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| author | Barry Song <baohua.song@csr.com> | 2011-09-21 21:40:33 +0800 |
|---|---|---|
| committer | Barry Song <21cnbao@gmail.com> | 2011-09-21 22:52:58 +0800 |
| commit | 9c2a51faab6de454407964987ad0cdb84edf2723 (patch) | |
| tree | 482fc8ddd5191057d968a0c8164c589e8d67a99c /arch/arm/mach-prima2 | |
| parent | e5598a855b0e63b77b67c4ab708e09a23228d14f (diff) | |
| download | linux-9c2a51faab6de454407964987ad0cdb84edf2723.tar.gz linux-9c2a51faab6de454407964987ad0cdb84edf2723.tar.bz2 linux-9c2a51faab6de454407964987ad0cdb84edf2723.zip | |
ARM: CSR: PM: save/restore irq status in suspend cycle
SiRFprimaII will lose power in deepsleep mode except rtc, pmu and sdram
self-refresh. So IRQ controller will lose status in suspend cyle.
This patch saves irq mask/level registers while suspending and restore
them while resuming.
Signed-off-by: Barry Song <baohua.song@csr.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-prima2')
| -rw-r--r-- | arch/arm/mach-prima2/irq.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/mach-prima2/irq.c b/arch/arm/mach-prima2/irq.c index cf80a72c0a09..d93ceef4a50a 100644 --- a/arch/arm/mach-prima2/irq.c +++ b/arch/arm/mach-prima2/irq.c @@ -14,6 +14,7 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/irqdomain.h> +#include <linux/syscore_ops.h> #define SIRFSOC_INT_RISC_MASK0 0x0018 #define SIRFSOC_INT_RISC_MASK1 0x001C @@ -73,3 +74,42 @@ void __init sirfsoc_of_irq_init(void) sirfsoc_irq_init(); } + +struct sirfsoc_irq_status { + u32 mask0; + u32 mask1; + u32 level0; + u32 level1; +}; + +static struct sirfsoc_irq_status sirfsoc_irq_st; + +static int sirfsoc_irq_suspend(void) +{ + sirfsoc_irq_st.mask0 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK0); + sirfsoc_irq_st.mask1 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK1); + sirfsoc_irq_st.level0 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL0); + sirfsoc_irq_st.level1 = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL1); + + return 0; +} + +static void sirfsoc_irq_resume(void) +{ + writel_relaxed(sirfsoc_irq_st.mask0, sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK0); + writel_relaxed(sirfsoc_irq_st.mask1, sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK1); + writel_relaxed(sirfsoc_irq_st.level0, sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL0); + writel_relaxed(sirfsoc_irq_st.level1, sirfsoc_intc_base + SIRFSOC_INT_RISC_LEVEL1); +} + +static struct syscore_ops sirfsoc_irq_syscore_ops = { + .suspend = sirfsoc_irq_suspend, + .resume = sirfsoc_irq_resume, +}; + +static int __init sirfsoc_irq_pm_init(void) +{ + register_syscore_ops(&sirfsoc_irq_syscore_ops); + return 0; +} +device_initcall(sirfsoc_irq_pm_init); |