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authorVinod Koul <vinod.koul@intel.com>2014-11-04 16:25:17 +0530
committerMark Brown <broonie@kernel.org>2014-11-06 12:36:18 +0000
commitb0d94acd634a5cff7fe5fc46131a23997e8d0f60 (patch)
tree7bbb2709513a2c2f3e3098dcf00ce563f989e34b /sound/soc/intel/sst
parentf533a035e4da2fdd5e7b0100c84b62fd73ecd6c7 (diff)
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>
Diffstat (limited to 'sound/soc/intel/sst')
-rw-r--r--sound/soc/intel/sst/sst.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c
index 87537548598..b97c231a4f3 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);