[alsa-devel] [PATCH 2/5] ASoC: core: Add widget SND_SOC_DAPM_CLOCK_SUPPLY
Ola Lilja
ola.o.lilja at stericsson.com
Thu May 24 15:26:25 CEST 2012
Adds a supply-widget variant for connection to the clock-framework.
This widget-type corresponds to the variant for regulators.
Signed-off-by: Ola Lilja <ola.o.lilja at stericsson.com>
---
include/sound/soc-dapm.h | 10 ++++++++++
sound/soc/soc-dapm.c | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index e3833d9..05559e5 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -229,6 +229,10 @@ struct device;
{ .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
.shift = wshift, .invert = winvert, \
.event = wevent, .event_flags = wflags}
+#define SND_SOC_DAPM_CLOCK_SUPPLY(wname) \
+{ .id = snd_soc_dapm_clock_supply, .name = wname, \
+ .reg = SND_SOC_NOPM, .event = dapm_clock_event, \
+ .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD }
/* generic widgets */
#define SND_SOC_DAPM_REG(wid, wname, wreg, wshift, wmask, won_val, woff_val) \
@@ -245,6 +249,7 @@ struct device;
.reg = SND_SOC_NOPM, .shift = wdelay, .event = dapm_regulator_event, \
.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD }
+
/* dapm kcontrol types */
#define SOC_DAPM_SINGLE(xname, reg, shift, max, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
@@ -327,6 +332,8 @@ int dapm_reg_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event);
int dapm_regulator_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event);
+int dapm_clock_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event);
/* dapm controls */
int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
@@ -432,6 +439,7 @@ enum snd_soc_dapm_type {
snd_soc_dapm_post, /* machine specific post widget - exec last */
snd_soc_dapm_supply, /* power/clock supply */
snd_soc_dapm_regulator_supply, /* external regulator */
+ snd_soc_dapm_clock_supply, /* external clock */
snd_soc_dapm_aif_in, /* audio interface input */
snd_soc_dapm_aif_out, /* audio interface output */
snd_soc_dapm_siggen, /* signal generator */
@@ -537,6 +545,8 @@ struct snd_soc_dapm_widget {
struct list_head dirty;
int inputs;
int outputs;
+
+ struct clk *clk;
};
struct snd_soc_dapm_update {
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 90ee77d..3bb7a6f 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -35,6 +35,7 @@
#include <linux/debugfs.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
+#include <linux/clk.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -51,6 +52,7 @@ static int dapm_up_seq[] = {
[snd_soc_dapm_pre] = 0,
[snd_soc_dapm_supply] = 1,
[snd_soc_dapm_regulator_supply] = 1,
+ [snd_soc_dapm_clock_supply] = 1,
[snd_soc_dapm_micbias] = 2,
[snd_soc_dapm_dai_link] = 2,
[snd_soc_dapm_dai] = 3,
@@ -92,6 +94,7 @@ static int dapm_down_seq[] = {
[snd_soc_dapm_aif_out] = 10,
[snd_soc_dapm_dai] = 10,
[snd_soc_dapm_dai_link] = 11,
+ [snd_soc_dapm_clock_supply] = 12,
[snd_soc_dapm_regulator_supply] = 12,
[snd_soc_dapm_supply] = 12,
[snd_soc_dapm_post] = 13,
@@ -391,6 +394,7 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
case snd_soc_dapm_vmid:
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_aif_out:
case snd_soc_dapm_dai:
@@ -764,6 +768,7 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
switch (widget->id) {
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
return 0;
default:
break;
@@ -850,6 +855,7 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
switch (widget->id) {
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
return 0;
default:
break;
@@ -996,6 +1002,24 @@ int dapm_regulator_event(struct snd_soc_dapm_widget *w,
}
EXPORT_SYMBOL_GPL(dapm_regulator_event);
+/*
+ * Handler for clock supply widget.
+ */
+int dapm_clock_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ if (!w->clk)
+ return -EIO;
+
+ if (SND_SOC_DAPM_EVENT_ON(event)) {
+ return clk_enable(w->clk);
+ } else {
+ clk_disable(w->clk);
+ return 0;
+ }
+}
+EXPORT_SYMBOL_GPL(dapm_clock_event);
+
static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
{
if (w->power_checked)
@@ -1487,6 +1511,7 @@ static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
switch (w->id) {
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
/* Supplies can't affect their outputs, only their inputs */
break;
default:
@@ -1587,6 +1612,7 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
break;
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
case snd_soc_dapm_micbias:
if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
d->target_bias_level = SND_SOC_BIAS_STANDBY;
@@ -1941,6 +1967,7 @@ static ssize_t dapm_widget_show(struct device *dev,
case snd_soc_dapm_mixer_named_ctl:
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
if (w->name)
count += sprintf(buf + count, "%s: %s\n",
w->name, w->power ? "On":"Off");
@@ -2187,6 +2214,7 @@ static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
case snd_soc_dapm_post:
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_aif_out:
case snd_soc_dapm_dai:
@@ -2873,6 +2901,15 @@ snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
return NULL;
}
break;
+ case snd_soc_dapm_clock_supply:
+ w->clk = clk_get(dapm->dev, w->name);
+ if (IS_ERR(w->clk)) {
+ ret = PTR_ERR(w->clk);
+ dev_err(dapm->dev, "Failed to request %s: %d\n",
+ w->name, ret);
+ return NULL;
+ }
+ break;
default:
break;
}
@@ -2924,6 +2961,7 @@ snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
break;
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
+ case snd_soc_dapm_clock_supply:
w->power_check = dapm_supply_check_power;
break;
case snd_soc_dapm_dai:
--
1.7.8.3
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