lkml.org 
[lkml]   [2018]   [Apr]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[alsa-devel][RESEND PATCH 3/3 v3] ASoC: TSCS42xx: Add CCF support to get sysclk
Date
The TSCS42xx relies on set_sysclk to get a unique clock id and rate,
which prevents it from being used with the simple-card.

Remove set_sysclk callback
Add CCF support to get clock id and rate
Add clocks and clock-names to device tree binding

Signed-off-by: Steven Eckhoff <steven.eckhoff.opensource@gmail.com>
---
.../devicetree/bindings/sound/tscs42xx.txt | 6 ++
sound/soc/codecs/tscs42xx.c | 104 ++++++++++++++-------
sound/soc/codecs/tscs42xx.h | 2 +-
3 files changed, 75 insertions(+), 37 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/tscs42xx.txt b/Documentation/devicetree/bindings/sound/tscs42xx.txt
index 2ac2f0996697..7eea32e9d078 100644
--- a/Documentation/devicetree/bindings/sound/tscs42xx.txt
+++ b/Documentation/devicetree/bindings/sound/tscs42xx.txt
@@ -8,9 +8,15 @@ Required Properties:
- reg : <0x71> for analog mic
<0x69> for digital mic

+ - clock-names: Must one of the following "mclk1", "xtal", "mclk2"
+
+ - clocks: phandle of the clock that provides the codec sysclk
+
Example:

wookie: codec@69 {
compatible = "tempo,tscs42A2";
reg = <0x69>;
+ clock-names = "xtal";
+ clocks = <&audio_xtal>;
};
diff --git a/sound/soc/codecs/tscs42xx.c b/sound/soc/codecs/tscs42xx.c
index bf207b0345f1..d18ff17719cc 100644
--- a/sound/soc/codecs/tscs42xx.c
+++ b/sound/soc/codecs/tscs42xx.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/mutex.h>
+#include <linux/clk.h>
#include <sound/tlv.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
@@ -40,6 +41,9 @@ struct tscs42xx {
struct mutex pll_lock;

struct regmap *regmap;
+
+ struct clk *sysclk;
+ int sysclk_src_id;
};

struct coeff_ram_ctl {
@@ -1251,13 +1255,46 @@ static int tscs42xx_set_dai_bclk_ratio(struct snd_soc_dai *codec_dai,
return 0;
}

-static int tscs42xx_set_dai_sysclk(struct snd_soc_dai *codec_dai,
- int clk_id, unsigned int freq, int dir)
+static const struct snd_soc_dai_ops tscs42xx_dai_ops = {
+ .hw_params = tscs42xx_hw_params,
+ .mute_stream = tscs42xx_mute_stream,
+ .set_fmt = tscs42xx_set_dai_fmt,
+ .set_bclk_ratio = tscs42xx_set_dai_bclk_ratio,
+};
+
+static int part_is_valid(struct tscs42xx *tscs42xx)
{
- struct snd_soc_component *component = codec_dai->component;
+ int val;
int ret;
+ unsigned int reg;
+
+ ret = regmap_read(tscs42xx->regmap, R_DEVIDH, &reg);
+ if (ret < 0)
+ return ret;

- switch (clk_id) {
+ val = reg << 8;
+ ret = regmap_read(tscs42xx->regmap, R_DEVIDL, &reg);
+ if (ret < 0)
+ return ret;
+
+ val |= reg;
+
+ switch (val) {
+ case 0x4A74:
+ case 0x4A73:
+ return true;
+ default:
+ return false;
+ };
+}
+
+static int set_sysclk(struct snd_soc_component *component)
+{
+ struct tscs42xx *tscs42xx = snd_soc_component_get_drvdata(component);
+ unsigned long freq;
+ int ret;
+
+ switch (tscs42xx->sysclk_src_id) {
case TSCS42XX_PLL_SRC_XTAL:
case TSCS42XX_PLL_SRC_MCLK1:
ret = snd_soc_component_write(component, R_PLLREFSEL,
@@ -1285,6 +1322,7 @@ static int tscs42xx_set_dai_sysclk(struct snd_soc_dai *codec_dai,
return -EINVAL;
}

+ freq = clk_get_rate(tscs42xx->sysclk);
ret = set_pll_ctl_from_input_freq(component, freq);
if (ret < 0) {
dev_err(component->dev,
@@ -1295,41 +1333,13 @@ static int tscs42xx_set_dai_sysclk(struct snd_soc_dai *codec_dai,
return 0;
}

-static const struct snd_soc_dai_ops tscs42xx_dai_ops = {
- .hw_params = tscs42xx_hw_params,
- .mute_stream = tscs42xx_mute_stream,
- .set_fmt = tscs42xx_set_dai_fmt,
- .set_bclk_ratio = tscs42xx_set_dai_bclk_ratio,
- .set_sysclk = tscs42xx_set_dai_sysclk,
-};
-
-static int part_is_valid(struct tscs42xx *tscs42xx)
+static int tscs42xx_probe(struct snd_soc_component *component)
{
- int val;
- int ret;
- unsigned int reg;
-
- ret = regmap_read(tscs42xx->regmap, R_DEVIDH, &reg);
- if (ret < 0)
- return ret;
-
- val = reg << 8;
- ret = regmap_read(tscs42xx->regmap, R_DEVIDL, &reg);
- if (ret < 0)
- return ret;
-
- val |= reg;
-
- switch (val) {
- case 0x4A74:
- case 0x4A73:
- return true;
- default:
- return false;
- };
+ return set_sysclk(component);
}

static const struct snd_soc_component_driver soc_codec_dev_tscs42xx = {
+ .probe = tscs42xx_probe,
.dapm_widgets = tscs42xx_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tscs42xx_dapm_widgets),
.dapm_routes = tscs42xx_intercon,
@@ -1387,11 +1397,15 @@ static const struct reg_sequence tscs42xx_patch[] = {
{ R_AIC2, RV_AIC2_BLRCM_DAC_BCLK_LRCLK_SHARED },
};

+static char const * const src_names[TSCS42XX_PLL_SRC_CNT] = {
+ "xtal", "mclk1", "mclk2"};
+
static int tscs42xx_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct tscs42xx *tscs42xx;
- int ret = 0;
+ int src;
+ int ret;

tscs42xx = devm_kzalloc(&i2c->dev, sizeof(*tscs42xx), GFP_KERNEL);
if (!tscs42xx) {
@@ -1402,6 +1416,24 @@ static int tscs42xx_i2c_probe(struct i2c_client *i2c,
}
i2c_set_clientdata(i2c, tscs42xx);

+ for (src = TSCS42XX_PLL_SRC_XTAL; src < TSCS42XX_PLL_SRC_CNT; src++) {
+ tscs42xx->sysclk = devm_clk_get(&i2c->dev, src_names[src]);
+ if (!IS_ERR(tscs42xx->sysclk)) {
+ break;
+ } else if (PTR_ERR(tscs42xx->sysclk) != -ENOENT) {
+ ret = PTR_ERR(tscs42xx->sysclk);
+ dev_err(&i2c->dev, "Failed to get sysclk (%d)\n", ret);
+ return ret;
+ }
+ }
+ if (src == TSCS42XX_PLL_SRC_CNT) {
+ ret = -EINVAL;
+ dev_err(&i2c->dev, "Failed to get a valid clock name (%d)\n",
+ ret);
+ return ret;
+ }
+ tscs42xx->sysclk_src_id = src;
+
tscs42xx->regmap = devm_regmap_init_i2c(i2c, &tscs42xx_regmap);
if (IS_ERR(tscs42xx->regmap)) {
ret = PTR_ERR(tscs42xx->regmap);
diff --git a/sound/soc/codecs/tscs42xx.h b/sound/soc/codecs/tscs42xx.h
index d4a30bcbf64b..814c8f3c4a68 100644
--- a/sound/soc/codecs/tscs42xx.h
+++ b/sound/soc/codecs/tscs42xx.h
@@ -7,10 +7,10 @@
#define __WOOKIE_H__

enum {
- TSCS42XX_PLL_SRC_NONE,
TSCS42XX_PLL_SRC_XTAL,
TSCS42XX_PLL_SRC_MCLK1,
TSCS42XX_PLL_SRC_MCLK2,
+ TSCS42XX_PLL_SRC_CNT,
};

#define R_HPVOLL 0x0
--
2.15.1
\
 
 \ /
  Last update: 2018-04-04 23:51    [W:0.055 / U:0.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site