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| author | Arnd Bergmann <arnd@arndb.de> | 2015-10-14 17:07:32 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2015-10-14 17:07:32 +0200 |
| commit | c049adc9fd2937562b4880bdc35b8303ff56d425 (patch) | |
| tree | f75d32289b1053b3e65cb0e7d330079bee2c9a9b /Documentation/hwmon | |
| parent | 273395f0c2973b96a35772f8aa3b65c25517a45d (diff) | |
| parent | 68acc77a2d5197141ba376fd8872eccb43bfcd7d (diff) | |
Merge tag 'arm-scpi-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/drivers
Merge "ARM System Control and Power Interface(SCPI) support" from Sudeep Holla
It adds support for the following features provided by SCP firmware
using different subsystems in Linux:
1. SCPI mailbox protocol driver which using mailbox framework
2. Clocks provided by SCP using clock framework
3. CPU DVFS(cpufreq) using existing arm-big-little driver
4. SCPI based sensors including temperature sensors
* tag 'arm-scpi-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
hwmon: Support thermal zones registration for SCP temperature sensors
hwmon: Support sensors exported via ARM SCP interface
firmware: arm_scpi: Extend to support sensors
Documentation: add DT bindings for ARM SCPI sensors
cpufreq: arm_big_little: add SCPI interface driver
clk: scpi: add support for cpufreq virtual device
clk: add support for clocks provided by SCP(System Control Processor)
firmware: add support for ARM System Control and Power Interface(SCPI) protocol
Documentation: add DT binding for ARM System Control and Power Interface(SCPI) protocol
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/scpi-hwmon | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/hwmon/scpi-hwmon b/Documentation/hwmon/scpi-hwmon new file mode 100644 index 000000000000..4cfcdf2d5eab --- /dev/null +++ b/Documentation/hwmon/scpi-hwmon @@ -0,0 +1,33 @@ +Kernel driver scpi-hwmon +======================== + +Supported chips: + * Chips based on ARM System Control Processor Interface + Addresses scanned: - + Datasheet: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0922b/index.html + +Author: Punit Agrawal <punit.agrawal@arm.com> + +Description +----------- + +This driver supports hardware monitoring for SoC's based on the ARM +System Control Processor (SCP) implementing the System Control +Processor Interface (SCPI). The following sensor types are supported +by the SCP - + + * temperature + * voltage + * current + * power + +The SCP interface provides an API to query the available sensors and +their values which are then exported to userspace by this driver. + +Usage Notes +----------- + +The driver relies on device tree node to indicate the presence of SCPI +support in the kernel. See +Documentation/devicetree/bindings/arm/arm,scpi.txt for details of the +devicetree node.
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