From b0d94acd634a5cff7fe5fc46131a23997e8d0f60 Mon Sep 17 00:00:00 2001 From: Vinod Koul Date: Tue, 4 Nov 2014 16:25:17 +0530 Subject: [PATCH] ASoC: Intel: mrfld - add shim save restore In ACPI platform we need to save few registers of Shim on suspend and restore them on resume, so add handlers to do this Signed-off-by: Subhransu S. Prusty Signed-off-by: Vinod Koul Signed-off-by: Mark Brown --- sound/soc/intel/sst/sst.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c index 875375485989..b97c231a4f39 100644 --- a/sound/soc/intel/sst/sst.c +++ b/sound/soc/intel/sst/sst.c @@ -339,6 +339,34 @@ void sst_context_cleanup(struct intel_sst_drv *ctx) } EXPORT_SYMBOL_GPL(sst_context_cleanup); +static inline void sst_save_shim64(struct intel_sst_drv *ctx, + void __iomem *shim, + struct sst_shim_regs64 *shim_regs) +{ + unsigned long irq_flags; + + spin_lock_irqsave(&ctx->ipc_spin_lock, irq_flags); + + shim_regs->imrx = sst_shim_read64(shim, SST_IMRX), + + spin_unlock_irqrestore(&ctx->ipc_spin_lock, irq_flags); +} + +static inline void sst_restore_shim64(struct intel_sst_drv *ctx, + void __iomem *shim, + struct sst_shim_regs64 *shim_regs) +{ + unsigned long irq_flags; + + /* + * we only need to restore IMRX for this case, rest will be + * initialize by FW or driver when firmware is loaded + */ + spin_lock_irqsave(&ctx->ipc_spin_lock, irq_flags); + sst_shim_write64(shim, SST_IMRX, shim_regs->imrx), + spin_unlock_irqrestore(&ctx->ipc_spin_lock, irq_flags); +} + void sst_configure_runtime_pm(struct intel_sst_drv *ctx) { pm_runtime_set_autosuspend_delay(ctx->dev, SST_SUSPEND_DELAY); -- 2.20.1