diff options
Diffstat (limited to 'drivers/rtc/rtc-max6900.c')
| -rw-r--r-- | drivers/rtc/rtc-max6900.c | 49 |
1 files changed, 13 insertions, 36 deletions
diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c index 55969b1b771a..7be31fce5bc7 100644 --- a/drivers/rtc/rtc-max6900.c +++ b/drivers/rtc/rtc-max6900.c @@ -1,14 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * rtc class driver for the Maxim MAX6900 chip * + * Copyright (c) 2007 MontaVista, Software, Inc. + * * Author: Dale Farnsworth <dale@farnsworth.org> * * based on previously existing rtc class drivers - * - * 2007 (c) MontaVista, Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. */ #include <linux/module.h> @@ -17,8 +15,6 @@ #include <linux/rtc.h> #include <linux/delay.h> -#define DRV_VERSION "0.2" - /* * register indices */ @@ -141,8 +137,9 @@ static int max6900_i2c_write_regs(struct i2c_client *client, u8 const *buf) return -EIO; } -static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm) +static int max6900_rtc_read_time(struct device *dev, struct rtc_time *tm) { + struct i2c_client *client = to_i2c_client(dev); int rc; u8 regs[MAX6900_REG_LEN]; @@ -159,24 +156,17 @@ static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm) bcd2bin(regs[MAX6900_REG_CENTURY]) * 100 - 1900; tm->tm_wday = bcd2bin(regs[MAX6900_REG_DW]); - return rtc_valid_tm(tm); + return 0; } static int max6900_i2c_clear_write_protect(struct i2c_client *client) { - int rc; - rc = i2c_smbus_write_byte_data(client, MAX6900_REG_CONTROL_WRITE, 0); - if (rc < 0) { - dev_err(&client->dev, "%s: control register write failed\n", - __func__); - return -EIO; - } - return 0; + return i2c_smbus_write_byte_data(client, MAX6900_REG_CONTROL_WRITE, 0); } -static int -max6900_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm) +static int max6900_rtc_set_time(struct device *dev, struct rtc_time *tm) { + struct i2c_client *client = to_i2c_client(dev); u8 regs[MAX6900_REG_LEN]; int rc; @@ -202,31 +192,18 @@ max6900_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm) return 0; } -static int max6900_rtc_read_time(struct device *dev, struct rtc_time *tm) -{ - return max6900_i2c_read_time(to_i2c_client(dev), tm); -} - -static int max6900_rtc_set_time(struct device *dev, struct rtc_time *tm) -{ - return max6900_i2c_set_time(to_i2c_client(dev), tm); -} - static const struct rtc_class_ops max6900_rtc_ops = { .read_time = max6900_rtc_read_time, .set_time = max6900_rtc_set_time, }; -static int -max6900_probe(struct i2c_client *client, const struct i2c_device_id *id) +static int max6900_probe(struct i2c_client *client) { struct rtc_device *rtc; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -ENODEV; - dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); - rtc = devm_rtc_device_register(&client->dev, max6900_driver.driver.name, &max6900_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) @@ -237,10 +214,11 @@ max6900_probe(struct i2c_client *client, const struct i2c_device_id *id) return 0; } -static struct i2c_device_id max6900_id[] = { - { "max6900", 0 }, +static const struct i2c_device_id max6900_id[] = { + { "max6900" }, { } }; +MODULE_DEVICE_TABLE(i2c, max6900_id); static struct i2c_driver max6900_driver = { .driver = { @@ -255,4 +233,3 @@ module_i2c_driver(max6900_driver); MODULE_DESCRIPTION("Maxim MAX6900 RTC driver"); MODULE_AUTHOR("Dale Farnsworth <dale@farnsworth.org>"); MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); |