From a41187b2e99bf29f4273857f9803777d51a2f6b9 Mon Sep 17 00:00:00 2001 From: Lucas Stach Date: Tue, 3 Jun 2014 22:34:51 +0200 Subject: tegra: pmc: add command to get into RCM In RCM aka recovery mode the BootROM waits for a usbloader to take over control. On most boards this is triggered by holding a physical switch which may be inconvinient at times. Add a command to switch into RCM from software. Signed-off-by: Lucas Stach Signed-off-by: Sascha Hauer --- arch/arm/mach-tegra/tegra20-pmc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/arm/mach-tegra') diff --git a/arch/arm/mach-tegra/tegra20-pmc.c b/arch/arm/mach-tegra/tegra20-pmc.c index 1069df9405..37496ac732 100644 --- a/arch/arm/mach-tegra/tegra20-pmc.c +++ b/arch/arm/mach-tegra/tegra20-pmc.c @@ -20,6 +20,7 @@ */ #include +#include #include #include @@ -47,6 +48,14 @@ static int tegra20_pmc_probe(struct device_d *dev) return 0; } +static int do_tegrarcm(int argc, char *argv[]) +{ + writel(2, pmc_base + PMC_SCRATCH(0)); + reset_cpu(0); + + return 0; +} + static __maybe_unused struct of_device_id tegra20_pmc_dt_ids[] = { { .compatible = "nvidia,tegra20-pmc", @@ -68,3 +77,14 @@ static int tegra20_pmc_init(void) return platform_driver_register(&tegra20_pmc_driver); } coredevice_initcall(tegra20_pmc_init); + +BAREBOX_CMD_HELP_START(tegrarcm) +BAREBOX_CMD_HELP_TEXT("Get into recovery mode without using a physical switch\n") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(tegrarcm) + .cmd = do_tegrarcm, + BAREBOX_CMD_DESC("Usage: tegrarcm") + BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP) + BAREBOX_CMD_HELP(cmd_tegrarcm_help) +BAREBOX_CMD_END -- cgit v1.2.3