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ARM: OMAP: SMS: save/restore of SMS_SYSCONFIG for off-mode
The SMS_SYSCONFIG register gets reset in off mode, added a save/restore mechanism for that. Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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3 changed files with 30 additions and 0 deletions
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@ -399,6 +399,7 @@ static void omap_sram_idle(void)
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omap3_core_restore_context();
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omap3_core_restore_context();
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omap3_prcm_restore_context();
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omap3_prcm_restore_context();
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omap3_sram_restore_context();
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omap3_sram_restore_context();
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omap2_sms_restore_context();
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}
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}
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if (per_next_state < PWRDM_POWER_ON) {
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if (per_next_state < PWRDM_POWER_ON) {
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per_prev_state =
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per_prev_state =
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@ -37,11 +37,37 @@ static struct omap_sdrc_params *sdrc_init_params_cs0, *sdrc_init_params_cs1;
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void __iomem *omap2_sdrc_base;
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void __iomem *omap2_sdrc_base;
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void __iomem *omap2_sms_base;
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void __iomem *omap2_sms_base;
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struct omap2_sms_regs {
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u32 sms_sysconfig;
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};
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static struct omap2_sms_regs sms_context;
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/* SDRC_POWER register bits */
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/* SDRC_POWER register bits */
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#define SDRC_POWER_EXTCLKDIS_SHIFT 3
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#define SDRC_POWER_EXTCLKDIS_SHIFT 3
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#define SDRC_POWER_PWDENA_SHIFT 2
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#define SDRC_POWER_PWDENA_SHIFT 2
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#define SDRC_POWER_PAGEPOLICY_SHIFT 0
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#define SDRC_POWER_PAGEPOLICY_SHIFT 0
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/**
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* omap2_sms_save_context - Save SMS registers
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*
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* Save SMS registers that need to be restored after off mode.
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*/
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void omap2_sms_save_context(void)
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{
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sms_context.sms_sysconfig = sms_read_reg(SMS_SYSCONFIG);
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}
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/**
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* omap2_sms_restore_context - Restore SMS registers
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*
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* Restore SMS registers that need to be Restored after off mode.
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*/
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void omap2_sms_restore_context(void)
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{
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sms_write_reg(sms_context.sms_sysconfig, SMS_SYSCONFIG);
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}
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/**
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/**
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* omap2_sdrc_get_params - return SDRC register values for a given clock rate
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* omap2_sdrc_get_params - return SDRC register values for a given clock rate
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* @r: SDRC clock rate (in Hz)
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* @r: SDRC clock rate (in Hz)
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@ -132,4 +158,5 @@ void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
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l = (1 << SDRC_POWER_EXTCLKDIS_SHIFT) |
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l = (1 << SDRC_POWER_EXTCLKDIS_SHIFT) |
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(1 << SDRC_POWER_PAGEPOLICY_SHIFT);
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(1 << SDRC_POWER_PAGEPOLICY_SHIFT);
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sdrc_write_reg(l, SDRC_POWER);
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sdrc_write_reg(l, SDRC_POWER);
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omap2_sms_save_context();
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}
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}
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@ -120,6 +120,8 @@ void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
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int omap2_sdrc_get_params(unsigned long r,
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int omap2_sdrc_get_params(unsigned long r,
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struct omap_sdrc_params **sdrc_cs0,
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struct omap_sdrc_params **sdrc_cs0,
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struct omap_sdrc_params **sdrc_cs1);
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struct omap_sdrc_params **sdrc_cs1);
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void omap2_sms_save_context(void);
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void omap2_sms_restore_context(void);
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#ifdef CONFIG_ARCH_OMAP2
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#ifdef CONFIG_ARCH_OMAP2
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