From b80ec7c0ef8de5d04b893310ecae29219143a454 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Fri, 7 Dec 2018 19:21:11 +0100 Subject: 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 Tested-by: Phil Elwell Reviewed-by: Eric Anholt --- drivers/firmware/raspberrypi.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/firmware') 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); -- cgit