diff options
| author | Olivier Moysan <olivier.moysan@st.com> | 2019-03-06 17:48:08 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-03-18 12:07:49 +0000 |
| commit | f68c2a682d444296403d1aa6e73b3de0681fdcea (patch) | |
| tree | ec909def898beca817a6c2ffdecdd00d134d9616 /sound/soc/stm | |
| parent | bbfaa7d36c1eb465f120f2a3dfe25c1fe022195d (diff) | |
| download | linux-f68c2a682d444296403d1aa6e73b3de0681fdcea.tar.bz2 | |
ASoC: stm32: spdifrx: add power management
Add suspend and resume sleep callbacks to STM32 SPDIFRX driver,
to support system low power modes.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/stm')
| -rw-r--r-- | sound/soc/stm/stm32_spdifrx.c | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/sound/soc/stm/stm32_spdifrx.c b/sound/soc/stm/stm32_spdifrx.c index 373df4f24be1..b4c3d983e195 100644 --- a/sound/soc/stm/stm32_spdifrx.c +++ b/sound/soc/stm/stm32_spdifrx.c @@ -21,6 +21,7 @@ #include <linux/delay.h> #include <linux/module.h> #include <linux/of_platform.h> +#include <linux/pinctrl/consumer.h> #include <linux/regmap.h> #include <linux/reset.h> @@ -471,6 +472,8 @@ static int stm32_spdifrx_get_ctrl_data(struct stm32_spdifrx_data *spdifrx) memset(spdifrx->cs, 0, SPDIFRX_CS_BYTES_NB); memset(spdifrx->ub, 0, SPDIFRX_UB_BYTES_NB); + pinctrl_pm_select_default_state(&spdifrx->pdev->dev); + ret = stm32_spdifrx_dma_ctrl_start(spdifrx); if (ret < 0) return ret; @@ -502,6 +505,7 @@ static int stm32_spdifrx_get_ctrl_data(struct stm32_spdifrx_data *spdifrx) end: clk_disable_unprepare(spdifrx->kclk); + pinctrl_pm_select_sleep_state(&spdifrx->pdev->dev); return ret; } @@ -611,10 +615,15 @@ static bool stm32_spdifrx_readable_reg(struct device *dev, unsigned int reg) static bool stm32_spdifrx_volatile_reg(struct device *dev, unsigned int reg) { - if (reg == STM32_SPDIFRX_DR) + switch (reg) { + case STM32_SPDIFRX_DR: + case STM32_SPDIFRX_CSR: + case STM32_SPDIFRX_SR: + case STM32_SPDIFRX_DIR: return true; - - return false; + default: + return false; + } } static bool stm32_spdifrx_writeable_reg(struct device *dev, unsigned int reg) @@ -638,6 +647,7 @@ static const struct regmap_config stm32_h7_spdifrx_regmap_conf = { .volatile_reg = stm32_spdifrx_volatile_reg, .writeable_reg = stm32_spdifrx_writeable_reg, .fast_io = true, + .cache_type = REGCACHE_FLAT, }; static irqreturn_t stm32_spdifrx_isr(int irq, void *devid) @@ -983,10 +993,36 @@ static int stm32_spdifrx_remove(struct platform_device *pdev) MODULE_DEVICE_TABLE(of, stm32_spdifrx_ids); +#ifdef CONFIG_PM_SLEEP +static int stm32_spdifrx_suspend(struct device *dev) +{ + struct stm32_spdifrx_data *spdifrx = dev_get_drvdata(dev); + + regcache_cache_only(spdifrx->regmap, true); + regcache_mark_dirty(spdifrx->regmap); + + return 0; +} + +static int stm32_spdifrx_resume(struct device *dev) +{ + struct stm32_spdifrx_data *spdifrx = dev_get_drvdata(dev); + + regcache_cache_only(spdifrx->regmap, false); + + return regcache_sync(spdifrx->regmap); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops stm32_spdifrx_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(stm32_spdifrx_suspend, stm32_spdifrx_resume) +}; + static struct platform_driver stm32_spdifrx_driver = { .driver = { .name = "st,stm32-spdifrx", .of_match_table = stm32_spdifrx_ids, + .pm = &stm32_spdifrx_pm_ops, }, .probe = stm32_spdifrx_probe, .remove = stm32_spdifrx_remove, |