ASoC: meson: axg-tdm-formatter: add reset

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/regmap.h>

#include <linux/reset.h>

#include <sound/soc.h>

#include "axg-tdm-formatter.h"

	struct clk *lrclk;

	struct clk *sclk_sel;

	struct clk *lrclk_sel;

	struct reset_control *reset;

	bool enabled;

	struct regmap *map;

};

	if (formatter->enabled)

		return 0;

	/*

	 * On the g12a (and possibly other SoCs), when a stream using

	 * multiple lanes is restarted, it will sometimes not start

	 * from the first lane, but randomly from another used one.

	 * The result is an unexpected and random channel shift.

	 *

	 * The hypothesis is that an HW counter is not properly reset

	 * and the formatter simply starts on the lane it stopped

	 * before. Unfortunately, there does not seems to be a way to

	 * reset this through the registers of the block.

	 *

	 * However, the g12a has indenpendent reset lines for each audio

	 * devices. Using this reset before each start solves the issue.

	 */

	ret = reset_control_reset(formatter->reset);

	if (ret)

		return ret;

	/*

	 * If sclk is inverted, invert it back and provide the inversion

	 * required by the formatter

		return ret;

	}

	/* Formatter dedicated reset line */

	formatter->reset = reset_control_get_optional_exclusive(dev, NULL);

	if (IS_ERR(formatter->reset)) {

		ret = PTR_ERR(formatter->reset);

		if (ret != -EPROBE_DEFER)

			dev_err(dev, "failed to get reset: %d\n", ret);

		return ret;

	}

	return devm_snd_soc_register_component(dev, drv->component_drv,

					       NULL, 0);

}