linux/Documentation/ABI/obsolete/sysfs-driver-intel_pmc_bxt

These files allow sending arbitrary IPC commands to the PMC/SCU which
may be dangerous. These will be removed eventually and should not be
used in any new applications.

What:		/sys/bus/platform/devices/INT34D2:00/simplecmd
Date:		Jun 2015
KernelVersion:	4.1
Contact:	Mika Westerberg <mika.westerberg@linux.intel.com>
Description:	This interface allows userspace to send an arbitrary
		IPC command to the PMC/SCU.

		Format: %d %d where first number is command and
		second number is subcommand.

What:		/sys/bus/platform/devices/INT34D2:00/northpeak
Date:		Jun 2015
KernelVersion:	4.1
Contact:	Mika Westerberg <mika.westerberg@linux.intel.com>
Description:	This interface allows userspace to enable and disable
		Northpeak through the PMC/SCU.

		Format: %u.
platform/x86: intel_pmc_ipc: Convert to MFD This driver only creates a bunch of platform devices sharing resources belonging to the PMC device. This is pretty much what MFD subsystem is for so move the driver there, renaming it to intel_pmc_bxt.c which should be more clear what it is. MFD subsystem provides nice helper APIs for subdevice creation so convert the driver to use those. Unfortunately the ACPI device includes separate resources for most of the subdevices so we cannot simply call mfd_add_devices() to create all of them but instead we need to call it separately for each device. The new MFD driver continues to expose two sysfs attributes that allow userspace to send IPC commands to the PMC/SCU to avoid breaking any existing applications that may use these. Generally this is bad idea so document this in the ABI documentation. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> 2020-04-16 16:15:51 +08:00			`These files allow sending arbitrary IPC commands to the PMC/SCU which`
			`may be dangerous. These will be removed eventually and should not be`
			`used in any new applications.`

			`What: /sys/bus/platform/devices/INT34D2:00/simplecmd`
			`Date: Jun 2015`
			`KernelVersion: 4.1`
			`Contact: Mika Westerberg <mika.westerberg@linux.intel.com>`
			`Description: This interface allows userspace to send an arbitrary`
			`IPC command to the PMC/SCU.`

			`Format: %d %d where first number is command and`
			`second number is subcommand.`

			`What: /sys/bus/platform/devices/INT34D2:00/northpeak`
			`Date: Jun 2015`
			`KernelVersion: 4.1`
			`Contact: Mika Westerberg <mika.westerberg@linux.intel.com>`
			`Description: This interface allows userspace to enable and disable`
			`Northpeak through the PMC/SCU.`

			`Format: %u.`