+// SPDX-License-Identifier: GPL-2.0+
/*
+ * (C) Copyright 2018
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de.
+ *
* (C) Copyright 2008
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* based on a the Linux rtc-m41t80.c driver which is:
* Alexander Bigga <ab@mycable.de>, 2006 (c) mycable GmbH
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
*/
/*
#include <common.h>
#include <command.h>
+#include <dm.h>
#include <rtc.h>
#include <i2c.h>
-#include <bcd.h>
-
-#if defined(CONFIG_CMD_DATE)
#define M41T62_REG_SSEC 0
#define M41T62_REG_SEC 1
#define M41T62_FEATURE_HT (1 << 0)
#define M41T62_FEATURE_BL (1 << 1)
-int rtc_get(struct rtc_time *tm)
-{
- u8 buf[M41T62_DATETIME_REG_SIZE];
-
- i2c_read(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+#define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */
+static void m41t62_update_rtc_time(struct rtc_time *tm, u8 *buf)
+{
debug("%s: raw read data - sec=%02x, min=%02x, hr=%02x, "
"mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n",
__FUNCTION__,
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7]);
- tm->tm_sec = BCD2BIN(buf[M41T62_REG_SEC] & 0x7f);
- tm->tm_min = BCD2BIN(buf[M41T62_REG_MIN] & 0x7f);
- tm->tm_hour = BCD2BIN(buf[M41T62_REG_HOUR] & 0x3f);
- tm->tm_mday = BCD2BIN(buf[M41T62_REG_DAY] & 0x3f);
+ tm->tm_sec = bcd2bin(buf[M41T62_REG_SEC] & 0x7f);
+ tm->tm_min = bcd2bin(buf[M41T62_REG_MIN] & 0x7f);
+ tm->tm_hour = bcd2bin(buf[M41T62_REG_HOUR] & 0x3f);
+ tm->tm_mday = bcd2bin(buf[M41T62_REG_DAY] & 0x3f);
tm->tm_wday = buf[M41T62_REG_WDAY] & 0x07;
- tm->tm_mon = BCD2BIN(buf[M41T62_REG_MON] & 0x1f);
+ tm->tm_mon = bcd2bin(buf[M41T62_REG_MON] & 0x1f);
/* assume 20YY not 19YY, and ignore the Century Bit */
/* U-Boot needs to add 1900 here */
- tm->tm_year = BCD2BIN(buf[M41T62_REG_YEAR]) + 100 + 1900;
+ tm->tm_year = bcd2bin(buf[M41T62_REG_YEAR]) + 100 + 1900;
debug("%s: tm is secs=%d, mins=%d, hours=%d, "
"mday=%d, mon=%d, year=%d, wday=%d\n",
__FUNCTION__,
tm->tm_sec, tm->tm_min, tm->tm_hour,
tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
-
- return 0;
}
-void rtc_set(struct rtc_time *tm)
+static void m41t62_set_rtc_buf(const struct rtc_time *tm, u8 *buf)
{
- u8 buf[M41T62_DATETIME_REG_SIZE];
-
debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
- i2c_read(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
-
/* Merge time-data and register flags into buf[0..7] */
buf[M41T62_REG_SSEC] = 0;
buf[M41T62_REG_SEC] =
- BIN2BCD(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f);
+ bin2bcd(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f);
buf[M41T62_REG_MIN] =
- BIN2BCD(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f);
+ bin2bcd(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f);
buf[M41T62_REG_HOUR] =
- BIN2BCD(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ;
+ bin2bcd(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ;
buf[M41T62_REG_WDAY] =
(tm->tm_wday & 0x07) | (buf[M41T62_REG_WDAY] & ~0x07);
buf[M41T62_REG_DAY] =
- BIN2BCD(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
+ bin2bcd(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
buf[M41T62_REG_MON] =
- BIN2BCD(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
+ bin2bcd(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
/* assume 20YY not 19YY */
- buf[M41T62_REG_YEAR] = BIN2BCD(tm->tm_year % 100);
+ buf[M41T62_REG_YEAR] = bin2bcd(tm->tm_year % 100);
+}
+
+#ifdef CONFIG_DM_RTC
+static int m41t62_rtc_get(struct udevice *dev, struct rtc_time *tm)
+{
+ u8 buf[M41T62_DATETIME_REG_SIZE];
+ int ret;
- if (i2c_write(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE))
+ ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
+ if (ret)
+ return ret;
+
+ m41t62_update_rtc_time(tm, buf);
+
+ return 0;
+}
+
+static int m41t62_rtc_set(struct udevice *dev, const struct rtc_time *tm)
+{
+ u8 buf[M41T62_DATETIME_REG_SIZE];
+ int ret;
+
+ ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
+ if (ret)
+ return ret;
+
+ m41t62_set_rtc_buf(tm, buf);
+
+ ret = dm_i2c_write(dev, 0, buf, sizeof(buf));
+ if (ret) {
printf("I2C write failed in %s()\n", __func__);
+ return ret;
+ }
+
+ return 0;
}
-void rtc_reset(void)
+static int m41t62_rtc_reset(struct udevice *dev)
{
+ u8 val;
+
/*
- * Nothing to do
+ * M41T82: Make sure HT (Halt Update) bit is cleared.
+ * This bit is 0 in M41T62 so its save to clear it always.
*/
+
+ int ret = dm_i2c_read(dev, M41T62_REG_ALARM_HOUR, &val, sizeof(val));
+
+ val &= ~M41T80_ALHOUR_HT;
+ ret |= dm_i2c_write(dev, M41T62_REG_ALARM_HOUR, &val, sizeof(val));
+
+ return ret;
}
-#endif
+static const struct rtc_ops m41t62_rtc_ops = {
+ .get = m41t62_rtc_get,
+ .set = m41t62_rtc_set,
+ .reset = m41t62_rtc_reset,
+};
+
+static const struct udevice_id m41t62_rtc_ids[] = {
+ { .compatible = "st,m41t62" },
+ { .compatible = "microcrystal,rv4162" },
+ { }
+};
+
+U_BOOT_DRIVER(rtc_m41t62) = {
+ .name = "rtc-m41t62",
+ .id = UCLASS_RTC,
+ .of_match = m41t62_rtc_ids,
+ .ops = &m41t62_rtc_ops,
+};
+
+#else /* NON DM RTC code - will be removed */
+int rtc_get(struct rtc_time *tm)
+{
+ u8 buf[M41T62_DATETIME_REG_SIZE];
+
+ i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+ m41t62_update_rtc_time(tm, buf);
+
+ return 0;
+}
+
+int rtc_set(struct rtc_time *tm)
+{
+ u8 buf[M41T62_DATETIME_REG_SIZE];
+
+ i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+ m41t62_set_rtc_buf(tm, buf);
+
+ if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf,
+ M41T62_DATETIME_REG_SIZE)) {
+ printf("I2C write failed in %s()\n", __func__);
+ return -1;
+ }
+
+ return 0;
+}
+
+void rtc_reset(void)
+{
+ u8 val;
+
+ /*
+ * M41T82: Make sure HT (Halt Update) bit is cleared.
+ * This bit is 0 in M41T62 so its save to clear it always.
+ */
+ i2c_read(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
+ val &= ~M41T80_ALHOUR_HT;
+ i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
+}
+#endif /* CONFIG_DM_RTC */
projects / platform / kernel / u-boot.git / blobdiff