "scan device fail!\n");
+		return -1;
+	}
+	sunxi_mmc_rescan_card(bus);
+
+	return count;
+}
+
+static DEVICE_ATTR(scan_device, S_IRUGO | S_IWUSR,
+		NULL, scan_device_store);
+
+static struct attribute *misc_attributes[] = {
+	&dev_attr_power_state.attr,
+	&dev_attr_scan_device.attr,
+	NULL,
+};
+
+static struct attribute_group misc_attribute_group = {
+	.name  = "rf-ctrl",
+	.attrs = misc_attributes,
+};
+
+static struct miscdevice sunxi_wlan_dev = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name  = "sunxi-wlan",
+};
+
+static char wifi_mac_str[18] = {0};
+
+void sunxi_wlan_chipid_mac_address(u8 *mac)
+{
+#define MD5_SIZE	16
+#define CHIP_SIZE	16
+
+	struct crypto_hash *tfm;
+	struct hash_desc desc;
+	struct scatterlist sg;
+	u8 result[MD5_SIZE];
+	u8 chipid[CHIP_SIZE];
+	int i = 0;
+	int ret = -1;
+
+	memset(chipid, 0, sizeof(chipid));
+	memset(result, 0, sizeof(result));
+
+	sunxi_get_soc_chipid((u8 *)chipid);
+
+	tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(tfm)) {
+		pr_err("Failed to alloc md5\n");
+		return;
+	}
+	desc.tfm = tfm;
+	desc.flags = 0;
+
+	ret = crypto_hash_init(&desc);
+	if (ret < 0) {
+		pr_err("crypto_hash_init() failed\n");
+		goto out;
+	}
+
+	sg_init_one(&sg, chipid, sizeof(chipid) - 1);
+	ret = crypto_hash_update(&desc, &sg, sizeof(chipid) - 1);
+	if (ret < 0) {
+		pr_err("crypto_hash_update() failed for id\n");
+		goto out;
+	}
+
+	crypto_hash_final(&desc, result);
+	if (ret < 0) {
+		pr_err("crypto_hash_final() failed for result\n");
+		goto out;
+	}
+
+	/* Choose md5 result's [0][2][4][6][8][10] byte as mac address */
+	for (i = 0; i < 6; i++)
+		mac[i] = result[2*i];
+	mac[0] &= 0xfe;     /* clear multicast bit */
+	mac[0] &= 0xfd;     /* clear local assignment bit (IEEE802) */
+
+out:
+	crypto_free_hash(tfm);
+}
+EXPORT_SYMBOL(sunxi_wlan_chipid_mac_address);
+
+void sunxi_wlan_custom_mac_address(u8 *mac)
+{
+	int i;
+	char *p = wifi_mac_str;
+	u8 mac_addr[ETH_ALEN] = {0};
+
+	if (0 == strlen(p))
+		return;
+
+	for (i = 0; i < ETH_ALEN; i++, p++)
+		mac_addr[i] = simple_strtoul(p, &p, 16);
+
+	memcpy(mac, mac_addr, sizeof(mac_addr));
+}
+EXPORT_SYMBOL(sunxi_wlan_custom_mac_address);
+
+#ifndef MODULE
+static int __init set_wlan_mac_addr(char *str)
+{
+	char *p = str;
+
+	if (str != NULL && *str)
+		strlcpy(wifi_mac_str, p, 18);
+
+	return 0;
+}
+__setup("wifi_mac=", set_wlan_mac_addr);
+#endif
+
+static int sunxi_wlan_probe(struct platform_device *pdev)
+{
+	struct pinctrl *pinctrl;
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct sunxi_wlan_platdata *data;
+	struct gpio_config config;
+
+	const char *power, *io_regulator, *clocks;
+
+	int ret = 0;
+	u32 val;
+	int i = 0, j = 0;
+	char wlan_name_buf[64] = {0}, s[64] = {0};
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	data->pdev = pdev;
+	wlan_data = data;
+
+	data->bus_index = -1;
+	if (!of_property_read_u32(np, "wlan_busnum", &val)) {
+		switch (val) {
+		case 0:
+		case 1:
+		case 2:
+			data->bus_index = val;
+			break;
+		default:
+			dev_err(dev, "unsupported wlan_busnum (%u)\n", val);
+			return -EINVAL;
+		}
+	}
+	dev_info(dev, "wlan_busnum (%u)\n", data->bus_index);
+
+	data->wlan_power_voltage = 3300000;
+	if (!of_property_read_u32(np, "wlan_power_voltage", &val)) {
+		data->wlan_power_voltage = val;
+		dev_err(dev, "wlan power voltage (%u)\n", val);
+	}
+
+	data->wlan_io_voltage = 1800000;
+	if (!of_property_read_u32(np, "wlan_io_voltage", &val)) {
+		data->wlan_io_voltage = val;
+		dev_err(dev, "wlan io voltage (%u)\n", val);
+	}
+
+	data->power_num = -1;
+	if (!of_property_read_u32(np, "wlan_power_num", &val)) {
+		switch (val) {
+		case 0:
+		case 1:
+		case 2:
+		case 3:
+		case 4:
+		case 5:
+			data->power_num = val;
+			break;
+		default:
+			dev_err(dev, "unsupported wlan_power_num (%u)\n", val);
+			return -EINVAL;
+		}
+	}
+	dev_info(dev, "wlan_power_num (%d)\n", data->power_num);
+
+	if (data->power_num > 0) {
+		data->wlan_power_name =
+		    devm_kzalloc(dev, (data->power_num) * sizeof(char *),
+				 GFP_KERNEL);
+		for (i = 0; i < (data->power_num); i++) {
+			sprintf(s, "wlan_power%d", i + 1);
+			strcpy(wlan_name_buf, s);
+			if (of_property_read_string(np, wlan_name_buf, &power)) {
+				dev_warn(dev, "Missing wlan_power.\n");
+			} else {
+				data->wlan_power_name[i] =
+				    devm_kzalloc(dev, 64, GFP_KERNEL);
+				if (data->wlan_power_name[i]) {
+					strcpy(data->wlan_power_name[i], power);
+				} else {
+					for (j = 0; j < i; j++) {
+						devm_kfree(dev,
+							   data->
+							   wlan_power_name[j]);
+					}
+					devm_kfree(dev, data->wlan_power_name);
+					devm_kfree(dev, data);
+					return -ENOMEM;
+				}
+			}
+			dev_info(dev, "wlan_power_name (%s)\n",
+				 data->wlan_power_name[i]);
+		}
+	}
+
+	if (of_property_read_string(np, "wlan_io_regulator", &io_regulator)) {
+		dev_warn(dev, "Missing wlan_io_regulator.\n");
+	} else {
+		data->io_regulator_name = devm_kzalloc(dev, 64, GFP_KERNEL);
+		if (!data->io_regulator_name) {
+			ret = -ENOMEM;
+			goto end;
+		} else
+			strcpy(data->io_regulator_name, io_regulator);
+	}
+	dev_info(dev, "io_regulator_name (%s)\n", data->io_regulator_name);
+
+	/* request device pinctrl, set as default state */
+	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+	if (IS_ERR_OR_NULL(pinctrl)) {
+		dev_err(dev, "request pincrtl handle for device [%s] failed\n",
+			dev_name(&pdev->dev));
+	}
+#if defined(VIRTUAL_EXTENDED_GPIO)
+	dev_info(dev, "------SUNXI_RF: Set regon for SUN3IW1P1_R6!----\n");
+	val = 0;
+	of_property_read_u32(np, "wlan_board_sel", &val);
+	if (val) {
+		if (!of_property_read_u32(np, "wlan_regon", &val)) {
+			data->gpio_wlan_regon = (int)val;
+		} else {
+			dev_err(dev, "unsupported wlan_regon(%u)\n", val);
+			goto end;
+		}
+	} else {
+		data->gpio_wlan_regon =
+		    of_get_named_gpio_flags(np, "wlan_regon", 0,
+					    (enum of_gpio_flags *)&config);
+	}
+#else
+	data->gpio_wlan_regon = of_get_named_gpio_flags(np, "wlan_regon", 0,
+							(enum of_gpio_flags *)
+							&config);
+#endif
+	if (!gpio_is_valid(data->gpio_wlan_regon)) {
+		dev_err(dev, "get gpio wlan_regon failed\n");
+	} else {
+		dev_info(dev, "wlan_regon gpio=%d  mul-sel=%d  pull=%d  drv_level=%d  data=%d\n",
+				config.gpio,
+				config.mul_sel,
+				config.pull,
+				config.drv_level,
+				config.data);
+
+		ret = devm_gpio_request(dev, data->gpio_wlan_regon,
+				"wlan_regon");
+		if (ret < 0) {
+			dev_err(dev, "can't request wlan_regon gpio %d\n",
+				data->gpio_wlan_regon);
+			goto end;
+		}
+
+		ret = gpio_direction_output(data->gpio_wlan_regon, 0);
+		if (ret < 0) {
+			dev_err(dev, "can't request output direction wlan_regon gpio %d\n",
+				data->gpio_wlan_regon);
+			goto end;
+		}
+	}
+
+	data->gpio_chip_en = of_get_named_gpio_flags(np, "chip_en",
+			0, (enum of_gpio_flags *)&config);
+	if (!gpio_is_valid(data->gpio_chip_en)) {
+		dev_err(dev, "get gpio chip_en failed\n");
+	} else {
+		dev_info(dev, "chip_en gpio=%d  mul-sel=%d  pull=%d  drv_level=%d  data=%d\n",
+				config.gpio,
+				config.mul_sel,
+				config.pull,
+				config.drv_level,
+				config.data);
+
+		ret = devm_gpio_request(dev, data->gpio_chip_en, "chip_en");
+		if (ret < 0) {
+			dev_err(dev, "can't request chip_en gpio %d\n",
+				data->gpio_chip_en);
+			goto end;
+		}
+
+		ret = gpio_direction_output(data->gpio_chip_en, 0);
+		if (ret < 0) {
+			dev_err(dev, "can't request output direction chip_en gpio %d\n",
+				data->gpio_chip_en);
+			goto end;
+		}
+	}
+
+	if (!of_property_read_u32(np, "chip_en_invert", &val)) {
+		if (val > 0)
+			data->gpio_chip_en_invert = 1;
+		else
+			data->gpio_chip_en_invert = 0;
+	} else {
+		data->gpio_chip_en_invert = 0;
+	}
+
+	data->gpio_wlan_hostwake = of_get_named_gpio_flags(np, "wlan_hostwake",
+			0, (enum of_gpio_flags *)&config);
+	if (!gpio_is_valid(data->gpio_wlan_hostwake)) {
+		dev_err(dev, "get gpio wlan_hostwake failed\n");
+	} else {
+		dev_info(dev,
+				"wlan_hostwake gpio=%d  mul-sel=%d  pull=%d  drv_level=%d  data=%d\n",
+				config.gpio,
+				config.mul_sel,
+				config.pull,
+				config.drv_level,
+				config.data);
+
+		ret = devm_gpio_request(dev, data->gpio_wlan_hostwake,
+				"wlan_hostwake");
+		if (ret < 0) {
+			dev_err(dev, "can't request wlan_hostwake gpio %d\n",
+				data->gpio_wlan_hostwake);
+			goto end;
+		}
+
+		ret = gpio_direction_input(data->gpio_wlan_hostwake);
+		if (ret < 0) {
+			dev_err(dev,
+				"can't request input direction wlan_hostwake gpio %d\n",
+				data->gpio_wlan_hostwake);
+			goto end;
+		}
+
+		/*
+		 * wakeup_source relys on wlan_hostwake, if wlan_hostwake gpio
+		 * isn't configured, then whether wakeup_source is configured
+		 * or not is unmeaningful.
+		 */
+		if (!of_property_read_u32(np, "wakeup_source",
+				&data->wakeup_enable) && (data->wakeup_enable == 0)) {
+			dev_warn(dev, "wakeup source is disabled!\n");
+		} else {
+			ret = device_init_wakeup(dev, true);
+			if (ret < 0) {
+				dev_err(dev, "device init wakeup failed!\n");
+				return ret;
+			}
+
+			ret = dev_pm_set_wake_irq(dev, gpio_to_irq(data->gpio_wlan_hostwake));
+			if (ret < 0) {
+				dev_err(dev, "can't enable wakeup src for wlan_hostwake %d\n",
+				data->gpio_wlan_hostwake);
+				return ret;
+			}
+			data->wakeup_enable = 1;
+		}
+	}
+
+	if (of_property_read_string(np, "clocks", &clocks)) {
+		dev_warn(dev, "Missing clocks.\n");
+	} else {
+		data->clk_name = devm_kzalloc(dev, 64, GFP_KERNEL);
+		if (!data->clk_name) {
+			ret = -ENOMEM;
+			goto end;
+		} else
+			strcpy(data->clk_name, clocks);
+	}
+	dev_info(dev, "clk_name (%s)\n", data->clk_name);
+
+	data->lpo = devm_clk_get(dev, NULL);
+	if (IS_ERR_OR_NULL(data->lpo)) {
+		dev_warn(dev, "clk not config\n");
+	} else {
+		ret = clk_prepare_enable(data->lpo);
+		if (ret < 0)
+			dev_warn(dev, "can't enable clk\n");
+	}
+
+	ret = misc_register(&sunxi_wlan_dev);
+	if (ret) {
+		dev_err(dev, "sunxi-wlan register driver as misc device error!\n");
+		goto end;
+	}
+
+	ret = sysfs_create_group(&sunxi_wlan_dev.this_device->kobj,
+			&misc_attribute_group);
+	if (ret) {
+		dev_err(dev, "sunxi-wlan register sysfs create group failed!\n");
+		goto end;
+	}
+
+	data->power_state = 0;
+end:
+	if (ret != 0) {
+		for (i = 0; i < (wlan_data->power_num); i++)
+			devm_kfree(dev, data->wlan_power_name[i]);
+		devm_kfree(dev, data->wlan_power_name);
+		devm_kfree(dev, data);
+		return ret;
+	}
+
+	data->wlan_power =
+	    devm_kzalloc(dev, (data->power_num) * sizeof(struct regulator *),
+			 GFP_KERNEL);
+	return 0;
+}
+
+static int sunxi_wlan_remove(struct platform_device *pdev)
+{
+	int i = 0;
+
+	devm_kfree(&pdev->dev, wlan_data->wlan_power);
+	for (i = 0; i < (wlan_data->power_num); i++)
+		devm_kfree(&pdev->dev, wlan_data->wlan_power_name[i]);
+	devm_kfree(&pdev->dev, wlan_data->wlan_power_name);
+	devm_kfree(&pdev->dev, wlan_data);
+
+	misc_deregister(&sunxi_wlan_dev);
+	sysfs_remove_group(&(sunxi_wlan_dev.this_device->kobj),
+			&misc_attribute_group);
+
+	if (!IS_ERR_OR_NULL(wlan_data->lpo))
+		clk_disable_unprepare(wlan_data->lpo);
+
+	if (wlan_data->wakeup_enable) {
+		dev_info(&pdev->dev, "Deinit wakeup source");
+		device_init_wakeup(&pdev->dev, false);
+		dev_pm_clear_wake_irq(&pdev->dev);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id sunxi_wlan_ids[] = {
+	{ .compatible = "allwinner,sunxi-wlan" },
+	{ /* Sentinel */ }
+};
+
+static struct platform_driver sunxi_wlan_driver = {
+	.probe		= sunxi_wlan_probe,
+	.remove	= sunxi_wlan_remove,
+	.driver	= {
+		.owner	= THIS_MODULE,
+		.name	= "sunxi-wlan",
+		.of_match_table	= sunxi_wlan_ids,
+	},
+};
+
+module_platform_driver(sunxi_wlan_driver);
+
+MODULE_DESCRIPTION("sunxi wlan driver");
+MODULE_LICENSE("GPL");