From 1a93520504aa035f037e7e255aee670561a38946 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Wed, 4 Nov 2015 11:50:13 +0100 Subject: [PATCH] MIPS: ralink: Put the pci bus into reset state before rebooting the SoC Some pcie cards have problems after a reboot without this. Signed-off-by: John Crispin Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11446/ Signed-off-by: Ralf Baechle --- arch/mips/ralink/reset.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/mips/ralink/reset.c b/arch/mips/ralink/reset.c index ee26d45e48e7..ee117c4bc4a3 100644 --- a/arch/mips/ralink/reset.c +++ b/arch/mips/ralink/reset.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include @@ -18,8 +19,10 @@ #include /* Reset Control */ -#define SYSC_REG_RESET_CTRL 0x034 -#define RSTCTL_RESET_SYSTEM BIT(0) +#define SYSC_REG_RESET_CTRL 0x034 + +#define RSTCTL_RESET_PCI BIT(26) +#define RSTCTL_RESET_SYSTEM BIT(0) static int ralink_assert_device(struct reset_controller_dev *rcdev, unsigned long id) @@ -83,6 +86,11 @@ void ralink_rst_init(void) static void ralink_restart(char *command) { + if (IS_ENABLED(CONFIG_PCI)) { + rt_sysc_m32(0, RSTCTL_RESET_PCI, SYSC_REG_RESET_CTRL); + mdelay(50); + } + local_irq_disable(); rt_sysc_w32(RSTCTL_RESET_SYSTEM, SYSC_REG_RESET_CTRL); unreachable(); -- 2.34.1