Merge tag 'platform-drivers-x86-v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Hans de Goede:
 "Highlights:

   - Microsoft Surface devices System Aggregator Module support

   - SW_TABLET_MODE reporting improvements

   - thinkpad_acpi keyboard language setting support

   - platform / DPTF profile settings support:

      - Base / userspace API parts merged from Rafael's acpi-platform
        branch

      - thinkpad_acpi and ideapad-laptop support through pdx86

   - Remove support for some obsolete Intel MID platforms through
     merging of the shared intel-mid-removal branch

   - Big cleanup of the ideapad-laptop driver

   - Misc other fixes / new hw support / quirks"

* tag 'platform-drivers-x86-v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (99 commits)
  platform/x86: intel_scu_ipc: Increase virtual timeout from 3 to 5 seconds
  platform/surface: aggregator: Fix access of unaligned value
  tools/power/x86/intel-speed-select: Update version to 1.8
  tools/power/x86/intel-speed-select: Add new command to get/set TRL
  tools/power/x86/intel-speed-select: Add new command turbo-mode
  Platform: OLPC: Constify static struct regulator_ops
  platform/surface: Add Surface Hot-Plug driver
  platform/x86: intel_scu_wdt: Drop mistakenly added const
  platform/x86: Kconfig: add missing selects for ideapad-laptop
  platform/x86: acer-wmi: Don't use ACPI_EXCEPTION()
  platform/x86: thinkpad_acpi: Replace ifdef CONFIG_ACPI_PLATFORM_PROFILE with depends on
  platform/x86: thinkpad_acpi: Fix 'warning: no previous prototype for' warnings
  platform/x86: msi-wmi: Fix variable 'status' set but not used compiler warning
  platform/surface: surface3-wmi: Fix variable 'status' set but not used compiler warning
  platform/x86: Move all dell drivers to their own subdirectory
  Documentation/ABI: sysfs-platform-ideapad-laptop: conservation_mode attribute
  Documentation/ABI: sysfs-platform-ideapad-laptop: update device attribute paths
  platform/x86: ideapad-laptop: add "always on USB charging" control support
  platform/x86: ideapad-laptop: add keyboard backlight control support
  platform/x86: ideapad-laptop: send notification about touchpad state change to sysfs
  ...

1 files changed, 423 insertions, 0 deletions

diff --git a/include/linux/surface_aggregator/device.h b/include/linux/surface_aggregator/device.h
new file mode 100644
index 000000000000..02f3e06c0a60
--- /dev/null
+++ b/include/linux/surface_aggregator/device.h
@@ -0,0 +1,423 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Surface System Aggregator Module (SSAM) bus and client-device subsystem.
+ *
+ * Main interface for the surface-aggregator bus, surface-aggregator client
+ * devices, and respective drivers building on top of the SSAM controller.
+ * Provides support for non-platform/non-ACPI SSAM clients via dedicated
+ * subsystem.
+ *
+ * Copyright (C) 2019-2020 Maximilian Luz <luzmaximilian@gmail.com>
+ */
+
+#ifndef _LINUX_SURFACE_AGGREGATOR_DEVICE_H
+#define _LINUX_SURFACE_AGGREGATOR_DEVICE_H
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/types.h>
+
+#include <linux/surface_aggregator/controller.h>
+
+
+/* -- Surface System Aggregator Module bus. --------------------------------- */
+
+/**
+ * enum ssam_device_domain - SAM device domain.
+ * @SSAM_DOMAIN_VIRTUAL:   Virtual device.
+ * @SSAM_DOMAIN_SERIALHUB: Physical device connected via Surface Serial Hub.
+ */
+enum ssam_device_domain {
+	SSAM_DOMAIN_VIRTUAL   = 0x00,
+	SSAM_DOMAIN_SERIALHUB = 0x01,
+};
+
+/**
+ * enum ssam_virtual_tc - Target categories for the virtual SAM domain.
+ * @SSAM_VIRTUAL_TC_HUB: Device hub category.
+ */
+enum ssam_virtual_tc {
+	SSAM_VIRTUAL_TC_HUB = 0x00,
+};
+
+/**
+ * struct ssam_device_uid - Unique identifier for SSAM device.
+ * @domain:   Domain of the device.
+ * @category: Target category of the device.
+ * @target:   Target ID of the device.
+ * @instance: Instance ID of the device.
+ * @function: Sub-function of the device. This field can be used to split a
+ *            single SAM device into multiple virtual subdevices to separate
+ *            different functionality of that device and allow one driver per
+ *            such functionality.
+ */
+struct ssam_device_uid {
+	u8 domain;
+	u8 category;
+	u8 target;
+	u8 instance;
+	u8 function;
+};
+
+/*
+ * Special values for device matching.
+ *
+ * These values are intended to be used with SSAM_DEVICE(), SSAM_VDEV(), and
+ * SSAM_SDEV() exclusively. Specifically, they are used to initialize the
+ * match_flags member of the device ID structure. Do not use them directly
+ * with struct ssam_device_id or struct ssam_device_uid.
+ */
+#define SSAM_ANY_TID		0xffff
+#define SSAM_ANY_IID		0xffff
+#define SSAM_ANY_FUN		0xffff
+
+/**
+ * SSAM_DEVICE() - Initialize a &struct ssam_device_id with the given
+ * parameters.
+ * @d:   Domain of the device.
+ * @cat: Target category of the device.
+ * @tid: Target ID of the device.
+ * @iid: Instance ID of the device.
+ * @fun: Sub-function of the device.
+ *
+ * Initializes a &struct ssam_device_id with the given parameters. See &struct
+ * ssam_device_uid for details regarding the parameters. The special values
+ * %SSAM_ANY_TID, %SSAM_ANY_IID, and %SSAM_ANY_FUN can be used to specify that
+ * matching should ignore target ID, instance ID, and/or sub-function,
+ * respectively. This macro initializes the ``match_flags`` field based on the
+ * given parameters.
+ *
+ * Note: The parameters @d and @cat must be valid &u8 values, the parameters
+ * @tid, @iid, and @fun must be either valid &u8 values or %SSAM_ANY_TID,
+ * %SSAM_ANY_IID, or %SSAM_ANY_FUN, respectively. Other non-&u8 values are not
+ * allowed.
+ */
+#define SSAM_DEVICE(d, cat, tid, iid, fun)					\
+	.match_flags = (((tid) != SSAM_ANY_TID) ? SSAM_MATCH_TARGET : 0)	\
+		     | (((iid) != SSAM_ANY_IID) ? SSAM_MATCH_INSTANCE : 0)	\
+		     | (((fun) != SSAM_ANY_FUN) ? SSAM_MATCH_FUNCTION : 0),	\
+	.domain   = d,								\
+	.category = cat,							\
+	.target   = ((tid) != SSAM_ANY_TID) ? (tid) : 0,			\
+	.instance = ((iid) != SSAM_ANY_IID) ? (iid) : 0,			\
+	.function = ((fun) != SSAM_ANY_FUN) ? (fun) : 0				\
+
+/**
+ * SSAM_VDEV() - Initialize a &struct ssam_device_id as virtual device with
+ * the given parameters.
+ * @cat: Target category of the device.
+ * @tid: Target ID of the device.
+ * @iid: Instance ID of the device.
+ * @fun: Sub-function of the device.
+ *
+ * Initializes a &struct ssam_device_id with the given parameters in the
+ * virtual domain. See &struct ssam_device_uid for details regarding the
+ * parameters. The special values %SSAM_ANY_TID, %SSAM_ANY_IID, and
+ * %SSAM_ANY_FUN can be used to specify that matching should ignore target ID,
+ * instance ID, and/or sub-function, respectively. This macro initializes the
+ * ``match_flags`` field based on the given parameters.
+ *
+ * Note: The parameter @cat must be a valid &u8 value, the parameters @tid,
+ * @iid, and @fun must be either valid &u8 values or %SSAM_ANY_TID,
+ * %SSAM_ANY_IID, or %SSAM_ANY_FUN, respectively. Other non-&u8 values are not
+ * allowed.
+ */
+#define SSAM_VDEV(cat, tid, iid, fun) \
+	SSAM_DEVICE(SSAM_DOMAIN_VIRTUAL, SSAM_VIRTUAL_TC_##cat, tid, iid, fun)
+
+/**
+ * SSAM_SDEV() - Initialize a &struct ssam_device_id as physical SSH device
+ * with the given parameters.
+ * @cat: Target category of the device.
+ * @tid: Target ID of the device.
+ * @iid: Instance ID of the device.
+ * @fun: Sub-function of the device.
+ *
+ * Initializes a &struct ssam_device_id with the given parameters in the SSH
+ * domain. See &struct ssam_device_uid for details regarding the parameters.
+ * The special values %SSAM_ANY_TID, %SSAM_ANY_IID, and %SSAM_ANY_FUN can be
+ * used to specify that matching should ignore target ID, instance ID, and/or
+ * sub-function, respectively. This macro initializes the ``match_flags``
+ * field based on the given parameters.
+ *
+ * Note: The parameter @cat must be a valid &u8 value, the parameters @tid,
+ * @iid, and @fun must be either valid &u8 values or %SSAM_ANY_TID,
+ * %SSAM_ANY_IID, or %SSAM_ANY_FUN, respectively. Other non-&u8 values are not
+ * allowed.
+ */
+#define SSAM_SDEV(cat, tid, iid, fun) \
+	SSAM_DEVICE(SSAM_DOMAIN_SERIALHUB, SSAM_SSH_TC_##cat, tid, iid, fun)
+
+/**
+ * struct ssam_device - SSAM client device.
+ * @dev:  Driver model representation of the device.
+ * @ctrl: SSAM controller managing this device.
+ * @uid:  UID identifying the device.
+ */
+struct ssam_device {
+	struct device dev;
+	struct ssam_controller *ctrl;
+
+	struct ssam_device_uid uid;
+};
+
+/**
+ * struct ssam_device_driver - SSAM client device driver.
+ * @driver:      Base driver model structure.
+ * @match_table: Match table specifying which devices the driver should bind to.
+ * @probe:       Called when the driver is being bound to a device.
+ * @remove:      Called when the driver is being unbound from the device.
+ */
+struct ssam_device_driver {
+	struct device_driver driver;
+
+	const struct ssam_device_id *match_table;
+
+	int  (*probe)(struct ssam_device *sdev);
+	void (*remove)(struct ssam_device *sdev);
+};
+
+extern struct bus_type ssam_bus_type;
+extern const struct device_type ssam_device_type;
+
+/**
+ * is_ssam_device() - Check if the given device is a SSAM client device.
+ * @d: The device to test the type of.
+ *
+ * Return: Returns %true if the specified device is of type &struct
+ * ssam_device, i.e. the device type points to %ssam_device_type, and %false
+ * otherwise.
+ */
+static inline bool is_ssam_device(struct device *d)
+{
+	return d->type == &ssam_device_type;
+}
+
+/**
+ * to_ssam_device() - Casts the given device to a SSAM client device.
+ * @d: The device to cast.
+ *
+ * Casts the given &struct device to a &struct ssam_device. The caller has to
+ * ensure that the given device is actually enclosed in a &struct ssam_device,
+ * e.g. by calling is_ssam_device().
+ *
+ * Return: Returns a pointer to the &struct ssam_device wrapping the given
+ * device @d.
+ */
+static inline struct ssam_device *to_ssam_device(struct device *d)
+{
+	return container_of(d, struct ssam_device, dev);
+}
+
+/**
+ * to_ssam_device_driver() - Casts the given device driver to a SSAM client
+ * device driver.
+ * @d: The driver to cast.
+ *
+ * Casts the given &struct device_driver to a &struct ssam_device_driver. The
+ * caller has to ensure that the given driver is actually enclosed in a
+ * &struct ssam_device_driver.
+ *
+ * Return: Returns the pointer to the &struct ssam_device_driver wrapping the
+ * given device driver @d.
+ */
+static inline
+struct ssam_device_driver *to_ssam_device_driver(struct device_driver *d)
+{
+	return container_of(d, struct ssam_device_driver, driver);
+}
+
+const struct ssam_device_id *ssam_device_id_match(const struct ssam_device_id *table,
+						  const struct ssam_device_uid uid);
+
+const struct ssam_device_id *ssam_device_get_match(const struct ssam_device *dev);
+
+const void *ssam_device_get_match_data(const struct ssam_device *dev);
+
+struct ssam_device *ssam_device_alloc(struct ssam_controller *ctrl,
+				      struct ssam_device_uid uid);
+
+int ssam_device_add(struct ssam_device *sdev);
+void ssam_device_remove(struct ssam_device *sdev);
+
+/**
+ * ssam_device_get() - Increment reference count of SSAM client device.
+ * @sdev: The device to increment the reference count of.
+ *
+ * Increments the reference count of the given SSAM client device by
+ * incrementing the reference count of the enclosed &struct device via
+ * get_device().
+ *
+ * See ssam_device_put() for the counter-part of this function.
+ *
+ * Return: Returns the device provided as input.
+ */
+static inline struct ssam_device *ssam_device_get(struct ssam_device *sdev)
+{
+	return sdev ? to_ssam_device(get_device(&sdev->dev)) : NULL;
+}
+
+/**
+ * ssam_device_put() - Decrement reference count of SSAM client device.
+ * @sdev: The device to decrement the reference count of.
+ *
+ * Decrements the reference count of the given SSAM client device by
+ * decrementing the reference count of the enclosed &struct device via
+ * put_device().
+ *
+ * See ssam_device_get() for the counter-part of this function.
+ */
+static inline void ssam_device_put(struct ssam_device *sdev)
+{
+	if (sdev)
+		put_device(&sdev->dev);
+}
+
+/**
+ * ssam_device_get_drvdata() - Get driver-data of SSAM client device.
+ * @sdev: The device to get the driver-data from.
+ *
+ * Return: Returns the driver-data of the given device, previously set via
+ * ssam_device_set_drvdata().
+ */
+static inline void *ssam_device_get_drvdata(struct ssam_device *sdev)
+{
+	return dev_get_drvdata(&sdev->dev);
+}
+
+/**
+ * ssam_device_set_drvdata() - Set driver-data of SSAM client device.
+ * @sdev: The device to set the driver-data of.
+ * @data: The data to set the device's driver-data pointer to.
+ */
+static inline void ssam_device_set_drvdata(struct ssam_device *sdev, void *data)
+{
+	dev_set_drvdata(&sdev->dev, data);
+}
+
+int __ssam_device_driver_register(struct ssam_device_driver *d, struct module *o);
+void ssam_device_driver_unregister(struct ssam_device_driver *d);
+
+/**
+ * ssam_device_driver_register() - Register a SSAM client device driver.
+ * @drv: The driver to register.
+ */
+#define ssam_device_driver_register(drv) \
+	__ssam_device_driver_register(drv, THIS_MODULE)
+
+/**
+ * module_ssam_device_driver() - Helper macro for SSAM device driver
+ * registration.
+ * @drv: The driver managed by this module.
+ *
+ * Helper macro to register a SSAM device driver via module_init() and
+ * module_exit(). This macro may only be used once per module and replaces the
+ * aforementioned definitions.
+ */
+#define module_ssam_device_driver(drv)			\
+	module_driver(drv, ssam_device_driver_register,	\
+		      ssam_device_driver_unregister)
+
+
+/* -- Helpers for client-device requests. ----------------------------------- */
+
+/**
+ * SSAM_DEFINE_SYNC_REQUEST_CL_N() - Define synchronous client-device SAM
+ * request function with neither argument nor return value.
+ * @name: Name of the generated function.
+ * @spec: Specification (&struct ssam_request_spec_md) defining the request.
+ *
+ * Defines a function executing the synchronous SAM request specified by
+ * @spec, with the request having neither argument nor return value. Device
+ * specifying parameters are not hard-coded, but instead are provided via the
+ * client device, specifically its UID, supplied when calling this function.
+ * The generated function takes care of setting up the request struct, buffer
+ * allocation, as well as execution of the request itself, returning once the
+ * request has been fully completed. The required transport buffer will be
+ * allocated on the stack.
+ *
+ * The generated function is defined as ``int name(struct ssam_device *sdev)``,
+ * returning the status of the request, which is zero on success and negative
+ * on failure. The ``sdev`` parameter specifies both the target device of the
+ * request and by association the controller via which the request is sent.
+ *
+ * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * the generated function.
+ */
+#define SSAM_DEFINE_SYNC_REQUEST_CL_N(name, spec...)			\
+	SSAM_DEFINE_SYNC_REQUEST_MD_N(__raw_##name, spec)		\
+	int name(struct ssam_device *sdev)				\
+	{								\
+		return __raw_##name(sdev->ctrl, sdev->uid.target,	\
+				    sdev->uid.instance);		\
+	}
+
+/**
+ * SSAM_DEFINE_SYNC_REQUEST_CL_W() - Define synchronous client-device SAM
+ * request function with argument.
+ * @name:  Name of the generated function.
+ * @atype: Type of the request's argument.
+ * @spec:  Specification (&struct ssam_request_spec_md) defining the request.
+ *
+ * Defines a function executing the synchronous SAM request specified by
+ * @spec, with the request taking an argument of type @atype and having no
+ * return value. Device specifying parameters are not hard-coded, but instead
+ * are provided via the client device, specifically its UID, supplied when
+ * calling this function. The generated function takes care of setting up the
+ * request struct, buffer allocation, as well as execution of the request
+ * itself, returning once the request has been fully completed. The required
+ * transport buffer will be allocated on the stack.
+ *
+ * The generated function is defined as ``int name(struct ssam_device *sdev,
+ * const atype *arg)``, returning the status of the request, which is zero on
+ * success and negative on failure. The ``sdev`` parameter specifies both the
+ * target device of the request and by association the controller via which
+ * the request is sent. The request's argument is specified via the ``arg``
+ * pointer.
+ *
+ * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * the generated function.
+ */
+#define SSAM_DEFINE_SYNC_REQUEST_CL_W(name, atype, spec...)		\
+	SSAM_DEFINE_SYNC_REQUEST_MD_W(__raw_##name, atype, spec)	\
+	int name(struct ssam_device *sdev, const atype *arg)		\
+	{								\
+		return __raw_##name(sdev->ctrl, sdev->uid.target,	\
+				    sdev->uid.instance, arg);		\
+	}
+
+/**
+ * SSAM_DEFINE_SYNC_REQUEST_CL_R() - Define synchronous client-device SAM
+ * request function with return value.
+ * @name:  Name of the generated function.
+ * @rtype: Type of the request's return value.
+ * @spec:  Specification (&struct ssam_request_spec_md) defining the request.
+ *
+ * Defines a function executing the synchronous SAM request specified by
+ * @spec, with the request taking no argument but having a return value of
+ * type @rtype. Device specifying parameters are not hard-coded, but instead
+ * are provided via the client device, specifically its UID, supplied when
+ * calling this function. The generated function takes care of setting up the
+ * request struct, buffer allocation, as well as execution of the request
+ * itself, returning once the request has been fully completed. The required
+ * transport buffer will be allocated on the stack.
+ *
+ * The generated function is defined as ``int name(struct ssam_device *sdev,
+ * rtype *ret)``, returning the status of the request, which is zero on
+ * success and negative on failure. The ``sdev`` parameter specifies both the
+ * target device of the request and by association the controller via which
+ * the request is sent. The request's return value is written to the memory
+ * pointed to by the ``ret`` parameter.
+ *
+ * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * the generated function.
+ */
+#define SSAM_DEFINE_SYNC_REQUEST_CL_R(name, rtype, spec...)		\
+	SSAM_DEFINE_SYNC_REQUEST_MD_R(__raw_##name, rtype, spec)	\
+	int name(struct ssam_device *sdev, rtype *ret)			\
+	{								\
+		return __raw_##name(sdev->ctrl, sdev->uid.target,	\
+				    sdev->uid.instance, ret);		\
+	}
+
+#endif /* _LINUX_SURFACE_AGGREGATOR_DEVICE_H */