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ARM: 7198/1: arm/imx6: add restart support for imx6q

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The restart support was missed from the initial imx6q submission.
The mxc_restart() does not work for imx6q.  Instead, this patch adds
the restart for imx6q.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Shawn Guo
2011-12-09 00:51:26 +01:00
committed by Russell King
parent f88b8979d2
commit 0575fb754d
4 changed files with 58 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm/mach-imx/src.c
+23
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@@ -19,6 +19,7 @@
#define SRC_SCR 0x000
#define SRC_GPR1 0x020
#define BP_SRC_SCR_WARM_RESET_ENABLE 0
#define BP_SRC_SCR_CORE1_RST 14
#define BP_SRC_SCR_CORE1_ENABLE 22
@@ -46,11 +47,33 @@ void imx_set_cpu_jump(int cpu, void *jump_addr)
src_base + SRC_GPR1 + cpu * 8);
}
void imx_src_prepare_restart(void)
{
u32 val;
/* clear enable bits of secondary cores */
val = readl_relaxed(src_base + SRC_SCR);
val &= ~(0x7 << BP_SRC_SCR_CORE1_ENABLE);
writel_relaxed(val, src_base + SRC_SCR);
/* clear persistent entry register of primary core */
writel_relaxed(0, src_base + SRC_GPR1);
}
void __init imx_src_init(void)
{
struct device_node *np;
u32 val;
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-src");
src_base = of_iomap(np, 0);
WARN_ON(!src_base);
/*
* force warm reset sources to generate cold reset
* for a more reliable restart
*/
val = readl_relaxed(src_base + SRC_SCR);
val &= ~(1 << BP_SRC_SCR_WARM_RESET_ENABLE);
writel_relaxed(val, src_base + SRC_SCR);
}