From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/drivers/rtc/rtc-davinci.c | 81 ++++++++--------------------------------
1 files changed, 16 insertions(+), 65 deletions(-)
diff --git a/kernel/drivers/rtc/rtc-davinci.c b/kernel/drivers/rtc/rtc-davinci.c
index caf3556..73f87a1 100644
--- a/kernel/drivers/rtc/rtc-davinci.c
+++ b/kernel/drivers/rtc/rtc-davinci.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* DaVinci Power Management and Real Time Clock Driver for TI platforms
*
* Copyright (C) 2009 Texas Instruments, Inc
*
* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/init.h>
@@ -240,7 +227,7 @@
return ret;
}
-static int convertfromdays(u16 days, struct rtc_time *tm)
+static void convertfromdays(u16 days, struct rtc_time *tm)
{
int tmp_days, year, mon;
@@ -263,24 +250,17 @@
break;
}
}
- return 0;
}
-static int convert2days(u16 *days, struct rtc_time *tm)
+static void convert2days(u16 *days, struct rtc_time *tm)
{
int i;
*days = 0;
-
- /* epoch == 1900 */
- if (tm->tm_year < 100 || tm->tm_year > 199)
- return -EINVAL;
for (i = 2000; i < 1900 + tm->tm_year; i++)
*days += rtc_year_days(1, 12, i);
*days += rtc_year_days(tm->tm_mday, tm->tm_mon, 1900 + tm->tm_year);
-
- return 0;
}
static int davinci_rtc_read_time(struct device *dev, struct rtc_time *tm)
@@ -313,8 +293,7 @@
days <<= 8;
days |= day0;
- if (convertfromdays(days, tm) < 0)
- return -EINVAL;
+ convertfromdays(days, tm);
return 0;
}
@@ -326,8 +305,7 @@
u8 rtc_cctrl;
unsigned long flags;
- if (convert2days(&days, tm) < 0)
- return -EINVAL;
+ convert2days(&days, tm);
spin_lock_irqsave(&davinci_rtc_lock, flags);
@@ -409,8 +387,7 @@
days <<= 8;
days |= day0;
- if (convertfromdays(days, &alm->time) < 0)
- return -EINVAL;
+ convertfromdays(days, &alm->time);
alm->pending = !!(rtcss_read(davinci_rtc,
PRTCSS_RTC_CCTRL) &
@@ -426,29 +403,7 @@
unsigned long flags;
u16 days;
- if (alm->time.tm_mday <= 0 && alm->time.tm_mon < 0
- && alm->time.tm_year < 0) {
- struct rtc_time tm;
- unsigned long now, then;
-
- davinci_rtc_read_time(dev, &tm);
- rtc_tm_to_time(&tm, &now);
-
- alm->time.tm_mday = tm.tm_mday;
- alm->time.tm_mon = tm.tm_mon;
- alm->time.tm_year = tm.tm_year;
- rtc_tm_to_time(&alm->time, &then);
-
- if (then < now) {
- rtc_time_to_tm(now + 24 * 60 * 60, &tm);
- alm->time.tm_mday = tm.tm_mday;
- alm->time.tm_mon = tm.tm_mon;
- alm->time.tm_year = tm.tm_year;
- }
- }
-
- if (convert2days(&days, &alm->time) < 0)
- return -EINVAL;
+ convert2days(&days, &alm->time);
spin_lock_irqsave(&davinci_rtc_lock, flags);
@@ -482,7 +437,6 @@
{
struct device *dev = &pdev->dev;
struct davinci_rtc *davinci_rtc;
- struct resource *res;
int ret = 0;
davinci_rtc = devm_kzalloc(&pdev->dev, sizeof(struct davinci_rtc), GFP_KERNEL);
@@ -490,25 +444,22 @@
return -ENOMEM;
davinci_rtc->irq = platform_get_irq(pdev, 0);
- if (davinci_rtc->irq < 0) {
- dev_err(dev, "no RTC irq\n");
+ if (davinci_rtc->irq < 0)
return davinci_rtc->irq;
- }
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- davinci_rtc->base = devm_ioremap_resource(dev, res);
+ davinci_rtc->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(davinci_rtc->base))
return PTR_ERR(davinci_rtc->base);
platform_set_drvdata(pdev, davinci_rtc);
- davinci_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
- &davinci_rtc_ops, THIS_MODULE);
- if (IS_ERR(davinci_rtc->rtc)) {
- dev_err(dev, "unable to register RTC device, err %d\n",
- ret);
+ davinci_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(davinci_rtc->rtc))
return PTR_ERR(davinci_rtc->rtc);
- }
+
+ davinci_rtc->rtc->ops = &davinci_rtc_ops;
+ davinci_rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ davinci_rtc->rtc->range_max = RTC_TIMESTAMP_BEGIN_2000 + (1 << 16) * 86400ULL - 1;
rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS, PRTCIF_INTFLG);
rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
@@ -533,7 +484,7 @@
device_init_wakeup(&pdev->dev, 0);
- return 0;
+ return rtc_register_device(davinci_rtc->rtc);
}
static int __exit davinci_rtc_remove(struct platform_device *pdev)
--
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