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
@ -1,189 +1,495 @@
|
|||||||
// SPDX-License-Identifier: GPL-2.0+
|
// SPDX-License-Identifier: GPL-2.0+
|
||||||
/*
|
/*
|
||||||
* (C) Copyright 2010
|
* (C) Copyright 2018 Theobroma Systems Design und Consulting GmbH
|
||||||
* Heiko Schocher, DENX Software Engineering, hs@denx.de
|
*
|
||||||
|
* Based on a the Linux rtc-rv3029c2.c driver written by:
|
||||||
|
* Gregory Hermant <gregory.hermant@calao-systems.com>
|
||||||
|
* Michael Buesch <m@bues.ch>
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include <common.h>
|
#include <common.h>
|
||||||
#include <command.h>
|
#include <command.h>
|
||||||
|
#include <dm.h>
|
||||||
#include <i2c.h>
|
#include <i2c.h>
|
||||||
#include <rtc.h>
|
#include <rtc.h>
|
||||||
|
|
||||||
#define RTC_RV3029_CTRL1 0x00
|
#define RTC_RV3029_PAGE_LEN 7
|
||||||
#define RTC_RV3029_CTRL1_EERE (1 << 3)
|
|
||||||
|
|
||||||
#define RTC_RV3029_CTRL_STATUS 0x03
|
/* control section */
|
||||||
#define RTC_RV3029_CTRLS_EEBUSY (1 << 7)
|
#define RV3029_ONOFF_CTRL 0x00
|
||||||
|
#define RV3029_ONOFF_CTRL_WE BIT(0)
|
||||||
|
#define RV3029_ONOFF_CTRL_TE BIT(1)
|
||||||
|
#define RV3029_ONOFF_CTRL_TAR BIT(2)
|
||||||
|
#define RV3029_ONOFF_CTRL_EERE BIT(3)
|
||||||
|
#define RV3029_ONOFF_CTRL_SRON BIT(4)
|
||||||
|
#define RV3029_ONOFF_CTRL_TD0 BIT(5)
|
||||||
|
#define RV3029_ONOFF_CTRL_TD1 BIT(6)
|
||||||
|
#define RV3029_ONOFF_CTRL_CLKINT BIT(7)
|
||||||
|
#define RV3029_IRQ_CTRL 0x01
|
||||||
|
#define RV3029_IRQ_CTRL_AIE BIT(0)
|
||||||
|
#define RV3029_IRQ_CTRL_TIE BIT(1)
|
||||||
|
#define RV3029_IRQ_CTRL_V1IE BIT(2)
|
||||||
|
#define RV3029_IRQ_CTRL_V2IE BIT(3)
|
||||||
|
#define RV3029_IRQ_CTRL_SRIE BIT(4)
|
||||||
|
#define RV3029_IRQ_FLAGS 0x02
|
||||||
|
#define RV3029_IRQ_FLAGS_AF BIT(0)
|
||||||
|
#define RV3029_IRQ_FLAGS_TF BIT(1)
|
||||||
|
#define RV3029_IRQ_FLAGS_V1IF BIT(2)
|
||||||
|
#define RV3029_IRQ_FLAGS_V2IF BIT(3)
|
||||||
|
#define RV3029_IRQ_FLAGS_SRF BIT(4)
|
||||||
|
#define RV3029_STATUS 0x03
|
||||||
|
#define RV3029_STATUS_VLOW1 BIT(2)
|
||||||
|
#define RV3029_STATUS_VLOW2 BIT(3)
|
||||||
|
#define RV3029_STATUS_SR BIT(4)
|
||||||
|
#define RV3029_STATUS_PON BIT(5)
|
||||||
|
#define RV3029_STATUS_EEBUSY BIT(7)
|
||||||
|
#define RV3029_RST_CTRL 0x04
|
||||||
|
#define RV3029_RST_CTRL_SYSR BIT(4)
|
||||||
|
#define RV3029_CONTROL_SECTION_LEN 0x05
|
||||||
|
|
||||||
#define RTC_RV3029_CTRL_RESET 0x04
|
/* watch section */
|
||||||
#define RTC_RV3029_CTRL_SYS_R (1 << 4)
|
#define RV3029_W_SEC 0x08
|
||||||
|
#define RV3029_W_MINUTES 0x09
|
||||||
|
#define RV3029_W_HOURS 0x0A
|
||||||
|
#define RV3029_REG_HR_12_24 BIT(6) /* 24h/12h mode */
|
||||||
|
#define RV3029_REG_HR_PM BIT(5) /* PM/AM bit in 12h mode */
|
||||||
|
#define RV3029_W_DATE 0x0B
|
||||||
|
#define RV3029_W_DAYS 0x0C
|
||||||
|
#define RV3029_W_MONTHS 0x0D
|
||||||
|
#define RV3029_W_YEARS 0x0E
|
||||||
|
|
||||||
#define RTC_RV3029_CLOCK_PAGE 0x08
|
/* eeprom control section */
|
||||||
#define RTC_RV3029_PAGE_LEN 7
|
#define RV3029_CONTROL_E2P_EECTRL 0x30
|
||||||
|
#define RV3029_TRICKLE_1K BIT(4) /* 1.5K resistance */
|
||||||
|
#define RV3029_TRICKLE_5K BIT(5) /* 5K resistance */
|
||||||
|
#define RV3029_TRICKLE_20K BIT(6) /* 20K resistance */
|
||||||
|
#define RV3029_TRICKLE_80K BIT(7) /* 80K resistance */
|
||||||
|
#define RV3029_TRICKLE_MASK (RV3029_TRICKLE_1K |\
|
||||||
|
RV3029_TRICKLE_5K |\
|
||||||
|
RV3029_TRICKLE_20K |\
|
||||||
|
RV3029_TRICKLE_80K)
|
||||||
|
#define RV3029_TRICKLE_SHIFT 4
|
||||||
|
|
||||||
#define RV3029C2_W_SECONDS 0x00
|
|
||||||
#define RV3029C2_W_MINUTES 0x01
|
|
||||||
#define RV3029C2_W_HOURS 0x02
|
|
||||||
#define RV3029C2_W_DATE 0x03
|
|
||||||
#define RV3029C2_W_DAYS 0x04
|
|
||||||
#define RV3029C2_W_MONTHS 0x05
|
|
||||||
#define RV3029C2_W_YEARS 0x06
|
|
||||||
|
|
||||||
#define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */
|
static int rv3029_rtc_get(struct udevice *dev, struct rtc_time *tm)
|
||||||
#define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */
|
|
||||||
|
|
||||||
#define RTC_RV3029_EEPROM_CTRL 0x30
|
|
||||||
#define RTC_RV3029_TRICKLE_1K (1 << 4)
|
|
||||||
#define RTC_RV3029_TRICKLE_5K (1 << 5)
|
|
||||||
#define RTC_RV3029_TRICKLE_20K (1 << 6)
|
|
||||||
#define RTC_RV3029_TRICKLE_80K (1 << 7)
|
|
||||||
|
|
||||||
int rtc_get( struct rtc_time *tmp )
|
|
||||||
{
|
{
|
||||||
int ret;
|
u8 regs[RTC_RV3029_PAGE_LEN];
|
||||||
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
int ret;
|
||||||
|
|
||||||
ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \
|
ret = dm_i2c_read(dev, RV3029_W_SEC, regs, sizeof(regs));
|
||||||
RTC_RV3029_PAGE_LEN);
|
if (ret < 0) {
|
||||||
if (ret) {
|
|
||||||
printf("%s: error reading RTC: %x\n", __func__, ret);
|
printf("%s: error reading RTC: %x\n", __func__, ret);
|
||||||
return -1;
|
return -EIO;
|
||||||
}
|
}
|
||||||
tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f);
|
|
||||||
tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f);
|
|
||||||
if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) {
|
|
||||||
/* 12h format */
|
|
||||||
tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f);
|
|
||||||
if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM)
|
|
||||||
/* PM flag set */
|
|
||||||
tmp->tm_hour += 12;
|
|
||||||
} else
|
|
||||||
tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f);
|
|
||||||
|
|
||||||
tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F );
|
tm->tm_sec = bcd2bin(regs[RV3029_W_SEC - RV3029_W_SEC]);
|
||||||
tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F );
|
tm->tm_min = bcd2bin(regs[RV3029_W_MINUTES - RV3029_W_SEC]);
|
||||||
tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 );
|
|
||||||
|
/* HR field has a more complex interpretation */
|
||||||
|
{
|
||||||
|
const u8 _hr = regs[RV3029_W_HOURS - RV3029_W_SEC];
|
||||||
|
|
||||||
|
if (_hr & RV3029_REG_HR_12_24) {
|
||||||
|
/* 12h format */
|
||||||
|
tm->tm_hour = bcd2bin(_hr & 0x1f);
|
||||||
|
if (_hr & RV3029_REG_HR_PM) /* PM flag set */
|
||||||
|
tm->tm_hour += 12;
|
||||||
|
} else {
|
||||||
|
/* 24h format */
|
||||||
|
tm->tm_hour = bcd2bin(_hr & 0x3f);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
tm->tm_mday = bcd2bin(regs[RV3029_W_DATE - RV3029_W_SEC]);
|
||||||
|
tm->tm_mon = bcd2bin(regs[RV3029_W_MONTHS - RV3029_W_SEC]) - 1;
|
||||||
/* RTC supports only years > 1999 */
|
/* RTC supports only years > 1999 */
|
||||||
tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000;
|
tm->tm_year = bcd2bin(regs[RV3029_W_YEARS - RV3029_W_SEC]) + 2000;
|
||||||
tmp->tm_yday = 0;
|
tm->tm_wday = bcd2bin(regs[RV3029_W_DAYS - RV3029_W_SEC]) - 1;
|
||||||
tmp->tm_isdst = 0;
|
|
||||||
|
|
||||||
debug( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
tm->tm_yday = 0;
|
||||||
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
tm->tm_isdst = 0;
|
||||||
tmp->tm_hour, tmp->tm_min, tmp->tm_sec );
|
|
||||||
|
debug("%s: %4d-%02d-%02d (wday=%d) %2d:%02d:%02d\n",
|
||||||
|
__func__, tm->tm_year, tm->tm_mon, tm->tm_mday,
|
||||||
|
tm->tm_wday, tm->tm_hour, tm->tm_min, tm->tm_sec);
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
int rtc_set( struct rtc_time *tmp )
|
static int rv3029_rtc_set(struct udevice *dev, const struct rtc_time *tm)
|
||||||
{
|
{
|
||||||
int ret;
|
u8 regs[RTC_RV3029_PAGE_LEN];
|
||||||
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
||||||
|
|
||||||
debug( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
debug("%s: %4d-%02d-%02d (wday=%d( %2d:%02d:%02d\n",
|
||||||
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
__func__, tm->tm_year, tm->tm_mon, tm->tm_mday,
|
||||||
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
tm->tm_wday, tm->tm_hour, tm->tm_min, tm->tm_sec);
|
||||||
|
|
||||||
if (tmp->tm_year < 2000) {
|
|
||||||
printf("RTC: year %d < 2000 not possible\n", tmp->tm_year);
|
if (tm->tm_year < 2000) {
|
||||||
return -1;
|
printf("%s: year %d (before 2000) not supported\n",
|
||||||
|
__func__, tm->tm_year);
|
||||||
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec);
|
|
||||||
buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min);
|
|
||||||
buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour);
|
|
||||||
/* set 24h format */
|
|
||||||
buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24;
|
|
||||||
buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday);
|
|
||||||
buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday);
|
|
||||||
buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon);
|
|
||||||
tmp->tm_year -= 2000;
|
|
||||||
buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year);
|
|
||||||
ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1,
|
|
||||||
buf, RTC_RV3029_PAGE_LEN);
|
|
||||||
|
|
||||||
/* give the RTC some time to update */
|
regs[RV3029_W_SEC - RV3029_W_SEC] = bin2bcd(tm->tm_sec);
|
||||||
udelay(1000);
|
regs[RV3029_W_MINUTES - RV3029_W_SEC] = bin2bcd(tm->tm_min);
|
||||||
return ret;
|
regs[RV3029_W_HOURS - RV3029_W_SEC] = bin2bcd(tm->tm_hour);
|
||||||
|
regs[RV3029_W_DATE - RV3029_W_SEC] = bin2bcd(tm->tm_mday);
|
||||||
|
regs[RV3029_W_MONTHS - RV3029_W_SEC] = bin2bcd(tm->tm_mon + 1);
|
||||||
|
regs[RV3029_W_DAYS - RV3029_W_SEC] = bin2bcd(tm->tm_wday + 1) & 0x7;
|
||||||
|
regs[RV3029_W_YEARS - RV3029_W_SEC] = bin2bcd(tm->tm_year - 2000);
|
||||||
|
|
||||||
|
return dm_i2c_write(dev, RV3029_W_SEC, regs, sizeof(regs));
|
||||||
}
|
}
|
||||||
|
|
||||||
/* sets EERE-Bit (automatic EEPROM refresh) */
|
static int rv3029_rtc_reset(struct udevice *dev)
|
||||||
static void set_eere_bit(int state)
|
|
||||||
{
|
{
|
||||||
unsigned char reg_ctrl1;
|
u8 ctrl = RV3029_RST_CTRL_SYSR;
|
||||||
|
unsigned long start;
|
||||||
|
const unsigned long timeout_ms = 10000;
|
||||||
|
int ret;
|
||||||
|
|
||||||
(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1,
|
/* trigger the system-reset */
|
||||||
®_ctrl1, 1);
|
ret = dm_i2c_write(dev, RV3029_RST_CTRL, &ctrl, 1);
|
||||||
|
if (ret < 0)
|
||||||
|
return -EIO;
|
||||||
|
|
||||||
if (state)
|
/* wait for the system-reset to complete */
|
||||||
reg_ctrl1 |= RTC_RV3029_CTRL1_EERE;
|
start = get_timer(0);
|
||||||
else
|
do {
|
||||||
reg_ctrl1 &= (~RTC_RV3029_CTRL1_EERE);
|
if (get_timer(start) > timeout_ms)
|
||||||
|
return -ETIMEDOUT;
|
||||||
|
|
||||||
(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1,
|
ret = dm_i2c_read(dev, RV3029_RST_CTRL, &ctrl, 1);
|
||||||
®_ctrl1, 1);
|
if (ret < 0)
|
||||||
|
return -EIO;
|
||||||
|
} while (ctrl & RV3029_RST_CTRL_SYSR);
|
||||||
|
|
||||||
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* waits until EEPROM page is no longer busy (times out after 10ms*loops) */
|
static int rv3029_rtc_read8(struct udevice *dev, unsigned int reg)
|
||||||
static int wait_eebusy(int loops)
|
|
||||||
{
|
{
|
||||||
int i;
|
u8 data;
|
||||||
unsigned char ctrl_status;
|
int ret;
|
||||||
|
|
||||||
for (i = 0; i < loops; i++) {
|
ret = dm_i2c_read(dev, reg, &data, sizeof(data));
|
||||||
(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_STATUS,
|
return ret < 0 ? ret : data;
|
||||||
1, &ctrl_status, 1);
|
}
|
||||||
|
|
||||||
if ((ctrl_status & RTC_RV3029_CTRLS_EEBUSY) == 0)
|
static int rv3029_rtc_write8(struct udevice *dev, unsigned int reg, int val)
|
||||||
|
{
|
||||||
|
u8 data = val;
|
||||||
|
|
||||||
|
return dm_i2c_write(dev, reg, &data, 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
#if defined(OF_CONTROL)
|
||||||
|
static int rv3029_get_sr(struct udevice *dev, u8 *buf)
|
||||||
|
{
|
||||||
|
int ret = dm_i2c_read(dev, RV3029_STATUS, buf, 1);
|
||||||
|
|
||||||
|
if (ret < 0)
|
||||||
|
return -EIO;
|
||||||
|
|
||||||
|
dev_dbg(dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int rv3029_set_sr(struct udevice *dev, u8 val)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = dm_i2c_read(dev, RV3029_STATUS, &val, 1);
|
||||||
|
if (ret < 0)
|
||||||
|
return -EIO;
|
||||||
|
|
||||||
|
dev_dbg(dev, "status = 0x%.2x (%d)\n", val, val);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int rv3029_eeprom_busywait(struct udevice *dev)
|
||||||
|
{
|
||||||
|
int i, ret;
|
||||||
|
u8 sr;
|
||||||
|
|
||||||
|
for (i = 100; i > 0; i--) {
|
||||||
|
ret = rv3029_get_sr(dev, &sr);
|
||||||
|
if (ret < 0)
|
||||||
|
break;
|
||||||
|
if (!(sr & RV3029_STATUS_EEBUSY))
|
||||||
break;
|
break;
|
||||||
udelay(10000);
|
udelay(10000);
|
||||||
}
|
}
|
||||||
return i;
|
if (i <= 0) {
|
||||||
}
|
dev_err(dev, "EEPROM busy wait timeout.\n");
|
||||||
|
return -ETIMEDOUT;
|
||||||
void rtc_reset (void)
|
|
||||||
{
|
|
||||||
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
||||||
|
|
||||||
buf[0] = RTC_RV3029_CTRL_SYS_R;
|
|
||||||
(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1,
|
|
||||||
buf, 1);
|
|
||||||
|
|
||||||
#if defined(CONFIG_SYS_RV3029_TCR)
|
|
||||||
/*
|
|
||||||
* because EEPROM_CTRL register is in EEPROM page it is necessary to
|
|
||||||
* disable automatic EEPROM refresh and check if EEPROM is busy
|
|
||||||
* before EEPORM_CTRL register may be accessed
|
|
||||||
*/
|
|
||||||
set_eere_bit(0);
|
|
||||||
wait_eebusy(100);
|
|
||||||
/* read current trickle charger setting */
|
|
||||||
(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_EEPROM_CTRL,
|
|
||||||
1, buf, 1);
|
|
||||||
/* enable automatic EEPROM refresh again */
|
|
||||||
set_eere_bit(1);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* to minimize EEPROM access write trickle charger setting only if it
|
|
||||||
* differs from current value
|
|
||||||
*/
|
|
||||||
if ((buf[0] & 0xF0) != CONFIG_SYS_RV3029_TCR) {
|
|
||||||
buf[0] = (buf[0] & 0x0F) | CONFIG_SYS_RV3029_TCR;
|
|
||||||
/*
|
|
||||||
* write trickle charger setting (disable autom. EEPROM
|
|
||||||
* refresh and wait until EEPROM is idle)
|
|
||||||
*/
|
|
||||||
set_eere_bit(0);
|
|
||||||
wait_eebusy(100);
|
|
||||||
(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR,
|
|
||||||
RTC_RV3029_EEPROM_CTRL, 1, buf, 1);
|
|
||||||
/*
|
|
||||||
* it is necessary to wait 10ms before EEBUSY-Bit may be read
|
|
||||||
* (this is not documented in the data sheet yet, but the
|
|
||||||
* manufacturer recommends it)
|
|
||||||
*/
|
|
||||||
udelay(10000);
|
|
||||||
/* wait until EEPROM write access is finished */
|
|
||||||
wait_eebusy(100);
|
|
||||||
set_eere_bit(1);
|
|
||||||
}
|
}
|
||||||
#endif
|
|
||||||
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int rv3029_update_bits(struct udevice *dev, u8 reg, u8 mask, u8 set)
|
||||||
|
{
|
||||||
|
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_OSCILLATOR
|
||||||
CONFIG_SYS_RTC_REG_BASE_ADDR
|
CONFIG_SYS_RTC_REG_BASE_ADDR
|
||||||
CONFIG_SYS_RTC_SETUP
|
CONFIG_SYS_RTC_SETUP
|
||||||
CONFIG_SYS_RV3029_TCR
|
|
||||||
CONFIG_SYS_RX_ETH_BUFFER
|
CONFIG_SYS_RX_ETH_BUFFER
|
||||||
CONFIG_SYS_SATA
|
CONFIG_SYS_SATA
|
||||||
CONFIG_SYS_SATA1
|
CONFIG_SYS_SATA1
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user