From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/drivers/rtc/rtc-m41t80.c | 38 ++++++++++++++++----------------------
1 files changed, 16 insertions(+), 22 deletions(-)
diff --git a/kernel/drivers/rtc/rtc-m41t80.c b/kernel/drivers/rtc/rtc-m41t80.c
index 5808a1e..8a89bc5 100644
--- a/kernel/drivers/rtc/rtc-m41t80.c
+++ b/kernel/drivers/rtc/rtc-m41t80.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* I2C client/driver for the ST M41T80 family of i2c rtc chips.
*
@@ -6,11 +7,6 @@
* Based on m41t00.c by Mark A. Greer <mgreer@mvista.com>
*
* 2006 (c) mycable GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -217,7 +213,7 @@
sizeof(buf), buf);
if (err < 0) {
dev_err(&client->dev, "Unable to read date\n");
- return -EIO;
+ return err;
}
tm->tm_sec = bcd2bin(buf[M41T80_REG_SEC] & 0x7f);
@@ -238,9 +234,6 @@
struct m41t80_data *clientdata = i2c_get_clientdata(client);
unsigned char buf[8];
int err, flags;
-
- if (tm->tm_year < 100 || tm->tm_year > 199)
- return -EINVAL;
buf[M41T80_REG_SSEC] = 0;
buf[M41T80_REG_SEC] = bin2bcd(tm->tm_sec);
@@ -274,10 +267,11 @@
if (flags < 0)
return flags;
- if (i2c_smbus_write_byte_data(client, M41T80_REG_FLAGS,
- flags & ~M41T80_FLAGS_OF)) {
+ err = i2c_smbus_write_byte_data(client, M41T80_REG_FLAGS,
+ flags & ~M41T80_FLAGS_OF);
+ if (err < 0) {
dev_err(&client->dev, "Unable to write flags register\n");
- return -EIO;
+ return err;
}
return err;
@@ -287,10 +281,12 @@
{
struct i2c_client *client = to_i2c_client(dev);
struct m41t80_data *clientdata = i2c_get_clientdata(client);
- u8 reg;
+ int reg;
if (clientdata->features & M41T80_FEATURE_BL) {
reg = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS);
+ if (reg < 0)
+ return reg;
seq_printf(seq, "battery\t\t: %s\n",
(reg & M41T80_FLAGS_BATT_LOW) ? "exhausted" : "ok");
}
@@ -706,7 +702,6 @@
/**
* wdt_ioctl:
- * @inode: inode of the device
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
@@ -745,7 +740,7 @@
return -EINVAL;
wdt_margin = new_margin;
wdt_ping();
- /* Fall */
+ fallthrough;
case WDIOC_GETTIMEOUT:
return put_user(wdt_margin, (int __user *)arg);
@@ -799,7 +794,7 @@
*/
wdt_is_open = 1;
mutex_unlock(&m41t80_rtc_mutex);
- return nonseekable_open(inode, file);
+ return stream_open(inode, file);
}
return -ENODEV;
}
@@ -841,6 +836,7 @@
.owner = THIS_MODULE,
.read = wdt_read,
.unlocked_ioctl = wdt_unlocked_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
.write = wdt_write,
.open = wdt_open,
.release = wdt_release,
@@ -873,7 +869,7 @@
static int m41t80_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct i2c_adapter *adapter = client->adapter;
int rc = 0;
struct rtc_time tm;
struct m41t80_data *m41t80_data = NULL;
@@ -926,6 +922,8 @@
}
m41t80_data->rtc->ops = &m41t80_rtc_ops;
+ m41t80_data->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ m41t80_data->rtc->range_max = RTC_TIMESTAMP_END_2099;
if (client->irq <= 0) {
/* We cannot support UIE mode if we do not have an IRQ line */
@@ -939,11 +937,7 @@
if (m41t80_data->features & M41T80_FEATURE_HT) {
m41t80_rtc_read_time(&client->dev, &tm);
dev_info(&client->dev, "HT bit was set!\n");
- dev_info(&client->dev,
- "Power Down at %04i-%02i-%02i %02i:%02i:%02i\n",
- tm.tm_year + 1900,
- tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
- tm.tm_min, tm.tm_sec);
+ dev_info(&client->dev, "Power Down at %ptR\n", &tm);
}
rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_HOUR,
rc & ~M41T80_ALHOUR_HT);
--
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