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-pcf8563.c | 95 ++++++++++++++++-------------------------------
1 files changed, 33 insertions(+), 62 deletions(-)
diff --git a/kernel/drivers/rtc/rtc-pcf8563.c b/kernel/drivers/rtc/rtc-pcf8563.c
index 5092452..2dc30ea 100644
--- a/kernel/drivers/rtc/rtc-pcf8563.c
+++ b/kernel/drivers/rtc/rtc-pcf8563.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* An I2C driver for the Philips PCF8563 RTC
* Copyright 2005-06 Tower Technologies
@@ -8,10 +9,6 @@
* based on the other drivers in this same directory.
*
* http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf
- *
- * 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/clk-provider.h>
@@ -25,8 +22,8 @@
#define PCF8563_REG_ST1 0x00 /* status */
#define PCF8563_REG_ST2 0x01
-#define PCF8563_BIT_AIE (1 << 1)
-#define PCF8563_BIT_AF (1 << 3)
+#define PCF8563_BIT_AIE BIT(1)
+#define PCF8563_BIT_AF BIT(3)
#define PCF8563_BITS_ST2_N (7 << 5)
#define PCF8563_REG_SC 0x02 /* datetime */
@@ -79,7 +76,6 @@
* 1970...2069.
*/
int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
- int voltage_low; /* incicates if a low_voltage was detected */
struct i2c_client *client;
#ifdef CONFIG_COMMON_CLK
@@ -199,8 +195,9 @@
* In the routines that deal directly with the pcf8563 hardware, we use
* rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
*/
-static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
+ struct i2c_client *client = to_i2c_client(dev);
struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
unsigned char buf[9];
int err;
@@ -210,7 +207,6 @@
return err;
if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) {
- pcf8563->voltage_low = 1;
dev_err(&client->dev,
"low voltage detected, date/time is not reliable.\n");
return -EINVAL;
@@ -231,9 +227,7 @@
tm->tm_mday = bcd2bin(buf[PCF8563_REG_DM] & 0x3F);
tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
tm->tm_mon = bcd2bin(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
- tm->tm_year = bcd2bin(buf[PCF8563_REG_YR]);
- if (tm->tm_year < 70)
- tm->tm_year += 100; /* assume we are in 1970...2069 */
+ tm->tm_year = bcd2bin(buf[PCF8563_REG_YR]) + 100;
/* detect the polarity heuristically. see note above. */
pcf8563->c_polarity = (buf[PCF8563_REG_MO] & PCF8563_MO_C) ?
(tm->tm_year >= 100) : (tm->tm_year < 100);
@@ -247,8 +241,9 @@
return 0;
}
-static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
+static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
+ struct i2c_client *client = to_i2c_client(dev);
struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
unsigned char buf[9];
@@ -269,7 +264,7 @@
buf[PCF8563_REG_MO] = bin2bcd(tm->tm_mon + 1);
/* year and century */
- buf[PCF8563_REG_YR] = bin2bcd(tm->tm_year % 100);
+ buf[PCF8563_REG_YR] = bin2bcd(tm->tm_year - 100);
if (pcf8563->c_polarity ? (tm->tm_year >= 100) : (tm->tm_year < 100))
buf[PCF8563_REG_MO] |= PCF8563_MO_C;
@@ -279,52 +274,22 @@
9 - PCF8563_REG_SC, buf + PCF8563_REG_SC);
}
-#ifdef CONFIG_RTC_INTF_DEV
static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
- struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev));
- struct rtc_time tm;
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
switch (cmd) {
case RTC_VL_READ:
- if (pcf8563->voltage_low)
- dev_info(dev, "low voltage detected, date/time is not reliable.\n");
+ ret = i2c_smbus_read_byte_data(client, PCF8563_REG_SC);
+ if (ret < 0)
+ return ret;
- if (copy_to_user((void __user *)arg, &pcf8563->voltage_low,
- sizeof(int)))
- return -EFAULT;
- return 0;
- case RTC_VL_CLR:
- /*
- * Clear the VL bit in the seconds register in case
- * the time has not been set already (which would
- * have cleared it). This does not really matter
- * because of the cached voltage_low value but do it
- * anyway for consistency.
- */
- if (pcf8563_get_datetime(to_i2c_client(dev), &tm))
- pcf8563_set_datetime(to_i2c_client(dev), &tm);
-
- /* Clear the cached value. */
- pcf8563->voltage_low = 0;
-
- return 0;
+ return put_user(ret & PCF8563_SC_LV ? RTC_VL_DATA_INVALID : 0,
+ (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
}
-}
-#else
-#define pcf8563_rtc_ioctl NULL
-#endif
-
-static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
-{
- return pcf8563_get_datetime(to_i2c_client(dev), tm);
-}
-
-static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
- return pcf8563_set_datetime(to_i2c_client(dev), tm);
}
static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
@@ -403,7 +368,7 @@
#define clkout_hw_to_pcf8563(_hw) container_of(_hw, struct pcf8563, clkout_hw)
-static int clkout_rates[] = {
+static const int clkout_rates[] = {
32768,
1024,
32,
@@ -513,7 +478,7 @@
.set_rate = pcf8563_clkout_set_rate,
};
-static __maybe_unused struct clk *pcf8563_clkout_register_clk(struct pcf8563 *pcf8563)
+static struct clk *pcf8563_clkout_register_clk(struct pcf8563 *pcf8563)
{
struct i2c_client *client = pcf8563->client;
struct device_node *node = client->dev.of_node;
@@ -594,12 +559,16 @@
return err;
}
- pcf8563->rtc = devm_rtc_device_register(&client->dev,
- pcf8563_driver.driver.name,
- &pcf8563_rtc_ops, THIS_MODULE);
-
+ pcf8563->rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(pcf8563->rtc))
return PTR_ERR(pcf8563->rtc);
+
+ pcf8563->rtc->ops = &pcf8563_rtc_ops;
+ /* the pcf8563 alarm only supports a minute accuracy */
+ pcf8563->rtc->uie_unsupported = 1;
+ pcf8563->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ pcf8563->rtc->range_max = RTC_TIMESTAMP_END_2099;
+ pcf8563->rtc->set_start_time = true;
if (client->irq > 0) {
err = devm_request_threaded_irq(&client->dev, client->irq,
@@ -611,16 +580,16 @@
client->irq);
return err;
}
-
}
-#if defined(CONFIG_COMMON_CLK) && !defined(CONFIG_ROCKCHIP_THUNDER_BOOT)
+ err = rtc_register_device(pcf8563->rtc);
+ if (err)
+ return err;
+
+#ifdef CONFIG_COMMON_CLK
/* register clk in common clk framework */
pcf8563_clkout_register_clk(pcf8563);
#endif
-
- /* the pcf8563 alarm only supports a minute accuracy */
- pcf8563->rtc->uie_unsupported = 1;
return 0;
}
@@ -635,6 +604,8 @@
#ifdef CONFIG_OF
static const struct of_device_id pcf8563_of_match[] = {
{ .compatible = "nxp,pcf8563" },
+ { .compatible = "epson,rtc8564" },
+ { .compatible = "microcrystal,rv8564" },
{}
};
MODULE_DEVICE_TABLE(of, pcf8563_of_match);
--
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