linux-kernel - Re: [PATCH v3 2/2] regulator: richtek,rt4801: parse GPIOs per regulator

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Date:   Mon, 25 Apr 2022 16:08:31 +0800
From:   ChiYuan Huang <u0084500@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        ChiYuan Huang <cy_huang@...htek.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/2] regulator: richtek,rt4801: parse GPIOs per
 regulator

On Mon, Apr 25, 2022 at 10:01:24AM +0200, Krzysztof Kozlowski wrote:
> On 25/04/2022 09:58, ChiYuan Huang wrote:
> >>  
> >> -	priv->enable_gpios = devm_gpiod_get_array_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH);
> >> -	if (IS_ERR(priv->enable_gpios)) {
> >> -		dev_err(&i2c->dev, "Failed to get gpios\n");
> >> -		return PTR_ERR(priv->enable_gpios);
> >> +	for (i = 0; i < DSV_OUT_MAX; i++) {
> >> +		priv->enable_gpios[i] = devm_gpiod_get_index_optional(&i2c->dev,
> >> +								      "enable",
> >> +								      i,
> >> +								      GPIOD_OUT_HIGH);
> >> +		if (IS_ERR(priv->enable_gpios[i])) {
> >> +			dev_err(&i2c->dev, "Failed to get gpios\n");
> >> +			return PTR_ERR(priv->enable_gpios[i]);
> >> +		}
> >>  	}
> > You can directly removed all about 'enable-gpios' in probe phase.
> > Just keep of_parse_cb to get per regulator 'enable' gpio. 
> 
> We cannot, it would break the ABI and make the change backwards
> incompatible.
> 

Almost forget the backward compatibility.

I'm testing it right now. After that I'll add 'Tested-by' tag.

Thanks.
> 
> Best regards,
> Krzysztof