openwrt/target/linux/brcm2708/patches-4.19/950-0409-ASoC-tlv320aic32x4-Control-clock-gating-with-CCF.patch

From eea2c82299034bb146f3ad10e8ed4c2d574777df Mon Sep 17 00:00:00 2001
From: Annaliese McDermond <nh6z@nh6z.net>
Date: Thu, 21 Mar 2019 17:58:49 -0700
Subject: [PATCH 409/703] ASoC: tlv320aic32x4: Control clock gating with CCF

commit d25970b5fd51e9fcf0afbe190908ea4049454da4 upstream.

Control the clock gating to the various clock components to use
the CCF.  This allows us to prepare_enalbe only 3 clocks and the
relationships assigned to them will cause upstream clockss to
enable automatically.  Additionally we can do this in a single
call to the CCF.

Signed-off-by: Annaliese McDermond <nh6z@nh6z.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/tlv320aic32x4.c | 67 +++++++-------------------------
 1 file changed, 13 insertions(+), 54 deletions(-)

--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -836,41 +836,25 @@ static int aic32x4_mute(struct snd_soc_d
 static int aic32x4_set_bias_level(struct snd_soc_component *component,
 				  enum snd_soc_bias_level level)
 {
-	struct aic32x4_priv *aic32x4 = snd_soc_component_get_drvdata(component);
 	int ret;
 
+	struct clk_bulk_data clocks[] = {
+		{ .id = "madc" },
+		{ .id = "mdac" },
+		{ .id = "bdiv" },
+	};
+
+	ret = devm_clk_bulk_get(component->dev, ARRAY_SIZE(clocks), clocks);
+	if (ret)
+		return ret;
+
 	switch (level) {
 	case SND_SOC_BIAS_ON:
-		/* Switch on master clock */
-		ret = clk_prepare_enable(aic32x4->mclk);
+		ret = clk_bulk_prepare_enable(ARRAY_SIZE(clocks), clocks);
 		if (ret) {
-			dev_err(component->dev, "Failed to enable master clock\n");
+			dev_err(component->dev, "Failed to enable clocks\n");
 			return ret;
 		}
-
-		/* Switch on PLL */
-		snd_soc_component_update_bits(component, AIC32X4_PLLPR,
-					AIC32X4_PLLEN, AIC32X4_PLLEN);
-
-		/* Switch on NDAC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_NDAC,
-					AIC32X4_NDACEN, AIC32X4_NDACEN);
-
-		/* Switch on MDAC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_MDAC,
-					AIC32X4_MDACEN, AIC32X4_MDACEN);
-
-		/* Switch on NADC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_NADC,
-					AIC32X4_NADCEN, AIC32X4_NADCEN);
-
-		/* Switch on MADC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_MADC,
-					AIC32X4_MADCEN, AIC32X4_MADCEN);
-
-		/* Switch on BCLK_N Divider */
-		snd_soc_component_update_bits(component, AIC32X4_BCLKN,
-					AIC32X4_BCLKEN, AIC32X4_BCLKEN);
 		break;
 	case SND_SOC_BIAS_PREPARE:
 		break;
@@ -879,32 +863,7 @@ static int aic32x4_set_bias_level(struct
 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
 			break;
 
-		/* Switch off BCLK_N Divider */
-		snd_soc_component_update_bits(component, AIC32X4_BCLKN,
-					AIC32X4_BCLKEN, 0);
-
-		/* Switch off MADC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_MADC,
-					AIC32X4_MADCEN, 0);
-
-		/* Switch off NADC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_NADC,
-					AIC32X4_NADCEN, 0);
-
-		/* Switch off MDAC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_MDAC,
-					AIC32X4_MDACEN, 0);
-
-		/* Switch off NDAC Divider */
-		snd_soc_component_update_bits(component, AIC32X4_NDAC,
-					AIC32X4_NDACEN, 0);
-
-		/* Switch off PLL */
-		snd_soc_component_update_bits(component, AIC32X4_PLLPR,
-					AIC32X4_PLLEN, 0);
-
-		/* Switch off master clock */
-		clk_disable_unprepare(aic32x4->mclk);
+		clk_bulk_disable_unprepare(ARRAY_SIZE(clocks), clocks);
 		break;
 	case SND_SOC_BIAS_OFF:
 		break;