rtc: pt7c4338: Add driver model support

Add support of driver model of pt7c4338

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

diff --git a/drivers/rtc/pt7c4338.c b/drivers/rtc/pt7c4338.c
index 6a19fe1..5211d07 100644 (file)
--- 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@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