[PATCH 02/27] rtc: pt7c4338: Add driver model support

[Priyanka Jain (OSS)]

>-----Original Message-----
>From: U-Boot <u-boot-bounces at lists.denx.de> On Behalf Of Biwen Li
>Sent: Sunday, April 12, 2020 2:24 PM
>To: Jagdish Gediya <jagdish.gediya at nxp.com>; Priyanka Jain
><priyanka.jain at nxp.com>; hs at denx.de; jagan at amarulasolutions.com;
>aford173 at gmail.com; Alison Wang <alison.wang at nxp.com>;
>jh80.chung at samsung.com; Pramod Kumar <pramod.kumar_1 at nxp.com>;
>Rajesh Bhagat <rajesh.bhagat at nxp.com>; Ruchika Gupta
><ruchika.gupta at nxp.com>; olteanv at gmail.com
>Cc: Xiaobo Xie <xiaobo.xie at nxp.com>; Jiafei Pan <jiafei.pan at nxp.com>; u-
>boot at lists.denx.de; Z.q. Hou <zhiqiang.hou at nxp.com>; Biwen Li
><biwen.li at nxp.com>
>Subject: [PATCH 02/27] rtc: pt7c4338: Add driver model support
>
>From: Biwen Li <biwen.li at nxp.com>
>
>Add support of driver model of pt7c4338
>
>Signed-off-by: Biwen Li <biwen.li at nxp.com>
>---
> drivers/rtc/pt7c4338.c | 98
>++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 98 insertions(+)
>
>diff --git a/drivers/rtc/pt7c4338.c b/drivers/rtc/pt7c4338.c index
>6a19fe1d23..8f69bb00e3 100644
>--- a/drivers/rtc/pt7c4338.c
>+++ b/drivers/rtc/pt7c4338.c
>@@ -1,6 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0+
> /*
>  * Copyright 2010 Freescale Semiconductor, Inc.
>+ * Copyright 2020 NXP
>  *
>  * Author:	Priyanka Jain <Priyanka.Jain at 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 +128,98 @@ 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 "
>+		"hr: %02x min: %02x sec: %02x control_status: %02x\n",
>+		year, mon, mday, wday, 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
>--
>2.17.1
Reviewed-by: Priyanka Jain <priyanka.jain at nxp.com>