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/nvmem.c | 43 ++++++++++++++++---------------------------
1 files changed, 16 insertions(+), 27 deletions(-)
diff --git a/kernel/drivers/rtc/nvmem.c b/kernel/drivers/rtc/nvmem.c
index 36ab183..4312096 100644
--- a/kernel/drivers/rtc/nvmem.c
+++ b/kernel/drivers/rtc/nvmem.c
@@ -1,17 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* RTC subsystem, nvmem interface
*
* Copyright (C) 2017 Alexandre Belloni
- *
- * 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/err.h>
#include <linux/types.h>
#include <linux/nvmem-consumer.h>
#include <linux/rtc.h>
+#include <linux/slab.h>
#include <linux/sysfs.h>
/*
@@ -25,11 +23,9 @@
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
- struct rtc_device *rtc = attr->private;
-
dev_warn_once(kobj_to_dev(kobj), nvram_warning);
- return nvmem_device_read(rtc->nvmem, off, count, buf);
+ return nvmem_device_read(attr->private, off, count, buf);
}
static ssize_t
@@ -37,26 +33,23 @@
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
- struct rtc_device *rtc = attr->private;
-
dev_warn_once(kobj_to_dev(kobj), nvram_warning);
- return nvmem_device_write(rtc->nvmem, off, count, buf);
+ return nvmem_device_write(attr->private, off, count, buf);
}
-static int rtc_nvram_register(struct rtc_device *rtc, size_t size)
+static int rtc_nvram_register(struct rtc_device *rtc,
+ struct nvmem_device *nvmem, size_t size)
{
int err;
- rtc->nvram = devm_kzalloc(rtc->dev.parent,
- sizeof(struct bin_attribute),
- GFP_KERNEL);
+ rtc->nvram = kzalloc(sizeof(*rtc->nvram), GFP_KERNEL);
if (!rtc->nvram)
return -ENOMEM;
rtc->nvram->attr.name = "nvram";
rtc->nvram->attr.mode = 0644;
- rtc->nvram->private = rtc;
+ rtc->nvram->private = nvmem;
sysfs_bin_attr_init(rtc->nvram);
@@ -67,7 +60,7 @@
err = sysfs_create_bin_file(&rtc->dev.parent->kobj,
rtc->nvram);
if (err) {
- devm_kfree(rtc->dev.parent, rtc->nvram);
+ kfree(rtc->nvram);
rtc->nvram = NULL;
}
@@ -77,6 +70,8 @@
static void rtc_nvram_unregister(struct rtc_device *rtc)
{
sysfs_remove_bin_file(&rtc->dev.parent->kobj, rtc->nvram);
+ kfree(rtc->nvram);
+ rtc->nvram = NULL;
}
/*
@@ -85,21 +80,20 @@
int rtc_nvmem_register(struct rtc_device *rtc,
struct nvmem_config *nvmem_config)
{
- if (!IS_ERR_OR_NULL(rtc->nvmem))
- return -EBUSY;
+ struct nvmem_device *nvmem;
if (!nvmem_config)
return -ENODEV;
nvmem_config->dev = rtc->dev.parent;
nvmem_config->owner = rtc->owner;
- rtc->nvmem = nvmem_register(nvmem_config);
- if (IS_ERR(rtc->nvmem))
- return PTR_ERR(rtc->nvmem);
+ nvmem = devm_nvmem_register(rtc->dev.parent, nvmem_config);
+ if (IS_ERR(nvmem))
+ return PTR_ERR(nvmem);
/* Register the old ABI */
if (rtc->nvram_old_abi)
- rtc_nvram_register(rtc, nvmem_config->size);
+ rtc_nvram_register(rtc, nvmem, nvmem_config->size);
return 0;
}
@@ -107,12 +101,7 @@
void rtc_nvmem_unregister(struct rtc_device *rtc)
{
- if (IS_ERR_OR_NULL(rtc->nvmem))
- return;
-
/* unregister the old ABI */
if (rtc->nvram)
rtc_nvram_unregister(rtc);
-
- nvmem_unregister(rtc->nvmem);
}
--
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