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 <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c
index 8753754859890141885e2b504eb61bd801ecb8a4..b97c231a4f3952bbb45e0d7b68dff28fff54c78d 100644 (file)
--- 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);