[PATCH v3 09/10] phy: qualcomm: m31-eusb2: Make clkref an optional resource

From: Wesley Cheng <wesley.cheng@oss.qualcomm.com>
To: krzk+dt@kernel.org, conor+dt@kernel.org,
	dmitry.baryshkov@oss.qualcomm.com, kishon@kernel.org,
	vkoul@kernel.org, gregkh@linuxfoundation.org, robh@kernel.org
Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
	devicetree@vger.kernel.org, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Wesley Cheng <wesley.cheng@oss.qualcomm.com>
Subject: [PATCH v3 09/10] phy: qualcomm: m31-eusb2: Make clkref an optional resource
Date: Wed, 24 Sep 2025 19:28:49 -0700	[thread overview]
Message-ID: <20250925022850.4133013-10-wesley.cheng@oss.qualcomm.com> (raw)
In-Reply-To: <20250925022850.4133013-1-wesley.cheng@oss.qualcomm.com>

Some USB subsystems that utlize the M31 eUSB2 PHY doesn't require a clkref.
One example is the Glymur platform, which contains 4 USB controllers that
all utilize the M31 eUSB2 PHY.  However, PHYs associated to the primary
and secondary controllers do not require a clkref resource.  Due to this,
mark this as an optional clock.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Wesley Cheng <wesley.cheng@oss.qualcomm.com>
---
 drivers/phy/qualcomm/phy-qcom-m31-eusb2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c b/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c
index 95cd3175926d..f8a00962f937 100644
--- a/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c
+++ b/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c
@@ -267,7 +267,7 @@ static int m31eusb2_phy_probe(struct platform_device *pdev)
 	if (IS_ERR(phy->reset))
 		return PTR_ERR(phy->reset);
 
-	phy->clk = devm_clk_get(dev, NULL);
+	phy->clk = devm_clk_get_optional(dev, NULL);
 	if (IS_ERR(phy->clk))
 		return dev_err_probe(dev, PTR_ERR(phy->clk),
 				     "failed to get clk\n");

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