linux-kernel - [PATCH] ALSA: at73c213: manage SSC clock

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Message-Id: <1452969349-9810-1-git-send-email-mans@mansr.com>
Date:	Sat, 16 Jan 2016 18:35:49 +0000
From:	Mans Rullgard <mans@...sr.com>
To:	Hans-Christian Egtvedt <egtvedt@...fundet.no>
Cc:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ALSA: at73c213: manage SSC clock

Since commit 49af54ff0fc7 ("misc: atmel-ssc: prepare clock only when
request") the SSC driver expects clients to manage the SSC clock.
Update this driver accordingly.

Signed-off-by: Mans Rullgard <mans@...sr.com>
---
 sound/spi/at73c213.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c
index 39522367897c..3b2d0b2be421 100644
--- a/sound/spi/at73c213.c
+++ b/sound/spi/at73c213.c
@@ -981,6 +981,8 @@ static int snd_at73c213_probe(struct spi_device *spi)
 		goto out_card;
 	}
 
+	clk_enable(chip->ssc->clk);
+
 	retval = snd_at73c213_dev_init(card, spi);
 	if (retval)
 		goto out_ssc;
@@ -998,6 +1000,7 @@ static int snd_at73c213_probe(struct spi_device *spi)
 	goto out;
 
 out_ssc:
+	clk_disable(chip->ssc->clk);
 	ssc_free(chip->ssc);
 out_card:
 	snd_card_free(card);
@@ -1066,6 +1069,9 @@ out:
 	/* Stop DAC master clock. */
 	clk_disable(chip->board->dac_clk);
 
+	/* Stop SSC clock. */
+	clk_disable(chip->ssc->clk);
+
 	ssc_free(chip->ssc);
 	snd_card_free(card);
 
@@ -1080,6 +1086,7 @@ static int snd_at73c213_suspend(struct device *dev)
 	struct snd_at73c213 *chip = card->private_data;
 
 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	clk_disable(chip->ssc->clk);
 	clk_disable(chip->board->dac_clk);
 
 	return 0;
@@ -1091,6 +1098,7 @@ static int snd_at73c213_resume(struct device *dev)
 	struct snd_at73c213 *chip = card->private_data;
 
 	clk_enable(chip->board->dac_clk);
+	clk_enable(chip->ssc->clk);
 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
 
 	return 0;
-- 
2.7.0