linux-kernel - [PATCH] phy: can-transceiver: Drop unnecessary "mux-states" property presence check

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Message-ID: <20250203185421.3383805-2-robh@kernel.org>
Date: Mon,  3 Feb 2025 12:54:21 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Marc Kleine-Budde <mkl@...gutronix.de>,
	Vincent Mailhol <mailhol.vincent@...adoo.fr>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>
Cc: linux-can@...r.kernel.org,
	linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] phy: can-transceiver: Drop unnecessary "mux-states" property presence check

It doesn't matter whether "mux-states" is not present or there is some
other issue parsing it causing an error. Drop the presence check and
rework the error handling to ignore anything other than deferred probe.

Acked-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
Now a warning in v6.14-rc1, so please apply for 6.14.

v2:
 - Use brackets on else clause
---
 drivers/phy/phy-can-transceiver.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c
index ee4ce4249698..2bec70615449 100644
--- a/drivers/phy/phy-can-transceiver.c
+++ b/drivers/phy/phy-can-transceiver.c
@@ -103,6 +103,7 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
 	struct phy *phy;
 	struct gpio_desc *standby_gpio;
 	struct gpio_desc *enable_gpio;
+	struct mux_state *mux_state;
 	u32 max_bitrate = 0;
 	int err;
 
@@ -113,13 +114,11 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
 	match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node);
 	drvdata = match->data;
 
-	if (of_property_read_bool(dev->of_node, "mux-states")) {
-		struct mux_state *mux_state;
-
-		mux_state = devm_mux_state_get(dev, NULL);
-		if (IS_ERR(mux_state))
-			return dev_err_probe(&pdev->dev, PTR_ERR(mux_state),
-					     "failed to get mux\n");
+	mux_state = devm_mux_state_get(dev, NULL);
+	if (IS_ERR(mux_state)) {
+		if (PTR_ERR(mux_state) == -EPROBE_DEFER)
+			return PTR_ERR(mux_state);
+	} else {
 		can_transceiver_phy->mux_state = mux_state;
 	}
 
-- 
2.47.2