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| author | Shawn Guo <shawn.guo@linaro.org> | 2013-03-29 02:45:31 +0100 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2013-04-01 14:42:15 +0200 |
| commit | 974a9af5320028bad0c4c17a67353edc4e5a1997 (patch) | |
| tree | cd3e73c53835ddecf4d0a5807f192b37f5672ce3 /arch/arm/mach-mxs/mach-mxs.c | |
| parent | ARM: mxs: get reset address from device tree (diff) | |
| download | linux-974a9af5320028bad0c4c17a67353edc4e5a1997.tar.xz linux-974a9af5320028bad0c4c17a67353edc4e5a1997.zip | |
ARM: mxs: remove system.c
There is no user of function mxs_reset_block() now. Let's move
mxs_restart() into mach-mxs.c as a static function and remove system.c
completely.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'arch/arm/mach-mxs/mach-mxs.c')
| -rw-r--r-- | arch/arm/mach-mxs/mach-mxs.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c index 10506381b446..c192fd62ebef 100644 --- a/arch/arm/mach-mxs/mach-mxs.c +++ b/arch/arm/mach-mxs/mach-mxs.c @@ -22,11 +22,13 @@ #include <linux/irqchip/mxs.h> #include <linux/micrel_phy.h> #include <linux/mxsfb.h> +#include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/phy.h> #include <linux/pinctrl/consumer.h> #include <asm/mach/arch.h> #include <asm/mach/time.h> +#include <asm/system_misc.h> #include <mach/common.h> #include <mach/digctl.h> #include <mach/mxs.h> @@ -459,6 +461,41 @@ static void __init mxs_machine_init(void) imx28_evk_post_init(); } +#define MX23_CLKCTRL_RESET_OFFSET 0x120 +#define MX28_CLKCTRL_RESET_OFFSET 0x1e0 +#define MXS_CLKCTRL_RESET_CHIP (1 << 1) + +/* + * Reset the system. It is called by machine_restart(). + */ +static void mxs_restart(char mode, const char *cmd) +{ + struct device_node *np; + void __iomem *reset_addr; + + np = of_find_compatible_node(NULL, NULL, "fsl,clkctrl"); + reset_addr = of_iomap(np, 0); + if (!reset_addr) + goto soft; + + if (of_device_is_compatible(np, "fsl,imx23-clkctrl")) + reset_addr += MX23_CLKCTRL_RESET_OFFSET; + else + reset_addr += MX28_CLKCTRL_RESET_OFFSET; + + /* reset the chip */ + __mxs_setl(MXS_CLKCTRL_RESET_CHIP, reset_addr); + + pr_err("Failed to assert the chip reset\n"); + + /* Delay to allow the serial port to show the message */ + mdelay(50); + +soft: + /* We'll take a jump through zero as a poor second */ + soft_restart(0); +} + static const char *imx23_dt_compat[] __initdata = { "fsl,imx23", NULL, |