diff options
| author | John Crispin <blogic@openwrt.org> | 2015-11-04 13:50:13 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-11-11 10:38:14 +0300 |
| commit | 1a93520504aa035f037e7e255aee670561a38946 (patch) | |
| tree | 5718e8589c05dac64ce7a6cf1f391ff6d84d06bc /arch/mips | |
| parent | 81ab9f6c5ff8565e4cba330e340a8979a10521d7 (diff) | |
| download | linux-1a93520504aa035f037e7e255aee670561a38946.tar.xz | |
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 <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11446/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/ralink/reset.c | 12 |
1 files 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 <linux/pm.h> #include <linux/io.h> #include <linux/of.h> +#include <linux/delay.h> #include <linux/reset-controller.h> #include <asm/reboot.h> @@ -18,8 +19,10 @@ #include <asm/mach-ralink/ralink_regs.h> /* 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(); |