Re: [PATCH 04/11] ASoC: jz4740-i2s: Simplify using regmap fields
From: Paul Cercueil
Date: Thu Jul 07 2022 - 05:36:17 EST
Le mer., juil. 6 2022 at 22:13:23 +0100, Aidan MacDonald
<aidanmacdonald.0x0@xxxxxxxxx> a écrit :
The differences between register fields on different SoC versions
can be abstracted away using the regmap field API. This is easier
to understand and extend than comparisons based on the version ID.
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@xxxxxxxxx>
---
sound/soc/jz4740/jz4740-i2s.c | 100
++++++++++++++++++++++++----------
1 file changed, 72 insertions(+), 28 deletions(-)
diff --git a/sound/soc/jz4740/jz4740-i2s.c
b/sound/soc/jz4740/jz4740-i2s.c
index 66a901f56392..cbb89f724f64 100644
--- a/sound/soc/jz4740/jz4740-i2s.c
+++ b/sound/soc/jz4740/jz4740-i2s.c
@@ -91,12 +91,22 @@ enum jz47xx_i2s_version {
struct i2s_soc_info {
enum jz47xx_i2s_version version;
struct snd_soc_dai_driver *dai;
+
+ struct reg_field field_rx_fifo_thresh;
+ struct reg_field field_tx_fifo_thresh;
+ struct reg_field field_i2sdiv_capture;
+ struct reg_field field_i2sdiv_playback;
};
struct jz4740_i2s {
struct resource *mem;
struct regmap *regmap;
+ struct regmap_field *field_rx_fifo_thresh;
+ struct regmap_field *field_tx_fifo_thresh;
+ struct regmap_field *field_i2sdiv_capture;
+ struct regmap_field *field_i2sdiv_playback;
+
struct clk *clk_aic;
struct clk *clk_i2s;
@@ -222,12 +232,12 @@ static int jz4740_i2s_hw_params(struct
snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ struct regmap_field *div_field;
unsigned int sample_size;
- uint32_t ctrl, div_reg;
+ uint32_t ctrl;
int div;
regmap_read(i2s->regmap, JZ_REG_AIC_CTRL, &ctrl);
- regmap_read(i2s->regmap, JZ_REG_AIC_CLK_DIV, &div_reg);
div = clk_get_rate(i2s->clk_i2s) / (64 * params_rate(params));
@@ -250,23 +260,16 @@ static int jz4740_i2s_hw_params(struct
snd_pcm_substream *substream,
else
ctrl &= ~JZ_AIC_CTRL_MONO_TO_STEREO;
- div_reg &= ~I2SDIV_DV_MASK;
- div_reg |= (div - 1) << I2SDIV_DV_SHIFT;
+ div_field = i2s->field_i2sdiv_playback;
} else {
ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK;
ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET;
- if (i2s->soc_info->version >= JZ_I2S_JZ4770) {
- div_reg &= ~I2SDIV_IDV_MASK;
- div_reg |= (div - 1) << I2SDIV_IDV_SHIFT;
- } else {
- div_reg &= ~I2SDIV_DV_MASK;
- div_reg |= (div - 1) << I2SDIV_DV_SHIFT;
- }
+ div_field = i2s->field_i2sdiv_capture;
}
regmap_write(i2s->regmap, JZ_REG_AIC_CTRL, ctrl);
- regmap_write(i2s->regmap, JZ_REG_AIC_CLK_DIV, div_reg);
+ regmap_field_write(div_field, div - 1);
return 0;
}
@@ -342,7 +345,6 @@ static int jz4740_i2s_resume(struct
snd_soc_component *component)
static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- uint32_t conf;
int ret;
ret = clk_prepare_enable(i2s->clk_aic);
@@ -352,22 +354,14 @@ static int jz4740_i2s_dai_probe(struct
snd_soc_dai *dai)
snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
&i2s->capture_dma_data);
- if (i2s->soc_info->version >= JZ_I2S_JZ4760) {
- conf = (7 << JZ4760_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) |
- (8 << JZ4760_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) |
- JZ_AIC_CONF_OVERFLOW_PLAY_LAST |
- JZ_AIC_CONF_I2S |
- JZ_AIC_CONF_INTERNAL_CODEC;
- } else {
- conf = (7 << JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) |
- (8 << JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) |
I believe you can remove these macros completely now that they are
unused. Same goes for I2S_IDV_MASK, etc.
Cheers,
-Paul
- JZ_AIC_CONF_OVERFLOW_PLAY_LAST |
- JZ_AIC_CONF_I2S |
- JZ_AIC_CONF_INTERNAL_CODEC;
- }
-
regmap_write(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
- regmap_write(i2s->regmap, JZ_REG_AIC_CONF, conf);
+
+ regmap_write(i2s->regmap, JZ_REG_AIC_CONF,
+ JZ_AIC_CONF_OVERFLOW_PLAY_LAST |
+ JZ_AIC_CONF_I2S | JZ_AIC_CONF_INTERNAL_CODEC);
+
+ regmap_field_write(i2s->field_rx_fifo_thresh, 7);
+ regmap_field_write(i2s->field_tx_fifo_thresh, 8);
return 0;
}
@@ -414,11 +408,19 @@ static struct snd_soc_dai_driver jz4740_i2s_dai
= {
static const struct i2s_soc_info jz4740_i2s_soc_info = {
.version = JZ_I2S_JZ4740,
.dai = &jz4740_i2s_dai,
+ .field_rx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 12, 15),
+ .field_tx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 8, 11),
+ .field_i2sdiv_capture = REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+ .field_i2sdiv_playback = REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
};
static const struct i2s_soc_info jz4760_i2s_soc_info = {
.version = JZ_I2S_JZ4760,
.dai = &jz4740_i2s_dai,
+ .field_rx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+ .field_tx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+ .field_i2sdiv_capture = REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
+ .field_i2sdiv_playback = REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
};
static struct snd_soc_dai_driver jz4770_i2s_dai = {
@@ -442,11 +444,19 @@ static struct snd_soc_dai_driver jz4770_i2s_dai
= {
static const struct i2s_soc_info jz4770_i2s_soc_info = {
.version = JZ_I2S_JZ4770,
.dai = &jz4770_i2s_dai,
+ .field_rx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+ .field_tx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+ .field_i2sdiv_capture = REG_FIELD(JZ_REG_AIC_CLK_DIV, 8, 11),
+ .field_i2sdiv_playback = REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
};
static const struct i2s_soc_info jz4780_i2s_soc_info = {
.version = JZ_I2S_JZ4780,
.dai = &jz4770_i2s_dai,
+ .field_rx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 24, 27),
+ .field_tx_fifo_thresh = REG_FIELD(JZ_REG_AIC_CONF, 16, 20),
+ .field_i2sdiv_capture = REG_FIELD(JZ_REG_AIC_CLK_DIV, 8, 11),
+ .field_i2sdiv_playback = REG_FIELD(JZ_REG_AIC_CLK_DIV, 0, 3),
};
static const struct snd_soc_component_driver jz4740_i2s_component = {
@@ -465,6 +475,36 @@ static const struct of_device_id
jz4740_of_matches[] = {
};
MODULE_DEVICE_TABLE(of, jz4740_of_matches);
+static int jz4740_i2s_init_regmap_fields(struct device *dev,
+ struct jz4740_i2s *i2s)
+{
+ i2s->field_rx_fifo_thresh =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->soc_info->field_rx_fifo_thresh);
+ if (IS_ERR(i2s->field_rx_fifo_thresh))
+ return PTR_ERR(i2s->field_rx_fifo_thresh);
+
+ i2s->field_tx_fifo_thresh =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->soc_info->field_tx_fifo_thresh);
+ if (IS_ERR(i2s->field_tx_fifo_thresh))
+ return PTR_ERR(i2s->field_tx_fifo_thresh);
+
+ i2s->field_i2sdiv_capture =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->soc_info->field_i2sdiv_capture);
+ if (IS_ERR(i2s->field_i2sdiv_capture))
+ return PTR_ERR(i2s->field_i2sdiv_capture);
+
+ i2s->field_i2sdiv_playback =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->soc_info->field_i2sdiv_playback);
+ if (IS_ERR(i2s->field_i2sdiv_playback))
+ return PTR_ERR(i2s->field_i2sdiv_playback);
+
+ return 0;
+}
+
static const struct regmap_config jz4740_i2s_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
@@ -509,6 +549,10 @@ static int jz4740_i2s_dev_probe(struct
platform_device *pdev)
if (IS_ERR(i2s->regmap))
return PTR_ERR(i2s->regmap);
+ ret = jz4740_i2s_init_regmap_fields(dev, i2s);
+ if (ret)
+ return ret;
+
platform_set_drvdata(pdev, i2s);
ret = devm_snd_soc_register_component(dev, &jz4740_i2s_component,
--
2.35.1