linux-kernel - Re: [PATCH v6 02/14] crypto: caam

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Message-ID: <VI1PR0402MB3485E4DDB5E3BDCBC2AAAFE398C70@VI1PR0402MB3485.eurprd04.prod.outlook.com>
Date:   Tue, 23 Jul 2019 14:17:23 +0000
From:   Horia Geanta <horia.geanta@....com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
CC:     Leonard Crestez <leonard.crestez@....com>,
        Iuliana Prodan <iuliana.prodan@....com>,
        Chris Spencer <christopher.spencer@....co.uk>,
        Cory Tusar <cory.tusar@....aero>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Aymen Sghaier <aymen.sghaier@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 02/14] crypto: caam - simplfy clock initialization

On 7/17/2019 6:25 PM, Andrey Smirnov wrote:
> Simplify clock initialization code by converting it to use clk-bulk,
> devres and soc_device_match() match table. No functional change
> intended.
> 
Thanks.
Two nitpicks below.

> +static int init_clocks(struct device *dev,
> +		       struct caam_drv_private *ctrlpriv,
> +		       const struct caam_imx_data *data)
> +{
> +	int ret;
> +
> +	ctrlpriv->num_clks = data->num_clks;
> +	ctrlpriv->clks = devm_kmemdup(dev, data->clks,
> +				      data->num_clks * sizeof(data->clks[0]),
> +				      GFP_KERNEL);
> +	if (!ctrlpriv->clks)
> +		return -ENOMEM;
> +
> +	ret = devm_clk_bulk_get(dev, ctrlpriv->num_clks, ctrlpriv->clks);
> +	if (ret) {
> +		dev_err(dev,
> +			"Failed to request all necessary clocks\n");
> +		return ret;
> +	}
> +
> +	ret = clk_bulk_prepare_enable(ctrlpriv->num_clks, ctrlpriv->clks);
> +	if (ret) {
> +		dev_err(dev,
> +			"Failed to prepare/enable all necessary clocks\n");
> +		return ret;
> +	}
> +
> +	ret = devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);
> +	if (ret)
> +		return ret;
> +
> +	return 0;
Or directly:
	return devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);

> +	imx_soc_match = soc_device_match(caam_imx_soc_table);
> +	if (imx_soc_match) {
> +		if (!imx_soc_match->data) {
> +			dev_err(dev, "No clock data provided for i.MX SoC");
> +			return -EINVAL;
[...]
> +		ret = init_clocks(dev, ctrlpriv, imx_soc_match->data);
ctrlpriv can be retrieved using dev_get_drvdata(dev), thus there's no need
to pass it as parameter.

Horia