linux-kernel - Re: [PATCH 2/4] reset: eyeq5: add driver

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Message-ID: <6dd6690e-8344-49c2-b389-66562a94114a@linaro.org>
Date: Tue, 19 Dec 2023 08:41:42 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Théo Lebrun <theo.lebrun@...tlin.com>,
 Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>,
 Gregory CLEMENT <gregory.clement@...tlin.com>,
 Philipp Zabel <p.zabel@...gutronix.de>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-mips@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, Tawfik Bayouk <tawfik.bayouk@...ileye.com>
Subject: Re: [PATCH 2/4] reset: eyeq5: add driver

On 18/12/2023 18:16, Théo Lebrun wrote:
> Add the Mobileye EyeQ5 reset controller driver. See the header comment
> for more information on how it works. This driver is specific to this
> platform; it might grow to add later support of other platforms from
> Mobileye.
> 
> Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
> ---


...

> +static int eq5r_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct device_node *np = dev->of_node;
> +	struct device_node *parent_np = of_get_parent(np);
> +	struct eq5r_private *priv;
> +	int ret, i;
> +
> +	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	dev_set_drvdata(dev, priv);
> +
> +	priv->olb = ERR_PTR(-ENODEV);
> +	if (parent_np)
> +		priv->olb = syscon_node_to_regmap(parent_np);
> +	if (IS_ERR(priv->olb))
> +		priv->olb = syscon_regmap_lookup_by_phandle(np, "mobileye,olb");
> +	if (IS_ERR(priv->olb))
> +		return PTR_ERR(priv->olb);

NAK for such code. In all of your patches. This is part of the OLB, as
you explained before, and cannot be anything else.

> +
> +	for (i = 0; i < EQ5R_DOMAIN_COUNT; i++)
> +		mutex_init(&priv->mutexes[i]);
> +
> +	priv->rcdev.ops = &eq5r_ops;
> +	priv->rcdev.owner = THIS_MODULE;
> +	priv->rcdev.dev = dev;
> +	priv->rcdev.of_node = np;
> +	priv->rcdev.of_reset_n_cells = 2;
> +	priv->rcdev.of_xlate = eq5r_of_xlate;
> +
> +	priv->rcdev.nr_resets = 0;
> +	for (i = 0; i < EQ5R_DOMAIN_COUNT; i++)
> +		priv->rcdev.nr_resets += __builtin_popcount(eq5r_valid_masks[i]);
> +
> +	ret = reset_controller_register(&priv->rcdev);
> +	if (ret) {
> +		dev_err(dev, "Failed registering reset controller: %d\n", ret);
> +		return ret;
> +	}
> +
> +	dev_info(dev, "probed\n");

Drop


Best regards,
Krzysztof