Commit Graph

10 Commits

Author SHA1 Message Date
Stefan Wahren c6275e4b12 soc: bcm2835: sync firmware properties with downstream
Add latest firmware property tags from the latest Raspberry Pi downstream
kernel. This is needed to use the reboot notify in the following
commit.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
2019-01-09 16:34:46 +01:00
Stefan Wahren 502b431cda firmware: raspberrypi: Switch to SPDX identifier
Adopt the SPDX license identifier headers to ease license compliance
management.

Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
2018-11-21 14:33:11 +01:00
Stefan Wahren be3035e362 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>
2018-06-21 17:17:11 -07:00
Geert Uytterhoeven 144345a4a8 soc: bcm2835: Make !RASPBERRYPI_FIRMWARE dummies return failure
If CONFIG_RASPBERRYPI_FIRMWARE=n:

    drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_polarity’:
    drivers/gpio/gpio-raspberrypi-exp.c:71: warning: ‘get.polarity’ is used uninitialized in this function
    drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_direction’:
    drivers/gpio/gpio-raspberrypi-exp.c:150: warning: ‘get.direction’ is used uninitialized in this function

The dummy firmware interface functions return 0, which means success,
causing subsequent code to make use of the never initialized output
parameter.

Fix this by making the dummy functions return an error code (-ENOSYS)
instead.

Note that this assumes the firmware always fills in the requested data
in the CONFIG_RASPBERRYPI_FIRMWARE=y case.

Fixes: d45f1a563b ("staging: vc04_services: fix up rpi firmware functions")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2018-04-16 15:15:23 -07:00
Baruch Siach 08af112e79 soc: bcm2835: sync firmware properties with downstream
Add latest firmware property tags from the latest Raspberry Pi downstream
kernel. This is needed for the GPIO tags, so we can control the GPIO
multiplexor lines.

Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-02-22 13:46:35 +01:00
Greg Kroah-Hartman d45f1a563b staging: vc04_services: fix up rpi firmware functions
The raspberrypi-firmware.h file should provide empty functions if we
aren't building in that option.  This makes it easier to test-build
code, and not have odd warnings about unused variables if you just try
to #define away the functions.

Cc: Daniel Stone <daniels@collabora.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Pranith Kumar <bobby.prani@gmail.com>
Cc: popcornmix <popcornmix@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-16 10:26:12 +02:00
Eric Anholt e0cb350957 ARM: bcm2835: Add #define for VCHIQ property message.
This comes from the downstream tree and is needed for the new VCHIQ
driver in staging.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-16 10:24:17 +02:00
Eric Anholt 60d56333e8 ARM: bcm2835: Define two new packets from the latest firmware.
These packets give us direct access to the firmware's power management
code, as opposed to GET/SET_POWER_STATE packets that only had a couple
of domains implemented.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
2015-12-21 19:58:03 -08:00
Alexander Aring 16134b3bc3 ARM: bcm2835: add mutual inclusion protection
This patch adds mutual inclusion protection for the rpi firmware header.

Cc: Eric Anholt <eric@anholt.net>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-10-24 13:15:58 -07:00
Eric Anholt 4e3d60656a ARM: bcm2835: Add the Raspberry Pi firmware driver
This gives us a function for making mailbox property channel requests
of the firmware, which is most notable in that it will let us get and
set clock rates.

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
2015-10-14 15:30:06 -07:00