Re: [PATCH 03/11] ASoC: jz4740-i2s: Convert to regmap API
From: Paul Cercueil
Date: Wed Jul 06 2022 - 17:53:46 EST
Hi Aidan,
Le mer., juil. 6 2022 at 22:13:22 +0100, Aidan MacDonald
<aidanmacdonald.0x0@xxxxxxxxx> a écrit :
Using regmap for accessing the AIC registers makes the driver a
little easier to read, and later refactors can take advantage of
regmap APIs to further simplify the driver.
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@xxxxxxxxx>
---
sound/soc/jz4740/Kconfig | 1 +
sound/soc/jz4740/jz4740-i2s.c | 99
+++++++++++++++--------------------
2 files changed, 42 insertions(+), 58 deletions(-)
diff --git a/sound/soc/jz4740/Kconfig b/sound/soc/jz4740/Kconfig
index e72f826062e9..dd3b4507fbe6 100644
--- a/sound/soc/jz4740/Kconfig
+++ b/sound/soc/jz4740/Kconfig
@@ -3,6 +3,7 @@ config SND_JZ4740_SOC_I2S
tristate "SoC Audio (I2S protocol) for Ingenic JZ4740 SoC"
depends on MIPS || COMPILE_TEST
depends on HAS_IOMEM
+ select REGMAP_MMIO
select SND_SOC_GENERIC_DMAENGINE_PCM
help
Say Y if you want to use I2S protocol and I2S codec on Ingenic
JZ4740
diff --git a/sound/soc/jz4740/jz4740-i2s.c
b/sound/soc/jz4740/jz4740-i2s.c
index ecd8df70d39c..66a901f56392 100644
--- a/sound/soc/jz4740/jz4740-i2s.c
+++ b/sound/soc/jz4740/jz4740-i2s.c
@@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/clk.h>
@@ -94,7 +95,7 @@ struct i2s_soc_info {
struct jz4740_i2s {
struct resource *mem;
- void __iomem *base;
+ struct regmap *regmap;
struct clk *clk_aic;
struct clk *clk_i2s;
@@ -105,39 +106,24 @@ struct jz4740_i2s {
const struct i2s_soc_info *soc_info;
};
-static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s,
- unsigned int reg)
-{
- return readl(i2s->base + reg);
-}
-
-static inline void jz4740_i2s_write(const struct jz4740_i2s *i2s,
- unsigned int reg, uint32_t value)
-{
- writel(value, i2s->base + reg);
-}
-
static int jz4740_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- uint32_t conf, ctrl;
int ret;
if (snd_soc_dai_active(dai))
return 0;
- ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
- ctrl |= JZ_AIC_CTRL_FLUSH;
- jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
+ regmap_write_bits(i2s->regmap, JZ_REG_AIC_CTRL,
+ JZ_AIC_CTRL_FLUSH, JZ_AIC_CTRL_FLUSH);
I don't think you need regmap_write_bits() here, since there is no
cache to bypass. You could use regmap_update_bits(), or even better,
regmap_set_bits().
ret = clk_prepare_enable(i2s->clk_i2s);
if (ret)
return ret;
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
- conf |= JZ_AIC_CONF_ENABLE;
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF,
+ JZ_AIC_CONF_ENABLE, JZ_AIC_CONF_ENABLE);
Use regmap_set_bits() when you want to set all the bits of the mask.
return 0;
}
@@ -146,14 +132,12 @@ static void jz4740_i2s_shutdown(struct
snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- uint32_t conf;
if (snd_soc_dai_active(dai))
return;
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
- conf &= ~JZ_AIC_CONF_ENABLE;
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF,
+ JZ_AIC_CONF_ENABLE, 0);
Use regmap_clear_bits() when you want to clear all bits of the mask.
Otherwise, looks fairly good!
Cheers,
-Paul
clk_disable_unprepare(i2s->clk_i2s);
}
@@ -162,8 +146,6 @@ static int jz4740_i2s_trigger(struct
snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
-
- uint32_t ctrl;
uint32_t mask;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
@@ -171,38 +153,30 @@ static int jz4740_i2s_trigger(struct
snd_pcm_substream *substream, int cmd,
else
mask = JZ_AIC_CTRL_ENABLE_CAPTURE | JZ_AIC_CTRL_ENABLE_RX_DMA;
- ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
-
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- ctrl |= mask;
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CTRL, mask, mask);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- ctrl &= ~mask;
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CTRL, mask, 0);
break;
default:
return -EINVAL;
}
- jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
-
return 0;
}
static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int
fmt)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
-
- uint32_t format = 0;
- uint32_t conf;
-
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
-
- conf &= ~(JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER);
+ const unsigned int conf_mask = JZ_AIC_CONF_BIT_CLK_MASTER |
+ JZ_AIC_CONF_SYNC_CLK_MASTER;
+ unsigned int conf = 0, format = 0;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_BP_FP:
@@ -238,8 +212,8 @@ static int jz4740_i2s_set_fmt(struct snd_soc_dai
*dai, unsigned int fmt)
return -EINVAL;
}
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
- jz4740_i2s_write(i2s, JZ_REG_AIC_I2S_FMT, format);
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF, conf_mask, conf);
+ regmap_write(i2s->regmap, JZ_REG_AIC_I2S_FMT, format);
return 0;
}
@@ -252,9 +226,9 @@ static int jz4740_i2s_hw_params(struct
snd_pcm_substream *substream,
uint32_t ctrl, div_reg;
int div;
- ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
+ regmap_read(i2s->regmap, JZ_REG_AIC_CTRL, &ctrl);
+ regmap_read(i2s->regmap, JZ_REG_AIC_CLK_DIV, &div_reg);
- 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)) {
@@ -291,8 +265,8 @@ static int jz4740_i2s_hw_params(struct
snd_pcm_substream *substream,
}
}
- jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
- jz4740_i2s_write(i2s, JZ_REG_AIC_CLK_DIV, div_reg);
+ regmap_write(i2s->regmap, JZ_REG_AIC_CTRL, ctrl);
+ regmap_write(i2s->regmap, JZ_REG_AIC_CLK_DIV, div_reg);
return 0;
}
@@ -329,12 +303,10 @@ static int jz4740_i2s_set_sysclk(struct
snd_soc_dai *dai, int clk_id,
static int jz4740_i2s_suspend(struct snd_soc_component *component)
{
struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
- uint32_t conf;
if (snd_soc_component_active(component)) {
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
- conf &= ~JZ_AIC_CONF_ENABLE;
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF,
+ JZ_AIC_CONF_ENABLE, 0);
clk_disable_unprepare(i2s->clk_i2s);
}
@@ -347,7 +319,6 @@ static int jz4740_i2s_suspend(struct
snd_soc_component *component)
static int jz4740_i2s_resume(struct snd_soc_component *component)
{
struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
- uint32_t conf;
int ret;
ret = clk_prepare_enable(i2s->clk_aic);
@@ -361,9 +332,8 @@ static int jz4740_i2s_resume(struct
snd_soc_component *component)
return ret;
}
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
- conf |= JZ_AIC_CONF_ENABLE;
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
+ regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF,
+ JZ_AIC_CONF_ENABLE, JZ_AIC_CONF_ENABLE);
}
return 0;
@@ -396,8 +366,8 @@ static int jz4740_i2s_dai_probe(struct
snd_soc_dai *dai)
JZ_AIC_CONF_INTERNAL_CODEC;
}
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
+ regmap_write(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
+ regmap_write(i2s->regmap, JZ_REG_AIC_CONF, conf);
return 0;
}
@@ -495,11 +465,19 @@ static const struct of_device_id
jz4740_of_matches[] = {
};
MODULE_DEVICE_TABLE(of, jz4740_of_matches);
+static const struct regmap_config jz4740_i2s_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = JZ_REG_AIC_FIFO,
+};
+
static int jz4740_i2s_dev_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct jz4740_i2s *i2s;
struct resource *mem;
+ void __iomem *regs;
int ret;
i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
@@ -508,9 +486,9 @@ static int jz4740_i2s_dev_probe(struct
platform_device *pdev)
i2s->soc_info = device_get_match_data(dev);
- i2s->base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
- if (IS_ERR(i2s->base))
- return PTR_ERR(i2s->base);
+ regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
i2s->playback_dma_data.maxburst = 16;
i2s->playback_dma_data.addr = mem->start + JZ_REG_AIC_FIFO;
@@ -526,6 +504,11 @@ static int jz4740_i2s_dev_probe(struct
platform_device *pdev)
if (IS_ERR(i2s->clk_i2s))
return PTR_ERR(i2s->clk_i2s);
+ i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+ &jz4740_i2s_regmap_config);
+ if (IS_ERR(i2s->regmap))
+ return PTR_ERR(i2s->regmap);
+
platform_set_drvdata(pdev, i2s);
ret = devm_snd_soc_register_component(dev, &jz4740_i2s_component,
--
2.35.1