From 5ec83561c42cddd0f78a1e183b937f44902a18e4 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 5 Aug 2020 15:34:05 +0200 Subject: ARM: imx: Add support for switching primary/secondary boot mode to bmode The i.MX6/i.MX7 is capable of booting a secondary "redundant" system image in case the primary one is corrupted. The user can force this boot mode as well by explicitly setting SRC GPR10 bit 30. This can be potentially useful when upgrading the bootloader itself. Expose this functionality to the user. Signed-off-by: Marek Vasut Cc: Fabio Estevam Cc: NXP i.MX U-Boot Team Cc: Peng Fan Cc: Stefano Babic Reviewed-by: Stefano Babic --- arch/arm/mach-imx/init.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) (limited to 'arch/arm/mach-imx/init.c') diff --git a/arch/arm/mach-imx/init.c b/arch/arm/mach-imx/init.c index e30d63b8963..ce3eb4b0b8a 100644 --- a/arch/arm/mach-imx/init.c +++ b/arch/arm/mach-imx/init.c @@ -104,20 +104,28 @@ void init_src(void) void boot_mode_apply(unsigned cfg_val) { #ifdef CONFIG_MX6 + const u32 persist_sec = IMX6_SRC_GPR10_PERSIST_SECONDARY_BOOT; const u32 bmode = IMX6_SRC_GPR10_BMODE; #elif CONFIG_MX7 + const u32 persist_sec = IMX7_SRC_GPR10_PERSIST_SECONDARY_BOOT; const u32 bmode = IMX7_SRC_GPR10_BMODE; #endif struct src *psrc = (struct src *)SRC_BASE_ADDR; unsigned reg; - writel(cfg_val, &psrc->gpr9); - reg = readl(&psrc->gpr10); - if (cfg_val) - reg |= bmode; - else - reg &= ~bmode; - writel(reg, &psrc->gpr10); + if (cfg_val == MAKE_CFGVAL_PRIMARY_BOOT) + clrbits_le32(&psrc->gpr10, persist_sec); + else if (cfg_val == MAKE_CFGVAL_SECONDARY_BOOT) + setbits_le32(&psrc->gpr10, persist_sec); + else { + writel(cfg_val, &psrc->gpr9); + reg = readl(&psrc->gpr10); + if (cfg_val) + reg |= bmode; + else + reg &= ~bmode; + writel(reg, &psrc->gpr10); + } } #endif -- cgit v1.2.3