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ASoC: mediatek: mt8195: add reset controller

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Audio hardware is possibly used in the firmware stage, so resetting audio
hardware before regcache records default register values is required.

Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220308072435.22460-2-trevor.wu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Trevor Wu 2022-03-08 15:24:31 +08:00 committed by Mark Brown
parent 6b6bb5e262
commit f67084148d
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GPG key ID: 24D68B725D5487D0
1 changed files with 16 additions and 0 deletions
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16
sound/soc/mediatek/mt8195/mt8195-afe-pcm.c
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@ -16,6 +16,7 @@
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include "mt8195-afe-common.h"
#include "mt8195-afe-clk.h"
#include "mt8195-reg.h"
@ -3056,6 +3057,7 @@ static int mt8195_afe_pcm_dev_probe(struct platform_device *pdev)
struct mtk_base_afe *afe;
struct mt8195_afe_private *afe_priv;
struct device *dev = &pdev->dev;
struct reset_control *rstc;
int i, irq_id, ret;
struct snd_soc_component *component;
@ -3092,6 +3094,20 @@ static int mt8195_afe_pcm_dev_probe(struct platform_device *pdev)
return ret;
}
/* reset controller to reset audio regs before regmap cache */
rstc = devm_reset_control_get_exclusive(dev, "audiosys");
if (IS_ERR(rstc)) {
ret = PTR_ERR(rstc);
dev_err(dev, "could not get audiosys reset:%d\n", ret);
return ret;
}
ret = reset_control_reset(rstc);
if (ret) {
dev_err(dev, "failed to trigger audio reset:%d\n", ret);
return ret;
}
spin_lock_init(&afe_priv->afe_ctrl_lock);
mutex_init(&afe->irq_alloc_lock);