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author | Vinod Koul <vinod.koul@intel.com> | 2014-11-04 16:25:17 +0530 |
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committer | Mark Brown <broonie@kernel.org> | 2014-11-06 12:36:18 +0000 |
commit | b0d94acd634a5cff7fe5fc46131a23997e8d0f60 (patch) | |
tree | 7bbb2709513a2c2f3e3098dcf00ce563f989e34b /sound/soc/intel/sst/sst.c | |
parent | f533a035e4da2fdd5e7b0100c84b62fd73ecd6c7 (diff) | |
download | op-kernel-dev-b0d94acd634a5cff7fe5fc46131a23997e8d0f60.zip op-kernel-dev-b0d94acd634a5cff7fe5fc46131a23997e8d0f60.tar.gz |
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/sst.c')
-rw-r--r-- | sound/soc/intel/sst/sst.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c index 8753754..b97c231 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); |