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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-23 13:52:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-23 13:52:46 -0700
commitf3ea496213819c80ce9c49a9b65f9261da713d11 (patch)
tree1c8fad9c5c609504c2916ad3844494093f89f8f1 /Documentation/hwmon
parent9e259f9352d52053058a234f7c062c4e4f56dc85 (diff)
parent29ed45fff05899f6f39d05fe1c32b1bc51f8926b (diff)
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson: "Some of the larger changes this merge window: - Removal of drivers for Exynos5440, a Samsung SoC that never saw widespread use. - Uniphier support for USB3 and SPI reset handling - Syste control and SRAM drivers and bindings for Allwinner platforms - Qualcomm AOSS (Always-on subsystem) reset controller drivers - Raspberry Pi hwmon driver for voltage - Mediatek pwrap (pmic) support for MT6797 SoC" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (52 commits) drivers/firmware: psci_checker: stash and use topology_core_cpumask for hotplug tests soc: fsl: cleanup Kconfig menu soc: fsl: dpio: Convert DPIO documentation to .rst staging: fsl-mc: Remove remaining files staging: fsl-mc: Move DPIO from staging to drivers/soc/fsl staging: fsl-dpaa2: eth: move generic FD defines to DPIO soc: fsl: qe: gpio: Add qe_gpio_set_multiple usb: host: exynos: Remove support for Exynos5440 clk: samsung: Remove support for Exynos5440 soc: sunxi: Add the A13, A23 and H3 system control compatibles reset: uniphier: add reset control support for SPI cpufreq: exynos: Remove support for Exynos5440 ata: ahci-platform: Remove support for Exynos5440 soc: imx6qp: Use GENPD_FLAG_ALWAYS_ON for PU errata soc: mediatek: pwrap: add mt6351 driver for mt6797 SoCs soc: mediatek: pwrap: add pwrap driver for mt6797 SoCs soc: mediatek: pwrap: fix cipher init setting error dt-bindings: pwrap: mediatek: add pwrap support for MT6797 reset: uniphier: add USB3 core reset control dt-bindings: reset: uniphier: add USB3 core reset support ...
Diffstat (limited to 'Documentation/hwmon')
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diff --git a/Documentation/hwmon/raspberrypi-hwmon b/Documentation/hwmon/raspberrypi-hwmon
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+Kernel driver raspberrypi-hwmon
+===============================
+
+Supported boards:
+ * Raspberry Pi A+ (via GPIO on SoC)
+ * Raspberry Pi B+ (via GPIO on SoC)
+ * Raspberry Pi 2 B (via GPIO on SoC)
+ * Raspberry Pi 3 B (via GPIO on port expander)
+ * Raspberry Pi 3 B+ (via PMIC)
+
+Author: Stefan Wahren <stefan.wahren@i2se.com>
+
+Description
+-----------
+
+This driver periodically polls a mailbox property of the VC4 firmware to detect
+undervoltage conditions.
+
+Sysfs entries
+-------------
+
+in0_lcrit_alarm Undervoltage alarm