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2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/nvmem/mxs-ocotp.c
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@@ -1,20 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Freescale MXS On-Chip OTP driver
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  *
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  * Copyright (C) 2015 Stefan Wahren <stefan.wahren@i2se.com>
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  *
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  * Based on the driver from Huang Shijie and Christoph G. Baumann
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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 as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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  */
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 #include <linux/clk.h>
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 #include <linux/delay.h>
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@@ -140,12 +130,16 @@
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 };
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 MODULE_DEVICE_TABLE(of, mxs_ocotp_match);
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+static void mxs_ocotp_action(void *data)
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+{
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+	clk_unprepare(data);
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+}
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+
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 static int mxs_ocotp_probe(struct platform_device *pdev)
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 {
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 	struct device *dev = &pdev->dev;
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 	const struct mxs_data *data;
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 	struct mxs_ocotp *otp;
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-	struct resource *res;
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 	const struct of_device_id *match;
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 	int ret;
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@@ -157,8 +151,7 @@
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 	if (!otp)
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 		return -ENOMEM;
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	otp->base = devm_ioremap_resource(dev, res);
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+	otp->base = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(otp->base))
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 		return PTR_ERR(otp->base);
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@@ -172,39 +165,26 @@
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 		return ret;
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 	}
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+	ret = devm_add_action_or_reset(&pdev->dev, mxs_ocotp_action, otp->clk);
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+	if (ret)
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+		return ret;
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+
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 	data = match->data;
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 	ocotp_config.size = data->size;
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 	ocotp_config.priv = otp;
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 	ocotp_config.dev = dev;
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-	otp->nvmem = nvmem_register(&ocotp_config);
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-	if (IS_ERR(otp->nvmem)) {
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-		ret = PTR_ERR(otp->nvmem);
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-		goto err_clk;
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-	}
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+	otp->nvmem = devm_nvmem_register(dev, &ocotp_config);
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+	if (IS_ERR(otp->nvmem))
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+		return PTR_ERR(otp->nvmem);
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 	platform_set_drvdata(pdev, otp);
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 	return 0;
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-
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-err_clk:
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-	clk_unprepare(otp->clk);
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-
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-	return ret;
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-}
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-
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-static int mxs_ocotp_remove(struct platform_device *pdev)
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-{
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-	struct mxs_ocotp *otp = platform_get_drvdata(pdev);
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-
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-	clk_unprepare(otp->clk);
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-
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-	return nvmem_unregister(otp->nvmem);
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 }
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 static struct platform_driver mxs_ocotp_driver = {
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 	.probe = mxs_ocotp_probe,
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-	.remove = mxs_ocotp_remove,
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 	.driver = {
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 		.name = "mxs-ocotp",
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 		.of_match_table = mxs_ocotp_match,
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@@ -212,6 +192,6 @@
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 };
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 module_platform_driver(mxs_ocotp_driver);
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-MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
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+MODULE_AUTHOR("Stefan Wahren <wahrenst@gmx.net");
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 MODULE_DESCRIPTION("driver for OCOTP in i.MX23/i.MX28");
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 MODULE_LICENSE("GPL v2");