diff options
| author | Anson Huang <b20788@freescale.com> | 2014-06-23 10:42:44 +0200 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@freescale.com> | 2014-07-18 10:11:30 +0200 |
| commit | 80c0ecdce802bd642dc7127cc77cea04e0a71bf5 (patch) | |
| tree | d132b17db6e55bbf0539aa78ce137bbc44890273 /arch/arm/mach-imx/gpc.c | |
| parent | ARM: imx: mem bit must be cleared before entering DSM mode (diff) | |
| download | linux-80c0ecdce802bd642dc7127cc77cea04e0a71bf5.tar.xz linux-80c0ecdce802bd642dc7127cc77cea04e0a71bf5.zip | |
ARM: imx: add standby mode support for suspend
Add standby mode support for suspend, to enter standby mode:
echo standby > /sys/power/state;
Use UART or RTC alarm to wake up system, when system enters
standby mode, SOC will enter STOP mode with ARM core kept
power on and 24M XTAL on.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Diffstat (limited to 'arch/arm/mach-imx/gpc.c')
| -rw-r--r-- | arch/arm/mach-imx/gpc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c index 586e0171a652..82ea74e68482 100644 --- a/arch/arm/mach-imx/gpc.c +++ b/arch/arm/mach-imx/gpc.c @@ -27,13 +27,14 @@ static void __iomem *gpc_base; static u32 gpc_wake_irqs[IMR_NUM]; static u32 gpc_saved_imrs[IMR_NUM]; -void imx_gpc_pre_suspend(void) +void imx_gpc_pre_suspend(bool arm_power_off) { void __iomem *reg_imr1 = gpc_base + GPC_IMR1; int i; /* Tell GPC to power off ARM core when suspend */ - writel_relaxed(0x1, gpc_base + GPC_PGC_CPU_PDN); + if (arm_power_off) + writel_relaxed(0x1, gpc_base + GPC_PGC_CPU_PDN); for (i = 0; i < IMR_NUM; i++) { gpc_saved_imrs[i] = readl_relaxed(reg_imr1 + i * 4); |