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rtc: rv3029: update to support DM and sync with Linux 4.17
The "Flamingo" carrier-board for the RK3399-Q7 has a RV3029 populated and the application will use the off-module RV3029 RTC including the battery backed SRAM. To support this use case, this commit includes the following changes: * updates the rv3029 driver to use DM * implements the read8/write8 operations This syncs the implementation with the Linux code (based on 4.17), porting the trickle-charger support from there (with improvements to avoid unnecessary EEPROM updates) and adheres to the Linux DTS binding. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
This commit is contained in:
Philipp Tomsich
parent
a3716b5f3f
commit
a73610d2c6
2 changed files with 450 additions and 145 deletions
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@ -1,189 +1,495 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2010
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* Heiko Schocher, DENX Software Engineering, hs@denx.de
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* (C) Copyright 2018 Theobroma Systems Design und Consulting GmbH
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*
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* Based on a the Linux rtc-rv3029c2.c driver written by:
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* Gregory Hermant <gregory.hermant@calao-systems.com>
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* Michael Buesch <m@bues.ch>
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*/
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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 <rtc.h>
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#define RTC_RV3029_CTRL1 0x00
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#define RTC_RV3029_CTRL1_EERE (1 << 3)
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#define RTC_RV3029_PAGE_LEN 7
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#define RTC_RV3029_CTRL_STATUS 0x03
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#define RTC_RV3029_CTRLS_EEBUSY (1 << 7)
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/* control section */
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#define RV3029_ONOFF_CTRL 0x00
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#define RV3029_ONOFF_CTRL_WE BIT(0)
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#define RV3029_ONOFF_CTRL_TE BIT(1)
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#define RV3029_ONOFF_CTRL_TAR BIT(2)
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#define RV3029_ONOFF_CTRL_EERE BIT(3)
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#define RV3029_ONOFF_CTRL_SRON BIT(4)
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#define RV3029_ONOFF_CTRL_TD0 BIT(5)
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#define RV3029_ONOFF_CTRL_TD1 BIT(6)
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#define RV3029_ONOFF_CTRL_CLKINT BIT(7)
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#define RV3029_IRQ_CTRL 0x01
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#define RV3029_IRQ_CTRL_AIE BIT(0)
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#define RV3029_IRQ_CTRL_TIE BIT(1)
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#define RV3029_IRQ_CTRL_V1IE BIT(2)
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#define RV3029_IRQ_CTRL_V2IE BIT(3)
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#define RV3029_IRQ_CTRL_SRIE BIT(4)
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#define RV3029_IRQ_FLAGS 0x02
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#define RV3029_IRQ_FLAGS_AF BIT(0)
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#define RV3029_IRQ_FLAGS_TF BIT(1)
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#define RV3029_IRQ_FLAGS_V1IF BIT(2)
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#define RV3029_IRQ_FLAGS_V2IF BIT(3)
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#define RV3029_IRQ_FLAGS_SRF BIT(4)
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#define RV3029_STATUS 0x03
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#define RV3029_STATUS_VLOW1 BIT(2)
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#define RV3029_STATUS_VLOW2 BIT(3)
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#define RV3029_STATUS_SR BIT(4)
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#define RV3029_STATUS_PON BIT(5)
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#define RV3029_STATUS_EEBUSY BIT(7)
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#define RV3029_RST_CTRL 0x04
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#define RV3029_RST_CTRL_SYSR BIT(4)
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#define RV3029_CONTROL_SECTION_LEN 0x05
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#define RTC_RV3029_CTRL_RESET 0x04
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#define RTC_RV3029_CTRL_SYS_R (1 << 4)
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/* watch section */
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#define RV3029_W_SEC 0x08
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#define RV3029_W_MINUTES 0x09
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#define RV3029_W_HOURS 0x0A
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#define RV3029_REG_HR_12_24 BIT(6) /* 24h/12h mode */
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#define RV3029_REG_HR_PM BIT(5) /* PM/AM bit in 12h mode */
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#define RV3029_W_DATE 0x0B
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#define RV3029_W_DAYS 0x0C
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#define RV3029_W_MONTHS 0x0D
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#define RV3029_W_YEARS 0x0E
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#define RTC_RV3029_CLOCK_PAGE 0x08
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#define RTC_RV3029_PAGE_LEN 7
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/* eeprom control section */
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#define RV3029_CONTROL_E2P_EECTRL 0x30
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#define RV3029_TRICKLE_1K BIT(4) /* 1.5K resistance */
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#define RV3029_TRICKLE_5K BIT(5) /* 5K resistance */
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#define RV3029_TRICKLE_20K BIT(6) /* 20K resistance */
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#define RV3029_TRICKLE_80K BIT(7) /* 80K resistance */
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#define RV3029_TRICKLE_MASK (RV3029_TRICKLE_1K |\
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RV3029_TRICKLE_5K |\
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RV3029_TRICKLE_20K |\
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RV3029_TRICKLE_80K)
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#define RV3029_TRICKLE_SHIFT 4
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#define RV3029C2_W_SECONDS 0x00
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#define RV3029C2_W_MINUTES 0x01
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#define RV3029C2_W_HOURS 0x02
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#define RV3029C2_W_DATE 0x03
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#define RV3029C2_W_DAYS 0x04
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#define RV3029C2_W_MONTHS 0x05
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#define RV3029C2_W_YEARS 0x06
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#define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */
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#define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */
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#define RTC_RV3029_EEPROM_CTRL 0x30
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#define RTC_RV3029_TRICKLE_1K (1 << 4)
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#define RTC_RV3029_TRICKLE_5K (1 << 5)
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#define RTC_RV3029_TRICKLE_20K (1 << 6)
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#define RTC_RV3029_TRICKLE_80K (1 << 7)
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int rtc_get( struct rtc_time *tmp )
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static int rv3029_rtc_get(struct udevice *dev, struct rtc_time *tm)
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{
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int ret;
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unsigned char buf[RTC_RV3029_PAGE_LEN];
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u8 regs[RTC_RV3029_PAGE_LEN];
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int ret;
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ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \
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RTC_RV3029_PAGE_LEN);
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if (ret) {
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ret = dm_i2c_read(dev, RV3029_W_SEC, regs, sizeof(regs));
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if (ret < 0) {
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printf("%s: error reading RTC: %x\n", __func__, ret);
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return -1;
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return -EIO;
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}
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tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f);
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tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f);
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if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) {
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/* 12h format */
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tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f);
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if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM)
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/* PM flag set */
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tmp->tm_hour += 12;
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} else
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tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f);
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tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F );
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tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F );
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tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 );
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tm->tm_sec = bcd2bin(regs[RV3029_W_SEC - RV3029_W_SEC]);
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tm->tm_min = bcd2bin(regs[RV3029_W_MINUTES - RV3029_W_SEC]);
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/* HR field has a more complex interpretation */
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{
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const u8 _hr = regs[RV3029_W_HOURS - RV3029_W_SEC];
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if (_hr & RV3029_REG_HR_12_24) {
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/* 12h format */
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tm->tm_hour = bcd2bin(_hr & 0x1f);
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if (_hr & RV3029_REG_HR_PM) /* PM flag set */
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tm->tm_hour += 12;
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} else {
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/* 24h format */
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tm->tm_hour = bcd2bin(_hr & 0x3f);
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}
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}
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tm->tm_mday = bcd2bin(regs[RV3029_W_DATE - RV3029_W_SEC]);
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tm->tm_mon = bcd2bin(regs[RV3029_W_MONTHS - RV3029_W_SEC]) - 1;
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/* RTC supports only years > 1999 */
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tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000;
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tmp->tm_yday = 0;
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tmp->tm_isdst = 0;
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tm->tm_year = bcd2bin(regs[RV3029_W_YEARS - RV3029_W_SEC]) + 2000;
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tm->tm_wday = bcd2bin(regs[RV3029_W_DAYS - RV3029_W_SEC]) - 1;
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debug( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec );
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tm->tm_yday = 0;
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tm->tm_isdst = 0;
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debug("%s: %4d-%02d-%02d (wday=%d) %2d:%02d:%02d\n",
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__func__, tm->tm_year, tm->tm_mon, tm->tm_mday,
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tm->tm_wday, tm->tm_hour, tm->tm_min, tm->tm_sec);
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return 0;
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}
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int rtc_set( struct rtc_time *tmp )
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static int rv3029_rtc_set(struct udevice *dev, const struct rtc_time *tm)
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{
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int ret;
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unsigned char buf[RTC_RV3029_PAGE_LEN];
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u8 regs[RTC_RV3029_PAGE_LEN];
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debug( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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debug("%s: %4d-%02d-%02d (wday=%d( %2d:%02d:%02d\n",
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__func__, tm->tm_year, tm->tm_mon, tm->tm_mday,
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tm->tm_wday, tm->tm_hour, tm->tm_min, tm->tm_sec);
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if (tmp->tm_year < 2000) {
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printf("RTC: year %d < 2000 not possible\n", tmp->tm_year);
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return -1;
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if (tm->tm_year < 2000) {
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printf("%s: year %d (before 2000) not supported\n",
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__func__, tm->tm_year);
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return -EINVAL;
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}
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buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec);
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buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min);
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buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour);
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/* set 24h format */
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buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24;
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buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday);
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buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday);
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buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon);
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tmp->tm_year -= 2000;
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buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year);
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ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1,
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buf, RTC_RV3029_PAGE_LEN);
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/* give the RTC some time to update */
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udelay(1000);
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return ret;
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regs[RV3029_W_SEC - RV3029_W_SEC] = bin2bcd(tm->tm_sec);
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regs[RV3029_W_MINUTES - RV3029_W_SEC] = bin2bcd(tm->tm_min);
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regs[RV3029_W_HOURS - RV3029_W_SEC] = bin2bcd(tm->tm_hour);
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regs[RV3029_W_DATE - RV3029_W_SEC] = bin2bcd(tm->tm_mday);
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regs[RV3029_W_MONTHS - RV3029_W_SEC] = bin2bcd(tm->tm_mon + 1);
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regs[RV3029_W_DAYS - RV3029_W_SEC] = bin2bcd(tm->tm_wday + 1) & 0x7;
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regs[RV3029_W_YEARS - RV3029_W_SEC] = bin2bcd(tm->tm_year - 2000);
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return dm_i2c_write(dev, RV3029_W_SEC, regs, sizeof(regs));
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}
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/* sets EERE-Bit (automatic EEPROM refresh) */
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static void set_eere_bit(int state)
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static int rv3029_rtc_reset(struct udevice *dev)
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{
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unsigned char reg_ctrl1;
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u8 ctrl = RV3029_RST_CTRL_SYSR;
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unsigned long start;
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const unsigned long timeout_ms = 10000;
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int ret;
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(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1,
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®_ctrl1, 1);
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/* trigger the system-reset */
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ret = dm_i2c_write(dev, RV3029_RST_CTRL, &ctrl, 1);
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if (ret < 0)
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return -EIO;
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if (state)
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reg_ctrl1 |= RTC_RV3029_CTRL1_EERE;
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else
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reg_ctrl1 &= (~RTC_RV3029_CTRL1_EERE);
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/* wait for the system-reset to complete */
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start = get_timer(0);
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do {
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if (get_timer(start) > timeout_ms)
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return -ETIMEDOUT;
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(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1,
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®_ctrl1, 1);
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ret = dm_i2c_read(dev, RV3029_RST_CTRL, &ctrl, 1);
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if (ret < 0)
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return -EIO;
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} while (ctrl & RV3029_RST_CTRL_SYSR);
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return 0;
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}
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/* waits until EEPROM page is no longer busy (times out after 10ms*loops) */
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static int wait_eebusy(int loops)
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static int rv3029_rtc_read8(struct udevice *dev, unsigned int reg)
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{
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int i;
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unsigned char ctrl_status;
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u8 data;
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int ret;
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for (i = 0; i < loops; i++) {
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(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_STATUS,
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1, &ctrl_status, 1);
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ret = dm_i2c_read(dev, reg, &data, sizeof(data));
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return ret < 0 ? ret : data;
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}
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if ((ctrl_status & RTC_RV3029_CTRLS_EEBUSY) == 0)
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static int rv3029_rtc_write8(struct udevice *dev, unsigned int reg, int val)
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{
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u8 data = val;
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return dm_i2c_write(dev, reg, &data, 1);
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}
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#if defined(OF_CONTROL)
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static int rv3029_get_sr(struct udevice *dev, u8 *buf)
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{
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int ret = dm_i2c_read(dev, RV3029_STATUS, buf, 1);
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if (ret < 0)
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return -EIO;
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dev_dbg(dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
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return 0;
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}
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static int rv3029_set_sr(struct udevice *dev, u8 val)
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{
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int ret;
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ret = dm_i2c_read(dev, RV3029_STATUS, &val, 1);
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if (ret < 0)
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return -EIO;
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dev_dbg(dev, "status = 0x%.2x (%d)\n", val, val);
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return 0;
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}
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static int rv3029_eeprom_busywait(struct udevice *dev)
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{
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int i, ret;
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u8 sr;
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for (i = 100; i > 0; i--) {
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ret = rv3029_get_sr(dev, &sr);
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if (ret < 0)
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break;
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if (!(sr & RV3029_STATUS_EEBUSY))
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break;
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udelay(10000);
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}
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return i;
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}
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void rtc_reset (void)
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{
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unsigned char buf[RTC_RV3029_PAGE_LEN];
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buf[0] = RTC_RV3029_CTRL_SYS_R;
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(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1,
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buf, 1);
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#if defined(CONFIG_SYS_RV3029_TCR)
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/*
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* because EEPROM_CTRL register is in EEPROM page it is necessary to
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* disable automatic EEPROM refresh and check if EEPROM is busy
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* before EEPORM_CTRL register may be accessed
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*/
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set_eere_bit(0);
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wait_eebusy(100);
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/* read current trickle charger setting */
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(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_EEPROM_CTRL,
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1, buf, 1);
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/* enable automatic EEPROM refresh again */
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set_eere_bit(1);
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/*
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* to minimize EEPROM access write trickle charger setting only if it
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* differs from current value
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*/
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if ((buf[0] & 0xF0) != CONFIG_SYS_RV3029_TCR) {
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buf[0] = (buf[0] & 0x0F) | CONFIG_SYS_RV3029_TCR;
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/*
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* write trickle charger setting (disable autom. EEPROM
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* refresh and wait until EEPROM is idle)
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*/
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set_eere_bit(0);
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wait_eebusy(100);
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(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR,
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RTC_RV3029_EEPROM_CTRL, 1, buf, 1);
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/*
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* it is necessary to wait 10ms before EEBUSY-Bit may be read
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* (this is not documented in the data sheet yet, but the
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* manufacturer recommends it)
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*/
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udelay(10000);
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/* wait until EEPROM write access is finished */
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wait_eebusy(100);
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set_eere_bit(1);
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if (i <= 0) {
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dev_err(dev, "EEPROM busy wait timeout.\n");
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return -ETIMEDOUT;
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}
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#endif
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return ret;
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}
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static int rv3029_update_bits(struct udevice *dev, u8 reg, u8 mask, u8 set)
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{
|
||||
u8 buf;
|
||||
int ret;
|
||||
|
||||
ret = dm_i2c_read(dev, reg, &buf, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if ((buf & mask) == (set && mask))
|
||||
return 0;
|
||||
|
||||
buf = (buf & ~mask) | (set & mask);
|
||||
ret = dm_i2c_read(dev, reg, &buf, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rv3029_eeprom_exit(struct udevice *dev)
|
||||
{
|
||||
/* Re-enable eeprom refresh */
|
||||
return rv3029_update_bits(dev, RV3029_ONOFF_CTRL,
|
||||
RV3029_ONOFF_CTRL_EERE,
|
||||
RV3029_ONOFF_CTRL_EERE);
|
||||
}
|
||||
|
||||
static int rv3029_eeprom_enter(struct udevice *dev)
|
||||
{
|
||||
int ret;
|
||||
u8 sr;
|
||||
|
||||
/* Check whether we are in the allowed voltage range. */
|
||||
ret = rv3029_get_sr(dev, &sr);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (sr & (RV3029_STATUS_VLOW1 | RV3029_STATUS_VLOW2)) {
|
||||
/* We clear the bits and retry once just in case
|
||||
* we had a brown out in early startup.
|
||||
*/
|
||||
sr &= ~RV3029_STATUS_VLOW1;
|
||||
sr &= ~RV3029_STATUS_VLOW2;
|
||||
ret = rv3029_set_sr(dev, sr);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
udelay(10000);
|
||||
ret = rv3029_get_sr(dev, &sr);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (sr & (RV3029_STATUS_VLOW1 | RV3029_STATUS_VLOW2)) {
|
||||
dev_err(dev, "Supply voltage is too low to safely access the EEPROM.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
|
||||
/* Disable eeprom refresh. */
|
||||
ret = rv3029_update_bits(dev,
|
||||
RV3029_ONOFF_CTRL, RV3029_ONOFF_CTRL_EERE, 0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Wait for any previous eeprom accesses to finish. */
|
||||
ret = rv3029_eeprom_busywait(dev);
|
||||
if (ret < 0)
|
||||
rv3029_eeprom_exit(dev);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rv3029_eeprom_read(struct udevice *dev, u8 reg,
|
||||
u8 buf[], size_t len)
|
||||
{
|
||||
int ret, err;
|
||||
|
||||
err = rv3029_eeprom_enter(dev);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
ret = dm_i2c_read(dev, reg, buf, len);
|
||||
|
||||
err = rv3029_eeprom_exit(dev);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rv3029_eeprom_write(struct udevice *dev, u8 reg,
|
||||
u8 const buf[], size_t len)
|
||||
{
|
||||
int ret;
|
||||
size_t i;
|
||||
u8 tmp;
|
||||
|
||||
ret = rv3029_eeprom_enter(dev);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
for (i = 0; i < len; i++, reg++) {
|
||||
ret = dm_i2c_read(dev, reg, &tmp, 1);
|
||||
if (ret < 0)
|
||||
break;
|
||||
if (tmp != buf[i]) {
|
||||
ret = dm_i2c_write(dev, reg, &buf[i], 1);
|
||||
if (ret < 0)
|
||||
break;
|
||||
}
|
||||
ret = rv3029_eeprom_busywait(dev);
|
||||
if (ret < 0)
|
||||
break;
|
||||
}
|
||||
|
||||
ret = rv3029_eeprom_exit(dev);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rv3029_eeprom_update_bits(struct udevice *dev,
|
||||
u8 reg, u8 mask, u8 set)
|
||||
{
|
||||
u8 buf;
|
||||
int ret;
|
||||
|
||||
ret = rv3029_eeprom_read(dev, reg, &buf, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* If the EEPROM already reads the correct bitpattern, we don't need
|
||||
* to update it.
|
||||
*/
|
||||
if ((buf & mask) == (set & mask))
|
||||
return 0;
|
||||
|
||||
buf = (buf & ~mask) | (set & mask);
|
||||
ret = rv3029_eeprom_write(dev, reg, &buf, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void rv3029_trickle_config(struct udevice *dev)
|
||||
{
|
||||
static const struct rv3029_trickle_tab_elem {
|
||||
u32 r; /* resistance in ohms */
|
||||
u8 conf; /* trickle config bits */
|
||||
} rv3029_trickle_tab[] = {
|
||||
{
|
||||
.r = 1076,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_5K |
|
||||
RV3029_TRICKLE_20K | RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 1091,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_5K |
|
||||
RV3029_TRICKLE_20K,
|
||||
}, {
|
||||
.r = 1137,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_5K |
|
||||
RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 1154,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_5K,
|
||||
}, {
|
||||
.r = 1371,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_20K |
|
||||
RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 1395,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_20K,
|
||||
}, {
|
||||
.r = 1472,
|
||||
.conf = RV3029_TRICKLE_1K | RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 1500,
|
||||
.conf = RV3029_TRICKLE_1K,
|
||||
}, {
|
||||
.r = 3810,
|
||||
.conf = RV3029_TRICKLE_5K | RV3029_TRICKLE_20K |
|
||||
RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 4000,
|
||||
.conf = RV3029_TRICKLE_5K | RV3029_TRICKLE_20K,
|
||||
}, {
|
||||
.r = 4706,
|
||||
.conf = RV3029_TRICKLE_5K | RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 5000,
|
||||
.conf = RV3029_TRICKLE_5K,
|
||||
}, {
|
||||
.r = 16000,
|
||||
.conf = RV3029_TRICKLE_20K | RV3029_TRICKLE_80K,
|
||||
}, {
|
||||
.r = 20000,
|
||||
.conf = RV3029_TRICKLE_20K,
|
||||
}, {
|
||||
.r = 80000,
|
||||
.conf = RV3029_TRICKLE_80K,
|
||||
},
|
||||
};
|
||||
int err;
|
||||
u32 ohms;
|
||||
u8 trickle_set_bits = 0;
|
||||
|
||||
/* Configure the trickle charger. */
|
||||
err = dev_read_u32(dev, "trickle-resistor-ohms", &ohms);
|
||||
|
||||
if (!err) {
|
||||
/* Find trickle-charger config */
|
||||
for (int i = 0; i < ARRAY_SIZE(rv3029_trickle_tab); i++)
|
||||
if (rv3029_trickle_tab[i].r >= ohms) {
|
||||
dev_dbg(dev, "trickle charger at %d ohms\n",
|
||||
rv3029_trickle_tab[i].r);
|
||||
trickle_set_bits = rv3029_trickle_tab[i].conf;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
dev_dbg(dev, "trickle charger config 0x%x\n", trickle_set_bits);
|
||||
err = rv3029_eeprom_update_bits(dev, RV3029_CONTROL_E2P_EECTRL,
|
||||
RV3029_TRICKLE_MASK,
|
||||
trickle_set_bits);
|
||||
if (err < 0)
|
||||
dev_dbg(dev, "failed to update trickle charger\n");
|
||||
}
|
||||
#else
|
||||
static inline void rv3029_trickle_config(struct udevice *dev)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
static int rv3029_probe(struct udevice *dev)
|
||||
{
|
||||
i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS |
|
||||
DM_I2C_CHIP_WR_ADDRESS);
|
||||
|
||||
rv3029_trickle_config(dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct rtc_ops rv3029_rtc_ops = {
|
||||
.get = rv3029_rtc_get,
|
||||
.set = rv3029_rtc_set,
|
||||
.read8 = rv3029_rtc_read8,
|
||||
.write8 = rv3029_rtc_write8,
|
||||
.reset = rv3029_rtc_reset,
|
||||
};
|
||||
|
||||
static const struct udevice_id rv3029_rtc_ids[] = {
|
||||
{ .compatible = "mc,rv3029" },
|
||||
{ .compatible = "mc,rv3029c2" },
|
||||
{ }
|
||||
};
|
||||
|
||||
U_BOOT_DRIVER(rtc_rv3029) = {
|
||||
.name = "rtc-rv3029",
|
||||
.id = UCLASS_RTC,
|
||||
.probe = rv3029_probe,
|
||||
.of_match = rv3029_rtc_ids,
|
||||
.ops = &rv3029_rtc_ops,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -4054,7 +4054,6 @@ CONFIG_SYS_RTC_CNT
|
|||
CONFIG_SYS_RTC_OSCILLATOR
|
||||
CONFIG_SYS_RTC_REG_BASE_ADDR
|
||||
CONFIG_SYS_RTC_SETUP
|
||||
CONFIG_SYS_RV3029_TCR
|
||||
CONFIG_SYS_RX_ETH_BUFFER
|
||||
CONFIG_SYS_SATA
|
||||
CONFIG_SYS_SATA1
|
||||
|
|
|
|||
Loading…
Reference in a new issue