linux-kernel - [PATCH v1 2/3] i2c: mux: gpio: Don't dereference fwnode from struct device

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Message-Id: <20211115154201.46579-2-andriy.shevchenko@linux.intel.com>
Date:   Mon, 15 Nov 2021 17:42:00 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Evan Green <evgreen@...omium.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Peter Korsgaard <peter.korsgaard@...co.com>,
        Peter Rosin <peda@...ntia.se>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 2/3] i2c: mux: gpio: Don't dereference fwnode from struct device

We have a special helper to get fwnode out of struct device.
Moreover, dereferencing it directly prevents the fwnode
modifications in the future.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/i2c/muxes/i2c-mux-gpio.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
index 31e6eb1591bb..b09c10f36ddb 100644
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -53,6 +53,7 @@ static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,
 				 struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
 	struct device_node *np = dev->of_node;
 	struct device_node *adapter_np;
 	struct i2c_adapter *adapter = NULL;
@@ -60,7 +61,7 @@ static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,
 	unsigned *values;
 	int rc, i = 0;
 
-	if (is_of_node(dev->fwnode)) {
+	if (is_of_node(fwnode)) {
 		if (!np)
 			return -ENODEV;
 
@@ -72,7 +73,7 @@ static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,
 		adapter = of_find_i2c_adapter_by_node(adapter_np);
 		of_node_put(adapter_np);
 
-	} else if (is_acpi_node(dev->fwnode)) {
+	} else if (is_acpi_node(fwnode)) {
 		/*
 		 * In ACPI land the mux should be a direct child of the i2c
 		 * bus it muxes.
@@ -111,7 +112,7 @@ static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,
 	}
 	mux->data.values = values;
 
-	if (fwnode_property_read_u32(dev->fwnode, "idle-state", &mux->data.idle))
+	if (device_property_read_u32(dev, "idle-state", &mux->data.idle))
 		mux->data.idle = I2C_MUX_GPIO_NO_IDLE;
 
 	return 0;
-- 
2.33.0