From: Inha Song <ideal.song@samsung.com>
Date: Wed, 11 Mar 2015 02:04:45 +0000 (+0900)
Subject: ASoC: samsung: Add 32khz clock control logic for codec mclk2
X-Git-Tag: accepted/tizen/common/20150416.090458~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fchanges%2F05%2F36705%2F3;p=platform%2Fkernel%2Flinux-3.10.git

ASoC: samsung: Add 32khz clock control logic for codec mclk2

This patch add 32khz clock control logic for codec's master clock 2(MCLK2).
WM1811 codec can use MCLK1 and MCLK2 as FLL's source clocks.

Change-Id: Ifc57ae1772db9a905b0d1c101442ccf649d53c6b
Signed-off-by: Inha Song <ideal.song@samsung.com>
---

diff --git a/sound/soc/samsung/trats2_wm1811.c b/sound/soc/samsung/trats2_wm1811.c
index 9de4fc3..631c966 100644
--- a/sound/soc/samsung/trats2_wm1811.c
+++ b/sound/soc/samsung/trats2_wm1811.c
@@ -111,6 +111,7 @@ struct trats2_wm1811 {
 	struct snd_soc_jack jack;
 	struct snd_soc_codec *codec;
 	struct clk *codec_mclk;
+	struct clk *codec_32khz;
 
 	int gpio_mic_bias[MIC_MAX];
 	int gpio_vps_en;
@@ -867,6 +868,12 @@ static int machine_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 	if (ret < 0)
 		return ret;
 
+	ret = clk_prepare_enable(machine->codec_32khz);
+	if (ret < 0) {
+		clk_disable_unprepare(machine->codec_mclk);
+		return ret;
+	}
+
 	ret = snd_soc_add_card_controls(card, card_controls,
 					ARRAY_SIZE(card_controls));
 	if (ret != 0)
@@ -1151,6 +1158,7 @@ static int machine_card_suspend_post(struct snd_soc_card *card)
 		codec_micd_set_rate(codec);
 
 		clk_disable_unprepare(machine->codec_mclk);
+		clk_disable_unprepare(machine->codec_32khz);
 	}
 
 	snd_soc_dapm_sync(&codec->dapm);
@@ -1165,8 +1173,10 @@ static int machine_card_resume_pre(struct snd_soc_card *card)
 	int reg = 0;
 	int ret;
 
-	if (!codec->active)
+	if (!codec->active) {
 		clk_prepare_enable(machine->codec_mclk);
+		clk_prepare_enable(machine->codec_32khz);
+	}
 
 	/* change sysclk from mclk2 to pll out of mclk1 */
 	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
@@ -1290,6 +1300,12 @@ static int trats2_wm1811_probe(struct platform_device *pdev)
 		return PTR_ERR(machine->codec_mclk);
 	}
 
+	machine->codec_32khz = clk_get(&pdev->dev, "32khz");
+	if (IS_ERR(machine->codec_32khz)) {
+		dev_err(&pdev->dev, "failed to get 32khz clock\n");
+		return PTR_ERR(machine->codec_32khz);
+	}
+
 	out_mux = clk_get(&pdev->dev, "out-mux");
 	if (IS_ERR(out_mux)) {
 		dev_err(&pdev->dev, "failed to get out mux clock\n");
@@ -1335,6 +1351,7 @@ static int trats2_wm1811_remove(struct platform_device *pdev)
 
 	snd_soc_unregister_card(card);
 	clk_put(machine->codec_mclk);
+	clk_put(machine->codec_32khz);
 	clk_put(machine->clk_pll);
 	return 0;
 }