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2020-04-14firmware: arm_scpi: Add include guard to linux/scpi_protocol.hSudeep Holla1-0/+6
If this header is include twice, it will generate loads of compile time error with the following below error pattern. It was reported by 0day kbuild robot on a branch pushed with double inclusion by accident. This is based on the similar change in linux/scmi_protocol.h error: conflicting types for ‘...’ note: previous declaration of ‘...’ was here error: redefinition of ‘...’ Add a header include guard just in case. Link: https://lore.kernel.org/r/20200403171018.1230-2-sudeep.holla@arm.com Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201Thomas Gleixner1-12/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-05firmware: arm_scpi: add support to populate OPPs and get transition latencySudeep Holla1-0/+3
Currently only CPU devices use the transition latency and the OPPs populated in the SCPI driver. scpi-cpufreq has logic to handle these. However, even GPU and other users of SCPI DVFS will need the same logic. In order to avoid duplication, this patch adds support to get DVFS transition latency and add all the OPPs to the device using OPP library helper functions. The helper functions added here can be used for any device whose DVFS are managed by SCPI. Also, we also have incorrect dependency on the cluster identifier for the CPUs. It's fundamentally wrong as the domain id need not match the cluster id. This patch gets rid of that dependency by making use of the clock bindings which are already in place. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2016-06-21firmware: arm_scpi: add support for device power state managementSudeep Holla1-0/+2
SCPI protocol supports device power state management. This deals with power states of various peripheral devices in the system other than the core compute subsystem. This patch adds support for the power state management of those peripheral devices. Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Tested-by: Jon Medhurst <tixy@linaro.org> Reviewed-by: Jon Medhurst <tixy@linaro.org> Reviewed-by: Kevin Hilman <khilman@baylibre.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2016-02-16hwmon: (scpi) add energy meter supportSudeep Holla1-0/+1
SCPI specification v1.1 adds support for energy sensors. This patch adds support for the same. Acked-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2016-02-16firmware: arm_scpi: add support for 64-bit sensor valuesSudeep Holla1-1/+1
SCPI specification version 1.1 extended the sensor from 32-bit to 64-bit values in order to accommodate new sensor class with 64-bit requirements Since the SCPI driver sets the higher 32-bit for older protocol version to zeros, there's no need to explicitly check the SCPI protocol version and the backward compatibility is maintainted. Acked-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2015-11-19scpi: hide get_scpi_ops in module from built-in codeArnd Bergmann1-1/+1
The scpi_clock driver can be built-in when CONFIG_COMPILE_TEST is set even when ARM_SCPI_PROTOCOL is a loadable module, and that results in a link error: drivers/built-in.o: In function `scpi_clocks_probe': (.text+0x14453c): undefined reference to `get_scpi_ops' Using #if IS_REACHABLE() around the get_scpi_ops() declaration makes it build successfully in this case for compile-testing, but the effect is the same as when ARM_SCPI_PROTOCOL is disabled, as the code will not be used. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Punit Agrawal <punit.agrawal@arm.com>
2015-10-09firmware: arm_scpi: Extend to support sensorsPunit Agrawal1-0/+17
ARM System Control Processor (SCP) provides an API to query and use the sensors available in the system. Extend the SCPI driver to support sensor messages. Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com>
2015-09-28firmware: add support for ARM System Control and Power Interface(SCPI) protocolSudeep Holla1-0/+61
This patch adds support for System Control and Power Interface (SCPI) Message Protocol used between the Application Cores(AP) and the System Control Processor(SCP). The MHU peripheral provides a mechanism for inter-processor communication between SCP's M3 processor and AP. SCP offers control and management of the core/cluster power states, various power domain DVFS including the core/cluster, certain system clocks configuration, thermal sensors and many others. This protocol driver provides interface for all the client drivers using SCPI to make use of the features offered by the SCP. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Jon Medhurst (Tixy) <tixy@linaro.org> Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Liviu Dudau <Liviu.Dudau@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>