[alsa-devel] Applied "ASoC: fsl_ssi: enable IPG clock during AC'97 reg access" to the asoc tree

[Mark Brown]

The patch

   ASoC: fsl_ssi: enable IPG clock during AC'97 reg access

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 8277df3c66f1a8cecfadc29f7394f623263b4445 Mon Sep 17 00:00:00 2001
From: "Maciej S. Szmigiero" <mail at maciej.szmigiero.name>
Date: Wed, 5 Aug 2015 17:21:35 +0200
Subject: [PATCH] ASoC: fsl_ssi: enable IPG clock during AC'97 reg access

IPG clock have to be enabled during AC'97 CODEC register
access in fsl_ssi driver.

Signed-off-by: Maciej Szmigiero <mail at maciej.szmigiero.name>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/fsl/fsl_ssi.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index c7647e0..9c46c7d 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -1127,10 +1127,17 @@ static void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 	struct regmap *regs = fsl_ac97_data->regs;
 	unsigned int lreg;
 	unsigned int lval;
+	int ret;
 
 	if (reg > 0x7f)
 		return;
 
+	ret = clk_prepare_enable(fsl_ac97_data->clk);
+	if (ret) {
+		pr_err("ac97 write clk_prepare_enable failed: %d\n",
+			ret);
+		return;
+	}
 
 	lreg = reg <<  12;
 	regmap_write(regs, CCSR_SSI_SACADD, lreg);
@@ -1141,6 +1148,8 @@ static void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 	regmap_update_bits(regs, CCSR_SSI_SACNT, CCSR_SSI_SACNT_RDWR_MASK,
 			CCSR_SSI_SACNT_WR);
 	udelay(100);
+
+	clk_disable_unprepare(fsl_ac97_data->clk);
 }
 
 static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
@@ -1151,6 +1160,14 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
 	unsigned short val = -1;
 	u32 reg_val;
 	unsigned int lreg;
+	int ret;
+
+	ret = clk_prepare_enable(fsl_ac97_data->clk);
+	if (ret) {
+		pr_err("ac97 read clk_prepare_enable failed: %d\n",
+			ret);
+		return -1;
+	}
 
 	lreg = (reg & 0x7f) <<  12;
 	regmap_write(regs, CCSR_SSI_SACADD, lreg);
@@ -1162,6 +1179,8 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
 	regmap_read(regs, CCSR_SSI_SACDAT, &reg_val);
 	val = (reg_val >> 4) & 0xffff;
 
+	clk_disable_unprepare(fsl_ac97_data->clk);
+
 	return val;
 }
 
-- 
2.5.0