This is a note to let you know that I've just added the patch titled
Revert "ASoC: atmel: Remove system clock tree configuration for at91sam9g20ek"
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-asoc-atmel-remove-system-clock-tree-configuration-for-at91sam9g20ek.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0586f3b2e1bd332bc455b41bc5e19028c0fa2228 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 18 Jan 2024 11:14:14 +0100
Subject: Revert "ASoC: atmel: Remove system clock tree configuration for at91sam9g20ek"
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
This reverts commit bc7d0133181e5f33ac33ca4f6bb2bce876c8ad88 which is
commit c775cbf62ed4911e4f0f23880f01815753123690 upstream.
It is reported to cause problems, so drop it from the 5.15.y tree for now.
Link: https://lore.kernel.org/r/845b3053-d47b-4717-9665-79b120da133b@xxxxxxxxxxxxx
Reported-by: Mark Brown <broonie@xxxxxxxxxx>
Cc: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx>
Cc: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/atmel/sam9g20_wm8731.c | 61 +++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -46,6 +46,35 @@
*/
#undef ENABLE_MIC_INPUT
+static struct clk *mclk;
+
+static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ static int mclk_on;
+ int ret = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ case SND_SOC_BIAS_PREPARE:
+ if (!mclk_on)
+ ret = clk_enable(mclk);
+ if (ret == 0)
+ mclk_on = 1;
+ break;
+
+ case SND_SOC_BIAS_OFF:
+ case SND_SOC_BIAS_STANDBY:
+ if (mclk_on)
+ clk_disable(mclk);
+ mclk_on = 0;
+ break;
+ }
+
+ return ret;
+}
+
static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
SND_SOC_DAPM_MIC("Int Mic", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
@@ -106,6 +135,7 @@ static struct snd_soc_card snd_soc_at91s
.owner = THIS_MODULE,
.dai_link = &at91sam9g20ek_dai,
.num_links = 1,
+ .set_bias_level = at91sam9g20ek_set_bias_level,
.dapm_widgets = at91sam9g20ek_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
@@ -118,6 +148,7 @@ static int at91sam9g20ek_audio_probe(str
{
struct device_node *np = pdev->dev.of_node;
struct device_node *codec_np, *cpu_np;
+ struct clk *pllb;
struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
int ret;
@@ -131,6 +162,31 @@ static int at91sam9g20ek_audio_probe(str
return -EINVAL;
}
+ /*
+ * Codec MCLK is supplied by PCK0 - set it up.
+ */
+ mclk = clk_get(NULL, "pck0");
+ if (IS_ERR(mclk)) {
+ dev_err(&pdev->dev, "Failed to get MCLK\n");
+ ret = PTR_ERR(mclk);
+ goto err;
+ }
+
+ pllb = clk_get(NULL, "pllb");
+ if (IS_ERR(pllb)) {
+ dev_err(&pdev->dev, "Failed to get PLLB\n");
+ ret = PTR_ERR(pllb);
+ goto err_mclk;
+ }
+ ret = clk_set_parent(mclk, pllb);
+ clk_put(pllb);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set MCLK parent\n");
+ goto err_mclk;
+ }
+
+ clk_set_rate(mclk, MCLK_RATE);
+
card->dev = &pdev->dev;
/* Parse device node info */
@@ -174,6 +230,9 @@ static int at91sam9g20ek_audio_probe(str
return ret;
+err_mclk:
+ clk_put(mclk);
+ mclk = NULL;
err:
atmel_ssc_put_audio(0);
return ret;
@@ -183,6 +242,8 @@ static int at91sam9g20ek_audio_remove(st
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
+ clk_disable(mclk);
+ mclk = NULL;
snd_soc_unregister_card(card);
atmel_ssc_put_audio(0);
Patches currently in stable-queue which might be from gregkh@xxxxxxxxxxxxxxxxxxx are
queue-5.15/acpi-resource-add-another-dmi-match-for-the-tongfang-gmxxgxx.patch
queue-5.15/debugfs-fix-automount-d_fsdata-usage.patch
queue-5.15/f2fs-explicitly-null-terminate-the-xattr-list.patch
queue-5.15/revert-asoc-atmel-remove-system-clock-tree-configuration-for-at91sam9g20ek.patch
