linux-kernel - [PATCH] ASoC: da7219: software reset codec at probe

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Date:   Wed, 14 Sep 2016 22:06:00 +0800
From:   Xing Zheng <zhengxing@...k-chips.com>
To:     linux-rockchip@...ts.infradead.org,
        Adam.Thomson.Opensource@...semi.com
Cc:     cychiang@...gle.com, heiko@...ech.de, smbarber@...gle.com,
        hychao@...gle.com, dianders@...gle.com,
        Hsin-Yu Chao <hychao@...omium.org>,
        Xing Zheng <zhengxing@...k-chips.com>,
        Support Opensource <support.opensource@...semi.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: da7219: software reset codec at probe

From: Hsin-Yu Chao <hychao@...omium.org>

On some platform da7219 codec has persistent power across reboot
so it doesn't reset and cause abnormal jack detection.
Workaround this issue by doing software reset at probe.

Signed-off-by: Hsin-Yu Chao <hychao@...omium.org>
Signed-off-by: Xing Zheng <zhengxing@...k-chips.com>
---

 sound/soc/codecs/da7219.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c
index 737e914..9d08c11 100644
--- a/sound/soc/codecs/da7219.c
+++ b/sound/soc/codecs/da7219.c
@@ -1941,6 +1941,14 @@ static int da7219_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
+	/* Software reset codec. */
+	regmap_write_bits(da7219->regmap, DA7219_ACCDET_CONFIG_1,
+			  DA7219_ACCDET_EN_MASK, 0);
+	regmap_write_bits(da7219->regmap, DA7219_CIF_CTRL,
+			  DA7219_CIF_REG_SOFT_RESET_MASK, 0);
+	regmap_write_bits(da7219->regmap, DA7219_SYSTEM_ACTIVE,
+			  DA7219_SYSTEM_ACTIVE_MASK, 0);
+
 	ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_da7219,
 				     &da7219_dai, 1);
 	if (ret < 0) {
-- 
1.9.1