Kalle Jokiniemi <kalle.jokiniemi@xxxxxxxxx> writes:
> SMS_SYSCONFIG register gets reset in off mode, added
> a save/restore mechanism for that.
>
> Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@xxxxxxxxx>
Thanks, pushing to PM branch.
Kevin
> ---
> arch/arm/mach-omap2/pm34xx.c | 1 +
> arch/arm/mach-omap2/sdrc.c | 27 +++++++++++++++++++++++++++
> arch/arm/plat-omap/include/mach/sdrc.h | 2 ++
> 3 files changed, 30 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> index 60a1c4c..6e286ef 100644
> --- a/arch/arm/mach-omap2/pm34xx.c
> +++ b/arch/arm/mach-omap2/pm34xx.c
> @@ -439,6 +439,7 @@ void omap_sram_idle(void)
> omap3_core_restore_context();
> omap3_prcm_restore_context();
> omap3_sram_restore_context();
> + omap2_sms_restore_context();
> }
> omap_uart_resume_idle(0);
> omap_uart_resume_idle(1);
> diff --git a/arch/arm/mach-omap2/sdrc.c b/arch/arm/mach-omap2/sdrc.c
> index 2045441..c832d83 100644
> --- a/arch/arm/mach-omap2/sdrc.c
> +++ b/arch/arm/mach-omap2/sdrc.c
> @@ -37,12 +37,38 @@ static struct omap_sdrc_params *sdrc_init_params;
> void __iomem *omap2_sdrc_base;
> void __iomem *omap2_sms_base;
>
> +struct omap2_sms_regs {
> + u32 sms_sysconfig;
> +};
> +
> +static struct omap2_sms_regs sms_context;
> +
> /* SDRC_POWER register bits */
> #define SDRC_POWER_EXTCLKDIS_SHIFT 3
> #define SDRC_POWER_PWDENA_SHIFT 2
> #define SDRC_POWER_PAGEPOLICY_SHIFT 0
>
> /**
> + * omap2_sms_save_context - Save SMS registers
> + *
> + * Save SMS registers that need to be restored after off mode.
> + */
> +void omap2_sms_save_context(void)
> +{
> + sms_context.sms_sysconfig = sms_read_reg(SMS_SYSCONFIG);
> +}
> +
> +/**
> + * omap2_sms_restore_context - Restore SMS registers
> + *
> + * Restore SMS registers that need to be Restored after off mode.
> + */
> +void omap2_sms_restore_context(void)
> +{
> + sms_write_reg(sms_context.sms_sysconfig, SMS_SYSCONFIG);
> +}
> +
> +/**
> * omap2_sdrc_get_params - return SDRC register values for a given clock rate
> * @r: SDRC clock rate (in Hz)
> *
> @@ -110,4 +136,5 @@ void __init omap2_sdrc_init(struct omap_sdrc_params *sp)
> (1 << SDRC_POWER_PWDENA_SHIFT) |
> (1 << SDRC_POWER_PAGEPOLICY_SHIFT);
> sdrc_write_reg(l, SDRC_POWER);
> + omap2_sms_save_context();
> }
> diff --git a/arch/arm/plat-omap/include/mach/sdrc.h b/arch/arm/plat-omap/include/mach/sdrc.h
> index a5a6cf9..a678bc8 100644
> --- a/arch/arm/plat-omap/include/mach/sdrc.h
> +++ b/arch/arm/plat-omap/include/mach/sdrc.h
> @@ -112,6 +112,8 @@ struct omap_sdrc_params {
> u32 mr;
> };
>
> +void omap2_sms_save_context(void);
> +void omap2_sms_restore_context(void);
> void __init omap2_sdrc_init(struct omap_sdrc_params *);
> struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r);
>
> --
> 1.5.4.3
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