linux-kernel - [PATCH] atmel ac97c: using software reset instead hardware reset if not available

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Message-Id: <1324288672-29556-1-git-send-email-voice.shen@atmel.com>
Date:	Mon, 19 Dec 2011 17:57:52 +0800
From:	voice <voice.shen@...el.com>
To:	tiwai@...e.de
Cc:	linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org,
	alsa-devel@...a-project.org, nicolas.ferre@...el.com,
	Hans-Christian.Egtvedt@...el.com, jm.lin@...el.com,
	hong.xu@...el.com, voice <voice.shen@...el.com>
Subject: [PATCH] atmel ac97c: using software reset instead hardware reset if not available

Using software reset instead hardware reset if not available

Signed-off-by: Bo Shen <voice.shen@...el.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
 sound/atmel/ac97c.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
index 6e5adde..73516f6 100644
--- a/sound/atmel/ac97c.c
+++ b/sound/atmel/ac97c.c
@@ -899,6 +899,10 @@ static void atmel_ac97c_reset(struct atmel_ac97c *chip)
 		/* AC97 v2.2 specifications says minimum 1 us. */
 		udelay(2);
 		gpio_set_value(chip->reset_pin, 1);
+	} else {
+		ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA);
+		udelay(2);
+		ac97c_writel(chip, MR, AC97C_MR_ENA);
 	}
 }
 
-- 
1.6.3.3

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