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[PATCH 0/6] Arizona FLL fixes and Clocking Improvements

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Contents

  [PATCH 0/6] Arizona FLL fixes and Clocking Improvements Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200
    [PATCH 4/6] mfd: arizona: Add gating of external MCLKn clocks Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200
    [PATCH 1/6] ASoC: arizona: Correct handling of FLL theta in synchroniser mode Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200
      Applied "ASoC: arizona: Correct handling of FLL theta in synchroniser mode" to the asoc tree Mark Brown <broonie@kernel.org> - 2016-09-03 13:10 +0200
    [PATCH 6/6] ASoC: arizona: Add gating for source clocks of the FLLs Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200
      Re: [PATCH 6/6] ASoC: arizona: Add gating for source clocks of the FLLs Sylwester Nawrocki <s.nawrocki@samsung.com> - 2016-09-05 10:20 +0200
    [PATCH 3/6] ASoC: arizona: Avoid changing SYNC_ENA whilst the FLL_ENA is set Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200
    [PATCH 5/6] ASoC: arizona: Add gating for clock when used for direct MCLK Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200
      Re: [PATCH 5/6] ASoC: arizona: Add gating for clock when used for  direct MCLK Sylwester Nawrocki <s.nawrocki@samsung.com> - 2016-09-05 10:20 +0200
    [PATCH 2/6] ASoC: arizona: Allow specification of base for arizona_is_enabled_fll Charles Keepax <ckeepax@opensource.wolfsonmicro.com> - 2016-09-02 18:00 +0200

#1475276 — [PATCH 0/6] Arizona FLL fixes and Clocking Improvements

Hi,

The first 3 patches in this series fix some small issues with
the FLL configuration in the driver. The second 3 patches add
support for requesting the input clocks for the CODEC through the
clock framework. This is some what of an intermediate step until
all the clocking itself in the CODEC can be brought under the
clock framework but as there are machine drivers that want to be
merged now with source clocks that require gating and difficult
to resolve issues between the SPI and clock framework an
intermediate solution seems warranted.

Whilst the two halfs of this series do fairly different things,
I have sent them as once series as they touch a lot of the same
code, so this seemed the simpler approach to pushing them both
through. The series is based of Mark's ASoC for-next tree.

Thanks,
Charles

Charles Keepax (5):
  ASoC: arizona: Correct handling of FLL theta in synchroniser mode
  ASoC: arizona: Allow specification of base for arizona_is_enabled_fll
  ASoC: arizona: Avoid changing SYNC_ENA whilst the FLL_ENA is set
  ASoC: arizona: Add gating for clock when used for direct MCLK
  ASoC: arizona: Add gating for source clocks of the FLLs

Sylwester Nawrocki (1):
  mfd: arizona: Add gating of external MCLKn clocks

 drivers/mfd/arizona-core.c       |  30 +++++++++-
 include/linux/mfd/arizona/core.h |   9 +++
 sound/soc/codecs/arizona.c       | 124 +++++++++++++++++++++++++++++++++++----
 sound/soc/codecs/arizona.h       |   2 +
 sound/soc/codecs/cs47l24.c       |   6 +-
 sound/soc/codecs/wm5102.c        |   9 ++-
 sound/soc/codecs/wm5110.c        |  10 +++-
 sound/soc/codecs/wm8997.c        |   9 ++-
 sound/soc/codecs/wm8998.c        |   6 +-
 9 files changed, 179 insertions(+), 26 deletions(-)

-- 
2.1.4

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#1475277 — [PATCH 4/6] mfd: arizona: Add gating of external MCLKn clocks

From: Sylwester Nawrocki <s.nawrocki@samsung.com>

This patch adds requesting of the clocks supplied on MCLK1, MCLK2 pins,
gating of the 32k clock is added to the arizona_clk32k_enable(),
arizona_clk32k_disable() helpers.

It's a temporary change until the CODEC's clock controller gets exposed
through the clk API and is helpful for board configurations where the
MCLK clocks are not provided by always on oscillators.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 drivers/mfd/arizona-core.c       | 30 ++++++++++++++++++++++++++++--
 include/linux/mfd/arizona/core.h |  9 +++++++++
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index e4f97b3..4fa0fae 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -10,6 +10,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
@@ -49,7 +50,15 @@ int arizona_clk32k_enable(struct arizona *arizona)
 		case ARIZONA_32KZ_MCLK1:
 			ret = pm_runtime_get_sync(arizona->dev);
 			if (ret != 0)
-				goto out;
+				goto err_ref;
+			ret = clk_prepare_enable(arizona->mclk[ARIZONA_MCLK1]);
+			if (ret != 0)
+				goto err_pm;
+			break;
+		case ARIZONA_32KZ_MCLK2:
+			ret = clk_prepare_enable(arizona->mclk[ARIZONA_MCLK2]);
+			if (ret != 0)
+				goto err_ref;
 			break;
 		}
 
@@ -58,7 +67,9 @@ int arizona_clk32k_enable(struct arizona *arizona)
 					 ARIZONA_CLK_32K_ENA);
 	}
 
-out:
+err_pm:
+	pm_runtime_put_sync(arizona->dev);
+err_ref:
 	if (ret != 0)
 		arizona->clk32k_ref--;
 
@@ -83,6 +94,10 @@ int arizona_clk32k_disable(struct arizona *arizona)
 		switch (arizona->pdata.clk32k_src) {
 		case ARIZONA_32KZ_MCLK1:
 			pm_runtime_put_sync(arizona->dev);
+			clk_disable_unprepare(arizona->mclk[ARIZONA_MCLK1]);
+			break;
+		case ARIZONA_32KZ_MCLK2:
+			clk_disable_unprepare(arizona->mclk[ARIZONA_MCLK2]);
 			break;
 		}
 	}
@@ -1000,6 +1015,7 @@ static const struct mfd_cell wm8998_devs[] = {
 
 int arizona_dev_init(struct arizona *arizona)
 {
+	const char * const mclk_name[] = { "mclk1", "mclk2" };
 	struct device *dev = arizona->dev;
 	const char *type_name = NULL;
 	unsigned int reg, val, mask;
@@ -1016,6 +1032,16 @@ int arizona_dev_init(struct arizona *arizona)
 	else
 		arizona_of_get_core_pdata(arizona);
 
+	BUILD_BUG_ON(ARRAY_SIZE(arizona->mclk) != ARRAY_SIZE(mclk_name));
+	for (i = 0; i < ARRAY_SIZE(arizona->mclk); i++) {
+		arizona->mclk[i] = devm_clk_get(arizona->dev, mclk_name[i]);
+		if (IS_ERR(arizona->mclk[i])) {
+			dev_info(arizona->dev, "Failed to get %s: %ld\n",
+				 mclk_name[i], PTR_ERR(arizona->mclk[i]));
+			arizona->mclk[i] = NULL;
+		}
+	}
+
 	regcache_cache_only(arizona->regmap, true);
 
 	switch (arizona->type) {
diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h
index 58ab4c0..b9909bb 100644
--- a/include/linux/mfd/arizona/core.h
+++ b/include/linux/mfd/arizona/core.h
@@ -13,6 +13,7 @@
 #ifndef _WM_ARIZONA_CORE_H
 #define _WM_ARIZONA_CORE_H
 
+#include <linux/clk.h>
 #include <linux/interrupt.h>
 #include <linux/notifier.h>
 #include <linux/regmap.h>
@@ -21,6 +22,12 @@
 
 #define ARIZONA_MAX_CORE_SUPPLIES 2
 
+enum {
+	ARIZONA_MCLK1,
+	ARIZONA_MCLK2,
+	ARIZONA_NUM_MCLK
+};
+
 enum arizona_type {
 	WM5102 = 1,
 	WM5110 = 2,
@@ -139,6 +146,8 @@ struct arizona {
 	struct mutex clk_lock;
 	int clk32k_ref;
 
+	struct clk *mclk[ARIZONA_NUM_MCLK];
+
 	bool ctrlif_error;
 
 	struct snd_soc_dapm_context *dapm;
-- 
2.1.4

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#1475281 — [PATCH 1/6] ASoC: arizona: Correct handling of FLL theta in synchroniser mode

Theta/lambda is used to give the fractional portion of the FLL
frequency multiplication. When the synchroniser is active the
reference path lambda value is hard coded in the hardware to
65536. This patch corrects the handling of theta such that it
is scaled to match this denominator, when the synchroniser is
active.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index ccb3ca2..ded235f 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1920,8 +1920,8 @@ static struct {
 
 struct arizona_fll_cfg {
 	int n;
-	int theta;
-	int lambda;
+	unsigned int theta;
+	unsigned int lambda;
 	int refdiv;
 	int outdiv;
 	int fratio;
@@ -2233,6 +2233,10 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 	    fll->ref_src != fll->sync_src) {
 		arizona_calc_fll(fll, &cfg, fll->ref_freq, false);
 
+		/* Ref path hardcodes lambda to 65536 when sync is on */
+		if (fll->sync_src >= 0 && cfg.lambda)
+			cfg.theta = (cfg.theta * (1 << 16)) / cfg.lambda;
+
 		arizona_apply_fll(arizona, fll->base, &cfg, fll->ref_src,
 				  false);
 		if (fll->sync_src >= 0) {
-- 
2.1.4

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#1475595 — Applied "ASoC: arizona: Correct handling of FLL theta in synchroniser mode" to the asoc tree

The patch

   ASoC: arizona: Correct handling of FLL theta in synchroniser mode

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 e87d9ae8886783f3a5a8dd6863e8261783214e3b Mon Sep 17 00:00:00 2001
From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Date: Fri, 2 Sep 2016 16:52:43 +0100
Subject: [PATCH] ASoC: arizona: Correct handling of FLL theta in synchroniser
 mode

Theta/lambda is used to give the fractional portion of the FLL
frequency multiplication. When the synchroniser is active the
reference path lambda value is hard coded in the hardware to
65536. This patch corrects the handling of theta such that it
is scaled to match this denominator, when the synchroniser is
active.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/arizona.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index ccb3ca2f77a4..ded235f3090f 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1920,8 +1920,8 @@ static struct {
 
 struct arizona_fll_cfg {
 	int n;
-	int theta;
-	int lambda;
+	unsigned int theta;
+	unsigned int lambda;
 	int refdiv;
 	int outdiv;
 	int fratio;
@@ -2233,6 +2233,10 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 	    fll->ref_src != fll->sync_src) {
 		arizona_calc_fll(fll, &cfg, fll->ref_freq, false);
 
+		/* Ref path hardcodes lambda to 65536 when sync is on */
+		if (fll->sync_src >= 0 && cfg.lambda)
+			cfg.theta = (cfg.theta * (1 << 16)) / cfg.lambda;
+
 		arizona_apply_fll(arizona, fll->base, &cfg, fll->ref_src,
 				  false);
 		if (fll->sync_src >= 0) {
-- 
2.9.3

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#1475288 — [PATCH 6/6] ASoC: arizona: Add gating for source clocks of the FLLs

Whilst ultimately we would like to move all the clocking over to the
clock framework, as an intermediate step to get people going for now
enable the source clocks for FLLs as they are powered up.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c | 60 +++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 54 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 2a019e9..780cf4f 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -2244,6 +2244,42 @@ static int arizona_is_enabled_fll(struct arizona_fll *fll, int base)
 	return reg & ARIZONA_FLL1_ENA;
 }
 
+static int arizona_set_fll_clks(struct arizona_fll *fll, int base, bool ena)
+{
+	struct arizona *arizona = fll->arizona;
+	unsigned int val;
+	struct clk *clk;
+	int ret;
+
+	ret = regmap_read(arizona->regmap, base + 6, &val);
+	if (ret != 0) {
+		arizona_fll_err(fll, "Failed to read current source: %d\n",
+				ret);
+		return ret;
+	}
+
+	val &= ARIZONA_FLL1_CLK_REF_SRC_MASK;
+	val >>= ARIZONA_FLL1_CLK_REF_SRC_SHIFT;
+
+	switch (val) {
+	case ARIZONA_FLL_SRC_MCLK1:
+		clk = arizona->mclk[ARIZONA_MCLK1];
+		break;
+	case ARIZONA_FLL_SRC_MCLK2:
+		clk = arizona->mclk[ARIZONA_MCLK2];
+		break;
+	default:
+		return 0;
+	}
+
+	if (ena) {
+		return clk_prepare_enable(clk);
+	} else {
+		clk_disable_unprepare(clk);
+		return 0;
+	}
+}
+
 static int arizona_enable_fll(struct arizona_fll *fll)
 {
 	struct arizona *arizona = fll->arizona;
@@ -2266,6 +2302,10 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 		udelay(32);
 		regmap_update_bits_async(fll->arizona->regmap, fll->base + 0x9,
 					 ARIZONA_FLL1_GAIN_MASK, 0);
+
+		if (arizona_is_enabled_fll(fll, fll->base + 0x10) > 0)
+			arizona_set_fll_clks(fll, fll->base + 0x10, false);
+		arizona_set_fll_clks(fll, fll->base, false);
 	}
 
 	/*
@@ -2320,10 +2360,13 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 	if (!already_enabled)
 		pm_runtime_get_sync(arizona->dev);
 
-	if (use_sync)
+	if (use_sync) {
+		arizona_set_fll_clks(fll, fll->base + 0x10, true);
 		regmap_update_bits_async(arizona->regmap, fll->base + 0x11,
 					 ARIZONA_FLL1_SYNC_ENA,
 					 ARIZONA_FLL1_SYNC_ENA);
+	}
+	arizona_set_fll_clks(fll, fll->base, true);
 	regmap_update_bits_async(arizona->regmap, fll->base + 1,
 				 ARIZONA_FLL1_ENA, ARIZONA_FLL1_ENA);
 
@@ -2356,19 +2399,24 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 static void arizona_disable_fll(struct arizona_fll *fll)
 {
 	struct arizona *arizona = fll->arizona;
-	bool change;
+	bool ref_change, sync_change;
 
 	regmap_update_bits_async(arizona->regmap, fll->base + 1,
 				 ARIZONA_FLL1_FREERUN, ARIZONA_FLL1_FREERUN);
 	regmap_update_bits_check(arizona->regmap, fll->base + 1,
-				 ARIZONA_FLL1_ENA, 0, &change);
-	regmap_update_bits(arizona->regmap, fll->base + 0x11,
-			   ARIZONA_FLL1_SYNC_ENA, 0);
+				 ARIZONA_FLL1_ENA, 0, &ref_change);
+	regmap_update_bits_check(arizona->regmap, fll->base + 0x11,
+				 ARIZONA_FLL1_SYNC_ENA, 0, &sync_change);
 	regmap_update_bits_async(arizona->regmap, fll->base + 1,
 				 ARIZONA_FLL1_FREERUN, 0);
 
-	if (change)
+	if (sync_change)
+		arizona_set_fll_clks(fll, fll->base + 0x10, false);
+
+	if (ref_change) {
+		arizona_set_fll_clks(fll, fll->base, false);
 		pm_runtime_put_autosuspend(arizona->dev);
+	}
 }
 
 int arizona_set_fll_refclk(struct arizona_fll *fll, int source,
-- 
2.1.4

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#1476185 — Re: [PATCH 6/6] ASoC: arizona: Add gating for source clocks of the FLLs

On 09/02/2016 05:52 PM, Charles Keepax wrote:
> Whilst ultimately we would like to move all the clocking over to the
> clock framework, as an intermediate step to get people going for now
> enable the source clocks for FLLs as they are powered up.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

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#1475295 — [PATCH 3/6] ASoC: arizona: Avoid changing SYNC_ENA whilst the FLL_ENA is set

For best performance changing the synchroniser state whilst the FLL is
running should be avoided. As this has been done fairly regularly in
practice rather than hard preventing this, simply improve the FLL enable
sequence and give a warning if the user changes the synchroniser state.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 463979f4..be24387 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -2209,12 +2209,15 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 	struct arizona *arizona = fll->arizona;
 	bool use_sync = false;
 	int already_enabled = arizona_is_enabled_fll(fll, fll->base);
+	int sync_enabled = arizona_is_enabled_fll(fll, fll->base + 0x10);
 	struct arizona_fll_cfg cfg;
 	int i;
 	unsigned int val;
 
 	if (already_enabled < 0)
 		return already_enabled;
+	if (sync_enabled < 0)
+		return sync_enabled;
 
 	if (already_enabled) {
 		/* Facilitate smooth refclk across the transition */
@@ -2259,6 +2262,9 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 		return -EINVAL;
 	}
 
+	if (already_enabled && !!sync_enabled != use_sync)
+		arizona_fll_warn(fll, "Synchroniser changed on active FLL\n");
+
 	/*
 	 * Increase the bandwidth if we're not using a low frequency
 	 * sync source.
@@ -2274,12 +2280,12 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 	if (!already_enabled)
 		pm_runtime_get_sync(arizona->dev);
 
-	regmap_update_bits_async(arizona->regmap, fll->base + 1,
-				 ARIZONA_FLL1_ENA, ARIZONA_FLL1_ENA);
 	if (use_sync)
 		regmap_update_bits_async(arizona->regmap, fll->base + 0x11,
 					 ARIZONA_FLL1_SYNC_ENA,
 					 ARIZONA_FLL1_SYNC_ENA);
+	regmap_update_bits_async(arizona->regmap, fll->base + 1,
+				 ARIZONA_FLL1_ENA, ARIZONA_FLL1_ENA);
 
 	if (already_enabled)
 		regmap_update_bits_async(arizona->regmap, fll->base + 1,
-- 
2.1.4

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#1475303 — [PATCH 5/6] ASoC: arizona: Add gating for clock when used for direct MCLK

Whilst ultimately we would like to move all the clocking over to the
clock framework, as an intermediate step to get people going for now
gating the source clocks for SYSCLK/ASYNCCLK when they are configured
to come directly from an MCLK pin.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c | 40 ++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/arizona.h |  2 ++
 sound/soc/codecs/cs47l24.c |  6 ++++--
 sound/soc/codecs/wm5102.c  |  9 +++++++--
 sound/soc/codecs/wm5110.c  | 10 +++++++---
 sound/soc/codecs/wm8997.c  |  9 +++++++--
 sound/soc/codecs/wm8998.c  |  6 ++++--
 7 files changed, 71 insertions(+), 11 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index be24387..2a019e9 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1195,6 +1195,46 @@ static int arizona_set_opclk(struct snd_soc_codec *codec, unsigned int clk,
 	return -EINVAL;
 }
 
+int arizona_clk_ev(struct snd_soc_dapm_widget *w,
+		   struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+	struct arizona *arizona = dev_get_drvdata(codec->dev->parent);
+	unsigned int val;
+	int clk_idx;
+	int ret;
+
+	ret = regmap_read(arizona->regmap, w->reg, &val);
+	if (ret) {
+		dev_err(codec->dev, "Failed to check clock source: %d\n", ret);
+		return ret;
+	}
+
+	val = (val & ARIZONA_SYSCLK_SRC_MASK) >> ARIZONA_SYSCLK_SRC_SHIFT;
+
+	switch (val) {
+	case ARIZONA_CLK_SRC_MCLK1:
+		clk_idx = ARIZONA_MCLK1;
+		break;
+	case ARIZONA_CLK_SRC_MCLK2:
+		clk_idx = ARIZONA_MCLK2;
+		break;
+	default:
+		return 0;
+	}
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		return clk_prepare_enable(arizona->mclk[clk_idx]);
+	case SND_SOC_DAPM_POST_PMD:
+		clk_disable_unprepare(arizona->mclk[clk_idx]);
+		return 0;
+	default:
+		return 0;
+	}
+}
+EXPORT_SYMBOL_GPL(arizona_clk_ev);
+
 int arizona_set_sysclk(struct snd_soc_codec *codec, int clk_id,
 		       int source, unsigned int freq, int dir)
 {
diff --git a/sound/soc/codecs/arizona.h b/sound/soc/codecs/arizona.h
index 69da1ef..1728771 100644
--- a/sound/soc/codecs/arizona.h
+++ b/sound/soc/codecs/arizona.h
@@ -272,6 +272,8 @@ extern int arizona_eq_coeff_put(struct snd_kcontrol *kcontrol,
 extern int arizona_lhpf_coeff_put(struct snd_kcontrol *kcontrol,
 				  struct snd_ctl_elem_value *ucontrol);
 
+extern int arizona_clk_ev(struct snd_soc_dapm_widget *w,
+			  struct snd_kcontrol *kcontrol, int event);
 extern int arizona_set_sysclk(struct snd_soc_codec *codec, int clk_id,
 			      int source, unsigned int freq, int dir);
 
diff --git a/sound/soc/codecs/cs47l24.c b/sound/soc/codecs/cs47l24.c
index 257b152..5e8f979 100644
--- a/sound/soc/codecs/cs47l24.c
+++ b/sound/soc/codecs/cs47l24.c
@@ -335,9 +335,11 @@ static const struct snd_kcontrol_new cs47l24_aec_loopback_mux =
 
 static const struct snd_soc_dapm_widget cs47l24_dapm_widgets[] = {
 SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1,
-		    ARIZONA_SYSCLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_SYSCLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1,
-		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK,
 		    ARIZONA_OPCLK_ENA_SHIFT, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ASYNCOPCLK", ARIZONA_OUTPUT_ASYNC_CLOCK,
diff --git a/sound/soc/codecs/wm5102.c b/sound/soc/codecs/wm5102.c
index ed03ed27..a891344 100644
--- a/sound/soc/codecs/wm5102.c
+++ b/sound/soc/codecs/wm5102.c
@@ -607,6 +607,9 @@ static int wm5102_sysclk_ev(struct snd_soc_dapm_widget *w,
 		break;
 	case SND_SOC_DAPM_PRE_PMD:
 		break;
+	case SND_SOC_DAPM_PRE_PMU:
+	case SND_SOC_DAPM_POST_PMD:
+		return arizona_clk_ev(w, kcontrol, event);
 	default:
 		return 0;
 	}
@@ -1077,9 +1080,11 @@ static const struct snd_kcontrol_new wm5102_aec_loopback_mux =
 static const struct snd_soc_dapm_widget wm5102_dapm_widgets[] = {
 SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1, ARIZONA_SYSCLK_ENA_SHIFT,
 		    0, wm5102_sysclk_ev,
-		    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+		    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD |
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1,
-		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK,
 		    ARIZONA_OPCLK_ENA_SHIFT, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ASYNCOPCLK", ARIZONA_OUTPUT_ASYNC_CLOCK,
diff --git a/sound/soc/codecs/wm5110.c b/sound/soc/codecs/wm5110.c
index 53d35fe..a4331ad 100644
--- a/sound/soc/codecs/wm5110.c
+++ b/sound/soc/codecs/wm5110.c
@@ -183,7 +183,9 @@ static int wm5110_sysclk_ev(struct snd_soc_dapm_widget *w,
 				regmap_write_async(regmap, patch[i].reg,
 						   patch[i].def);
 		break;
-
+	case SND_SOC_DAPM_PRE_PMU:
+	case SND_SOC_DAPM_POST_PMD:
+		return arizona_clk_ev(w, kcontrol, event);
 	default:
 		break;
 	}
@@ -1073,9 +1075,11 @@ static const struct snd_kcontrol_new wm5110_output_anc_src[] = {
 
 static const struct snd_soc_dapm_widget wm5110_dapm_widgets[] = {
 SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1, ARIZONA_SYSCLK_ENA_SHIFT,
-		    0, wm5110_sysclk_ev, SND_SOC_DAPM_POST_PMU),
+		    0, wm5110_sysclk_ev, SND_SOC_DAPM_POST_PMU |
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1,
-		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK,
 		    ARIZONA_OPCLK_ENA_SHIFT, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ASYNCOPCLK", ARIZONA_OUTPUT_ASYNC_CLOCK,
diff --git a/sound/soc/codecs/wm8997.c b/sound/soc/codecs/wm8997.c
index 2f2821b..f5f5d43 100644
--- a/sound/soc/codecs/wm8997.c
+++ b/sound/soc/codecs/wm8997.c
@@ -108,6 +108,9 @@ static int wm8997_sysclk_ev(struct snd_soc_dapm_widget *w,
 		break;
 	case SND_SOC_DAPM_PRE_PMD:
 		break;
+	case SND_SOC_DAPM_PRE_PMU:
+	case SND_SOC_DAPM_POST_PMD:
+		return arizona_clk_ev(w, kcontrol, event);
 	default:
 		return 0;
 	}
@@ -408,9 +411,11 @@ static const struct snd_kcontrol_new wm8997_aec_loopback_mux =
 static const struct snd_soc_dapm_widget wm8997_dapm_widgets[] = {
 SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1, ARIZONA_SYSCLK_ENA_SHIFT,
 		    0, wm8997_sysclk_ev,
-		    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+		    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD |
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1,
-		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK,
 		    ARIZONA_OPCLK_ENA_SHIFT, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ASYNCOPCLK", ARIZONA_OUTPUT_ASYNC_CLOCK,
diff --git a/sound/soc/codecs/wm8998.c b/sound/soc/codecs/wm8998.c
index bcc2e10..3eaa361 100644
--- a/sound/soc/codecs/wm8998.c
+++ b/sound/soc/codecs/wm8998.c
@@ -541,9 +541,11 @@ static const struct snd_kcontrol_new wm8998_aec_loopback_mux[] = {
 
 static const struct snd_soc_dapm_widget wm8998_dapm_widgets[] = {
 SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1,
-		    ARIZONA_SYSCLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_SYSCLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1,
-		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0),
+		    ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, arizona_clk_ev,
+		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK,
 		    ARIZONA_OPCLK_ENA_SHIFT, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ASYNCOPCLK", ARIZONA_OUTPUT_ASYNC_CLOCK,
-- 
2.1.4

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#1476186 — Re: [PATCH 5/6] ASoC: arizona: Add gating for clock when used for direct MCLK

On 09/02/2016 05:52 PM, Charles Keepax wrote:
> Whilst ultimately we would like to move all the clocking over to the
> clock framework, as an intermediate step to get people going for now
> gating the source clocks for SYSCLK/ASYNCCLK when they are configured
> to come directly from an MCLK pin.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

I've tested this patch on TM2 board with WM5110 codec and I didn't
notice any issues.  The clock management looked good with this patch.

Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

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#1475313 — [PATCH 2/6] ASoC: arizona: Allow specification of base for arizona_is_enabled_fll

In preparation for future improvements allow a base to be passed to
arizona_is_enabled_fll, this will allow it to be used to check the state
of the synchroniser path as well.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index ded235f..463979f4 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -2188,13 +2188,13 @@ static void arizona_apply_fll(struct arizona *arizona, unsigned int base,
 				 ARIZONA_FLL1_CTRL_UPD | cfg->n);
 }
 
-static int arizona_is_enabled_fll(struct arizona_fll *fll)
+static int arizona_is_enabled_fll(struct arizona_fll *fll, int base)
 {
 	struct arizona *arizona = fll->arizona;
 	unsigned int reg;
 	int ret;
 
-	ret = regmap_read(arizona->regmap, fll->base + 1, &reg);
+	ret = regmap_read(arizona->regmap, base + 1, &reg);
 	if (ret != 0) {
 		arizona_fll_err(fll, "Failed to read current state: %d\n",
 				ret);
@@ -2208,7 +2208,7 @@ static int arizona_enable_fll(struct arizona_fll *fll)
 {
 	struct arizona *arizona = fll->arizona;
 	bool use_sync = false;
-	int already_enabled = arizona_is_enabled_fll(fll);
+	int already_enabled = arizona_is_enabled_fll(fll, fll->base);
 	struct arizona_fll_cfg cfg;
 	int i;
 	unsigned int val;
-- 
2.1.4

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