Add i.MX7 PSCI system reset support, linux
kernel now can use "reboot" command to reset
system.
Signed-off-by: Anson Huang <anson.hu...@nxp.com>
---
changes since V1:
write WDOG register directly instead of calling reset_cpu
which is NOT safe since it is NOT in secure section.
arch/arm/mach-imx/mx7/psci-mx7.c | 5 +++++
arch/arm/mach-imx/mx7/psci.S | 7 +++++++
2 files changed, 12 insertions(+)
diff --git a/arch/arm/mach-imx/mx7/psci-mx7.c b/arch/arm/mach-imx/mx7/psci-mx7.c
index 7f429b0..66f6db6 100644
--- a/arch/arm/mach-imx/mx7/psci-mx7.c
+++ b/arch/arm/mach-imx/mx7/psci-mx7.c
@@ -74,3 +74,8 @@ __secure int imx_cpu_off(int cpu)
writel(0, SRC_BASE_ADDR + cpu * 8 + SRC_GPR1_MX7D + 4);
return 0;
}
+
+__secure void imx_system_reset(void)
+{
+ writew(1 << 2, WDOG1_BASE_ADDR);
+}
diff --git a/arch/arm/mach-imx/mx7/psci.S b/arch/arm/mach-imx/mx7/psci.S
index fc5eb34..59f98cd 100644
--- a/arch/arm/mach-imx/mx7/psci.S
+++ b/arch/arm/mach-imx/mx7/psci.S
@@ -43,4 +43,11 @@ psci_cpu_off:
1: wfi
b 1b
+.globl psci_system_reset
+psci_system_reset:
+ b imx_system_reset
+
+2: wfi
+ b 2b
+
.popsection
--
1.9.1
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