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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2013-12-18 15:59:37 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-01-07 15:01:58 +0100 |
| commit | ead9e2936b071a501f7c7ff709802ea4257cd23a (patch) | |
| tree | 284e6907de58149f753b6b7d8fd3ab4f180c97e9 | |
| parent | 8ffc05f1538844a25fe9c57ce7badbfff4232a1f (diff) | |
| download | linux-ead9e2936b071a501f7c7ff709802ea4257cd23a.tar.bz2 | |
ARM: ux500: Enable system suspend with WFI support
When building for CONFIG_SUSPEND, add the platform suspend callbacks
to enable system suspend for ux500.
At this initial step, only WFI state is supported, which is reached
for both PM_SUSPEND_MEM and PM_SUSPEND_STANDBY.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | arch/arm/mach-ux500/pm.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/pm.c b/arch/arm/mach-ux500/pm.c index 1a468f0fd22e..b80a9a2e356e 100644 --- a/arch/arm/mach-ux500/pm.c +++ b/arch/arm/mach-ux500/pm.c @@ -3,6 +3,8 @@ * Author: Rickard Andersson <rickard.andersson@stericsson.com> for * ST-Ericsson. * Author: Daniel Lezcano <daniel.lezcano@linaro.org> for Linaro. + * Author: Ulf Hansson <ulf.hansson@linaro.org> for Linaro. + * * License terms: GNU General Public License (GPL) version 2 * */ @@ -11,6 +13,7 @@ #include <linux/irqchip/arm-gic.h> #include <linux/delay.h> #include <linux/io.h> +#include <linux/suspend.h> #include <linux/platform_data/arm-ux500-pm.h> #include "db8500-regs.h" @@ -152,6 +155,27 @@ int prcmu_copy_gic_settings(void) return 0; } +#ifdef CONFIG_SUSPEND +static int ux500_suspend_enter(suspend_state_t state) +{ + cpu_do_idle(); + return 0; +} + +static int ux500_suspend_valid(suspend_state_t state) +{ + return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY; +} + +static const struct platform_suspend_ops ux500_suspend_ops = { + .enter = ux500_suspend_enter, + .valid = ux500_suspend_valid, +}; +#define UX500_SUSPEND_OPS (&ux500_suspend_ops) +#else +#define UX500_SUSPEND_OPS NULL +#endif + void __init ux500_pm_init(u32 phy_base, u32 size) { prcmu_base = ioremap(phy_base, size); @@ -164,4 +188,7 @@ void __init ux500_pm_init(u32 phy_base, u32 size) * This will make sure that the GIC is correctly configured. */ prcmu_gic_recouple(); + + /* Set up ux500 suspend callbacks. */ + suspend_set_ops(UX500_SUSPEND_OPS); } |