Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 20:22:09 +00:00
Code Issues Packages Projects Releases Wiki Activity

ASoC: Adds support for TAS575x to the pcm512x driver

Browse Source 
Enables the existing pcm512x driver to control the almost
compatible TAS5754 and -76 amplifers. Both amplifiers support
only an I2C interface and the internal PLL must be always
on to provide necessary clocks to the amplifier section.
Tested on TAS5756 with support from Andreas Arbesser-Krasser
from Texas Instruments <a-krasser@ti.com>

Signed-off-by: Joerg Schambacher <joerg.hifiberry@gmail.com>
Link: https://lore.kernel.org/r/20230929150722.405415-1-joerg.hifiberry@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Joerg Schambacher 2023-09-29 17:07:20 +02:00 committed by Mark Brown
parent a9b696c851
commit 1f81780526
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 37 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sound/soc/codecs/pcm512x-i2c.c
View File

@ -39,6 +39,8 @@ static const struct i2c_device_id pcm512x_i2c_id[] = {
{ "pcm5122", },
{ "pcm5141", },
{ "pcm5142", },
{ "tas5754", },
{ "tas5756", },
{ }
};
MODULE_DEVICE_TABLE(i2c, pcm512x_i2c_id);
@ -49,6 +51,8 @@ static const struct of_device_id pcm512x_of_match[] = {
{ .compatible = "ti,pcm5122", },
{ .compatible = "ti,pcm5141", },
{ .compatible = "ti,pcm5142", },
{ .compatible = "ti,tas5754", },
{ .compatible = "ti,tas5756", },
{ }
};
MODULE_DEVICE_TABLE(of, pcm512x_of_match);

36
sound/soc/codecs/pcm512x.c
View File

@ -48,6 +48,7 @@ struct pcm512x_priv {
int mute;
struct mutex mutex;
unsigned int bclk_ratio;
int force_pll_on;
};
/*
@ -1258,10 +1259,34 @@ static int pcm512x_hw_params(struct snd_pcm_substream *substream,
return ret;
}
ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN,
PCM512x_PLLE, 0);
if (!pcm512x->force_pll_on) {
ret = regmap_update_bits(pcm512x->regmap,
PCM512x_PLL_EN, PCM512x_PLLE, 0);
} else {
/* provide minimum PLL config for TAS575x clocking
* and leave PLL enabled
*/
ret = regmap_write(pcm512x->regmap,
PCM512x_PLL_COEFF_0, 0x01);
if (ret != 0) {
dev_err(component->dev,
"Failed to set pll coefficient: %d\n", ret);
return ret;
}
ret = regmap_write(pcm512x->regmap,
PCM512x_PLL_COEFF_1, 0x04);
if (ret != 0) {
dev_err(component->dev,
"Failed to set pll coefficient: %d\n", ret);
return ret;
}
ret = regmap_write(pcm512x->regmap,
PCM512x_PLL_EN, 0x01);
dev_dbg(component->dev, "Enabling PLL for TAS575x\n");
}
if (ret != 0) {
dev_err(component->dev, "Failed to disable pll: %d\n", ret);
dev_err(component->dev, "Failed to set pll mode: %d\n", ret);
return ret;
}
}
@ -1659,6 +1684,11 @@ int pcm512x_probe(struct device *dev, struct regmap *regmap)
ret = -EINVAL;
goto err_pm;
}
if (!strcmp(np->name, "tas5756") ||
!strcmp(np->name, "tas5754"))
pcm512x->force_pll_on = 1;
dev_dbg(dev, "Device ID: %s\n", np->name);
}
#endif