change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/drivers/char/hw_random/st-rng.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * ST Random Number Generator Driver ST's Platforms
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  *
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@@ -5,16 +6,13 @@
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  *         Lee Jones <lee.jones@linaro.org>
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  *
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  * Copyright (C) 2015 STMicroelectronics (R&D) Limited
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/clk.h>
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 #include <linux/delay.h>
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 #include <linux/hw_random.h>
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 #include <linux/io.h>
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+#include <linux/kernel.h>
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 #include <linux/module.h>
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 #include <linux/of.h>
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 #include <linux/platform_device.h>
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@@ -44,7 +42,6 @@
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 struct st_rng_data {
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 	void __iomem	*base;
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-	struct clk	*clk;
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 	struct hwrng	ops;
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 };
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@@ -75,7 +72,6 @@
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 static int st_rng_probe(struct platform_device *pdev)
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 {
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 	struct st_rng_data *ddata;
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-	struct resource *res;
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 	struct clk *clk;
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 	void __iomem *base;
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 	int ret;
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@@ -84,31 +80,22 @@
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 	if (!ddata)
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 		return -ENOMEM;
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	base = devm_ioremap_resource(&pdev->dev, res);
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+	base = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(base))
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 		return PTR_ERR(base);
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-	clk = devm_clk_get(&pdev->dev, NULL);
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+	clk = devm_clk_get_enabled(&pdev->dev, NULL);
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 	if (IS_ERR(clk))
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 		return PTR_ERR(clk);
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-
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-	ret = clk_prepare_enable(clk);
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-	if (ret)
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-		return ret;
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 	ddata->ops.priv	= (unsigned long)ddata;
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 	ddata->ops.read	= st_rng_read;
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 	ddata->ops.name	= pdev->name;
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 	ddata->base	= base;
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-	ddata->clk	= clk;
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-	dev_set_drvdata(&pdev->dev, ddata);
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-
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-	ret = hwrng_register(&ddata->ops);
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+	ret = devm_hwrng_register(&pdev->dev, &ddata->ops);
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 	if (ret) {
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 		dev_err(&pdev->dev, "Failed to register HW RNG\n");
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-		clk_disable_unprepare(clk);
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 		return ret;
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 	}
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@@ -117,18 +104,7 @@
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 	return 0;
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 }
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-static int st_rng_remove(struct platform_device *pdev)
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-{
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-	struct st_rng_data *ddata = dev_get_drvdata(&pdev->dev);
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-
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-	hwrng_unregister(&ddata->ops);
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-
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-	clk_disable_unprepare(ddata->clk);
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-
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-	return 0;
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-}
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-
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-static const struct of_device_id st_rng_match[] = {
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+static const struct of_device_id st_rng_match[] __maybe_unused = {
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 	{ .compatible = "st,rng" },
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 	{},
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 };
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@@ -140,7 +116,6 @@
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 		.of_match_table = of_match_ptr(st_rng_match),
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 	},
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 	.probe = st_rng_probe,
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-	.remove = st_rng_remove
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 };
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 module_platform_driver(st_rng_driver);