linux-kernel - Re: [PATCH v4 2/3] pinctrl: scmi: add blocklist

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Date: Tue, 7 May 2024 14:14:33 -0500
From: Rob Herring <robh@...nel.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Dong Aisheng <aisheng.dong@....com>, Jacky Bai <ping.bai@....com>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
	linux-gpio@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH v4 2/3] pinctrl: scmi: add blocklist

On Sun, May 05, 2024 at 11:47:18AM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> i.MX95 will have its own pinctrl scmi driver, so need block
> pinctrl-scmi driver for i.MX95, otherwise there will be two pinctrl
> devices for a single scmi protocol@19.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/pinctrl/pinctrl-scmi.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/pinctrl/pinctrl-scmi.c b/drivers/pinctrl/pinctrl-scmi.c
> index 036bc1e3fc6c..331ca20ac68b 100644
> --- a/drivers/pinctrl/pinctrl-scmi.c
> +++ b/drivers/pinctrl/pinctrl-scmi.c
> @@ -11,6 +11,7 @@
>  #include <linux/errno.h>
>  #include <linux/module.h>
>  #include <linux/mod_devicetable.h>
> +#include <linux/of.h>
>  #include <linux/scmi_protocol.h>
>  #include <linux/slab.h>
>  #include <linux/types.h>
> @@ -504,6 +505,11 @@ static int pinctrl_scmi_get_pins(struct scmi_pinctrl *pmx,
>  	return 0;
>  }
>  
> +static const struct of_device_id scmi_pinctrl_blocklist[] = {
> +	{ .compatible = "fsl,imx95", },
> +	{ }
> +};
> +
>  static int scmi_pinctrl_probe(struct scmi_device *sdev)
>  {
>  	int ret;
> @@ -511,10 +517,14 @@ static int scmi_pinctrl_probe(struct scmi_device *sdev)
>  	struct scmi_pinctrl *pmx;
>  	const struct scmi_handle *handle;
>  	struct scmi_protocol_handle *ph;
> +	struct device_node *np __free(device_node) = of_find_node_by_path("/");
>  
>  	if (!sdev->handle)
>  		return -EINVAL;
>  
> +	if (of_match_node(scmi_pinctrl_blocklist, np))
> +		return -ENODEV;

Use of_machine_compatible_match() instead.

> +
>  	handle = sdev->handle;
>  
>  	pinctrl_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_PINCTRL, &ph);
> 
> -- 
> 2.37.1
>