From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Fri, 25 May 2018 21:24:34 +0200
Subject: ARM: bcm2835: Add GET_THROTTLED firmware property
Git-commit: be3035e3627d2570de4c2c612ecd095968986437
Patch-mainline: v4.19-rc1
References: bsc#1108468
Recent Raspberry Pi firmware provides a mailbox property to detect
under-voltage conditions. Here is the current definition.
The u32 value returned by the firmware is divided into 2 parts:
- lower 16-bits are the live value
- upper 16-bits are the history or sticky value
Bits:
0: undervoltage
1: arm frequency capped
2: currently throttled
16: undervoltage has occurred
17: arm frequency capped has occurred
18: throttling has occurred
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
include/soc/bcm2835/raspberrypi-firmware.h | 1 +
1 file changed, 1 insertion(+)
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -75,6 +75,7 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_GET_EDID_BLOCK = 0x00030020,
RPI_FIRMWARE_GET_CUSTOMER_OTP = 0x00030021,
RPI_FIRMWARE_GET_DOMAIN_STATE = 0x00030030,
+ RPI_FIRMWARE_GET_THROTTLED = 0x00030046,
RPI_FIRMWARE_SET_CLOCK_STATE = 0x00038001,
RPI_FIRMWARE_SET_CLOCK_RATE = 0x00038002,
RPI_FIRMWARE_SET_VOLTAGE = 0x00038003,