linux/sound/soc/stm/stm32_sai.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * STM32 ALSA SoC Digital Audio Interface (SAI) driver.
 *
 * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
 * Author(s): Olivier Moysan <[email protected]> for STMicroelectronics.
 */

#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/pinctrl/consumer.h>
#include <linux/reset.h>

#include <sound/dmaengine_pcm.h>
#include <sound/core.h>

#include "stm32_sai.h"

static const struct stm32_sai_conf stm32_sai_conf_f4 = …;

/*
 * Default settings for stm32 H7 socs and next.
 * These default settings will be overridden if the soc provides
 * support of hardware configuration registers.
 */
static const struct stm32_sai_conf stm32_sai_conf_h7 = …;

static const struct of_device_id stm32_sai_ids[] = …;

static int stm32_sai_pclk_disable(struct device *dev)
{ … }

static int stm32_sai_pclk_enable(struct device *dev)
{ … }

static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
{ … }

static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
{ … }

static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
			      struct device_node *np_provider,
			      int synco, int synci)
{ … }

static int stm32_sai_probe(struct platform_device *pdev)
{ … }

#ifdef CONFIG_PM_SLEEP
/*
 * When pins are shared by two sai sub instances, pins have to be defined
 * in sai parent node. In this case, pins state is not managed by alsa fw.
 * These pins are managed in suspend/resume callbacks.
 */
static int stm32_sai_suspend(struct device *dev)
{ … }

static int stm32_sai_resume(struct device *dev)
{ … }
#endif /* CONFIG_PM_SLEEP */

static const struct dev_pm_ops stm32_sai_pm_ops = …;

MODULE_DEVICE_TABLE(of, stm32_sai_ids);

static struct platform_driver stm32_sai_driver = …;

module_platform_driver(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_ALIAS(…) …;
MODULE_LICENSE(…) …;