[PATCH v4 08/22] ASoC: tegra20: spdif: Improve driver's code

Dmitry Osipenko
2021-12-04T14:39:44Z

- Clean up whitespaces, defines and variables.

- Remove obsolete code.

- Adhere to upstream coding style.

- Don't override returned error code.

- Replace pr_err with dev_err.

No functional changes are made by this patch. This is a minor code's
refactoring that will ease further maintenance of the driver.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
sound/soc/tegra/tegra20_spdif.c | 49 ++++++++++++---------------------
1 file changed, 18 insertions(+), 31 deletions(-)

diff --git a/sound/soc/tegra/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c
index 801784915004..d5c618611dbb 100644
--- a/sound/soc/tegra/tegra20_spdif.c
+++ b/sound/soc/tegra/tegra20_spdif.c
@@ -23,8 +23,6 @@

#include "tegra20_spdif.h"

-#define DRV_NAME "tegra20-spdif"
-
static __maybe_unused int tegra20_spdif_runtime_suspend(struct device *dev)
{
struct tegra20_spdif *spdif = dev_get_drvdata(dev);
@@ -49,11 +47,10 @@ static __maybe_unused int tegra20_spdif_runtime_resume(struct device *dev)
}

static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
{
- struct device *dev = dai->dev;
- struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);
+ struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);
unsigned int mask = 0, val = 0;
int ret, spdifclock;

@@ -106,7 +103,7 @@ static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream,

ret = clk_set_rate(spdif->clk_spdif_out, spdifclock);
if (ret) {
- dev_err(dev, "Can't set SPDIF clock rate: %d\n", ret);
+ dev_err(dai->dev, "Can't set SPDIF clock rate: %d\n", ret);
return ret;
}

@@ -127,9 +124,9 @@ static void tegra20_spdif_stop_playback(struct tegra20_spdif *spdif)
}

static int tegra20_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
+ struct snd_soc_dai *dai)
{
- struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);
+ struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);

switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
@@ -151,7 +148,7 @@ static int tegra20_spdif_trigger(struct snd_pcm_substream *substream, int cmd,

static int tegra20_spdif_probe(struct snd_soc_dai *dai)
{
- struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);
+ struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);

dai->capture_dma_data = NULL;
dai->playback_dma_data = &spdif->playback_dma_data;
@@ -160,26 +157,26 @@ static int tegra20_spdif_probe(struct snd_soc_dai *dai)
}

static const struct snd_soc_dai_ops tegra20_spdif_dai_ops = {
- .hw_params = tegra20_spdif_hw_params,
- .trigger = tegra20_spdif_trigger,
+ .hw_params = tegra20_spdif_hw_params,
+ .trigger = tegra20_spdif_trigger,
};

static struct snd_soc_dai_driver tegra20_spdif_dai = {
- .name = DRV_NAME,
+ .name = "tegra20-spdif",
.probe = tegra20_spdif_probe,
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
- SNDRV_PCM_RATE_48000,
+ SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &tegra20_spdif_dai_ops,
};

static const struct snd_soc_component_driver tegra20_spdif_component = {
- .name = DRV_NAME,
+ .name = "tegra20-spdif",
};

static bool tegra20_spdif_wr_rd_reg(struct device *dev, unsigned int reg)
@@ -260,7 +257,7 @@ static const struct regmap_config tegra20_spdif_regmap_config = {
static int tegra20_spdif_platform_probe(struct platform_device *pdev)
{
struct tegra20_spdif *spdif;
- struct resource *mem, *dmareq;
+ struct resource *mem;
void __iomem *regs;
int ret;

@@ -273,27 +270,19 @@ static int tegra20_spdif_platform_probe(struct platform_device *pdev)

spdif->clk_spdif_out = devm_clk_get(&pdev->dev, "out");
if (IS_ERR(spdif->clk_spdif_out)) {
- pr_err("Can't retrieve spdif clock\n");
- ret = PTR_ERR(spdif->clk_spdif_out);
- return ret;
+ dev_err(&pdev->dev, "Could not retrieve spdif clock\n");
+ return PTR_ERR(spdif->clk_spdif_out);
}

regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
if (IS_ERR(regs))
return PTR_ERR(regs);

- dmareq = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!dmareq) {
- dev_err(&pdev->dev, "No DMA resource\n");
- return -ENODEV;
- }
-
spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
- &tegra20_spdif_regmap_config);
+ &tegra20_spdif_regmap_config);
if (IS_ERR(spdif->regmap)) {
dev_err(&pdev->dev, "regmap init failed\n");
- ret = PTR_ERR(spdif->regmap);
- return ret;
+ return PTR_ERR(spdif->regmap);
}

spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT;
@@ -306,7 +295,6 @@ static int tegra20_spdif_platform_probe(struct platform_device *pdev)
&tegra20_spdif_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
- ret = -ENOMEM;
goto err_pm_disable;
}

@@ -349,14 +337,13 @@ MODULE_DEVICE_TABLE(of, tegra20_spdif_of_match);

static struct platform_driver tegra20_spdif_driver = {
.driver = {
- .name = DRV_NAME,
+ .name = "tegra20-spdif",
.pm = &tegra20_spdif_pm_ops,
.of_match_table = tegra20_spdif_of_match,
},
.probe = tegra20_spdif_platform_probe,
.remove = tegra20_spdif_platform_remove,
};
-
module_platform_driver(tegra20_spdif_driver);

MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
--
2.33.1