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ARM: bcm2835: Add GET_THROTTLED firmware property 

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>
This commit is contained in:
Stefan Wahren 2018-05-25 21:24:34 +02:00 committed by Eric Anholt
parent ce397d215c
commit be3035e362
1 changed files with 1 additions and 0 deletions
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1
include/soc/bcm2835/raspberrypi-firmware.h
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@ -75,6 +75,7 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_GET_EDID_BLOCK = 0x00030020, RPI_FIRMWARE_GET_EDID_BLOCK = 0x00030020,
RPI_FIRMWARE_GET_CUSTOMER_OTP = 0x00030021, RPI_FIRMWARE_GET_CUSTOMER_OTP = 0x00030021,
RPI_FIRMWARE_GET_DOMAIN_STATE = 0x00030030, RPI_FIRMWARE_GET_DOMAIN_STATE = 0x00030030,
RPI_FIRMWARE_GET_THROTTLED = 0x00030046,
RPI_FIRMWARE_SET_CLOCK_STATE = 0x00038001, RPI_FIRMWARE_SET_CLOCK_STATE = 0x00038001,
RPI_FIRMWARE_SET_CLOCK_RATE = 0x00038002, RPI_FIRMWARE_SET_CLOCK_RATE = 0x00038002,
RPI_FIRMWARE_SET_VOLTAGE = 0x00038003, RPI_FIRMWARE_SET_VOLTAGE = 0x00038003,