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-pcf8523.c | 32 ++++++++++----------------------
1 files changed, 10 insertions(+), 22 deletions(-)
diff --git a/kernel/drivers/rtc/rtc-pcf8523.c b/kernel/drivers/rtc/rtc-pcf8523.c
index 2e03021..57d351d 100644
--- a/kernel/drivers/rtc/rtc-pcf8523.c
+++ b/kernel/drivers/rtc/rtc-pcf8523.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Avionic Design 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.
*/
#include <linux/bcd.h>
@@ -37,10 +34,6 @@
#define REG_OFFSET 0x0e
#define REG_OFFSET_MODE BIT(7)
-
-struct pcf8523 {
- struct rtc_device *rtc;
-};
static int pcf8523_read(struct i2c_client *client, u8 reg, u8 *valuep)
{
@@ -115,7 +108,7 @@
default:
dev_warn(&client->dev, "Unknown quartz-load-femtofarads value: %d. Assuming 12500",
load);
- /* fall through */
+ fallthrough;
case 12500:
value |= REG_CONTROL1_CAP_SEL;
break;
@@ -289,11 +282,11 @@
ret = pcf8523_voltage_low(client);
if (ret < 0)
return ret;
+ if (ret)
+ ret = RTC_VL_BACKUP_LOW;
- if (copy_to_user((void __user *)arg, &ret, sizeof(int)))
- return -EFAULT;
+ return put_user(ret, (unsigned int __user *)arg);
- return 0;
default:
return -ENOIOCTLCMD;
}
@@ -348,15 +341,11 @@
static int pcf8523_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct pcf8523 *pcf;
+ struct rtc_device *rtc;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
-
- pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
- if (!pcf)
- return -ENOMEM;
err = pcf8523_load_capacitance(client);
if (err < 0)
@@ -367,12 +356,10 @@
if (err < 0)
return err;
- pcf->rtc = devm_rtc_device_register(&client->dev, DRIVER_NAME,
+ rtc = devm_rtc_device_register(&client->dev, DRIVER_NAME,
&pcf8523_rtc_ops, THIS_MODULE);
- if (IS_ERR(pcf->rtc))
- return PTR_ERR(pcf->rtc);
-
- i2c_set_clientdata(client, pcf);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
return 0;
}
@@ -386,6 +373,7 @@
#ifdef CONFIG_OF
static const struct of_device_id pcf8523_of_match[] = {
{ .compatible = "nxp,pcf8523" },
+ { .compatible = "microcrystal,rv8523" },
{ }
};
MODULE_DEVICE_TABLE(of, pcf8523_of_match);
--
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