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| author | Stefan Wahren <stefan.wahren@i2se.com> | 2018-12-07 21:21:11 +0300 |
|---|---|---|
| committer | Stefan Wahren <stefan.wahren@i2se.com> | 2019-01-09 18:38:34 +0300 |
| commit | b80ec7c0ef8de5d04b893310ecae29219143a454 (patch) | |
| tree | 5f38da1e54fe83e3ee497907aff1ca6d740d5ceb /drivers/firmware/raspberrypi.c | |
| parent | c6275e4b12bfb53097bca852dd49c15b1af50cb4 (diff) | |
| download | linux-b80ec7c0ef8de5d04b893310ecae29219143a454.tar.xz | |
firmware: raspberrypi: notify VC4 firmware of a reboot
The firmware-owned GPIO expander on RPi 3 B+ must be in same state
after a reboot as initial power on. Otherwise this would cause a
network boot failure of the BOOTROM. So inform the VC4 firmware to restore
the expander before doing a reboot.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Phil Elwell <phil@raspberrypi.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/firmware/raspberrypi.c')
| -rw-r--r-- | drivers/firmware/raspberrypi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c index a13558154ac3..61be15d9df7d 100644 --- a/drivers/firmware/raspberrypi.c +++ b/drivers/firmware/raspberrypi.c @@ -238,6 +238,16 @@ static int rpi_firmware_probe(struct platform_device *pdev) return 0; } +static void rpi_firmware_shutdown(struct platform_device *pdev) +{ + struct rpi_firmware *fw = platform_get_drvdata(pdev); + + if (!fw) + return; + + rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_REBOOT, NULL, 0); +} + static int rpi_firmware_remove(struct platform_device *pdev) { struct rpi_firmware *fw = platform_get_drvdata(pdev); @@ -278,6 +288,7 @@ static struct platform_driver rpi_firmware_driver = { .of_match_table = rpi_firmware_of_match, }, .probe = rpi_firmware_probe, + .shutdown = rpi_firmware_shutdown, .remove = rpi_firmware_remove, }; module_platform_driver(rpi_firmware_driver); |