linux-kernel - Re: [PATCH v2 2/3] ASoC: starfive: Add JH7110 PWM-DAC driver

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Date:   Thu, 3 Aug 2023 11:00:47 +0800
From:   Hal Feng <hal.feng@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Walker Chen <walker.chen@...rfivetech.com>,
        Xingyu Wu <xingyu.wu@...rfivetech.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>
CC:     <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] ASoC: starfive: Add JH7110 PWM-DAC driver

On Mon, 31 Jul 2023 09:06:10 +0200, Krzysztof Kozlowski wrote:
> On 31/07/2023 05:28, Hal Feng wrote:
>> Add PWM-DAC driver support for the StarFive JH7110 SoC.
>> 
> 
> 
> ...
> 
>> +static int jh7110_pwmdac_probe(struct platform_device *pdev)
>> +{
>> +	struct jh7110_pwmdac_dev *dev;
>> +	struct resource *res;
>> +	int ret;
>> +
>> +	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
>> +	if (!dev)
>> +		return -ENOMEM;
>> +
>> +	dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
>> +	if (IS_ERR(dev->base))
>> +		return PTR_ERR(dev->base);
>> +
>> +	dev->mapbase = res->start;
>> +
>> +	dev->clks[0].id = "apb";
>> +	dev->clks[1].id = "core";
>> +
>> +	ret = devm_clk_bulk_get(&pdev->dev, ARRAY_SIZE(dev->clks), dev->clks);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "failed to get pwmdac clocks\n");
> 
> return dev_err_probe

OK, will fix.

> 
>> +		return ret;
>> +	}
>> +
>> +	dev->rst_apb = devm_reset_control_get_exclusive(&pdev->dev, NULL);
>> +	if (IS_ERR(dev->rst_apb)) {
>> +		dev_err(&pdev->dev, "failed to get pwmdac apb reset\n");
>> +		return PTR_ERR(dev->rst_apb);
> 
> return dev_err_probe

Will fix.

> 
>> +	}
>> +
>> +	dev->dev = &pdev->dev;
>> +	dev->shift = PWMDAC_SHIFT_8;
>> +	dev->duty_cycle = PWMDAC_CYCLE_CENTER;
>> +	dev->cnt_n = PWMDAC_SAMPLE_CNT_1;
>> +	dev->data_change = NO_CHANGE;
>> +	dev->data_mode = INVERTER_DATA_MSB;
>> +	dev->data_shift = PWMDAC_DATA_LEFT_SHIFT_BIT_0;
>> +
>> +	dev_set_drvdata(&pdev->dev, dev);
>> +	ret = devm_snd_soc_register_component(&pdev->dev,
>> +					      &jh7110_pwmdac_component,
>> +					      &jh7110_pwmdac_dai, 1);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "failed to register dai\n");
>> +		return ret;
> 
> I guess here as well for consistency and shorter code even though
> EPROBE_DEFER does not happen really.
> 
> return dev_err_probe

Will fix.

> 
>> +	}
>> +
>> +	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "failed to register pcm\n");
>> +		return ret;
> 
> return dev_err_probe

Will fix. Thanks for your review.

Best regards,
Hal

> 
>> +	}
>> +