[01/27] rtc: ds1337: Add driver model support

From: Biwen Li <biwen.li at nxp.com>

Add support of driver model of ds1337

Signed-off-by: Biwen Li <biwen.li at nxp.com>
---
 drivers/rtc/ds1337.c | 127 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)

>-----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 01/27] rtc: ds1337: Add driver model support
>
>From: Biwen Li <biwen.li at nxp.com>
>
>Add support of driver model of ds1337
>
>Signed-off-by: Biwen Li <biwen.li at nxp.com>
>---
> drivers/rtc/ds1337.c | 127
>+++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 127 insertions(+)
>
>diff --git a/drivers/rtc/ds1337.c b/drivers/rtc/ds1337.c index
>9b31048e97..e12d368675 100644
>--- a/drivers/rtc/ds1337.c
>+++ b/drivers/rtc/ds1337.c
>@@ -1,6 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0+
> /*
>  * (C) Copyright 2001-2008
>+ * Copyright 2020 NXP
>  * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
>  * Keith Outwater, keith_outwater at mvis.com`
>  */
>@@ -12,6 +13,7 @@
>
> #include <common.h>
> #include <command.h>
>+#include <dm.h>
> #include <rtc.h>
> #include <i2c.h>
>
>@@ -60,6 +62,7 @@
> #define RTC_STAT_BIT_OSF	0x80	/* Oscillator stop flag		*/
>
>
>+#if !CONFIG_IS_ENABLED(DM_RTC)
> static uchar rtc_read (uchar reg);
> static void rtc_write (uchar reg, uchar val);
>
>@@ -188,3 +191,127 @@ static void rtc_write (uchar reg, uchar val)  {
> 	i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);  }
>+#else
>+static uchar rtc_read (struct udevice *dev, uchar reg) {
>+	return (dm_i2c_reg_read (dev, reg));
>+}
>+
>+static void rtc_write (struct udevice *dev, uchar reg, uchar val) {
>+	dm_i2c_reg_write (dev, reg, val);
>+}
>+
>+static int ds1337_rtc_get (struct udevice *dev, struct rtc_time *tmp) {
>+	int rel = 0;
>+	uchar sec, min, hour, mday, wday, mon_cent, year, control, status;
>+
>+	control = rtc_read (dev, RTC_CTL_REG_ADDR);
>+	status = rtc_read (dev, RTC_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_cent = rtc_read (dev, RTC_MON_REG_ADDR);
>+	year = rtc_read (dev, RTC_YR_REG_ADDR);
>+
>+	/* No century bit, assume year 2000 */ #ifdef CONFIG_RTC_DS1388
>+	mon_cent |= 0x80;
>+#endif
>+
>+	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x
>"
>+		"hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
>+		year, mon_cent, mday, wday, hour, min, sec, control, status);
>+
>+	if (status & RTC_STAT_BIT_OSF) {
>+		printf ("### Warning: RTC oscillator has stopped\n");
>+		/* clear the OSF flag */
>+		rtc_write (dev, RTC_STAT_REG_ADDR,
>+			   rtc_read (dev, RTC_STAT_REG_ADDR) &
>~RTC_STAT_BIT_OSF);
>+		rel = -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_cent & 0x1F);
>+	tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 2000 : 1900);
>+	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 rel;
>+}
>+
>+static int ds1337_rtc_set (struct udevice *dev, const struct rtc_time
>+*tmp) {
>+	uchar century;
>+
>+	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));
>+
>+	century = (tmp->tm_year >= 2000) ? 0x80 : 0;
>+	rtc_write (dev, RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon) |
>century);
>+
>+	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;
>+}
>+
>+#ifdef CONFIG_RTC_DS1337_NOOSC
>+ #define RTC_DS1337_RESET_VAL \
>+	(RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2) #else
>#define
>+RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2) #endif
>static
>+int ds1337_rtc_reset (struct udevice *dev) { #ifdef CONFIG_RTC_DS1337
>+	rtc_write (dev, RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL); #elif
>defined
>+CONFIG_RTC_DS1388
>+	rtc_write(dev, RTC_CTL_REG_ADDR, 0x0); /* hw default */ #endif
>#ifdef
>+CONFIG_RTC_DS1339_TCR_VAL
>+	rtc_write (dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
>#endif
>+#ifdef CONFIG_RTC_DS1388_TCR_VAL
>+	rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
>#endif
>+	return 0;
>+}
>+
>+static const struct rtc_ops ds1337_rtc_ops = {
>+	.get = ds1337_rtc_get,
>+	.set = ds1337_rtc_set,
>+	.reset = ds1337_rtc_reset,
>+};
>+
>+static const struct udevice_id ds1337_rtc_ids[] = {
>+	{ .compatible = "ds1337" },
>+	{ .compatible = "ds1338" },
>+	{ .compatible = "ds1338" },
>+	{ }
>+};
>+
>+U_BOOT_DRIVER(rtc_ds1337) = {
>+	.name   = "rtc-ds1337",
>+	.id     = UCLASS_RTC,
>+	.of_match = ds1337_rtc_ids,
>+	.ops    = &ds1337_rtc_ops,
>+};
>+#endif
>--
>2.17.1
Reviewed-by: Priyanka Jain <priyanka.jain at nxp.com>