Add support of driver model of pcf8563
Signed-off-by: Biwen Li biwen.li@nxp.com --- Changes in v4: - update commit messages - update copyright
Changes in v3: - update commit messages
Changes in v2: - none
drivers/rtc/pcf8563.c | 108 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+)
diff --git a/drivers/rtc/pcf8563.c b/drivers/rtc/pcf8563.c index a839d6cc98..d99e0b70a6 100644 --- a/drivers/rtc/pcf8563.c +++ b/drivers/rtc/pcf8563.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2001 + * (C) Copyright 2019 NXP * Wolfgang Denk, DENX Software Engineering, wd@denx.de. */
@@ -12,9 +13,11 @@
#include <common.h> #include <command.h> +#include <dm.h> #include <rtc.h> #include <i2c.h>
+#if !CONFIG_IS_ENABLED(DM_RTC) static uchar rtc_read (uchar reg); static void rtc_write (uchar reg, uchar val);
@@ -115,3 +118,108 @@ static void rtc_write (uchar reg, uchar val) { i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val); } +#else +static int pcf8563_rtc_get(struct udevice *dev, struct rtc_time *tmp) +{ + int rel = 0; + uchar sec, min, hour, mday, wday, mon_cent, year; + + sec = dm_i2c_reg_read(dev, 0x02); + min = dm_i2c_reg_read(dev, 0x03); + hour = dm_i2c_reg_read(dev, 0x04); + mday = dm_i2c_reg_read(dev, 0x05); + wday = dm_i2c_reg_read(dev, 0x06); + mon_cent = dm_i2c_reg_read(dev, 0x07); + year = dm_i2c_reg_read(dev, 0x08); + + debug ("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x " + "hr: %02x min: %02x sec: %02x\n", + year, mon_cent, mday, wday, + hour, min, sec); + debug ("Alarms: wday: %02x day: %02x hour: %02x min: %02x\n", + dm_i2c_reg_read(dev, 0x0C), + dm_i2c_reg_read(dev, 0x0B), + dm_i2c_reg_read(dev, 0x0A), + dm_i2c_reg_read(dev, 0x09)); + + if (sec & 0x80) { + puts ("### Warning: RTC Low Voltage - date/time not reliable\n"); + 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) ? 1900 : 2000); + tmp->tm_wday = bcd2bin (wday & 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 pcf8563_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); + + dm_i2c_reg_write(dev, 0x08, bin2bcd(tmp->tm_year % 100)); + + century = (tmp->tm_year >= 2000) ? 0 : 0x80; + dm_i2c_reg_write(dev, 0x07, bin2bcd(tmp->tm_mon) | century); + + dm_i2c_reg_write(dev, 0x06, bin2bcd(tmp->tm_wday)); + dm_i2c_reg_write(dev, 0x05, bin2bcd(tmp->tm_mday)); + dm_i2c_reg_write(dev, 0x04, bin2bcd(tmp->tm_hour)); + dm_i2c_reg_write(dev, 0x03, bin2bcd(tmp->tm_min)); + dm_i2c_reg_write(dev, 0x02, bin2bcd(tmp->tm_sec)); + + return 0; +} + +static int pcf8563_rtc_reset(struct udevice *dev) +{ + /* clear all control & status registers */ + dm_i2c_reg_write(dev, 0x00, 0x00); + dm_i2c_reg_write(dev, 0x01, 0x00); + dm_i2c_reg_write(dev, 0x0D, 0x00); + + /* clear Voltage Low bit */ + dm_i2c_reg_write(dev, 0x02, dm_i2c_reg_read (dev, 0x02) & 0x7F); + + /* reset all alarms */ + dm_i2c_reg_write(dev, 0x09, 0x00); + dm_i2c_reg_write(dev, 0x0A, 0x00); + dm_i2c_reg_write(dev, 0x0B, 0x00); + dm_i2c_reg_write(dev, 0x0C, 0x00); + + return 0; +} + +static const struct rtc_ops pcf8563_rtc_ops = { + .get = pcf8563_rtc_get, + .set = pcf8563_rtc_set, + .reset = pcf8563_rtc_reset, +}; + +static const struct udevice_id pcf8563_rtc_ids[] = { + { .compatible = "nxp,pcf8563" }, + { } +}; + +U_BOOT_DRIVER(rtc_pcf8563) = { + .name = "rtc-pcf8563", + .id = UCLASS_RTC, + .of_match = pcf8563_rtc_ids, + .ops = &pcf8563_rtc_ops, +}; +#endif