add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mfd/htc-i2cpld.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  htc-i2cpld.c
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  *  Chip driver for an unknown CPLD chip found on omap850 HTC devices like
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@@ -9,25 +10,10 @@
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  *
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  *  Based on work done in the linwizard project
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  *  Copyright (C) 2008-2009 Angelo Arrifano <miknix@gmail.com>
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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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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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 #include <linux/kernel.h>
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 #include <linux/init.h>
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-#include <linux/module.h>
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 #include <linux/interrupt.h>
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 #include <linux/platform_device.h>
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 #include <linux/i2c.h>
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@@ -360,6 +346,7 @@
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 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
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 		dev_warn(dev, "i2c adapter %d non-functional\n",
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 			 pdata->i2c_adapter_id);
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+		i2c_put_adapter(adapter);
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 		return -EINVAL;
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 	}
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@@ -369,12 +356,13 @@
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 	info.platform_data = chip;
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 	/* Add the I2C device.  This calls the probe() function. */
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-	client = i2c_new_device(adapter, &info);
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-	if (!client) {
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+	client = i2c_new_client_device(adapter, &info);
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+	if (IS_ERR(client)) {
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 		/* I2C device registration failed, contineu with the next */
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 		dev_warn(dev, "Unable to add I2C device for 0x%x\n",
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 			 plat_chip_data->addr);
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-		return -ENODEV;
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+		i2c_put_adapter(adapter);
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+		return PTR_ERR(client);
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 	}
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 	i2c_set_clientdata(client, chip);
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@@ -399,8 +387,7 @@
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 	htcpld = platform_get_drvdata(pdev);
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 	chip = &htcpld->chip[chip_index];
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-	if (chip->client)
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-		i2c_unregister_device(chip->client);
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+	i2c_unregister_device(chip->client);
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 }
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 static int htcpld_register_chip_gpio(
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@@ -614,8 +601,6 @@
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 	{ "htcpld-chip", 0 },
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 	{ }
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 };
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-MODULE_DEVICE_TABLE(i2c, htcpld_chip_id);
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-
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 static struct i2c_driver htcpld_chip_driver = {
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 	.driver = {
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@@ -643,17 +628,4 @@
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 	/* Probe for our chips */
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 	return platform_driver_probe(&htcpld_core_driver, htcpld_core_probe);
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 }
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-
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-static void __exit htcpld_core_exit(void)
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-{
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-	i2c_del_driver(&htcpld_chip_driver);
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-	platform_driver_unregister(&htcpld_core_driver);
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-}
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-
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-module_init(htcpld_core_init);
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-module_exit(htcpld_core_exit);
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-
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-MODULE_AUTHOR("Cory Maccarrone <darkstar6262@gmail.com>");
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-MODULE_DESCRIPTION("I2C HTC PLD Driver");
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-MODULE_LICENSE("GPL");
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-
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+device_initcall(htcpld_core_init);