ASoC: stm32: spdifrx: add power management (f68c2a68) · Commits · 戴 / test

sound/soc/stm/stm32_spdifrx.c

+39 −3

Original line number	Diff line number	Diff line
		@@ -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;
		}
		@@ -611,11 +615,16 @@ 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;

		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,

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