diff options
Diffstat (limited to 'sound/soc/jz4740/jz4740-i2s.c')
| -rw-r--r-- | sound/soc/jz4740/jz4740-i2s.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c index d3d45c6f064..07f77815a58 100644 --- a/sound/soc/jz4740/jz4740-i2s.c +++ b/sound/soc/jz4740/jz4740-i2s.c @@ -14,6 +14,8 @@ #include <linux/init.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -83,6 +85,8 @@ #define JZ_AIC_I2S_STATUS_BUSY BIT(2) #define JZ_AIC_CLK_DIV_MASK 0xf +#define I2SDIV_DV_SHIFT 8 +#define I2SDIV_DV_MASK (0xf << I2SDIV_DV_SHIFT) struct jz4740_i2s { struct resource *mem; @@ -237,10 +241,14 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream, { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); unsigned int sample_size; - uint32_t ctrl; + uint32_t ctrl, div_reg; + int div; ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL); + div_reg = jz4740_i2s_read(i2s, JZ_REG_AIC_CLK_DIV); + div = clk_get_rate(i2s->clk_i2s) / (64 * params_rate(params)); + switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: sample_size = 0; @@ -264,7 +272,10 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream, ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET; } + div_reg &= ~I2SDIV_DV_MASK; + div_reg |= (div - 1) << I2SDIV_DV_SHIFT; jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl); + jz4740_i2s_write(i2s, JZ_REG_AIC_CLK_DIV, div_reg); return 0; } @@ -415,6 +426,13 @@ static const struct snd_soc_component_driver jz4740_i2s_component = { .name = "jz4740-i2s", }; +#ifdef CONFIG_OF +static const struct of_device_id jz4740_of_matches[] = { + { .compatible = "ingenic,jz4740-i2s" }, + { /* sentinel */ } +}; +#endif + static int jz4740_i2s_dev_probe(struct platform_device *pdev) { struct jz4740_i2s *i2s; @@ -455,6 +473,7 @@ static struct platform_driver jz4740_i2s_driver = { .probe = jz4740_i2s_dev_probe, .driver = { .name = "jz4740-i2s", + .of_match_table = of_match_ptr(jz4740_of_matches) }, }; |