Re: [PATCH V1 1/5] ASoC: codecs: Add i2c and codec registration for aw88261 and their associated operation functions

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 17/07/2023 13:58, wangweidong.a@awinic.com wrote:
> From: Weidong Wang <wangweidong.a@awinic.com>
> 
> The AW88261 is an I2S/TDM input, high efficiency
> digital Smart K audio amplifier with an integrated 10.25V
> smart boost convert
> 

...

> +
> +static int aw88261_request_firmware_file(struct aw88261 *aw88261)
> +{
> +	const struct firmware *cont = NULL;
> +	int ret;
> +
> +	aw88261->aw_pa->fw_status = AW88261_DEV_FW_FAILED;
> +
> +	ret = request_firmware(&cont, AW88261_ACF_FILE, aw88261->aw_pa->dev);
> +	if ((ret < 0) || (!cont)) {
> +		dev_err(aw88261->aw_pa->dev, "load [%s] failed!", AW88261_ACF_FILE);
> +		return ret;

return dev_err_probe?

> +	}
> +
> +	dev_info(aw88261->aw_pa->dev, "loaded %s - size: %zu\n",
> +			AW88261_ACF_FILE, cont ? cont->size : 0);> +
> +	aw88261->aw_cfg = devm_kzalloc(aw88261->aw_pa->dev, cont->size + sizeof(int), GFP_KERNEL);
> +	if (!aw88261->aw_cfg) {
> +		release_firmware(cont);
> +		return -ENOMEM;
> +	}
> +	aw88261->aw_cfg->len = (int)cont->size;
> +	memcpy(aw88261->aw_cfg->data, cont->data, cont->size);
> +	release_firmware(cont);
> +
> +	ret = aw88261_dev_load_acf_check(aw88261->aw_pa, aw88261->aw_cfg);
> +	if (ret < 0) {
> +		dev_err(aw88261->aw_pa->dev, "Load [%s] failed ....!", AW88261_ACF_FILE);
> +		return ret;
> +	}
> +
> +	dev_dbg(aw88261->aw_pa->dev, "%s : bin load success\n", __func__);

Drop dev_dbg on simple probe success/failure. There is tracing
infrastructure for this.

> +
> +	mutex_lock(&aw88261->lock);
> +	/* aw device init */
> +	ret = aw88261_dev_init(aw88261->aw_pa, aw88261->aw_cfg);
> +	if (ret < 0)
> +		dev_err(aw88261->aw_pa->dev, "dev init failed");
> +	mutex_unlock(&aw88261->lock);
> +
> +	return ret;
> +}
> +
> +static int aw88261_codec_probe(struct snd_soc_component *component)
> +{
> +	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
> +	struct aw88261 *aw88261 = snd_soc_component_get_drvdata(component);
> +	int ret;
> +
> +	INIT_DELAYED_WORK(&aw88261->start_work, aw88261_startup_work);
> +
> +	ret = aw88261_request_firmware_file(aw88261);
> +	if (ret < 0) {
> +		dev_err(aw88261->aw_pa->dev, "aw88261_request_firmware_file failed\n");
> +		return ret;

Consider here dev_err_probe, to annotate possibility of probe deferal
(e.g. missing rootfs). I think component probe is called for device probes?

> +	}
> +
> +	/* add widgets */
> +	ret = snd_soc_dapm_new_controls(dapm, aw88261_dapm_widgets,
> +							ARRAY_SIZE(aw88261_dapm_widgets));
> +	if (ret < 0)
> +		return ret;
> +
> +	/* add route */
> +	ret = snd_soc_dapm_add_routes(dapm, aw88261_audio_map,
> +							ARRAY_SIZE(aw88261_audio_map));
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = snd_soc_add_component_controls(component, aw88261_controls,
> +							ARRAY_SIZE(aw88261_controls));
> +
> +	return ret;
> +}
> +

> +static void aw88261_codec_remove(struct snd_soc_component *aw_codec)
> +{
> +	struct aw88261 *aw88261 = snd_soc_component_get_drvdata(aw_codec);
> +
> +	cancel_delayed_work_sync(&aw88261->start_work);
> +}
> +
> +
> +static void aw88261_hw_reset(struct aw88261 *aw88261)
> +{
> +	gpiod_set_value_cansleep(aw88261->reset_gpio, 0);
> +	usleep_range(AW88261_1000_US, AW88261_1000_US + 10);
> +	gpiod_set_value_cansleep(aw88261->reset_gpio, 1);
> +	usleep_range(AW88261_1000_US, AW88261_1000_US + 10);
> +}
> +
> +static int aw88261_i2c_probe(struct i2c_client *i2c)
> +{
> +	struct aw88261 *aw88261;
> +	int ret;
> +
> +	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C)) {
> +		dev_err(&i2c->dev, "check_functionality failed");
> +		return -EIO;
> +	}
> +
> +	aw88261 = aw88261_malloc_init(i2c);
> +	if (!aw88261) {
> +		dev_err(&i2c->dev, "malloc aw88261 failed");

Do not print messages on allocation errors.

Also, there is little sense in moving one or two functions - kzalloc -
to separate function. It does not make the code easier to read.

> +		return -ENOMEM;
> +	}
> +	i2c_set_clientdata(i2c, aw88261);
> +
> +	aw88261->reset_gpio = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(aw88261->reset_gpio))
> +		dev_info(&i2c->dev, "reset gpio not defined\n");
> +	else
> +		aw88261_hw_reset(aw88261);
> +
> +	aw88261->regmap = devm_regmap_init_i2c(i2c, &aw88261_remap_config);
> +	if (IS_ERR(aw88261->regmap)) {
> +		ret = PTR_ERR(aw88261->regmap);
> +		dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
> +		return ret;

return dev_err_probe

> +	}
> +
> +	/* aw pa init */
> +	ret = aw88261_init(&aw88261->aw_pa, i2c, aw88261->regmap);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = devm_snd_soc_register_component(&i2c->dev,
> +			&soc_codec_dev_aw88261,
> +			aw88261_dai, ARRAY_SIZE(aw88261_dai));
> +	if (ret < 0)
> +		dev_err(&i2c->dev, "failed to register aw88261: %d", ret);
> +
> +	return ret;
> +}
> +
> +#ifdef CONFIG_OF

Drop

> +static const struct of_device_id aw88261_of_match[] = {
> +	{ .compatible = "awinic,aw88261" },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, aw88261_of_match);
> +#endif
> +
> +static const struct i2c_device_id aw88261_i2c_id[] = {
> +	{ AW88261_I2C_NAME, 0 },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(i2c, aw88261_i2c_id);
> +
> +static struct i2c_driver aw88261_i2c_driver = {
> +	.driver = {
> +		.name = AW88261_I2C_NAME,
> +		.of_match_table = of_match_ptr(aw88261_of_match),

Drop of_match_ptr.


Best regards,
Krzysztof