diff options
Diffstat (limited to 'sound/soc/tegra/tegra30_ahub.c')
| -rw-r--r-- | sound/soc/tegra/tegra30_ahub.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c index 8ee96bca2aff..866474a962b3 100644 --- a/sound/soc/tegra/tegra30_ahub.c +++ b/sound/soc/tegra/tegra30_ahub.c @@ -39,6 +39,9 @@ static struct tegra30_ahub *ahub; static inline void tegra30_apbif_write(u32 reg, u32 val) { +#ifdef CONFIG_PM + ahub->apbif_reg_cache[reg >> 2] = val; +#endif __raw_writel(val, ahub->apbif_regs + reg); } @@ -49,6 +52,9 @@ static inline u32 tegra30_apbif_read(u32 reg) static inline void tegra30_audio_write(u32 reg, u32 val) { +#ifdef CONFIG_PM + ahub->ahub_reg_cache[reg >> 2] = val; +#endif __raw_writel(val, ahub->audio_regs + reg); } @@ -57,6 +63,36 @@ static inline u32 tegra30_audio_read(u32 reg) return __raw_readl(ahub->audio_regs + reg); } +#ifdef CONFIG_PM +int tegra30_ahub_apbif_resume() +{ + int i = 0; + int cache_idx_rsvd; + + tegra30_ahub_enable_clocks(); + + /*restore ahub regs*/ + for (i = 0; i < TEGRA30_AHUB_AUDIO_RX_COUNT; i++) + tegra30_audio_write(i<<2, ahub->ahub_reg_cache[i]); + + /*restore apbif regs*/ + cache_idx_rsvd = TEGRA30_APBIF_CACHE_REG_INDEX_RSVD; + for (i = 0; i < TEGRA30_APBIF_CACHE_REG_COUNT; i++) { + if (i == cache_idx_rsvd) { + cache_idx_rsvd += + TEGRA30_APBIF_CACHE_REG_INDEX_RSVD_STRIDE; + continue; + } + + tegra30_apbif_write(i<<2, ahub->apbif_reg_cache[i]); + } + + tegra30_ahub_disable_clocks(); + + return 0; +} +#endif + /* * clk_apbif isn't required for a theoretical I2S<->I2S configuration where * no PCM data is read from or sent to memory. However, that's an unlikely |