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authorArnd Bergmann <arnd@arndb.de>2015-10-14 17:07:32 +0200
committerArnd Bergmann <arnd@arndb.de>2015-10-14 17:07:32 +0200
commitc049adc9fd2937562b4880bdc35b8303ff56d425 (patch)
treef75d32289b1053b3e65cb0e7d330079bee2c9a9b /Documentation/hwmon
parent273395f0c2973b96a35772f8aa3b65c25517a45d (diff)
parent68acc77a2d5197141ba376fd8872eccb43bfcd7d (diff)
downloadlinux-c049adc9fd2937562b4880bdc35b8303ff56d425.tar.bz2
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
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+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. \ No newline at end of file