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-s3c.c | 135 ++++++++++++++------------------------------
1 files changed, 44 insertions(+), 91 deletions(-)
diff --git a/kernel/drivers/rtc/rtc-s3c.c b/kernel/drivers/rtc/rtc-s3c.c
index 58e03ac..24a4190 100644
--- a/kernel/drivers/rtc/rtc-s3c.c
+++ b/kernel/drivers/rtc/rtc-s3c.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* drivers/rtc/rtc-s3c.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
@@ -6,10 +7,6 @@
* Copyright (c) 2004,2006 Simtec Electronics
* Ben Dooks, <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
- *
- * 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.
*
* S3C2410/S3C2440/S3C24XX Internal RTC Driver
*/
@@ -26,6 +23,7 @@
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/uaccess.h>
#include <linux/io.h>
@@ -39,7 +37,7 @@
void __iomem *base;
struct clk *rtc_clk;
struct clk *rtc_src_clk;
- bool clk_disabled;
+ bool alarm_enabled;
const struct s3c_rtc_data *data;
@@ -47,7 +45,7 @@
int irq_tick;
spinlock_t pie_lock;
- spinlock_t alarm_clk_lock;
+ spinlock_t alarm_lock;
int ticnt_save;
int ticnt_en_save;
@@ -70,44 +68,27 @@
static int s3c_rtc_enable_clk(struct s3c_rtc *info)
{
- unsigned long irq_flags;
- int ret = 0;
+ int ret;
- spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
+ ret = clk_enable(info->rtc_clk);
+ if (ret)
+ return ret;
- if (info->clk_disabled) {
- ret = clk_enable(info->rtc_clk);
- if (ret)
- goto out;
-
- if (info->data->needs_src_clk) {
- ret = clk_enable(info->rtc_src_clk);
- if (ret) {
- clk_disable(info->rtc_clk);
- goto out;
- }
+ if (info->data->needs_src_clk) {
+ ret = clk_enable(info->rtc_src_clk);
+ if (ret) {
+ clk_disable(info->rtc_clk);
+ return ret;
}
- info->clk_disabled = false;
}
-
-out:
- spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
-
- return ret;
+ return 0;
}
static void s3c_rtc_disable_clk(struct s3c_rtc *info)
{
- unsigned long irq_flags;
-
- spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
- if (!info->clk_disabled) {
- if (info->data->needs_src_clk)
- clk_disable(info->rtc_src_clk);
- clk_disable(info->rtc_clk);
- info->clk_disabled = true;
- }
- spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
}
/* IRQ Handlers */
@@ -135,6 +116,7 @@
static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
{
struct s3c_rtc *info = dev_get_drvdata(dev);
+ unsigned long flags;
unsigned int tmp;
int ret;
@@ -151,17 +133,19 @@
writeb(tmp, info->base + S3C2410_RTCALM);
+ spin_lock_irqsave(&info->alarm_lock, flags);
+
+ if (info->alarm_enabled && !enabled)
+ s3c_rtc_disable_clk(info);
+ else if (!info->alarm_enabled && enabled)
+ ret = s3c_rtc_enable_clk(info);
+
+ info->alarm_enabled = enabled;
+ spin_unlock_irqrestore(&info->alarm_lock, flags);
+
s3c_rtc_disable_clk(info);
- if (enabled) {
- ret = s3c_rtc_enable_clk(info);
- if (ret)
- return ret;
- } else {
- s3c_rtc_disable_clk(info);
- }
-
- return 0;
+ return ret;
}
/* Set RTC frequency */
@@ -225,13 +209,9 @@
s3c_rtc_disable_clk(info);
rtc_tm->tm_year += 100;
-
- dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n",
- 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
- rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
-
rtc_tm->tm_mon -= 1;
+ dev_dbg(dev, "read time %ptR\n", rtc_tm);
return 0;
}
@@ -241,9 +221,7 @@
int year = tm->tm_year - 100;
int ret;
- dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
- 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
+ dev_dbg(dev, "set time %ptR\n", tm);
/* we get around y2k by simply not supporting it */
@@ -292,10 +270,7 @@
alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
- dev_dbg(dev, "read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
- alm_en,
- 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
- alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
+ dev_dbg(dev, "read alarm %d, %ptR\n", alm_en, alm_tm);
/* decode the alarm enable field */
if (alm_en & S3C2410_RTCALM_SECEN)
@@ -328,10 +303,7 @@
unsigned int alrm_en;
int ret;
- dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
- alrm->enabled,
- 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
+ dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm);
ret = s3c_rtc_enable_clk(info);
if (ret)
@@ -369,9 +341,9 @@
writeb(alrm_en, info->base + S3C2410_RTCALM);
- s3c_rtc_disable_clk(info);
-
s3c_rtc_setaie(dev, alrm->enabled);
+
+ s3c_rtc_disable_clk(info);
return 0;
}
@@ -468,21 +440,10 @@
return 0;
}
-static const struct of_device_id s3c_rtc_dt_match[];
-
-static const struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
-{
- const struct of_device_id *match;
-
- match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
- return match->data;
-}
-
static int s3c_rtc_probe(struct platform_device *pdev)
{
struct s3c_rtc *info = NULL;
struct rtc_time rtc_tm;
- struct resource *res;
int ret;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
@@ -491,34 +452,29 @@
/* find the IRQs */
info->irq_tick = platform_get_irq(pdev, 1);
- if (info->irq_tick < 0) {
- dev_err(&pdev->dev, "no irq for rtc tick\n");
+ if (info->irq_tick < 0)
return info->irq_tick;
- }
info->dev = &pdev->dev;
- info->data = s3c_rtc_get_data(pdev);
+ info->data = of_device_get_match_data(&pdev->dev);
if (!info->data) {
dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
return -EINVAL;
}
spin_lock_init(&info->pie_lock);
- spin_lock_init(&info->alarm_clk_lock);
+ spin_lock_init(&info->alarm_lock);
platform_set_drvdata(pdev, info);
info->irq_alarm = platform_get_irq(pdev, 0);
- if (info->irq_alarm < 0) {
- dev_err(&pdev->dev, "no irq for alarm\n");
+ if (info->irq_alarm < 0)
return info->irq_alarm;
- }
dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n",
info->irq_tick, info->irq_alarm);
/* get the memory region */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- info->base = devm_ioremap_resource(&pdev->dev, res);
+ info->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(info->base))
return PTR_ERR(info->base);
@@ -538,13 +494,8 @@
if (info->data->needs_src_clk) {
info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
if (IS_ERR(info->rtc_src_clk)) {
- ret = PTR_ERR(info->rtc_src_clk);
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev,
- "failed to find rtc source clock\n");
- else
- dev_dbg(&pdev->dev,
- "probe deferred due to missing rtc src clk\n");
+ ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk),
+ "failed to find rtc source clock\n");
goto err_src_clk;
}
ret = clk_prepare_enable(info->rtc_src_clk);
@@ -603,6 +554,8 @@
s3c_rtc_setfreq(info, 1);
+ s3c_rtc_disable_clk(info);
+
return 0;
err_nortc:
--
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