linux-kernel - [PATCH] phy: ti: phy-j721e-wiz: stop name conflict if multiple serdes are initialized

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Date:   Fri, 9 Sep 2022 13:00:26 -0700
From:   Matt Ranostay <mranostay@...com>
To:     <linux-phy@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC:     <rogerq@...nel.org>, <vkoul@...nel.org>, <vigneshr@...com>,
        Matt Ranostay <mranostay@...com>
Subject: [PATCH] phy: ti: phy-j721e-wiz: stop name conflict if multiple serdes are initialized

When multiple serdes instances are initialized the first will succeed but
additional will conflict over clocks names and probing fails.

Signed-off-by: Matt Ranostay <mranostay@...com>
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
---
 drivers/phy/ti/phy-j721e-wiz.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index 20af142580ad..1f4f585a84ad 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -717,6 +717,8 @@ static int wiz_phy_en_refclk_register(struct wiz *wiz)
 	struct device *dev = wiz->dev;
 	struct clk_init_data *init;
 	struct clk *clk;
+	char *clk_name;
+	unsigned int sz;
 
 	wiz_phy_en_refclk = devm_kzalloc(dev, sizeof(*wiz_phy_en_refclk), GFP_KERNEL);
 	if (!wiz_phy_en_refclk)
@@ -726,12 +728,23 @@ static int wiz_phy_en_refclk_register(struct wiz *wiz)
 
 	init->ops = &wiz_phy_en_refclk_ops;
 	init->flags = 0;
-	init->name = output_clk_names[TI_WIZ_PHY_EN_REFCLK];
+
+	sz = strlen(dev_name(dev)) + strlen(output_clk_names[TI_WIZ_PHY_EN_REFCLK]) + 2;
+
+	clk_name = kzalloc(sz, GFP_KERNEL);
+	if (!clk_name)
+		return -ENOMEM;
+
+	snprintf(clk_name, sz, "%s_%s", dev_name(dev), output_clk_names[TI_WIZ_PHY_EN_REFCLK]);
+	init->name = clk_name;
 
 	wiz_phy_en_refclk->phy_en_refclk = wiz->phy_en_refclk;
 	wiz_phy_en_refclk->hw.init = init;
 
 	clk = devm_clk_register(dev, &wiz_phy_en_refclk->hw);
+
+	kfree(clk_name);
+
 	if (IS_ERR(clk))
 		return PTR_ERR(clk);
 
-- 
2.37.2