SMS_SYSCONFIG register gets reset in off mode, added a save/restore mechanism for that.
Signed-off-by: Kalle Jokiniemi <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
