Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2029 insertions, 0 deletions

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
new file mode 100644
index 000000000..de03b8889
--- /dev/null
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -0,0 +1,2029 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
+ *
+ *  Copyright © 2010 Intel Corporation
+ *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/backlight.h>
+#include <linux/bitops.h>
+#include <linux/bug.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/dmi.h>
+#include <linux/fb.h>
+#include <linux/i8042.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/platform_profile.h>
+#include <linux/rfkill.h>
+#include <linux/seq_file.h>
+#include <linux/sysfs.h>
+#include <linux/types.h>
+#include <linux/wmi.h>
+
+#include <acpi/video.h>
+
+#include <dt-bindings/leds/common.h>
+
+#define IDEAPAD_RFKILL_DEV_NUM	3
+
+enum {
+	CFG_CAP_BT_BIT       = 16,
+	CFG_CAP_3G_BIT       = 17,
+	CFG_CAP_WIFI_BIT     = 18,
+	CFG_CAP_CAM_BIT      = 19,
+
+	/*
+	 * These are OnScreenDisplay support bits that can be useful to determine
+	 * whether a hotkey exists/should show OSD. But they aren't particularly
+	 * meaningful since they were introduced later, i.e. 2010 IdeaPads
+	 * don't have these, but they still have had OSD for hotkeys.
+	 */
+	CFG_OSD_NUMLK_BIT    = 27,
+	CFG_OSD_CAPSLK_BIT   = 28,
+	CFG_OSD_MICMUTE_BIT  = 29,
+	CFG_OSD_TOUCHPAD_BIT = 30,
+	CFG_OSD_CAM_BIT      = 31,
+};
+
+enum {
+	GBMD_CONSERVATION_STATE_BIT = 5,
+};
+
+enum {
+	SBMC_CONSERVATION_ON  = 3,
+	SBMC_CONSERVATION_OFF = 5,
+};
+
+enum {
+	HALS_KBD_BL_SUPPORT_BIT       = 4,
+	HALS_KBD_BL_STATE_BIT         = 5,
+	HALS_USB_CHARGING_SUPPORT_BIT = 6,
+	HALS_USB_CHARGING_STATE_BIT   = 7,
+	HALS_FNLOCK_SUPPORT_BIT       = 9,
+	HALS_FNLOCK_STATE_BIT         = 10,
+	HALS_HOTKEYS_PRIMARY_BIT      = 11,
+};
+
+enum {
+	SALS_KBD_BL_ON        = 0x8,
+	SALS_KBD_BL_OFF       = 0x9,
+	SALS_USB_CHARGING_ON  = 0xa,
+	SALS_USB_CHARGING_OFF = 0xb,
+	SALS_FNLOCK_ON        = 0xe,
+	SALS_FNLOCK_OFF       = 0xf,
+};
+
+enum {
+	VPCCMD_R_VPC1 = 0x10,
+	VPCCMD_R_BL_MAX,
+	VPCCMD_R_BL,
+	VPCCMD_W_BL,
+	VPCCMD_R_WIFI,
+	VPCCMD_W_WIFI,
+	VPCCMD_R_BT,
+	VPCCMD_W_BT,
+	VPCCMD_R_BL_POWER,
+	VPCCMD_R_NOVO,
+	VPCCMD_R_VPC2,
+	VPCCMD_R_TOUCHPAD,
+	VPCCMD_W_TOUCHPAD,
+	VPCCMD_R_CAMERA,
+	VPCCMD_W_CAMERA,
+	VPCCMD_R_3G,
+	VPCCMD_W_3G,
+	VPCCMD_R_ODD, /* 0x21 */
+	VPCCMD_W_FAN,
+	VPCCMD_R_RF,
+	VPCCMD_W_RF,
+	VPCCMD_R_FAN = 0x2B,
+	VPCCMD_R_SPECIAL_BUTTONS = 0x31,
+	VPCCMD_W_BL_POWER = 0x33,
+};
+
+struct ideapad_dytc_priv {
+	enum platform_profile_option current_profile;
+	struct platform_profile_handler pprof;
+	struct mutex mutex; /* protects the DYTC interface */
+	struct ideapad_private *priv;
+};
+
+struct ideapad_rfk_priv {
+	int dev;
+	struct ideapad_private *priv;
+};
+
+struct ideapad_private {
+	struct acpi_device *adev;
+	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
+	struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
+	struct platform_device *platform_device;
+	struct input_dev *inputdev;
+	struct backlight_device *blightdev;
+	struct ideapad_dytc_priv *dytc;
+	struct dentry *debug;
+	unsigned long cfg;
+	unsigned long r_touchpad_val;
+	struct {
+		bool conservation_mode    : 1;
+		bool dytc                 : 1;
+		bool fan_mode             : 1;
+		bool fn_lock              : 1;
+		bool set_fn_lock_led      : 1;
+		bool hw_rfkill_switch     : 1;
+		bool kbd_bl               : 1;
+		bool touchpad_ctrl_via_ec : 1;
+		bool ctrl_ps2_aux_port    : 1;
+		bool usb_charging         : 1;
+	} features;
+	struct {
+		bool initialized;
+		struct led_classdev led;
+		unsigned int last_brightness;
+	} kbd_bl;
+};
+
+static bool no_bt_rfkill;
+module_param(no_bt_rfkill, bool, 0444);
+MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
+
+static bool allow_v4_dytc;
+module_param(allow_v4_dytc, bool, 0444);
+MODULE_PARM_DESC(allow_v4_dytc,
+	"Enable DYTC version 4 platform-profile support. "
+	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
+
+static bool hw_rfkill_switch;
+module_param(hw_rfkill_switch, bool, 0444);
+MODULE_PARM_DESC(hw_rfkill_switch,
+	"Enable rfkill support for laptops with a hw on/off wifi switch/slider. "
+	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
+
+static bool set_fn_lock_led;
+module_param(set_fn_lock_led, bool, 0444);
+MODULE_PARM_DESC(set_fn_lock_led,
+	"Enable driver based updates of the fn-lock LED on fn-lock changes. "
+	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
+
+static bool ctrl_ps2_aux_port;
+module_param(ctrl_ps2_aux_port, bool, 0444);
+MODULE_PARM_DESC(ctrl_ps2_aux_port,
+	"Enable driver based PS/2 aux port en-/dis-abling on touchpad on/off toggle. "
+	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
+
+/*
+ * shared data
+ */
+
+static struct ideapad_private *ideapad_shared;
+static DEFINE_MUTEX(ideapad_shared_mutex);
+
+static int ideapad_shared_init(struct ideapad_private *priv)
+{
+	int ret;
+
+	mutex_lock(&ideapad_shared_mutex);
+
+	if (!ideapad_shared) {
+		ideapad_shared = priv;
+		ret = 0;
+	} else {
+		dev_warn(&priv->adev->dev, "found multiple platform devices\n");
+		ret = -EINVAL;
+	}
+
+	mutex_unlock(&ideapad_shared_mutex);
+
+	return ret;
+}
+
+static void ideapad_shared_exit(struct ideapad_private *priv)
+{
+	mutex_lock(&ideapad_shared_mutex);
+
+	if (ideapad_shared == priv)
+		ideapad_shared = NULL;
+
+	mutex_unlock(&ideapad_shared_mutex);
+}
+
+/*
+ * ACPI Helpers
+ */
+#define IDEAPAD_EC_TIMEOUT 200 /* in ms */
+
+static int eval_int(acpi_handle handle, const char *name, unsigned long *res)
+{
+	unsigned long long result;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(handle, (char *)name, NULL, &result);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*res = result;
+
+	return 0;
+}
+
+static int exec_simple_method(acpi_handle handle, const char *name, unsigned long arg)
+{
+	acpi_status status = acpi_execute_simple_method(handle, (char *)name, arg);
+
+	return ACPI_FAILURE(status) ? -EIO : 0;
+}
+
+static int eval_gbmd(acpi_handle handle, unsigned long *res)
+{
+	return eval_int(handle, "GBMD", res);
+}
+
+static int exec_sbmc(acpi_handle handle, unsigned long arg)
+{
+	return exec_simple_method(handle, "SBMC", arg);
+}
+
+static int eval_hals(acpi_handle handle, unsigned long *res)
+{
+	return eval_int(handle, "HALS", res);
+}
+
+static int exec_sals(acpi_handle handle, unsigned long arg)
+{
+	return exec_simple_method(handle, "SALS", arg);
+}
+
+static int eval_int_with_arg(acpi_handle handle, const char *name, unsigned long arg, unsigned long *res)
+{
+	struct acpi_object_list params;
+	unsigned long long result;
+	union acpi_object in_obj;
+	acpi_status status;
+
+	params.count = 1;
+	params.pointer = &in_obj;
+	in_obj.type = ACPI_TYPE_INTEGER;
+	in_obj.integer.value = arg;
+
+	status = acpi_evaluate_integer(handle, (char *)name, &params, &result);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	if (res)
+		*res = result;
+
+	return 0;
+}
+
+static int eval_dytc(acpi_handle handle, unsigned long cmd, unsigned long *res)
+{
+	return eval_int_with_arg(handle, "DYTC", cmd, res);
+}
+
+static int eval_vpcr(acpi_handle handle, unsigned long cmd, unsigned long *res)
+{
+	return eval_int_with_arg(handle, "VPCR", cmd, res);
+}
+
+static int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long data)
+{
+	struct acpi_object_list params;
+	union acpi_object in_obj[2];
+	acpi_status status;
+
+	params.count = 2;
+	params.pointer = in_obj;
+	in_obj[0].type = ACPI_TYPE_INTEGER;
+	in_obj[0].integer.value = cmd;
+	in_obj[1].type = ACPI_TYPE_INTEGER;
+	in_obj[1].integer.value = data;
+
+	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	return 0;
+}
+
+static int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *data)
+{
+	unsigned long end_jiffies, val;
+	int err;
+
+	err = eval_vpcw(handle, 1, cmd);
+	if (err)
+		return err;
+
+	end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
+
+	while (time_before(jiffies, end_jiffies)) {
+		schedule();
+
+		err = eval_vpcr(handle, 1, &val);
+		if (err)
+			return err;
+
+		if (val == 0)
+			return eval_vpcr(handle, 0, data);
+	}
+
+	acpi_handle_err(handle, "timeout in %s\n", __func__);
+
+	return -ETIMEDOUT;
+}
+
+static int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long data)
+{
+	unsigned long end_jiffies, val;
+	int err;
+
+	err = eval_vpcw(handle, 0, data);
+	if (err)
+		return err;
+
+	err = eval_vpcw(handle, 1, cmd);
+	if (err)
+		return err;
+
+	end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
+
+	while (time_before(jiffies, end_jiffies)) {
+		schedule();
+
+		err = eval_vpcr(handle, 1, &val);
+		if (err)
+			return err;
+
+		if (val == 0)
+			return 0;
+	}
+
+	acpi_handle_err(handle, "timeout in %s\n", __func__);
+
+	return -ETIMEDOUT;
+}
+
+/*
+ * debugfs
+ */
+static int debugfs_status_show(struct seq_file *s, void *data)
+{
+	struct ideapad_private *priv = s->private;
+	unsigned long value;
+
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
+		seq_printf(s, "Backlight max:  %lu\n", value);
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
+		seq_printf(s, "Backlight now:  %lu\n", value);
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
+		seq_printf(s, "BL power value: %s (%lu)\n", value ? "on" : "off", value);
+
+	seq_puts(s, "=====================\n");
+
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
+		seq_printf(s, "Radio status: %s (%lu)\n", value ? "on" : "off", value);
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
+		seq_printf(s, "Wifi status:  %s (%lu)\n", value ? "on" : "off", value);
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
+		seq_printf(s, "BT status:    %s (%lu)\n", value ? "on" : "off", value);
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
+		seq_printf(s, "3G status:    %s (%lu)\n", value ? "on" : "off", value);
+
+	seq_puts(s, "=====================\n");
+
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
+		seq_printf(s, "Touchpad status: %s (%lu)\n", value ? "on" : "off", value);
+	if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
+		seq_printf(s, "Camera status:   %s (%lu)\n", value ? "on" : "off", value);
+
+	seq_puts(s, "=====================\n");
+
+	if (!eval_gbmd(priv->adev->handle, &value))
+		seq_printf(s, "GBMD: %#010lx\n", value);
+	if (!eval_hals(priv->adev->handle, &value))
+		seq_printf(s, "HALS: %#010lx\n", value);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(debugfs_status);
+
+static int debugfs_cfg_show(struct seq_file *s, void *data)
+{
+	struct ideapad_private *priv = s->private;
+
+	seq_printf(s, "_CFG: %#010lx\n\n", priv->cfg);
+
+	seq_puts(s, "Capabilities:");
+	if (test_bit(CFG_CAP_BT_BIT, &priv->cfg))
+		seq_puts(s, " bluetooth");
+	if (test_bit(CFG_CAP_3G_BIT, &priv->cfg))
+		seq_puts(s, " 3G");
+	if (test_bit(CFG_CAP_WIFI_BIT, &priv->cfg))
+		seq_puts(s, " wifi");
+	if (test_bit(CFG_CAP_CAM_BIT, &priv->cfg))
+		seq_puts(s, " camera");
+	seq_puts(s, "\n");
+
+	seq_puts(s, "OSD support:");
+	if (test_bit(CFG_OSD_NUMLK_BIT, &priv->cfg))
+		seq_puts(s, " num-lock");
+	if (test_bit(CFG_OSD_CAPSLK_BIT, &priv->cfg))
+		seq_puts(s, " caps-lock");
+	if (test_bit(CFG_OSD_MICMUTE_BIT, &priv->cfg))
+		seq_puts(s, " mic-mute");
+	if (test_bit(CFG_OSD_TOUCHPAD_BIT, &priv->cfg))
+		seq_puts(s, " touchpad");
+	if (test_bit(CFG_OSD_CAM_BIT, &priv->cfg))
+		seq_puts(s, " camera");
+	seq_puts(s, "\n");
+
+	seq_puts(s, "Graphics: ");
+	switch (priv->cfg & 0x700) {
+	case 0x100:
+		seq_puts(s, "Intel");
+		break;
+	case 0x200:
+		seq_puts(s, "ATI");
+		break;
+	case 0x300:
+		seq_puts(s, "Nvidia");
+		break;
+	case 0x400:
+		seq_puts(s, "Intel and ATI");
+		break;
+	case 0x500:
+		seq_puts(s, "Intel and Nvidia");
+		break;
+	}
+	seq_puts(s, "\n");
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
+
+static void ideapad_debugfs_init(struct ideapad_private *priv)
+{
+	struct dentry *dir;
+
+	dir = debugfs_create_dir("ideapad", NULL);
+	priv->debug = dir;
+
+	debugfs_create_file("cfg", 0444, dir, priv, &debugfs_cfg_fops);
+	debugfs_create_file("status", 0444, dir, priv, &debugfs_status_fops);
+}
+
+static void ideapad_debugfs_exit(struct ideapad_private *priv)
+{
+	debugfs_remove_recursive(priv->debug);
+	priv->debug = NULL;
+}
+
+/*
+ * sysfs
+ */
+static ssize_t camera_power_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long result;
+	int err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result);
+	if (err)
+		return err;
+
+	return sysfs_emit(buf, "%d\n", !!result);
+}
+
+static ssize_t camera_power_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool state;
+	int err;
+
+	err = kstrtobool(buf, &state);
+	if (err)
+		return err;
+
+	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
+	if (err)
+		return err;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(camera_power);
+
+static ssize_t conservation_mode_show(struct device *dev,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long result;
+	int err;
+
+	err = eval_gbmd(priv->adev->handle, &result);
+	if (err)
+		return err;
+
+	return sysfs_emit(buf, "%d\n", !!test_bit(GBMD_CONSERVATION_STATE_BIT, &result));
+}
+
+static ssize_t conservation_mode_store(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool state;
+	int err;
+
+	err = kstrtobool(buf, &state);
+	if (err)
+		return err;
+
+	err = exec_sbmc(priv->adev->handle, state ? SBMC_CONSERVATION_ON : SBMC_CONSERVATION_OFF);
+	if (err)
+		return err;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(conservation_mode);
+
+static ssize_t fan_mode_show(struct device *dev,
+			     struct device_attribute *attr,
+			     char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long result;
+	int err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result);
+	if (err)
+		return err;
+
+	return sysfs_emit(buf, "%lu\n", result);
+}
+
+static ssize_t fan_mode_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned int state;
+	int err;
+
+	err = kstrtouint(buf, 0, &state);
+	if (err)
+		return err;
+
+	if (state > 4 || state == 3)
+		return -EINVAL;
+
+	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
+	if (err)
+		return err;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(fan_mode);
+
+static ssize_t fn_lock_show(struct device *dev,
+			    struct device_attribute *attr,
+			    char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long hals;
+	int err;
+
+	err = eval_hals(priv->adev->handle, &hals);
+	if (err)
+		return err;
+
+	return sysfs_emit(buf, "%d\n", !!test_bit(HALS_FNLOCK_STATE_BIT, &hals));
+}
+
+static ssize_t fn_lock_store(struct device *dev,
+			     struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool state;
+	int err;
+
+	err = kstrtobool(buf, &state);
+	if (err)
+		return err;
+
+	err = exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
+	if (err)
+		return err;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(fn_lock);
+
+static ssize_t touchpad_show(struct device *dev,
+			     struct device_attribute *attr,
+			     char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long result;
+	int err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result);
+	if (err)
+		return err;
+
+	priv->r_touchpad_val = result;
+
+	return sysfs_emit(buf, "%d\n", !!result);
+}
+
+static ssize_t touchpad_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool state;
+	int err;
+
+	err = kstrtobool(buf, &state);
+	if (err)
+		return err;
+
+	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
+	if (err)
+		return err;
+
+	priv->r_touchpad_val = state;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(touchpad);
+
+static ssize_t usb_charging_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long hals;
+	int err;
+
+	err = eval_hals(priv->adev->handle, &hals);
+	if (err)
+		return err;
+
+	return sysfs_emit(buf, "%d\n", !!test_bit(HALS_USB_CHARGING_STATE_BIT, &hals));
+}
+
+static ssize_t usb_charging_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool state;
+	int err;
+
+	err = kstrtobool(buf, &state);
+	if (err)
+		return err;
+
+	err = exec_sals(priv->adev->handle, state ? SALS_USB_CHARGING_ON : SALS_USB_CHARGING_OFF);
+	if (err)
+		return err;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(usb_charging);
+
+static struct attribute *ideapad_attributes[] = {
+	&dev_attr_camera_power.attr,
+	&dev_attr_conservation_mode.attr,
+	&dev_attr_fan_mode.attr,
+	&dev_attr_fn_lock.attr,
+	&dev_attr_touchpad.attr,
+	&dev_attr_usb_charging.attr,
+	NULL
+};
+
+static umode_t ideapad_is_visible(struct kobject *kobj,
+				  struct attribute *attr,
+				  int idx)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool supported = true;
+
+	if (attr == &dev_attr_camera_power.attr)
+		supported = test_bit(CFG_CAP_CAM_BIT, &priv->cfg);
+	else if (attr == &dev_attr_conservation_mode.attr)
+		supported = priv->features.conservation_mode;
+	else if (attr == &dev_attr_fan_mode.attr)
+		supported = priv->features.fan_mode;
+	else if (attr == &dev_attr_fn_lock.attr)
+		supported = priv->features.fn_lock;
+	else if (attr == &dev_attr_touchpad.attr)
+		supported = priv->features.touchpad_ctrl_via_ec;
+	else if (attr == &dev_attr_usb_charging.attr)
+		supported = priv->features.usb_charging;
+
+	return supported ? attr->mode : 0;
+}
+
+static const struct attribute_group ideapad_attribute_group = {
+	.is_visible = ideapad_is_visible,
+	.attrs = ideapad_attributes
+};
+
+/*
+ * DYTC Platform profile
+ */
+#define DYTC_CMD_QUERY        0 /* To get DYTC status - enable/revision */
+#define DYTC_CMD_SET          1 /* To enable/disable IC function mode */
+#define DYTC_CMD_GET          2 /* To get current IC function and mode */
+#define DYTC_CMD_RESET    0x1ff /* To reset back to default */
+
+#define DYTC_QUERY_ENABLE_BIT 8  /* Bit        8 - 0 = disabled, 1 = enabled */
+#define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
+#define DYTC_QUERY_REV_BIT    28 /* Bits 28 - 31 - revision */
+
+#define DYTC_GET_FUNCTION_BIT 8  /* Bits  8-11 - function setting */
+#define DYTC_GET_MODE_BIT     12 /* Bits 12-15 - mode setting */
+
+#define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
+#define DYTC_SET_MODE_BIT     16 /* Bits 16-19 - mode setting */
+#define DYTC_SET_VALID_BIT    20 /* Bit     20 - 1 = on, 0 = off */
+
+#define DYTC_FUNCTION_STD     0  /* Function = 0, standard mode */
+#define DYTC_FUNCTION_CQL     1  /* Function = 1, lap mode */
+#define DYTC_FUNCTION_MMC     11 /* Function = 11, desk mode */
+
+#define DYTC_MODE_PERFORM     2  /* High power mode aka performance */
+#define DYTC_MODE_LOW_POWER       3  /* Low power mode aka quiet */
+#define DYTC_MODE_BALANCE   0xF  /* Default mode aka balanced */
+
+#define DYTC_SET_COMMAND(function, mode, on) \
+	(DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
+	 (mode) << DYTC_SET_MODE_BIT | \
+	 (on) << DYTC_SET_VALID_BIT)
+
+#define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 0)
+
+#define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 1)
+
+static int convert_dytc_to_profile(int dytcmode, enum platform_profile_option *profile)
+{
+	switch (dytcmode) {
+	case DYTC_MODE_LOW_POWER:
+		*profile = PLATFORM_PROFILE_LOW_POWER;
+		break;
+	case DYTC_MODE_BALANCE:
+		*profile =  PLATFORM_PROFILE_BALANCED;
+		break;
+	case DYTC_MODE_PERFORM:
+		*profile =  PLATFORM_PROFILE_PERFORMANCE;
+		break;
+	default: /* Unknown mode */
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
+{
+	switch (profile) {
+	case PLATFORM_PROFILE_LOW_POWER:
+		*perfmode = DYTC_MODE_LOW_POWER;
+		break;
+	case PLATFORM_PROFILE_BALANCED:
+		*perfmode = DYTC_MODE_BALANCE;
+		break;
+	case PLATFORM_PROFILE_PERFORMANCE:
+		*perfmode = DYTC_MODE_PERFORM;
+		break;
+	default: /* Unknown profile */
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+/*
+ * dytc_profile_get: Function to register with platform_profile
+ * handler. Returns current platform profile.
+ */
+static int dytc_profile_get(struct platform_profile_handler *pprof,
+			    enum platform_profile_option *profile)
+{
+	struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
+
+	*profile = dytc->current_profile;
+	return 0;
+}
+
+/*
+ * Helper function - check if we are in CQL mode and if we are
+ *  - disable CQL,
+ *  - run the command
+ *  - enable CQL
+ *  If not in CQL mode, just run the command
+ */
+static int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd,
+			    unsigned long *output)
+{
+	int err, cmd_err, cur_funcmode;
+
+	/* Determine if we are in CQL mode. This alters the commands we do */
+	err = eval_dytc(priv->adev->handle, DYTC_CMD_GET, output);
+	if (err)
+		return err;
+
+	cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
+	/* Check if we're OK to return immediately */
+	if (cmd == DYTC_CMD_GET && cur_funcmode != DYTC_FUNCTION_CQL)
+		return 0;
+
+	if (cur_funcmode == DYTC_FUNCTION_CQL) {
+		err = eval_dytc(priv->adev->handle, DYTC_DISABLE_CQL, NULL);
+		if (err)
+			return err;
+	}
+
+	cmd_err = eval_dytc(priv->adev->handle, cmd, output);
+	/* Check return condition after we've restored CQL state */
+
+	if (cur_funcmode == DYTC_FUNCTION_CQL) {
+		err = eval_dytc(priv->adev->handle, DYTC_ENABLE_CQL, NULL);
+		if (err)
+			return err;
+	}
+
+	return cmd_err;
+}
+
+/*
+ * dytc_profile_set: Function to register with platform_profile
+ * handler. Sets current platform profile.
+ */
+static int dytc_profile_set(struct platform_profile_handler *pprof,
+			    enum platform_profile_option profile)
+{
+	struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
+	struct ideapad_private *priv = dytc->priv;
+	unsigned long output;
+	int err;
+
+	err = mutex_lock_interruptible(&dytc->mutex);
+	if (err)
+		return err;
+
+	if (profile == PLATFORM_PROFILE_BALANCED) {
+		/* To get back to balanced mode we just issue a reset command */
+		err = eval_dytc(priv->adev->handle, DYTC_CMD_RESET, NULL);
+		if (err)
+			goto unlock;
+	} else {
+		int perfmode;
+
+		err = convert_profile_to_dytc(profile, &perfmode);
+		if (err)
+			goto unlock;
+
+		/* Determine if we are in CQL mode. This alters the commands we do */
+		err = dytc_cql_command(priv, DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
+				       &output);
+		if (err)
+			goto unlock;
+	}
+
+	/* Success - update current profile */
+	dytc->current_profile = profile;
+
+unlock:
+	mutex_unlock(&dytc->mutex);
+
+	return err;
+}
+
+static void dytc_profile_refresh(struct ideapad_private *priv)
+{
+	enum platform_profile_option profile;
+	unsigned long output;
+	int err, perfmode;
+
+	mutex_lock(&priv->dytc->mutex);
+	err = dytc_cql_command(priv, DYTC_CMD_GET, &output);
+	mutex_unlock(&priv->dytc->mutex);
+	if (err)
+		return;
+
+	perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
+
+	if (convert_dytc_to_profile(perfmode, &profile))
+		return;
+
+	if (profile != priv->dytc->current_profile) {
+		priv->dytc->current_profile = profile;
+		platform_profile_notify();
+	}
+}
+
+static const struct dmi_system_id ideapad_dytc_v4_allow_table[] = {
+	{
+		/* Ideapad 5 Pro 16ACH6 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "82L5")
+		}
+	},
+	{
+		/* Ideapad 5 15ITL05 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad 5 15ITL05")
+		}
+	},
+	{}
+};
+
+static int ideapad_dytc_profile_init(struct ideapad_private *priv)
+{
+	int err, dytc_version;
+	unsigned long output;
+
+	if (!priv->features.dytc)
+		return -ENODEV;
+
+	err = eval_dytc(priv->adev->handle, DYTC_CMD_QUERY, &output);
+	/* For all other errors we can flag the failure */
+	if (err)
+		return err;
+
+	/* Check DYTC is enabled and supports mode setting */
+	if (!test_bit(DYTC_QUERY_ENABLE_BIT, &output)) {
+		dev_info(&priv->platform_device->dev, "DYTC_QUERY_ENABLE_BIT returned false\n");
+		return -ENODEV;
+	}
+
+	dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
+
+	if (dytc_version < 4) {
+		dev_info(&priv->platform_device->dev, "DYTC_VERSION < 4 is not supported\n");
+		return -ENODEV;
+	}
+
+	if (dytc_version < 5 &&
+	    !(allow_v4_dytc || dmi_check_system(ideapad_dytc_v4_allow_table))) {
+		dev_info(&priv->platform_device->dev,
+			 "DYTC_VERSION 4 support may not work. Pass ideapad_laptop.allow_v4_dytc=Y on the kernel commandline to enable\n");
+		return -ENODEV;
+	}
+
+	priv->dytc = kzalloc(sizeof(*priv->dytc), GFP_KERNEL);
+	if (!priv->dytc)
+		return -ENOMEM;
+
+	mutex_init(&priv->dytc->mutex);
+
+	priv->dytc->priv = priv;
+	priv->dytc->pprof.profile_get = dytc_profile_get;
+	priv->dytc->pprof.profile_set = dytc_profile_set;
+
+	/* Setup supported modes */
+	set_bit(PLATFORM_PROFILE_LOW_POWER, priv->dytc->pprof.choices);
+	set_bit(PLATFORM_PROFILE_BALANCED, priv->dytc->pprof.choices);
+	set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->dytc->pprof.choices);
+
+	/* Create platform_profile structure and register */
+	err = platform_profile_register(&priv->dytc->pprof);
+	if (err)
+		goto pp_reg_failed;
+
+	/* Ensure initial values are correct */
+	dytc_profile_refresh(priv);
+
+	return 0;
+
+pp_reg_failed:
+	mutex_destroy(&priv->dytc->mutex);
+	kfree(priv->dytc);
+	priv->dytc = NULL;
+
+	return err;
+}
+
+static void ideapad_dytc_profile_exit(struct ideapad_private *priv)
+{
+	if (!priv->dytc)
+		return;
+
+	platform_profile_remove();
+	mutex_destroy(&priv->dytc->mutex);
+	kfree(priv->dytc);
+
+	priv->dytc = NULL;
+}
+
+/*
+ * Rfkill
+ */
+struct ideapad_rfk_data {
+	char *name;
+	int cfgbit;
+	int opcode;
+	int type;
+};
+
+static const struct ideapad_rfk_data ideapad_rfk_data[] = {
+	{ "ideapad_wlan",      CFG_CAP_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
+	{ "ideapad_bluetooth", CFG_CAP_BT_BIT,   VPCCMD_W_BT,   RFKILL_TYPE_BLUETOOTH },
+	{ "ideapad_3g",        CFG_CAP_3G_BIT,   VPCCMD_W_3G,   RFKILL_TYPE_WWAN },
+};
+
+static int ideapad_rfk_set(void *data, bool blocked)
+{
+	struct ideapad_rfk_priv *priv = data;
+	int opcode = ideapad_rfk_data[priv->dev].opcode;
+
+	return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
+}
+
+static const struct rfkill_ops ideapad_rfk_ops = {
+	.set_block = ideapad_rfk_set,
+};
+
+static void ideapad_sync_rfk_state(struct ideapad_private *priv)
+{
+	unsigned long hw_blocked = 0;
+	int i;
+
+	if (priv->features.hw_rfkill_switch) {
+		if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
+			return;
+		hw_blocked = !hw_blocked;
+	}
+
+	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
+		if (priv->rfk[i])
+			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
+}
+
+static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
+{
+	unsigned long rf_enabled;
+	int err;
+
+	if (no_bt_rfkill && ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH) {
+		/* Force to enable bluetooth when no_bt_rfkill=1 */
+		write_ec_cmd(priv->adev->handle, ideapad_rfk_data[dev].opcode, 1);
+		return 0;
+	}
+
+	priv->rfk_priv[dev].dev = dev;
+	priv->rfk_priv[dev].priv = priv;
+
+	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
+				      &priv->platform_device->dev,
+				      ideapad_rfk_data[dev].type,
+				      &ideapad_rfk_ops,
+				      &priv->rfk_priv[dev]);
+	if (!priv->rfk[dev])
+		return -ENOMEM;
+
+	err = read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode - 1, &rf_enabled);
+	if (err)
+		rf_enabled = 1;
+
+	rfkill_init_sw_state(priv->rfk[dev], !rf_enabled);
+
+	err = rfkill_register(priv->rfk[dev]);
+	if (err)
+		rfkill_destroy(priv->rfk[dev]);
+
+	return err;
+}
+
+static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
+{
+	if (!priv->rfk[dev])
+		return;
+
+	rfkill_unregister(priv->rfk[dev]);
+	rfkill_destroy(priv->rfk[dev]);
+}
+
+/*
+ * Platform device
+ */
+static int ideapad_sysfs_init(struct ideapad_private *priv)
+{
+	return device_add_group(&priv->platform_device->dev,
+				&ideapad_attribute_group);
+}
+
+static void ideapad_sysfs_exit(struct ideapad_private *priv)
+{
+	device_remove_group(&priv->platform_device->dev,
+			    &ideapad_attribute_group);
+}
+
+/*
+ * input device
+ */
+#define IDEAPAD_WMI_KEY 0x100
+
+static const struct key_entry ideapad_keymap[] = {
+	{ KE_KEY,   6, { KEY_SWITCHVIDEOMODE } },
+	{ KE_KEY,   7, { KEY_CAMERA } },
+	{ KE_KEY,   8, { KEY_MICMUTE } },
+	{ KE_KEY,  11, { KEY_F16 } },
+	{ KE_KEY,  13, { KEY_WLAN } },
+	{ KE_KEY,  16, { KEY_PROG1 } },
+	{ KE_KEY,  17, { KEY_PROG2 } },
+	{ KE_KEY,  64, { KEY_PROG3 } },
+	{ KE_KEY,  65, { KEY_PROG4 } },
+	{ KE_KEY,  66, { KEY_TOUCHPAD_OFF } },
+	{ KE_KEY,  67, { KEY_TOUCHPAD_ON } },
+	{ KE_KEY, 128, { KEY_ESC } },
+
+	/*
+	 * WMI keys
+	 */
+
+	/* FnLock (handled by the firmware) */
+	{ KE_IGNORE,	0x02 | IDEAPAD_WMI_KEY },
+	/* Esc (handled by the firmware) */
+	{ KE_IGNORE,	0x03 | IDEAPAD_WMI_KEY },
+	/* Customizable Lenovo Hotkey ("star" with 'S' inside) */
+	{ KE_KEY,	0x01 | IDEAPAD_WMI_KEY, { KEY_FAVORITES } },
+	{ KE_KEY,	0x04 | IDEAPAD_WMI_KEY, { KEY_SELECTIVE_SCREENSHOT } },
+	/* Lenovo Support */
+	{ KE_KEY,	0x07 | IDEAPAD_WMI_KEY, { KEY_HELP } },
+	{ KE_KEY,	0x0e | IDEAPAD_WMI_KEY, { KEY_PICKUP_PHONE } },
+	{ KE_KEY,	0x0f | IDEAPAD_WMI_KEY, { KEY_HANGUP_PHONE } },
+	/* Dark mode toggle */
+	{ KE_KEY,	0x13 | IDEAPAD_WMI_KEY, { KEY_PROG1 } },
+	/* Sound profile switch */
+	{ KE_KEY,	0x12 | IDEAPAD_WMI_KEY, { KEY_PROG2 } },
+	/* Lenovo Virtual Background application */
+	{ KE_KEY,	0x28 | IDEAPAD_WMI_KEY, { KEY_PROG3 } },
+	/* Lenovo Support */
+	{ KE_KEY,	0x27 | IDEAPAD_WMI_KEY, { KEY_HELP } },
+	/* Refresh Rate Toggle */
+	{ KE_KEY,	0x0a | IDEAPAD_WMI_KEY, { KEY_DISPLAYTOGGLE } },
+
+	{ KE_END },
+};
+
+static int ideapad_input_init(struct ideapad_private *priv)
+{
+	struct input_dev *inputdev;
+	int err;
+
+	inputdev = input_allocate_device();
+	if (!inputdev)
+		return -ENOMEM;
+
+	inputdev->name = "Ideapad extra buttons";
+	inputdev->phys = "ideapad/input0";
+	inputdev->id.bustype = BUS_HOST;
+	inputdev->dev.parent = &priv->platform_device->dev;
+
+	err = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
+	if (err) {
+		dev_err(&priv->platform_device->dev,
+			"Could not set up input device keymap: %d\n", err);
+		goto err_free_dev;
+	}
+
+	err = input_register_device(inputdev);
+	if (err) {
+		dev_err(&priv->platform_device->dev,
+			"Could not register input device: %d\n", err);
+		goto err_free_dev;
+	}
+
+	priv->inputdev = inputdev;
+
+	return 0;
+
+err_free_dev:
+	input_free_device(inputdev);
+
+	return err;
+}
+
+static void ideapad_input_exit(struct ideapad_private *priv)
+{
+	input_unregister_device(priv->inputdev);
+	priv->inputdev = NULL;
+}
+
+static void ideapad_input_report(struct ideapad_private *priv,
+				 unsigned long scancode)
+{
+	sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
+}
+
+static void ideapad_input_novokey(struct ideapad_private *priv)
+{
+	unsigned long long_pressed;
+
+	if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
+		return;
+
+	if (long_pressed)
+		ideapad_input_report(priv, 17);
+	else
+		ideapad_input_report(priv, 16);
+}
+
+static void ideapad_check_special_buttons(struct ideapad_private *priv)
+{
+	unsigned long bit, value;
+
+	if (read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value))
+		return;
+
+	for_each_set_bit (bit, &value, 16) {
+		switch (bit) {
+		case 6:	/* Z570 */
+		case 0:	/* Z580 */
+			/* Thermal Management button */
+			ideapad_input_report(priv, 65);
+			break;
+		case 1:
+			/* OneKey Theater button */
+			ideapad_input_report(priv, 64);
+			break;
+		default:
+			dev_info(&priv->platform_device->dev,
+				 "Unknown special button: %lu\n", bit);
+			break;
+		}
+	}
+}
+
+/*
+ * backlight
+ */
+static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
+{
+	struct ideapad_private *priv = bl_get_data(blightdev);
+	unsigned long now;
+	int err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
+	if (err)
+		return err;
+
+	return now;
+}
+
+static int ideapad_backlight_update_status(struct backlight_device *blightdev)
+{
+	struct ideapad_private *priv = bl_get_data(blightdev);
+	int err;
+
+	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
+			   blightdev->props.brightness);
+	if (err)
+		return err;
+
+	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
+			   blightdev->props.power != FB_BLANK_POWERDOWN);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static const struct backlight_ops ideapad_backlight_ops = {
+	.get_brightness = ideapad_backlight_get_brightness,
+	.update_status = ideapad_backlight_update_status,
+};
+
+static int ideapad_backlight_init(struct ideapad_private *priv)
+{
+	struct backlight_device *blightdev;
+	struct backlight_properties props;
+	unsigned long max, now, power;
+	int err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max);
+	if (err)
+		return err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
+	if (err)
+		return err;
+
+	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power);
+	if (err)
+		return err;
+
+	memset(&props, 0, sizeof(props));
+
+	props.max_brightness = max;
+	props.type = BACKLIGHT_PLATFORM;
+
+	blightdev = backlight_device_register("ideapad",
+					      &priv->platform_device->dev,
+					      priv,
+					      &ideapad_backlight_ops,
+					      &props);
+	if (IS_ERR(blightdev)) {
+		err = PTR_ERR(blightdev);
+		dev_err(&priv->platform_device->dev,
+			"Could not register backlight device: %d\n", err);
+		return err;
+	}
+
+	priv->blightdev = blightdev;
+	blightdev->props.brightness = now;
+	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
+
+	backlight_update_status(blightdev);
+
+	return 0;
+}
+
+static void ideapad_backlight_exit(struct ideapad_private *priv)
+{
+	backlight_device_unregister(priv->blightdev);
+	priv->blightdev = NULL;
+}
+
+static void ideapad_backlight_notify_power(struct ideapad_private *priv)
+{
+	struct backlight_device *blightdev = priv->blightdev;
+	unsigned long power;
+
+	if (!blightdev)
+		return;
+
+	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
+		return;
+
+	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
+}
+
+static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
+{
+	unsigned long now;
+
+	/* if we control brightness via acpi video driver */
+	if (!priv->blightdev)
+		read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
+	else
+		backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
+}
+
+/*
+ * keyboard backlight
+ */
+static int ideapad_kbd_bl_brightness_get(struct ideapad_private *priv)
+{
+	unsigned long hals;
+	int err;
+
+	err = eval_hals(priv->adev->handle, &hals);
+	if (err)
+		return err;
+
+	return !!test_bit(HALS_KBD_BL_STATE_BIT, &hals);
+}
+
+static enum led_brightness ideapad_kbd_bl_led_cdev_brightness_get(struct led_classdev *led_cdev)
+{
+	struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, kbd_bl.led);
+
+	return ideapad_kbd_bl_brightness_get(priv);
+}
+
+static int ideapad_kbd_bl_brightness_set(struct ideapad_private *priv, unsigned int brightness)
+{
+	int err = exec_sals(priv->adev->handle, brightness ? SALS_KBD_BL_ON : SALS_KBD_BL_OFF);
+
+	if (err)
+		return err;
+
+	priv->kbd_bl.last_brightness = brightness;
+
+	return 0;
+}
+
+static int ideapad_kbd_bl_led_cdev_brightness_set(struct led_classdev *led_cdev,
+						  enum led_brightness brightness)
+{
+	struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, kbd_bl.led);
+
+	return ideapad_kbd_bl_brightness_set(priv, brightness);
+}
+
+static void ideapad_kbd_bl_notify(struct ideapad_private *priv)
+{
+	int brightness;
+
+	if (!priv->kbd_bl.initialized)
+		return;
+
+	brightness = ideapad_kbd_bl_brightness_get(priv);
+	if (brightness < 0)
+		return;
+
+	if (brightness == priv->kbd_bl.last_brightness)
+		return;
+
+	priv->kbd_bl.last_brightness = brightness;
+
+	led_classdev_notify_brightness_hw_changed(&priv->kbd_bl.led, brightness);
+}
+
+static int ideapad_kbd_bl_init(struct ideapad_private *priv)
+{
+	int brightness, err;
+
+	if (!priv->features.kbd_bl)
+		return -ENODEV;
+
+	if (WARN_ON(priv->kbd_bl.initialized))
+		return -EEXIST;
+
+	brightness = ideapad_kbd_bl_brightness_get(priv);
+	if (brightness < 0)
+		return brightness;
+
+	priv->kbd_bl.last_brightness = brightness;
+
+	priv->kbd_bl.led.name                    = "platform::" LED_FUNCTION_KBD_BACKLIGHT;
+	priv->kbd_bl.led.max_brightness          = 1;
+	priv->kbd_bl.led.brightness_get          = ideapad_kbd_bl_led_cdev_brightness_get;
+	priv->kbd_bl.led.brightness_set_blocking = ideapad_kbd_bl_led_cdev_brightness_set;
+	priv->kbd_bl.led.flags                   = LED_BRIGHT_HW_CHANGED;
+
+	err = led_classdev_register(&priv->platform_device->dev, &priv->kbd_bl.led);
+	if (err)
+		return err;
+
+	priv->kbd_bl.initialized = true;
+
+	return 0;
+}
+
+static void ideapad_kbd_bl_exit(struct ideapad_private *priv)
+{
+	if (!priv->kbd_bl.initialized)
+		return;
+
+	priv->kbd_bl.initialized = false;
+
+	led_classdev_unregister(&priv->kbd_bl.led);
+}
+
+/*
+ * module init/exit
+ */
+static void ideapad_sync_touchpad_state(struct ideapad_private *priv, bool send_events)
+{
+	unsigned long value;
+	unsigned char param;
+	int ret;
+
+	/* Without reading from EC touchpad LED doesn't switch state */
+	ret = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value);
+	if (ret)
+		return;
+
+	/*
+	 * Some IdeaPads don't really turn off touchpad - they only
+	 * switch the LED state. We (de)activate KBC AUX port to turn
+	 * touchpad off and on. We send KEY_TOUCHPAD_OFF and
+	 * KEY_TOUCHPAD_ON to not to get out of sync with LED
+	 */
+	if (priv->features.ctrl_ps2_aux_port)
+		i8042_command(&param, value ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE);
+
+	/*
+	 * On older models the EC controls the touchpad and toggles it on/off
+	 * itself, in this case we report KEY_TOUCHPAD_ON/_OFF. Some models do
+	 * an acpi-notify with VPC bit 5 set on resume, so this function get
+	 * called with send_events=true on every resume. Therefor if the EC did
+	 * not toggle, do nothing to avoid sending spurious KEY_TOUCHPAD_TOGGLE.
+	 */
+	if (send_events && value != priv->r_touchpad_val) {
+		ideapad_input_report(priv, value ? 67 : 66);
+		sysfs_notify(&priv->platform_device->dev.kobj, NULL, "touchpad");
+	}
+
+	priv->r_touchpad_val = value;
+}
+
+static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct ideapad_private *priv = data;
+	unsigned long vpc1, vpc2, bit;
+
+	if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
+		return;
+
+	if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
+		return;
+
+	vpc1 = (vpc2 << 8) | vpc1;
+
+	for_each_set_bit (bit, &vpc1, 16) {
+		switch (bit) {
+		case 13:
+		case 11:
+		case 8:
+		case 7:
+		case 6:
+			ideapad_input_report(priv, bit);
+			break;
+		case 10:
+			/*
+			 * This event gets send on a Yoga 300-11IBR when the EC
+			 * believes that the device has changed between laptop/
+			 * tent/stand/tablet mode. The EC relies on getting
+			 * angle info from 2 accelerometers through a special
+			 * windows service calling a DSM on the DUAL250E ACPI-
+			 * device. Linux does not do this, making the laptop/
+			 * tent/stand/tablet mode info unreliable, so we simply
+			 * ignore these events.
+			 */
+			break;
+		case 9:
+			ideapad_sync_rfk_state(priv);
+			break;
+		case 5:
+			ideapad_sync_touchpad_state(priv, true);
+			break;
+		case 4:
+			ideapad_backlight_notify_brightness(priv);
+			break;
+		case 3:
+			ideapad_input_novokey(priv);
+			break;
+		case 2:
+			ideapad_backlight_notify_power(priv);
+			break;
+		case 1:
+			/*
+			 * Some IdeaPads report event 1 every ~20
+			 * seconds while on battery power; some
+			 * report this when changing to/from tablet
+			 * mode; some report this when the keyboard
+			 * backlight has changed.
+			 */
+			ideapad_kbd_bl_notify(priv);
+			break;
+		case 0:
+			ideapad_check_special_buttons(priv);
+			break;
+		default:
+			dev_info(&priv->platform_device->dev,
+				 "Unknown event: %lu\n", bit);
+		}
+	}
+}
+
+/* On some models we need to call exec_sals(SALS_FNLOCK_ON/OFF) to set the LED */
+static const struct dmi_system_id set_fn_lock_led_list[] = {
+	{
+		/* https://bugzilla.kernel.org/show_bug.cgi?id=212671 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion R7000P2020H"),
+		}
+	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion 5 15ARH05"),
+		}
+	},
+	{}
+};
+
+/*
+ * Some ideapads have a hardware rfkill switch, but most do not have one.
+ * Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
+ * switch causing ideapad_laptop to wrongly report all radios as hw-blocked.
+ * There used to be a long list of DMI ids for models without a hw rfkill
+ * switch here, but that resulted in playing whack a mole.
+ * More importantly wrongly reporting the wifi radio as hw-blocked, results in
+ * non working wifi. Whereas not reporting it hw-blocked, when it actually is
+ * hw-blocked results in an empty SSID list, which is a much more benign
+ * failure mode.
+ * So the default now is the much safer option of assuming there is no
+ * hardware rfkill switch. This default also actually matches most hardware,
+ * since having a hw rfkill switch is quite rare on modern hardware, so this
+ * also leads to a much shorter list.
+ */
+static const struct dmi_system_id hw_rfkill_list[] = {
+	{}
+};
+
+/*
+ * On some models the EC toggles the touchpad muted LED on touchpad toggle
+ * hotkey presses, but the EC does not actually disable the touchpad itself.
+ * On these models the driver needs to explicitly enable/disable the i8042
+ * (PS/2) aux port.
+ */
+static const struct dmi_system_id ctrl_ps2_aux_port_list[] = {
+	{
+	/* Lenovo Ideapad Z570 */
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
+		},
+	},
+	{}
+};
+
+static const struct dmi_system_id no_touchpad_switch_list[] = {
+	{
+	.ident = "Lenovo Yoga 3 Pro 1370",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
+		},
+	},
+	{
+	.ident = "ZhaoYang K4e-IML",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_VERSION, "ZhaoYang K4e-IML"),
+		},
+	},
+	{}
+};
+
+static void ideapad_check_features(struct ideapad_private *priv)
+{
+	acpi_handle handle = priv->adev->handle;
+	unsigned long val;
+
+	priv->features.set_fn_lock_led =
+		set_fn_lock_led || dmi_check_system(set_fn_lock_led_list);
+	priv->features.hw_rfkill_switch =
+		hw_rfkill_switch || dmi_check_system(hw_rfkill_list);
+	priv->features.ctrl_ps2_aux_port =
+		ctrl_ps2_aux_port || dmi_check_system(ctrl_ps2_aux_port_list);
+
+	/* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */
+	if (acpi_dev_present("ELAN0634", NULL, -1))
+		priv->features.touchpad_ctrl_via_ec = 0;
+	else if (dmi_check_system(no_touchpad_switch_list))
+		priv->features.touchpad_ctrl_via_ec = 0;
+	else
+		priv->features.touchpad_ctrl_via_ec = 1;
+
+	if (!read_ec_data(handle, VPCCMD_R_FAN, &val))
+		priv->features.fan_mode = true;
+
+	if (acpi_has_method(handle, "GBMD") && acpi_has_method(handle, "SBMC"))
+		priv->features.conservation_mode = true;
+
+	if (acpi_has_method(handle, "DYTC"))
+		priv->features.dytc = true;
+
+	if (acpi_has_method(handle, "HALS") && acpi_has_method(handle, "SALS")) {
+		if (!eval_hals(handle, &val)) {
+			if (test_bit(HALS_FNLOCK_SUPPORT_BIT, &val))
+				priv->features.fn_lock = true;
+
+			if (test_bit(HALS_KBD_BL_SUPPORT_BIT, &val))
+				priv->features.kbd_bl = true;
+
+			if (test_bit(HALS_USB_CHARGING_SUPPORT_BIT, &val))
+				priv->features.usb_charging = true;
+		}
+	}
+}
+
+#if IS_ENABLED(CONFIG_ACPI_WMI)
+/*
+ * WMI driver
+ */
+enum ideapad_wmi_event_type {
+	IDEAPAD_WMI_EVENT_ESC,
+	IDEAPAD_WMI_EVENT_FN_KEYS,
+};
+
+struct ideapad_wmi_private {
+	enum ideapad_wmi_event_type event;
+};
+
+static int ideapad_wmi_probe(struct wmi_device *wdev, const void *context)
+{
+	struct ideapad_wmi_private *wpriv;
+
+	wpriv = devm_kzalloc(&wdev->dev, sizeof(*wpriv), GFP_KERNEL);
+	if (!wpriv)
+		return -ENOMEM;
+
+	*wpriv = *(const struct ideapad_wmi_private *)context;
+
+	dev_set_drvdata(&wdev->dev, wpriv);
+	return 0;
+}
+
+static void ideapad_wmi_notify(struct wmi_device *wdev, union acpi_object *data)
+{
+	struct ideapad_wmi_private *wpriv = dev_get_drvdata(&wdev->dev);
+	struct ideapad_private *priv;
+	unsigned long result;
+
+	mutex_lock(&ideapad_shared_mutex);
+
+	priv = ideapad_shared;
+	if (!priv)
+		goto unlock;
+
+	switch (wpriv->event) {
+	case IDEAPAD_WMI_EVENT_ESC:
+		ideapad_input_report(priv, 128);
+		break;
+	case IDEAPAD_WMI_EVENT_FN_KEYS:
+		if (priv->features.set_fn_lock_led &&
+		    !eval_hals(priv->adev->handle, &result)) {
+			bool state = test_bit(HALS_FNLOCK_STATE_BIT, &result);
+
+			exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
+		}
+
+		if (data->type != ACPI_TYPE_INTEGER) {
+			dev_warn(&wdev->dev,
+				 "WMI event data is not an integer\n");
+			break;
+		}
+
+		dev_dbg(&wdev->dev, "WMI fn-key event: 0x%llx\n",
+			data->integer.value);
+
+		ideapad_input_report(priv,
+				     data->integer.value | IDEAPAD_WMI_KEY);
+
+		break;
+	}
+unlock:
+	mutex_unlock(&ideapad_shared_mutex);
+}
+
+static const struct ideapad_wmi_private ideapad_wmi_context_esc = {
+	.event = IDEAPAD_WMI_EVENT_ESC
+};
+
+static const struct ideapad_wmi_private ideapad_wmi_context_fn_keys = {
+	.event = IDEAPAD_WMI_EVENT_FN_KEYS
+};
+
+static const struct wmi_device_id ideapad_wmi_ids[] = {
+	{ "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", &ideapad_wmi_context_esc }, /* Yoga 3 */
+	{ "56322276-8493-4CE8-A783-98C991274F5E", &ideapad_wmi_context_esc }, /* Yoga 700 */
+	{ "8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", &ideapad_wmi_context_fn_keys }, /* Legion 5 */
+	{},
+};
+MODULE_DEVICE_TABLE(wmi, ideapad_wmi_ids);
+
+static struct wmi_driver ideapad_wmi_driver = {
+	.driver = {
+		.name = "ideapad_wmi",
+	},
+	.id_table = ideapad_wmi_ids,
+	.probe = ideapad_wmi_probe,
+	.notify = ideapad_wmi_notify,
+};
+
+static int ideapad_wmi_driver_register(void)
+{
+	return wmi_driver_register(&ideapad_wmi_driver);
+}
+
+static void ideapad_wmi_driver_unregister(void)
+{
+	return wmi_driver_unregister(&ideapad_wmi_driver);
+}
+
+#else
+static inline int ideapad_wmi_driver_register(void) { return 0; }
+static inline void ideapad_wmi_driver_unregister(void) { }
+#endif
+
+/*
+ * ACPI driver
+ */
+static int ideapad_acpi_add(struct platform_device *pdev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
+	struct ideapad_private *priv;
+	acpi_status status;
+	unsigned long cfg;
+	int err, i;
+
+	if (!adev || eval_int(adev->handle, "_CFG", &cfg))
+		return -ENODEV;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	dev_set_drvdata(&pdev->dev, priv);
+
+	priv->cfg = cfg;
+	priv->adev = adev;
+	priv->platform_device = pdev;
+
+	ideapad_check_features(priv);
+
+	err = ideapad_sysfs_init(priv);
+	if (err)
+		return err;
+
+	ideapad_debugfs_init(priv);
+
+	err = ideapad_input_init(priv);
+	if (err)
+		goto input_failed;
+
+	err = ideapad_kbd_bl_init(priv);
+	if (err) {
+		if (err != -ENODEV)
+			dev_warn(&pdev->dev, "Could not set up keyboard backlight LED: %d\n", err);
+		else
+			dev_info(&pdev->dev, "Keyboard backlight control not available\n");
+	}
+
+	/*
+	 * On some models without a hw-switch (the yoga 2 13 at least)
+	 * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
+	 */
+	if (!priv->features.hw_rfkill_switch)
+		write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
+
+	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
+		if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
+			ideapad_register_rfkill(priv, i);
+
+	ideapad_sync_rfk_state(priv);
+	ideapad_sync_touchpad_state(priv, false);
+
+	err = ideapad_dytc_profile_init(priv);
+	if (err) {
+		if (err != -ENODEV)
+			dev_warn(&pdev->dev, "Could not set up DYTC interface: %d\n", err);
+		else
+			dev_info(&pdev->dev, "DYTC interface is not available\n");
+	}
+
+	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
+		err = ideapad_backlight_init(priv);
+		if (err && err != -ENODEV)
+			goto backlight_failed;
+	}
+
+	status = acpi_install_notify_handler(adev->handle,
+					     ACPI_DEVICE_NOTIFY,
+					     ideapad_acpi_notify, priv);
+	if (ACPI_FAILURE(status)) {
+		err = -EIO;
+		goto notification_failed;
+	}
+
+	err = ideapad_shared_init(priv);
+	if (err)
+		goto shared_init_failed;
+
+	return 0;
+
+shared_init_failed:
+	acpi_remove_notify_handler(priv->adev->handle,
+				   ACPI_DEVICE_NOTIFY,
+				   ideapad_acpi_notify);
+
+notification_failed:
+	ideapad_backlight_exit(priv);
+
+backlight_failed:
+	ideapad_dytc_profile_exit(priv);
+
+	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
+		ideapad_unregister_rfkill(priv, i);
+
+	ideapad_kbd_bl_exit(priv);
+	ideapad_input_exit(priv);
+
+input_failed:
+	ideapad_debugfs_exit(priv);
+	ideapad_sysfs_exit(priv);
+
+	return err;
+}
+
+static int ideapad_acpi_remove(struct platform_device *pdev)
+{
+	struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
+	int i;
+
+	ideapad_shared_exit(priv);
+
+	acpi_remove_notify_handler(priv->adev->handle,
+				   ACPI_DEVICE_NOTIFY,
+				   ideapad_acpi_notify);
+
+	ideapad_backlight_exit(priv);
+	ideapad_dytc_profile_exit(priv);
+
+	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
+		ideapad_unregister_rfkill(priv, i);
+
+	ideapad_kbd_bl_exit(priv);
+	ideapad_input_exit(priv);
+	ideapad_debugfs_exit(priv);
+	ideapad_sysfs_exit(priv);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ideapad_acpi_resume(struct device *dev)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+
+	ideapad_sync_rfk_state(priv);
+	ideapad_sync_touchpad_state(priv, false);
+
+	if (priv->dytc)
+		dytc_profile_refresh(priv);
+
+	return 0;
+}
+#endif
+static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
+
+static const struct acpi_device_id ideapad_device_ids[] = {
+	{"VPC2004", 0},
+	{"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
+
+static struct platform_driver ideapad_acpi_driver = {
+	.probe = ideapad_acpi_add,
+	.remove = ideapad_acpi_remove,
+	.driver = {
+		.name   = "ideapad_acpi",
+		.pm     = &ideapad_pm,
+		.acpi_match_table = ACPI_PTR(ideapad_device_ids),
+	},
+};
+
+static int __init ideapad_laptop_init(void)
+{
+	int err;
+
+	err = ideapad_wmi_driver_register();
+	if (err)
+		return err;
+
+	err = platform_driver_register(&ideapad_acpi_driver);
+	if (err) {
+		ideapad_wmi_driver_unregister();
+		return err;
+	}
+
+	return 0;
+}
+module_init(ideapad_laptop_init)
+
+static void __exit ideapad_laptop_exit(void)
+{
+	ideapad_wmi_driver_unregister();
+	platform_driver_unregister(&ideapad_acpi_driver);
+}
+module_exit(ideapad_laptop_exit)
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("IdeaPad ACPI Extras");
+MODULE_LICENSE("GPL");