diff options
| author | Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> | 2016-10-22 01:03:13 +0530 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2017-01-11 15:43:47 +0100 |
| commit | 3816bd77aad30bee3904358faa286b32c2b35b92 (patch) | |
| tree | f7a1ba2834ce81cfc055f4b1f7d5574c4625c3ae /arch/arm/mach-imx/pm-vf610.c | |
| parent | 7ccb5e5585c937a86b4f42ee38d310d1b8bba15c (diff) | |
ARM: vf610: PM: register power_off function
By registering a power_off command the kernel does not go to halt
state but instead tries to power off. Our power off function sets
the SoC in a low power stop mode, which essentially turns itself
off almost completely.
Code snippet is taken from 3.0 kernel:
http://git.toradex.com/cgit/linux-toradex.git/commit/?h=colibri&id=28fc68ba39c7a2210f2bb11f866f20731f0918bd
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Diffstat (limited to 'arch/arm/mach-imx/pm-vf610.c')
| -rw-r--r-- | arch/arm/mach-imx/pm-vf610.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/pm-vf610.c b/arch/arm/mach-imx/pm-vf610.c index 7cadee2ffb95..f5c54abd8ccc 100644 --- a/arch/arm/mach-imx/pm-vf610.c +++ b/arch/arm/mach-imx/pm-vf610.c @@ -466,6 +466,22 @@ put_node: } #endif +static void vf610_power_off(void) +{ + void __iomem *gpc_base = pm_info->gpc_base.vbase; + u32 gpc_pgcr; + + /* + * Power gate Power Domain 1 + */ + gpc_pgcr = readl_relaxed(gpc_base + GPC_PGCR); + gpc_pgcr |= BM_PGCR_PG_PD1; + writel_relaxed(gpc_pgcr, gpc_base + GPC_PGCR); + + /* Set low power mode */ + vf610_set_lpm(VF610_STOP); +} + static int __init vf610_suspend_mem_init(const struct vf610_pm_socdata *socdata) { struct device_node *node; @@ -675,6 +691,8 @@ void __init vf610_pm_init(void) if (ret) pr_warn("%s: No DDR LPM support with suspend %d!\n", __func__, ret); + + pm_power_off = vf610_power_off; } } |