"Stanley.Miao" <stanley.m...@windriver.com> writes:
> AM3505/3517 doesn't have IO wakeup capability, so we do not need to set
> the bit OMAP3430_EN_IO and the bit OMAP3430_EN_IO_CHAIN in the register
> PM_WKEN_WKUP when the system enters suspend state.
>
> Tested on AM3517EVM and OMAP3530EVM.
>
> Signed-off-by: Stanley.Miao <stanley.m...@windriver.com>
Acked-by: Kevin Hilman <khil...@deeprootsystems.com>
> ---
> arch/arm/mach-omap2/id.c | 2 ++
> arch/arm/mach-omap2/pm34xx.c | 7 ++++---
> arch/arm/plat-omap/include/plat/cpu.h | 2 ++
> 3 files changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
> index 37b8a1a..67bd971 100644
> --- a/arch/arm/mach-omap2/id.c
> +++ b/arch/arm/mach-omap2/id.c
> @@ -179,6 +179,8 @@ void __init omap3_check_features(void)
> OMAP3_CHECK_FEATURE(status, ISP);
> if (cpu_is_omap3630())
> omap3_features |= OMAP3_HAS_192MHZ_CLK;
> + if (!cpu_is_omap3505() && !cpu_is_omap3517())
> + omap3_features |= OMAP3_HAS_IO_WAKEUP;
>
> /*
> * TODO: Get additional info (where applicable)
> diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> index b88737f..fb4994a 100644
> --- a/arch/arm/mach-omap2/pm34xx.c
> +++ b/arch/arm/mach-omap2/pm34xx.c
> @@ -385,8 +385,9 @@ void omap_sram_idle(void)
> /* Enable IO-PAD and IO-CHAIN wakeups */
> per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
> core_next_state = pwrdm_read_next_pwrst(core_pwrdm);
> - if (per_next_state < PWRDM_POWER_ON ||
> - core_next_state < PWRDM_POWER_ON) {
> + if (omap3_has_io_wakeup() && \
> + (per_next_state < PWRDM_POWER_ON ||
> + core_next_state < PWRDM_POWER_ON)) {
> prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD, PM_WKEN);
> omap3_enable_io_chain();
> }
> @@ -479,7 +480,7 @@ void omap_sram_idle(void)
> }
>
> /* Disable IO-PAD and IO-CHAIN wakeup */
> - if (core_next_state < PWRDM_POWER_ON) {
> + if (omap3_has_io_wakeup() && core_next_state < PWRDM_POWER_ON) {
> prm_clear_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD, PM_WKEN);
> omap3_disable_io_chain();
> }
> diff --git a/arch/arm/plat-omap/include/plat/cpu.h
> b/arch/arm/plat-omap/include/plat/cpu.h
> index 7514174..aa2f4f0 100644
> --- a/arch/arm/plat-omap/include/plat/cpu.h
> +++ b/arch/arm/plat-omap/include/plat/cpu.h
> @@ -444,6 +444,7 @@ extern u32 omap3_features;
> #define OMAP3_HAS_NEON BIT(3)
> #define OMAP3_HAS_ISP BIT(4)
> #define OMAP3_HAS_192MHZ_CLK BIT(5)
> +#define OMAP3_HAS_IO_WAKEUP BIT(6)
>
> #define OMAP3_HAS_FEATURE(feat,flag) \
> static inline unsigned int omap3_has_ ##feat(void) \
> @@ -457,5 +458,6 @@ OMAP3_HAS_FEATURE(iva, IVA)
> OMAP3_HAS_FEATURE(neon, NEON)
> OMAP3_HAS_FEATURE(isp, ISP)
> OMAP3_HAS_FEATURE(192mhz_clk, 192MHZ_CLK)
> +OMAP3_HAS_FEATURE(io_wakeup, IO_WAKEUP)
>
> #endif
--
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