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rtc: pt7c4338: Add driver model support

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Add support of driver model of pt7c4338

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Biwen Li 2020-05-01 20:03:57 +08:00 committed by Priyanka Jain
parent 3bebb4f358
commit 22e0a84072
1 changed files with 100 additions and 0 deletions
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100
drivers/rtc/pt7c4338.c
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@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2010 Freescale Semiconductor, Inc.
* Copyright 2020 NXP
*
* Author: Priyanka Jain <Priyanka.Jain@freescale.com>
*/
@ -19,6 +20,7 @@
#include <common.h>
#include <command.h>
#include <dm.h>
#include <rtc.h>
#include <i2c.h>
@ -46,6 +48,7 @@
#define RTC_PT7C4338_RESET_VAL \
(RTC_CTL_STAT_BIT_RS0 | RTC_CTL_STAT_BIT_RS1 | RTC_CTL_STAT_BIT_OUT)
#if !CONFIG_IS_ENABLED(DM_RTC)
/****** Helper functions ****************************************/
static u8 rtc_read(u8 reg)
{
@ -125,3 +128,100 @@ void rtc_reset(void)
rtc_write(RTC_SEC_REG_ADDR, 0x00); /* clearing Clock Halt */
rtc_write(RTC_CTL_STAT_REG_ADDR, RTC_PT7C4338_RESET_VAL);
}
#else
static u8 rtc_read(struct udevice *dev, u8 reg)
{
return dm_i2c_reg_read(dev, reg);
}
static void rtc_write(struct udevice *dev, u8 reg, u8 val)
{
dm_i2c_reg_write(dev, reg, val);
}
static int pt7c4338_rtc_get(struct udevice *dev, struct rtc_time *tmp)
{
int ret = 0;
u8 sec, min, hour, mday, wday, mon, year, ctl_stat;
ctl_stat = rtc_read(dev, RTC_CTL_STAT_REG_ADDR);
sec = rtc_read(dev, RTC_SEC_REG_ADDR);
min = rtc_read(dev, RTC_MIN_REG_ADDR);
hour = rtc_read(dev, RTC_HR_REG_ADDR);
wday = rtc_read(dev, RTC_DAY_REG_ADDR);
mday = rtc_read(dev, RTC_DATE_REG_ADDR);
mon = rtc_read(dev, RTC_MON_REG_ADDR);
year = rtc_read(dev, RTC_YR_REG_ADDR);
debug("Get RTC year: %02x mon: %02x mday: %02x wday: %02x\n",
year, mon, mday, wday);
debug("hr: %02x min: %02x sec: %02x control_status: %02x\n",
hour, min, sec, ctl_stat);
if (ctl_stat & RTC_CTL_STAT_BIT_OSF) {
printf("### Warning: RTC oscillator has stopped\n");
/* clear the OSF flag */
rtc_write(dev, RTC_CTL_STAT_REG_ADDR,
rtc_read(dev,
RTC_CTL_STAT_REG_ADDR)
& ~RTC_CTL_STAT_BIT_OSF);
ret = -1;
}
tmp->tm_sec = bcd2bin(sec & 0x7F);
tmp->tm_min = bcd2bin(min & 0x7F);
tmp->tm_hour = bcd2bin(hour & 0x3F);
tmp->tm_mday = bcd2bin(mday & 0x3F);
tmp->tm_mon = bcd2bin(mon & 0x1F);
tmp->tm_year = bcd2bin(year) + 2000;
tmp->tm_wday = bcd2bin((wday - 1) & 0x07);
tmp->tm_yday = 0;
tmp->tm_isdst = 0;
debug("Get DATE: %4d-%02d-%02d [wday=%d] TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
return ret;
}
static int pt7c4338_rtc_set(struct udevice *dev, const struct rtc_time *tmp)
{
debug("Set DATE: %4d-%02d-%02d [wday=%d] TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
rtc_write(dev, RTC_YR_REG_ADDR, bin2bcd(tmp->tm_year % 100));
rtc_write(dev, RTC_MON_REG_ADDR, bin2bcd(tmp->tm_mon));
rtc_write(dev, RTC_DAY_REG_ADDR, bin2bcd(tmp->tm_wday + 1));
rtc_write(dev, RTC_DATE_REG_ADDR, bin2bcd(tmp->tm_mday));
rtc_write(dev, RTC_HR_REG_ADDR, bin2bcd(tmp->tm_hour));
rtc_write(dev, RTC_MIN_REG_ADDR, bin2bcd(tmp->tm_min));
rtc_write(dev, RTC_SEC_REG_ADDR, bin2bcd(tmp->tm_sec));
return 0;
}
static int pt7c4338_rtc_reset(struct udevice *dev)
{
rtc_write(dev, RTC_SEC_REG_ADDR, 0x00); /* clearing Clock Halt */
rtc_write(dev, RTC_CTL_STAT_REG_ADDR, RTC_PT7C4338_RESET_VAL);
return 0;
}
static const struct rtc_ops pt7c4338_rtc_ops = {
.get = pt7c4338_rtc_get,
.set = pt7c4338_rtc_set,
.reset = pt7c4338_rtc_reset,
};
static const struct udevice_id pt7c4338_rtc_ids[] = {
{ .compatible = "pericom,pt7c4338" },
{ }
};
U_BOOT_DRIVER(rtc_pt7c4338) = {
.name = "rtc-pt7c4338",
.id = UCLASS_RTC,
.of_match = pt7c4338_rtc_ids,
.ops = &pt7c4338_rtc_ops,
};
#endif