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

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Date: Sun, 05 May 2024 11:47:18 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>, Rob Herring <robh@...nel.org>, 
 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>
Cc: 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: [PATCH v4 2/3] pinctrl: scmi: add blocklist

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

-- 
2.37.1