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ASoC: spacemit: add K3 SoC support with additional clocks

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Add support for the SpacemiT K3 SoC I2S controller, which shares the
same IP as K1 but requires additional clocks: sysclk_div, c_sysclk,
and c_bclk. These clocks only exist on K3 and are not present on K1.
The sysclk_div clock is present on most K3 I2S controllers except I2S1.
The c_sysclk and c_bclk clocks are shared across multiple I2S
controllers on K3.

Use devm_clk_get_optional_enabled() to acquire these clocks so that
the driver works on both K1 (where they are absent) and K3 without
needing SoC-specific match data. For K3, the sysclk_div rate is set
before sysclk in set_sysclk, and the common clock rates are configured
in hw_params based on the sample rate.

Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Link: https://patch.msgid.link/20260522-k3-i2s-v3-2-08e3eb811d93@linux.spacemit.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Troy Mitchell 2026-05-22 21:12:15 +08:00 committed by Mark Brown
parent 6bc6b28c03
commit 1c6ca2ca5c
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 35 additions and 1 deletions
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36
sound/soc/spacemit/k1_i2s.c
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@ -53,6 +53,9 @@ struct spacemit_i2s_dev {
struct clk *sysclk;
struct clk *bclk;
struct clk *sspa_clk;
struct clk *sysclk_div;
struct clk *c_sysclk;
struct clk *c_bclk;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
@ -206,6 +209,14 @@ static int spacemit_i2s_hw_params(struct snd_pcm_substream *substream,
params_rate(params) *
data_bits;
ret = clk_set_rate(i2s->c_sysclk, bclk_rate * 2);
if (ret)
return ret;
ret = clk_set_rate(i2s->c_bclk, bclk_rate);
if (ret)
return ret;
ret = clk_set_rate(i2s->bclk, bclk_rate);
if (ret)
return ret;
@ -217,10 +228,17 @@ static int spacemit_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
unsigned int freq, int dir)
{
struct spacemit_i2s_dev *i2s = dev_get_drvdata(cpu_dai->dev);
int ret;
if (freq == 0)
return 0;
if (i2s->sysclk_div) {
ret = clk_set_rate(i2s->sysclk_div, freq);
if (ret)
return ret;
}
return clk_set_rate(i2s->sysclk, freq);
}
@ -436,6 +454,21 @@ static int spacemit_i2s_probe(struct platform_device *pdev)
return dev_err_probe(i2s->dev, PTR_ERR(i2s->sspa_clk),
"failed to enable sspa clock\n");
i2s->sysclk_div = devm_clk_get_optional_enabled(i2s->dev, "sysclk_div");
if (IS_ERR(i2s->sysclk_div))
return dev_err_probe(i2s->dev, PTR_ERR(i2s->sysclk_div),
"failed to enable sysclk_div clock\n");
i2s->c_sysclk = devm_clk_get_optional_enabled(i2s->dev, "c_sysclk");
if (IS_ERR(i2s->c_sysclk))
return dev_err_probe(i2s->dev, PTR_ERR(i2s->c_sysclk),
"failed to enable c_sysclk clock\n");
i2s->c_bclk = devm_clk_get_optional_enabled(i2s->dev, "c_bclk");
if (IS_ERR(i2s->c_bclk))
return dev_err_probe(i2s->dev, PTR_ERR(i2s->c_bclk),
"failed to enable c_bclk clock\n");
i2s->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(i2s->base))
return dev_err_probe(i2s->dev, PTR_ERR(i2s->base), "failed to map registers\n");
@ -462,6 +495,7 @@ static int spacemit_i2s_probe(struct platform_device *pdev)
static const struct of_device_id spacemit_i2s_of_match[] = {
{ .compatible = "spacemit,k1-i2s", },
{ .compatible = "spacemit,k3-i2s", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, spacemit_i2s_of_match);
@ -476,4 +510,4 @@ static struct platform_driver spacemit_i2s_driver = {
module_platform_driver(spacemit_i2s_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("I2S bus driver for SpacemiT K1 SoC");
MODULE_DESCRIPTION("I2S bus driver for SpacemiT K1/K3 SoC");