console:/ $
console:/ $ time
console:/ $ date
console:/ $ hwclock -r
1|console:/ $
1|console:/ $ su
console:/ # hw
hw/ hwclock hwservicemanager
console:/ # hwclock -r
2025-08-20 09:25:07+0000
console:/ #
130|console:/ # date -s "2025-08-27 19:11:00"
Wed Aug 27 19:11:00 CST 2025
console:/ #
console:/ # hwclock -r
2025-08-20 09:26:21+0000
console:/ # hwclock -w
console:/ # hwclock -r
2025-08-27 11:11:25+0000
console:/ #
20250827在荣品RD-RK3588-MID开发板的Android13下确认RTL芯片hym8563
2025/8/27 14:52
1、相关驱动文件：
Z:\RD-RK3588_Android13\kernel-5.10\drivers\rtc\rtc-hym8563.c
Z:\rk-android13-20250818RD-RK3588-MID\kernel-5.10\drivers\rtc\rtc-hym8563.c
Z:\RD-RK3588_Android13\kernel-5.10\drivers\rtc\Kconfig
config RTC_DRV_HYM8563
tristate "Haoyu Microelectronics HYM8563"
depends on OF
help
Say Y to enable support for the HYM8563 I2C RTC chip. Apart
from the usual rtc functions it provides a clock output of
up to 32kHz.
This driver can also be built as a module. If so, the module
will be called rtc-hym8563.
Z:\RD-RK3588_Android13\kernel-5.10\drivers\rtc\Makefile
obj-$(CONFIG_RTC_DRV_GOLDFISH) += rtc-goldfish.o
obj-(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o obj-(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o
obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o
Z:\RD-RK3588_Android13\kernel-5.10\arch\arm64\configs\rockchip_defconfig
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_HYM8563=y
CONFIG_RTC_DRV_RK808=y
RK3568 RTC驱动实验
https://blog.csdn.net/qq_44647100/article/details/137227570
Linux第107步_Linux之PCF8563实验
https://blog.csdn.net/weixin_42550185/article/details/145658675
console:/ console:/ dmesg | grep 8563
15.749157\] \[ T1\] rtc-hym8563 4-0051: rtc information is invalid \[ 15.755871\] \[ T1\] rtc-hym8563 4-0051: registered as rtc0 \[ 15.756884\] \[ T1\] rtc-hym8563 4-0051: setting system clock to 2021-01-01T12:00:00 UTC (1609502400) console:/ $  console:/ $ console:/ $ time 0m00.09s user 0m00.12s system console:/ $ console:/ $ date Wed Aug 20 16:43:06 CST 2025 console:/ $ console:/ $ date -s "2025-08-27 16:41:00" date: cannot set date: Operation not permitted Wed Aug 27 16:41:00 CST 2025 1\|console:/ $ 1\|console:/ $ date Wed Aug 20 16:43:38 CST 2025 console:/ $ console:/ $ hwclock \[ 777.834080\]\[ T251\] type=1400 audit(1755679442.703:411): avc: denied { execute } for comm="sh" name="toybox_vendor" dev="dm-3" ino=268 scontext=u:r:shell:s0 tcontext=u:object_r:vendor_toolbox_exec:s0 tclass=file permissive=1 \^C 130\|console:/ $ 130\|console:/ $ hwclock -w hwclock: /dev/rtc0: Permission denied 1\|console:/ $ 1\|console:/ $ su console:/ # console:/ # hwclock -w console:/ # console:/ # hwclock -r 2025-08-20 08:44:45+0000 console:/ # console:/ $ console:/ $ date Wed Aug 20 17:23:46 CST 2025 console:/ $ console:/ $ time 0m00.02s user 0m00.01s system console:/ $ console:/ $ console:/ $ time 0m00.02s user 0m00.01s system console:/ $ console:/ $ date Wed Aug 20 17:24:10 CST 2025 console:/ $ console:/ $ hwclock -r hwclock: /dev/rtc0: Permission denied 1\|console:/ $ 1\|console:/ $ su console:/ # hw hw/ hwclock hwservicemanager console:/ # hwclock -r 2025-08-20 09:25:07+0000 console:/ # 130\|console:/ # date -s "2025-08-27 19:11:00" Wed Aug 27 19:11:00 CST 2025 console:/ # console:/ # hwclock -r 2025-08-20 09:26:21+0000 console:/ # hwclock -w console:/ # console:/ # hwclock -w console:/ # hwclock -r 2025-08-27 11:11:25+0000 console:/ # console:/ # hwclock -r 2025-08-27 11:11:28+0000 console:/ #   console:/ # console:/ # console:/ # i2cdetect -y 4 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- console:/ # console:/ # i2cdump -y 4 0x51 i2cdump: ioctl 703: Device or resource busy 1\|console:/ # 1\|console:/ #  参考资料： 百度：rk3588 hym8563 wakealarm 【有中断唤醒部分】 https://huaweicloud.csdn.net/64e5c3c5a3cccc782cc56331.html rk3568 android11 RTC hym8563调试 https://blog.csdn.net/weixin_74253011/article/details/146016652 RK3588V2--HYM8563TS RTC 实时时钟适配移植 https://www.cnblogs.com/yikoulinux/p/16736139.html Linux驱动\|rtc-hym8563移植笔记 【有Android层的改动】 一、 移植基于平台 soc : rk3568 board: EVB1-DDR4-V10 软 件：Android 11 Linux：4.19.232 https://blog.csdn.net/zg9uagfv/article/details/147782826?spm=1001.2101.3001.4242.1\&utm_medium=distribute.wap_relevant.none-task-blog-2\~default\~baidujs_baidulandingword\~default-0-147782826-blog-132163859.237%5Ev3%5Ewap_relevant_t0_download\&share_token=bc6626b4-65e0-4b5b-8c76-ee86fe99ba05 rk3568 android11上安装rtc-hym8563 https://blog.csdn.net/zg9uagfv/article/details/147782826 设置开机时间，如设置 120 秒后开机： #120秒后定时开机 echo +120 \> /sys/class/rtc/rtc0/wakealarm # 查看开机时间 cat /sys/class/rtc/rtc0/wakealarm #关机 reboot -p https://blog.csdn.net/qq_45063188/article/details/148586092?share_token=aa687d3c-1401-4182-8fa1-93a692b69d6f RK3568调试-外挂RTC芯片ISL1208 https://mp.weixin.qq.com/s/JbV9gKL8FRaknPZcI4fUOg RK3568 HDMI显示驱动调试记录 console:/sys/kernel/debug/dri/0 # cat summary Video Port0: ACTIVE Connector: HDMI-A-1 bus_format\[100a\]: RGB888_1X24 overlay_mode\[0\] output_mode\[f\] color_space\[0\], eotf:0 Display mode: 1920x1080p60 clk\[148500\] real_clk\[148500\] type\[40\] flag\[5
H: 1920 2008 2052 2200
V: 1080 1084 1089 1125
Esmart0-win0: ACTIVE
win_id: 8
format: AB24 little-endian (0x34324241) SDR[0] color_space[0] glb_alpha[0xff]
rotate: xmirror: 0 ymirror: 0 rotate_90: 0 rotate_270: 0
csc: y2r[0] r2y[0] csc mode[0]
zpos: 1
src: pos[0, 0] rect[1920 x 1080]
dst: pos[0, 0] rect[1920 x 1080]
buf[0]: addr: 0x00000000f0f76000 pitch: 7680 offset: 0
Cluster0-win0: ACTIVE
win_id: 0
format: AB24 little-endian (0x34324241)[AFBC] SDR[0] color_space[0] glb_alpha[0xff]
rotate: xmirror: 0 ymirror: 0 rotate_90: 1 rotate_270: 0
csc: y2r[0] r2y[0] csc mode[0]
zpos: 0
src: pos[276, 58] rect[728 x 1164]
dst: pos[0, 0] rect[1920 x 1080]
buf[0]: addr: 0x00000000f3ba4000 pitch: 5120 offset: 0
Video Port1: DISABLED
Video Port2: DISABLED
Video Port3: ACTIVE
Connector: DSI-1
bus_format[100a]: RGB888_1X24
overlay_mode[0] output_mode[0] color_space[0], eotf:0
Display mode: 1200x1920p60
clk[149000] real_clk[149000] type[48] flag[a]
H: 1200 1216 1226 1243
V: 1920 1954 1966 1998
Esmart3-win0: ACTIVE
win_id: 11
format: AB24 little-endian (0x34324241) SDR[0] color_space[0] glb_alpha[0xff]
rotate: xmirror: 0 ymirror: 0 rotate_90: 0 rotate_270: 0
csc: y2r[0] r2y[0] csc mode[0]
zpos: 2
src: pos[0, 0] rect[1200 x 1920]
dst: pos[0, 0] rect[1200 x 1920]
buf[0]: addr: 0x00000000f41fd000 pitch: 4800 offset: 0
Cluster3-win0: ACTIVE
win_id: 6
format: AB24 little-endian (0x34324241)[AFBC] SDR[0] color_space[0] glb_alpha[0xff]
rotate: xmirror: 0 ymirror: 0 rotate_90: 0 rotate_270: 0
csc: y2r[0] r2y[0] csc mode[0]
zpos: 0
src: pos[276, 58] rect[728 x 1164]
dst: pos[0, 0] rect[1200 x 1920]
buf[0]: addr: 0x00000000f3ba4000 pitch: 5120 offset: 0
Cluster3-win1: ACTIVE
win_id: 7
format: AB24 little-endian (0x34324241)[AFBC] SDR[0] color_space[0] glb_alpha[0xff]
rotate: xmirror: 0 ymirror: 0 rotate_90: 0 rotate_270: 0
csc: y2r[0] r2y[0] csc mode[0]
zpos: 1
src: pos[0, 0] rect[1200 x 1920]
dst: pos[0, 0] rect[1200 x 1920]
buf[0]: addr: 0x00000000f3292000 pitch: 4800 offset: 0
console:/sys/kernel/debug/dri/0 #
Z:\rk-android13-20250818RD-RK3588-MID\kernel-5.10\drivers\rtc\rtc-hym8563.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* Haoyu HYM8563 RTC driver
*
* Copyright (C) 2013 MundoReader S.L.
* Author: Heiko Stuebner <heiko@sntech.de>
*
* based on rtc-HYM8563
* Copyright (C) 2010 ROCKCHIP, Inc.
*/
#include <linux/module.h>
#include <linux/clk-provider.h>
#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/rtc.h>
#define HYM8563_CTL1 0x00
#define HYM8563_CTL1_TEST BIT(7)
#define HYM8563_CTL1_STOP BIT(5)
#define HYM8563_CTL1_TESTC BIT(3)
#define HYM8563_CTL2 0x01
#define HYM8563_CTL2_TI_TP BIT(4)
#define HYM8563_CTL2_AF BIT(3)
#define HYM8563_CTL2_TF BIT(2)
#define HYM8563_CTL2_AIE BIT(1)
#define HYM8563_CTL2_TIE BIT(0)
#define HYM8563_SEC 0x02
#define HYM8563_SEC_VL BIT(7)
#define HYM8563_SEC_MASK 0x7f
#define HYM8563_MIN 0x03
#define HYM8563_MIN_MASK 0x7f
#define HYM8563_HOUR 0x04
#define HYM8563_HOUR_MASK 0x3f
#define HYM8563_DAY 0x05
#define HYM8563_DAY_MASK 0x3f
#define HYM8563_WEEKDAY 0x06
#define HYM8563_WEEKDAY_MASK 0x07
#define HYM8563_MONTH 0x07
#define HYM8563_MONTH_CENTURY BIT(7)
#define HYM8563_MONTH_MASK 0x1f
#define HYM8563_YEAR 0x08
#define HYM8563_ALM_MIN 0x09
#define HYM8563_ALM_HOUR 0x0a
#define HYM8563_ALM_DAY 0x0b
#define HYM8563_ALM_WEEK 0x0c
/* Each alarm check can be disabled by setting this bit in the register */
#define HYM8563_ALM_BIT_DISABLE BIT(7)
#define HYM8563_CLKOUT 0x0d
#define HYM8563_CLKOUT_ENABLE BIT(7)
#define HYM8563_CLKOUT_32768 0
#define HYM8563_CLKOUT_1024 1
#define HYM8563_CLKOUT_32 2
#define HYM8563_CLKOUT_1 3
#define HYM8563_CLKOUT_MASK 3
#define HYM8563_TMR_CTL 0x0e
#define HYM8563_TMR_CTL_ENABLE BIT(7)
#define HYM8563_TMR_CTL_4096 0
#define HYM8563_TMR_CTL_64 1
#define HYM8563_TMR_CTL_1 2
#define HYM8563_TMR_CTL_1_60 3
#define HYM8563_TMR_CTL_MASK 3
#define HYM8563_TMR_CNT 0x0f
struct hym8563 {
struct i2c_client *client;
struct rtc_device *rtc;
#ifdef CONFIG_COMMON_CLK
struct clk_hw clkout_hw;
#endif
};
/*
* RTC handling
*/
static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct i2c_client *client = to_i2c_client(dev);
u8 buf[7];
int ret;
ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf);
if (ret < 0)
return ret;
tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK);
tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK);
tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK);
tm->tm_mday = bcd2bin(buf[3] & HYM8563_DAY_MASK);
tm->tm_wday = bcd2bin(buf[4] & HYM8563_WEEKDAY_MASK); /* 0 = Sun */
tm->tm_mon = bcd2bin(buf[5] & HYM8563_MONTH_MASK) - 1; /* 0 = Jan */
tm->tm_year = bcd2bin(buf[6]) + 100;
return 0;
}
static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct i2c_client *client = to_i2c_client(dev);
u8 buf[7];
int ret;
/* Years >= 2100 are to far in the future, 19XX is to early */
if (tm->tm_year < 100 || tm->tm_year >= 200)
return -EINVAL;
buf[0] = bin2bcd(tm->tm_sec);
buf[1] = bin2bcd(tm->tm_min);
buf[2] = bin2bcd(tm->tm_hour);
buf[3] = bin2bcd(tm->tm_mday);
buf[4] = bin2bcd(tm->tm_wday);
buf[5] = bin2bcd(tm->tm_mon + 1);
/*
* While the HYM8563 has a century flag in the month register,
* it does not seem to carry it over a subsequent write/read.
* So we'll limit ourself to 100 years, starting at 2000 for now.
*/
buf[6] = bin2bcd(tm->tm_year - 100);
/*
* CTL1 only contains TEST-mode bits apart from stop,
* so no need to read the value first
*/
ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1,
HYM8563_CTL1_STOP);
if (ret < 0)
return ret;
ret = i2c_smbus_write_i2c_block_data(client, HYM8563_SEC, 7, buf);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0);
if (ret < 0)
return ret;
return 0;
}
static int hym8563_rtc_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
struct i2c_client *client = to_i2c_client(dev);
int data;
data = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
if (data < 0)
return data;
if (enabled)
data |= HYM8563_CTL2_AIE;
else
data &= ~HYM8563_CTL2_AIE;
return i2c_smbus_write_byte_data(client, HYM8563_CTL2, data);
};
static int hym8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct i2c_client *client = to_i2c_client(dev);
struct rtc_time *alm_tm = &alm->time;
u8 buf[4];
int ret;
ret = i2c_smbus_read_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf);
if (ret < 0)
return ret;
/* The alarm only has a minute accuracy */
alm_tm->tm_sec = 0;
alm_tm->tm_min = (buf[0] & HYM8563_ALM_BIT_DISABLE) ?
-1 :
bcd2bin(buf[0] & HYM8563_MIN_MASK);
alm_tm->tm_hour = (buf[1] & HYM8563_ALM_BIT_DISABLE) ?
-1 :
bcd2bin(buf[1] & HYM8563_HOUR_MASK);
alm_tm->tm_mday = (buf[2] & HYM8563_ALM_BIT_DISABLE) ?
-1 :
bcd2bin(buf[2] & HYM8563_DAY_MASK);
alm_tm->tm_wday = (buf[3] & HYM8563_ALM_BIT_DISABLE) ?
-1 :
bcd2bin(buf[3] & HYM8563_WEEKDAY_MASK);
ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
if (ret < 0)
return ret;
if (ret & HYM8563_CTL2_AIE)
alm->enabled = 1;
return 0;
}
static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct i2c_client *client = to_i2c_client(dev);
struct rtc_time *alm_tm = &alm->time;
u8 buf[4];
int ret;
/*
* The alarm has no seconds so deal with it
*/
if (alm_tm->tm_sec) {
alm_tm->tm_sec = 0;
alm_tm->tm_min++;
if (alm_tm->tm_min >= 60) {
alm_tm->tm_min = 0;
alm_tm->tm_hour++;
if (alm_tm->tm_hour >= 24) {
alm_tm->tm_hour = 0;
alm_tm->tm_mday++;
alm_tm->tm_wday++;
if (alm_tm->tm_wday > 6)
alm_tm->tm_wday = 0;
switch (alm_tm->tm_mon + 1) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
if (alm_tm->tm_mday > 31)
alm_tm->tm_mday = 1;
break;
case 4:
case 6:
case 9:
case 11:
if (alm_tm->tm_mday > 30)
alm_tm->tm_mday = 1;
break;
case 2:
if (alm_tm->tm_year / 4 == 0) {
if (alm_tm->tm_mday > 29)
alm_tm->tm_mday = 1;
} else if (alm_tm->tm_mday > 28) {
alm_tm->tm_mday = 1;
}
break;
}
}
}
}
ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
if (ret < 0)
return ret;
ret &= ~HYM8563_CTL2_AIE;
ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret);
if (ret < 0)
return ret;
buf[0] = (alm_tm->tm_min < 60 && alm_tm->tm_min >= 0) ?
bin2bcd(alm_tm->tm_min) : HYM8563_ALM_BIT_DISABLE;
buf[1] = (alm_tm->tm_hour < 24 && alm_tm->tm_hour >= 0) ?
bin2bcd(alm_tm->tm_hour) : HYM8563_ALM_BIT_DISABLE;
buf[2] = (alm_tm->tm_mday <= 31 && alm_tm->tm_mday >= 1) ?
bin2bcd(alm_tm->tm_mday) : HYM8563_ALM_BIT_DISABLE;
buf[3] = (alm_tm->tm_wday < 7 && alm_tm->tm_wday >= 0) ?
bin2bcd(alm_tm->tm_wday) : HYM8563_ALM_BIT_DISABLE;
ret = i2c_smbus_write_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf);
if (ret < 0)
return ret;
return hym8563_rtc_alarm_irq_enable(dev, alm->enabled);
}
static const struct rtc_class_ops hym8563_rtc_ops = {
.read_time = hym8563_rtc_read_time,
.set_time = hym8563_rtc_set_time,
.alarm_irq_enable = hym8563_rtc_alarm_irq_enable,
.read_alarm = hym8563_rtc_read_alarm,
.set_alarm = hym8563_rtc_set_alarm,
};
/*
* Handling of the clkout
*/
#ifdef CONFIG_COMMON_CLK
#define clkout_hw_to_hym8563(_hw) container_of(_hw, struct hym8563, clkout_hw)
static int clkout_rates[] = {
32768,
1024,
32,
1,
};
static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
struct i2c_client *client = hym8563->client;
int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
if (ret < 0)
return 0;
ret &= HYM8563_CLKOUT_MASK;
return clkout_rates[ret];
}
static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
int i;
for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
if (clkout_rates[i] <= rate)
return clkout_rates[i];
return 0;
}
static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
struct i2c_client *client = hym8563->client;
int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
int i;
if (ret < 0)
return ret;
for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
if (clkout_rates[i] == rate) {
ret &= ~HYM8563_CLKOUT_MASK;
ret |= i;
return i2c_smbus_write_byte_data(client,
HYM8563_CLKOUT, ret);
}
return -EINVAL;
}
static int hym8563_clkout_control(struct clk_hw *hw, bool enable)
{
struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
struct i2c_client *client = hym8563->client;
int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
if (ret < 0)
return ret;
if (enable)
ret |= HYM8563_CLKOUT_ENABLE;
else
ret &= ~HYM8563_CLKOUT_ENABLE;
return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret);
}
static int hym8563_clkout_prepare(struct clk_hw *hw)
{
return hym8563_clkout_control(hw, 1);
}
static void hym8563_clkout_unprepare(struct clk_hw *hw)
{
hym8563_clkout_control(hw, 0);
}
static int hym8563_clkout_is_prepared(struct clk_hw *hw)
{
struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
struct i2c_client *client = hym8563->client;
int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
if (ret < 0)
return ret;
return !!(ret & HYM8563_CLKOUT_ENABLE);
}
static const struct clk_ops hym8563_clkout_ops = {
.prepare = hym8563_clkout_prepare,
.unprepare = hym8563_clkout_unprepare,
.is_prepared = hym8563_clkout_is_prepared,
.recalc_rate = hym8563_clkout_recalc_rate,
.round_rate = hym8563_clkout_round_rate,
.set_rate = hym8563_clkout_set_rate,
};
static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563)
{
struct i2c_client *client = hym8563->client;
struct device_node *node = client->dev.of_node;
struct clk *clk;
struct clk_init_data init;
init.name = "hym8563-clkout";
init.ops = &hym8563_clkout_ops;
init.flags = CLK_IS_CRITICAL;
init.parent_names = NULL;
init.num_parents = 0;
hym8563->clkout_hw.init = &init;
/* optional override of the clockname */
of_property_read_string(node, "clock-output-names", &init.name);
/* register the clock */
clk = clk_register(&client->dev, &hym8563->clkout_hw);
if (!IS_ERR(clk))
of_clk_add_provider(node, of_clk_src_simple_get, clk);
return clk;
}
#endif
/*
* The alarm interrupt is implemented as a level-low interrupt in the
* hym8563, while the timer interrupt uses a falling edge.
* We don't use the timer at all, so the interrupt is requested to
* use the level-low trigger.
*/
static irqreturn_t hym8563_irq(int irq, void *dev_id)
{
struct hym8563 *hym8563 = (struct hym8563 *)dev_id;
struct i2c_client *client = hym8563->client;
struct mutex *lock = &hym8563->rtc->ops_lock;
int data, ret;
mutex_lock(lock);
/* Clear the alarm flag */
data = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
if (data < 0) {
dev_err(&client->dev, "%s: error reading i2c data %d\n",
func, data);
goto out;
}
data &= ~HYM8563_CTL2_AF;
ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, data);
if (ret < 0) {
dev_err(&client->dev, "%s: error writing i2c data %d\n",
func, ret);
}
out:
mutex_unlock(lock);
return IRQ_HANDLED;
}
static int hym8563_init_device(struct i2c_client *client)
{
int ret;
/* Clear stop flag if present */
ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0);
if (ret < 0)
return ret;
ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
if (ret < 0)
return ret;
/* Disable alarm and timer interrupts */
ret &= ~HYM8563_CTL2_AIE;
ret &= ~HYM8563_CTL2_TIE;
/* Clear any pending alarm and timer flags */
if (ret & HYM8563_CTL2_AF)
ret &= ~HYM8563_CTL2_AF;
if (ret & HYM8563_CTL2_TF)
ret &= ~HYM8563_CTL2_TF;
ret &= ~HYM8563_CTL2_TI_TP;
return i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret);
}
#ifdef CONFIG_PM_SLEEP
static int hym8563_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
int ret;
if (device_may_wakeup(dev)) {
ret = enable_irq_wake(client->irq);
if (ret) {
dev_err(dev, "enable_irq_wake failed, %d\n", ret);
return ret;
}
}
return 0;
}
static int hym8563_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
if (device_may_wakeup(dev))
disable_irq_wake(client->irq);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume);
static int hym8563_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct hym8563 *hym8563;
int ret;
/*
* hym8563 initial time(2021_1_1_12:00:00),
* avoid hym8563 read time error
*/
struct rtc_time tm_read, tm = {
.tm_wday = 0,
.tm_year = 121,
.tm_mon = 0,
.tm_mday = 1,
.tm_hour = 12,
.tm_min = 0,
.tm_sec = 0,
};
hym8563 = devm_kzalloc(&client->dev, sizeof(*hym8563), GFP_KERNEL);
if (!hym8563)
return -ENOMEM;
hym8563->client = client;
i2c_set_clientdata(client, hym8563);
ret = hym8563_init_device(client);
if (ret) {
dev_err(&client->dev, "could not init device, %d\n", ret);
return ret;
}
if (client->irq > 0) {
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, hym8563_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, hym8563);
if (ret < 0) {
dev_err(&client->dev, "irq %d request failed, %d\n",
client->irq, ret);
return ret;
}
}
if (client->irq > 0 ||
device_property_read_bool(&client->dev, "wakeup-source")) {
device_init_wakeup(&client->dev, true);
}
/* check state of calendar information */
ret = i2c_smbus_read_byte_data(client, HYM8563_SEC);
if (ret < 0)
return ret;
dev_info(&client->dev, "rtc information is %s\n",
(ret & HYM8563_SEC_VL) ? "invalid" : "valid");
hym8563_rtc_read_time(&client->dev, &tm_read);
if ((ret & HYM8563_SEC_VL) || (tm_read.tm_year < 70) || (tm_read.tm_year > 200) ||
(tm_read.tm_mon == -1) || (rtc_valid_tm(&tm_read) != 0))
hym8563_rtc_set_time(&client->dev, &tm);
hym8563->rtc = devm_rtc_device_register(&client->dev, client->name,
&hym8563_rtc_ops, THIS_MODULE);
if (IS_ERR(hym8563->rtc))
return PTR_ERR(hym8563->rtc);
/* the hym8563 alarm only supports a minute accuracy */
hym8563->rtc->uie_unsupported = 1;
#ifdef CONFIG_COMMON_CLK
hym8563_clkout_register_clk(hym8563);
#endif
// rpdzkj: first use maybe disable irq
hym8563_rtc_alarm_irq_enable(&client->dev, 0);
return 0;
}
static const struct i2c_device_id hym8563_id[] = {
{ "hym8563", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, hym8563_id);
static const struct of_device_id hym8563_dt_idtable[] = {
{ .compatible = "haoyu,hym8563" },
{},
};
MODULE_DEVICE_TABLE(of, hym8563_dt_idtable);
static struct i2c_driver hym8563_driver = {
.driver = {
.name = "rtc-hym8563",
.pm = &hym8563_pm_ops,
.of_match_table = hym8563_dt_idtable,
},
.probe = hym8563_probe,
.id_table = hym8563_id,
};
module_i2c_driver(hym8563_driver);
MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
MODULE_DESCRIPTION("HYM8563 RTC driver");
MODULE_LICENSE("GPL");