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https://source.denx.de/u-boot/u-boot.git
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
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* Copyright (C) 2016 by NXP Semiconductors Inc.
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* Date & Time support for PCF2127 RTC
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <i2c.h>
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#include <log.h>
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#include <rtc.h>
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#define PCF2127_REG_CTRL1 0x00
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#define PCF2127_REG_CTRL2 0x01
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#define PCF2127_REG_CTRL3 0x02
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#define PCF2127_REG_SC 0x03
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#define PCF2127_REG_MN 0x04
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#define PCF2127_REG_HR 0x05
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#define PCF2127_REG_DM 0x06
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#define PCF2127_REG_DW 0x07
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#define PCF2127_REG_MO 0x08
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#define PCF2127_REG_YR 0x09
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static int pcf2127_rtc_read(struct udevice *dev, uint offset, u8 *buffer, uint len)
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{
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struct dm_i2c_chip *chip = dev_get_parent_plat(dev);
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struct i2c_msg msg;
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int ret;
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/* Set the address of the start register to be read */
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ret = dm_i2c_write(dev, offset, NULL, 0);
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if (ret < 0)
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return ret;
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/* Read register's data */
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msg.addr = chip->chip_addr;
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msg.flags |= I2C_M_RD;
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msg.len = len;
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msg.buf = buffer;
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return dm_i2c_xfer(dev, &msg, 1);
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}
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static int pcf2127_rtc_write(struct udevice *dev, uint offset,
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const u8 *buffer, uint len)
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{
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return dm_i2c_write(dev, offset, buffer, len);
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}
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static int pcf2127_rtc_set(struct udevice *dev, const struct rtc_time *tm)
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{
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uchar buf[7] = {0};
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int i = 0, ret;
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/* hours, minutes and seconds */
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buf[i++] = bin2bcd(tm->tm_sec);
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buf[i++] = bin2bcd(tm->tm_min);
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buf[i++] = bin2bcd(tm->tm_hour);
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buf[i++] = bin2bcd(tm->tm_mday);
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buf[i++] = tm->tm_wday & 0x07;
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/* month, 1 - 12 */
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buf[i++] = bin2bcd(tm->tm_mon);
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/* year */
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buf[i++] = bin2bcd(tm->tm_year % 100);
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/* write register's data */
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ret = dm_i2c_write(dev, PCF2127_REG_SC, buf, i);
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return ret;
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}
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static int pcf2127_rtc_get(struct udevice *dev, struct rtc_time *tm)
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{
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int ret = 0;
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uchar buf[10] = { PCF2127_REG_CTRL1 };
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ret = pcf2127_rtc_read(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
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if (ret < 0)
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return ret;
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if (buf[PCF2127_REG_CTRL3] & 0x04)
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puts("### Warning: RTC Low Voltage - date/time not reliable\n");
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tm->tm_sec = bcd2bin(buf[PCF2127_REG_SC] & 0x7F);
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tm->tm_min = bcd2bin(buf[PCF2127_REG_MN] & 0x7F);
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tm->tm_hour = bcd2bin(buf[PCF2127_REG_HR] & 0x3F);
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tm->tm_mday = bcd2bin(buf[PCF2127_REG_DM] & 0x3F);
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tm->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F);
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tm->tm_year = bcd2bin(buf[PCF2127_REG_YR]) + 1900;
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if (tm->tm_year < 1970)
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tm->tm_year += 100; /* assume we are in 1970...2069 */
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tm->tm_wday = buf[PCF2127_REG_DW] & 0x07;
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tm->tm_yday = 0;
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tm->tm_isdst = 0;
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debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
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tm->tm_hour, tm->tm_min, tm->tm_sec);
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return ret;
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}
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static int pcf2127_rtc_reset(struct udevice *dev)
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{
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/*Doing nothing here*/
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return 0;
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}
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static const struct rtc_ops pcf2127_rtc_ops = {
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.get = pcf2127_rtc_get,
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.set = pcf2127_rtc_set,
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.reset = pcf2127_rtc_reset,
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.read = pcf2127_rtc_read,
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.write = pcf2127_rtc_write,
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};
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static const struct udevice_id pcf2127_rtc_ids[] = {
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{ .compatible = "nxp,pcf2127" },
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{ .compatible = "nxp,pcf2129" },
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{ .compatible = "nxp,pca2129" },
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{ }
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};
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U_BOOT_DRIVER(rtc_pcf2127) = {
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.name = "rtc-pcf2127",
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.id = UCLASS_RTC,
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.of_match = pcf2127_rtc_ids,
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.ops = &pcf2127_rtc_ops,
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};
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