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Merge tag 'rtc-max77686-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into next/defconfig 

Keep RTC functionality on defconfigs for Chromebook Peach intact after
combining the max77802 RTC driver into max77686.
hifive-unleashed-5.1
Krzysztof Kozlowski 2016-02-05 09:01:49 +09:00
parent 2c658a7300 bf035f4234
commit 9276599d3b
4 changed files with 278 additions and 599 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/rtc/Kconfig
View File

@ -335,16 +335,6 @@ config RTC_DRV_RK808
This driver can also be built as a module. If so, the module
will be called rk808-rtc.
config RTC_DRV_MAX77802
tristate "Maxim 77802 RTC"
depends on MFD_MAX77686
help
If you say yes here you will get support for the
RTC of Maxim MAX77802 PMIC.
This driver can also be built as a module. If so, the module
will be called rtc-max77802.
config RTC_DRV_RS5C372
tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
help

1
drivers/rtc/Makefile
View File

@ -86,7 +86,6 @@ obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o
obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o
obj-$(CONFIG_RTC_DRV_MAX8907) += rtc-max8907.o
obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o
obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o

364
drivers/rtc/rtc-max77686.c
View File

@ -1,5 +1,5 @@
/*
* RTC driver for Maxim MAX77686
* RTC driver for Maxim MAX77686 and MAX77802
*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
*
@ -12,8 +12,6 @@
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/slab.h>
#include <linux/rtc.h>
#include <linux/delay.h>
@ -41,7 +39,14 @@
#define ALARM_ENABLE_SHIFT 7
#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
#define MAX77686_RTC_UPDATE_DELAY 16
#define REG_RTC_NONE 0xdeadbeef
/*
* MAX77802 has separate register (RTCAE1) for alarm enable instead
* using 1 bit from registers RTC{SEC,MIN,HOUR,DAY,MONTH,YEAR,DATE}
* as in done in MAX77686.
*/
#define MAX77802_ALARM_ENABLE_VALUE 0x77
enum {
RTC_SEC = 0,
@ -54,6 +59,19 @@ enum {
RTC_NR_TIME
};
struct max77686_rtc_driver_data {
/* Minimum usecs needed for a RTC update */
unsigned long delay;
/* Mask used to read RTC registers value */
u8 mask;
/* Registers offset to I2C addresses map */
const unsigned int *map;
/* Has a separate alarm enable register? */
bool alarm_enable_reg;
/* Has a separate I2C regmap for the RTC? */
bool separate_i2c_addr;
};
struct max77686_rtc_info {
struct device *dev;
struct max77686_dev *max77686;
@ -63,6 +81,8 @@ struct max77686_rtc_info {
struct regmap *regmap;
const struct max77686_rtc_driver_data *drv_data;
int virq;
int rtc_24hr_mode;
};
@ -72,12 +92,120 @@ enum MAX77686_RTC_OP {
MAX77686_RTC_READ,
};
/* These are not registers but just offsets that are mapped to addresses */
enum max77686_rtc_reg_offset {
REG_RTC_CONTROLM = 0,
REG_RTC_CONTROL,
REG_RTC_UPDATE0,
REG_WTSR_SMPL_CNTL,
REG_RTC_SEC,
REG_RTC_MIN,
REG_RTC_HOUR,
REG_RTC_WEEKDAY,
REG_RTC_MONTH,
REG_RTC_YEAR,
REG_RTC_DATE,
REG_ALARM1_SEC,
REG_ALARM1_MIN,
REG_ALARM1_HOUR,
REG_ALARM1_WEEKDAY,
REG_ALARM1_MONTH,
REG_ALARM1_YEAR,
REG_ALARM1_DATE,
REG_ALARM2_SEC,
REG_ALARM2_MIN,
REG_ALARM2_HOUR,
REG_ALARM2_WEEKDAY,
REG_ALARM2_MONTH,
REG_ALARM2_YEAR,
REG_ALARM2_DATE,
REG_RTC_AE1,
REG_RTC_END,
};
/* Maps RTC registers offset to the MAX77686 register addresses */
static const unsigned int max77686_map[REG_RTC_END] = {
[REG_RTC_CONTROLM] = MAX77686_RTC_CONTROLM,
[REG_RTC_CONTROL] = MAX77686_RTC_CONTROL,
[REG_RTC_UPDATE0] = MAX77686_RTC_UPDATE0,
[REG_WTSR_SMPL_CNTL] = MAX77686_WTSR_SMPL_CNTL,
[REG_RTC_SEC] = MAX77686_RTC_SEC,
[REG_RTC_MIN] = MAX77686_RTC_MIN,
[REG_RTC_HOUR] = MAX77686_RTC_HOUR,
[REG_RTC_WEEKDAY] = MAX77686_RTC_WEEKDAY,
[REG_RTC_MONTH] = MAX77686_RTC_MONTH,
[REG_RTC_YEAR] = MAX77686_RTC_YEAR,
[REG_RTC_DATE] = MAX77686_RTC_DATE,
[REG_ALARM1_SEC] = MAX77686_ALARM1_SEC,
[REG_ALARM1_MIN] = MAX77686_ALARM1_MIN,
[REG_ALARM1_HOUR] = MAX77686_ALARM1_HOUR,
[REG_ALARM1_WEEKDAY] = MAX77686_ALARM1_WEEKDAY,
[REG_ALARM1_MONTH] = MAX77686_ALARM1_MONTH,
[REG_ALARM1_YEAR] = MAX77686_ALARM1_YEAR,
[REG_ALARM1_DATE] = MAX77686_ALARM1_DATE,
[REG_ALARM2_SEC] = MAX77686_ALARM2_SEC,
[REG_ALARM2_MIN] = MAX77686_ALARM2_MIN,
[REG_ALARM2_HOUR] = MAX77686_ALARM2_HOUR,
[REG_ALARM2_WEEKDAY] = MAX77686_ALARM2_WEEKDAY,
[REG_ALARM2_MONTH] = MAX77686_ALARM2_MONTH,
[REG_ALARM2_YEAR] = MAX77686_ALARM2_YEAR,
[REG_ALARM2_DATE] = MAX77686_ALARM2_DATE,
[REG_RTC_AE1] = REG_RTC_NONE,
};
static const struct max77686_rtc_driver_data max77686_drv_data = {
.delay = 16000,
.mask = 0x7f,
.map = max77686_map,
.alarm_enable_reg = false,
.separate_i2c_addr = true,
};
static const unsigned int max77802_map[REG_RTC_END] = {
[REG_RTC_CONTROLM] = MAX77802_RTC_CONTROLM,
[REG_RTC_CONTROL] = MAX77802_RTC_CONTROL,
[REG_RTC_UPDATE0] = MAX77802_RTC_UPDATE0,
[REG_WTSR_SMPL_CNTL] = MAX77802_WTSR_SMPL_CNTL,
[REG_RTC_SEC] = MAX77802_RTC_SEC,
[REG_RTC_MIN] = MAX77802_RTC_MIN,
[REG_RTC_HOUR] = MAX77802_RTC_HOUR,
[REG_RTC_WEEKDAY] = MAX77802_RTC_WEEKDAY,
[REG_RTC_MONTH] = MAX77802_RTC_MONTH,
[REG_RTC_YEAR] = MAX77802_RTC_YEAR,
[REG_RTC_DATE] = MAX77802_RTC_DATE,
[REG_ALARM1_SEC] = MAX77802_ALARM1_SEC,
[REG_ALARM1_MIN] = MAX77802_ALARM1_MIN,
[REG_ALARM1_HOUR] = MAX77802_ALARM1_HOUR,
[REG_ALARM1_WEEKDAY] = MAX77802_ALARM1_WEEKDAY,
[REG_ALARM1_MONTH] = MAX77802_ALARM1_MONTH,
[REG_ALARM1_YEAR] = MAX77802_ALARM1_YEAR,
[REG_ALARM1_DATE] = MAX77802_ALARM1_DATE,
[REG_ALARM2_SEC] = MAX77802_ALARM2_SEC,
[REG_ALARM2_MIN] = MAX77802_ALARM2_MIN,
[REG_ALARM2_HOUR] = MAX77802_ALARM2_HOUR,
[REG_ALARM2_WEEKDAY] = MAX77802_ALARM2_WEEKDAY,
[REG_ALARM2_MONTH] = MAX77802_ALARM2_MONTH,
[REG_ALARM2_YEAR] = MAX77802_ALARM2_YEAR,
[REG_ALARM2_DATE] = MAX77802_ALARM2_DATE,
[REG_RTC_AE1] = MAX77802_RTC_AE1,
};
static const struct max77686_rtc_driver_data max77802_drv_data = {
.delay = 200,
.mask = 0xff,
.map = max77802_map,
.alarm_enable_reg = true,
.separate_i2c_addr = false,
};
static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
int rtc_24hr_mode)
struct max77686_rtc_info *info)
{
tm->tm_sec = data[RTC_SEC] & 0x7f;
tm->tm_min = data[RTC_MIN] & 0x7f;
if (rtc_24hr_mode)
u8 mask = info->drv_data->mask;
tm->tm_sec = data[RTC_SEC] & mask;
tm->tm_min = data[RTC_MIN] & mask;
if (info->rtc_24hr_mode)
tm->tm_hour = data[RTC_HOUR] & 0x1f;
else {
tm->tm_hour = data[RTC_HOUR] & 0x0f;
@ -86,15 +214,23 @@ static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
}
/* Only a single bit is set in data[], so fls() would be equivalent */
tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f) - 1;
tm->tm_wday = ffs(data[RTC_WEEKDAY] & mask) - 1;
tm->tm_mday = data[RTC_DATE] & 0x1f;
tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100;
tm->tm_year = data[RTC_YEAR] & mask;
tm->tm_yday = 0;
tm->tm_isdst = 0;
/*
* MAX77686 uses 1 bit from sec/min/hour/etc RTC registers and the
* year values are just 0..99 so add 100 to support up to 2099.
*/
if (!info->drv_data->alarm_enable_reg)
tm->tm_year += 100;
}
static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data)
static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data,
struct max77686_rtc_info *info)
{
data[RTC_SEC] = tm->tm_sec;
data[RTC_MIN] = tm->tm_min;
@ -102,13 +238,20 @@ static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data)
data[RTC_WEEKDAY] = 1 << tm->tm_wday;
data[RTC_DATE] = tm->tm_mday;
data[RTC_MONTH] = tm->tm_mon + 1;
if (info->drv_data->alarm_enable_reg) {
data[RTC_YEAR] = tm->tm_year;
return 0;
}
data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;
if (tm->tm_year < 100) {
pr_warn("RTC cannot handle the year %d. Assume it's 2000.\n",
dev_err(info->dev, "RTC cannot handle the year %d.\n",
1900 + tm->tm_year);
return -EINVAL;
}
return 0;
}
@ -117,6 +260,7 @@ static int max77686_rtc_update(struct max77686_rtc_info *info,
{
int ret;
unsigned int data;
unsigned long delay = info->drv_data->delay;
if (op == MAX77686_RTC_WRITE)
data = 1 << RTC_UDR_SHIFT;
@ -124,13 +268,14 @@ static int max77686_rtc_update(struct max77686_rtc_info *info,
data = 1 << RTC_RBUDR_SHIFT;
ret = regmap_update_bits(info->max77686->rtc_regmap,
MAX77686_RTC_UPDATE0, data, data);
info->drv_data->map[REG_RTC_UPDATE0],
data, data);
if (ret < 0)
dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n",
__func__, ret, data);
dev_err(info->dev, "Fail to write update reg(ret=%d, data=0x%x)\n",
ret, data);
else {
/* Minimum 16ms delay required before RTC update. */
msleep(MAX77686_RTC_UPDATE_DELAY);
/* Minimum delay required before RTC update. */
usleep_range(delay, delay * 2);
}
return ret;
@ -149,13 +294,14 @@ static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
MAX77686_RTC_SEC, data, RTC_NR_TIME);
info->drv_data->map[REG_RTC_SEC],
data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret);
dev_err(info->dev, "Fail to read time reg(%d)\n", ret);
goto out;
}
max77686_rtc_data_to_tm(data, tm, info->rtc_24hr_mode);
max77686_rtc_data_to_tm(data, tm, info);
ret = rtc_valid_tm(tm);
@ -170,17 +316,17 @@ static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm)
u8 data[RTC_NR_TIME];
int ret;
ret = max77686_rtc_tm_to_data(tm, data);
ret = max77686_rtc_tm_to_data(tm, data, info);
if (ret < 0)
return ret;
mutex_lock(&info->lock);
ret = regmap_bulk_write(info->max77686->rtc_regmap,
MAX77686_RTC_SEC, data, RTC_NR_TIME);
info->drv_data->map[REG_RTC_SEC],
data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
ret);
dev_err(info->dev, "Fail to write time reg(%d)\n", ret);
goto out;
}
@ -196,6 +342,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct max77686_rtc_info *info = dev_get_drvdata(dev);
u8 data[RTC_NR_TIME];
unsigned int val;
const unsigned int *map = info->drv_data->map;
int i, ret;
mutex_lock(&info->lock);
@ -205,28 +352,47 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
__func__, __LINE__, ret);
dev_err(info->dev, "Fail to read alarm reg(%d)\n", ret);
goto out;
}
max77686_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
max77686_rtc_data_to_tm(data, &alrm->time, info);
alrm->enabled = 0;
for (i = 0; i < RTC_NR_TIME; i++) {
if (data[i] & ALARM_ENABLE_MASK) {
if (info->drv_data->alarm_enable_reg) {
if (map[REG_RTC_AE1] == REG_RTC_NONE) {
ret = -EINVAL;
dev_err(info->dev,
"alarm enable register not set(%d)\n", ret);
goto out;
}
ret = regmap_read(info->max77686->regmap,
map[REG_RTC_AE1], &val);
if (ret < 0) {
dev_err(info->dev,
"fail to read alarm enable(%d)\n", ret);
goto out;
}
if (val)
alrm->enabled = 1;
break;
} else {
for (i = 0; i < ARRAY_SIZE(data); i++) {
if (data[i] & ALARM_ENABLE_MASK) {
alrm->enabled = 1;
break;
}
}
}
alrm->pending = 0;
ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS2, &val);
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read status2 reg(%d)\n",
__func__, __LINE__, ret);
dev_err(info->dev, "Fail to read status2 reg(%d)\n", ret);
goto out;
}
@ -235,7 +401,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
out:
mutex_unlock(&info->lock);
return 0;
return ret;
}
static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
@ -243,6 +409,7 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
u8 data[RTC_NR_TIME];
int ret, i;
struct rtc_time tm;
const unsigned int *map = info->drv_data->map;
if (!mutex_is_locked(&info->lock))
dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
@ -251,24 +418,36 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
if (ret < 0)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
goto out;
if (info->drv_data->alarm_enable_reg) {
if (map[REG_RTC_AE1] == REG_RTC_NONE) {
ret = -EINVAL;
dev_err(info->dev,
"alarm enable register not set(%d)\n", ret);
goto out;
}
ret = regmap_write(info->max77686->regmap, map[REG_RTC_AE1], 0);
} else {
ret = regmap_bulk_read(info->max77686->rtc_regmap,
map[REG_ALARM1_SEC], data,
ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "Fail to read alarm reg(%d)\n", ret);
goto out;
}
max77686_rtc_data_to_tm(data, &tm, info);
for (i = 0; i < ARRAY_SIZE(data); i++)
data[i] &= ~ALARM_ENABLE_MASK;
ret = regmap_bulk_write(info->max77686->rtc_regmap,
map[REG_ALARM1_SEC], data,
ARRAY_SIZE(data));
}
max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode);
for (i = 0; i < RTC_NR_TIME; i++)
data[i] &= ~ALARM_ENABLE_MASK;
ret = regmap_bulk_write(info->max77686->rtc_regmap,
MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
dev_err(info->dev, "Fail to write alarm reg(%d)\n", ret);
goto out;
}
@ -282,6 +461,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
u8 data[RTC_NR_TIME];
int ret;
struct rtc_time tm;
const unsigned int *map = info->drv_data->map;
if (!mutex_is_locked(&info->lock))
dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
@ -290,32 +470,38 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
if (ret < 0)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
goto out;
if (info->drv_data->alarm_enable_reg) {
ret = regmap_write(info->max77686->regmap, map[REG_RTC_AE1],
MAX77802_ALARM_ENABLE_VALUE);
} else {
ret = regmap_bulk_read(info->max77686->rtc_regmap,
map[REG_ALARM1_SEC], data,
ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "Fail to read alarm reg(%d)\n", ret);
goto out;
}
max77686_rtc_data_to_tm(data, &tm, info);
data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT);
data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT);
data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT);
data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
if (data[RTC_MONTH] & 0xf)
data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT);
if (data[RTC_YEAR] & info->drv_data->mask)
data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT);
if (data[RTC_DATE] & 0x1f)
data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT);
ret = regmap_bulk_write(info->max77686->rtc_regmap,
map[REG_ALARM1_SEC], data,
ARRAY_SIZE(data));
}
max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode);
data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT);
data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT);
data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT);
data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
if (data[RTC_MONTH] & 0xf)
data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT);
if (data[RTC_YEAR] & 0x7f)
data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT);
if (data[RTC_DATE] & 0x1f)
data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT);
ret = regmap_bulk_write(info->max77686->rtc_regmap,
MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
dev_err(info->dev, "Fail to write alarm reg(%d)\n", ret);
goto out;
}
@ -330,7 +516,7 @@ static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
u8 data[RTC_NR_TIME];
int ret;
ret = max77686_rtc_tm_to_data(&alrm->time, data);
ret = max77686_rtc_tm_to_data(&alrm->time, data, info);
if (ret < 0)
return ret;
@ -341,11 +527,11 @@ static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
goto out;
ret = regmap_bulk_write(info->max77686->rtc_regmap,
MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
info->drv_data->map[REG_ALARM1_SEC],
data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
dev_err(info->dev, "Fail to write alarm reg(%d)\n", ret);
goto out;
}
@ -380,7 +566,7 @@ static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data)
{
struct max77686_rtc_info *info = data;
dev_info(info->dev, "%s:irq(%d)\n", __func__, irq);
dev_dbg(info->dev, "RTC alarm IRQ: %d\n", irq);
rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
@ -406,10 +592,11 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
info->rtc_24hr_mode = 1;
ret = regmap_bulk_write(info->max77686->rtc_regmap, MAX77686_RTC_CONTROLM, data, 2);
ret = regmap_bulk_write(info->max77686->rtc_regmap,
info->drv_data->map[REG_RTC_CONTROLM],
data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
__func__, ret);
dev_err(info->dev, "Fail to write controlm reg(%d)\n", ret);
return ret;
}
@ -421,10 +608,9 @@ static int max77686_rtc_probe(struct platform_device *pdev)
{
struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent);
struct max77686_rtc_info *info;
const struct platform_device_id *id = platform_get_device_id(pdev);
int ret;
dev_info(&pdev->dev, "%s\n", __func__);
info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info),
GFP_KERNEL);
if (!info)
@ -434,6 +620,11 @@ static int max77686_rtc_probe(struct platform_device *pdev)
info->dev = &pdev->dev;
info->max77686 = max77686;
info->rtc = max77686->rtc;
info->drv_data = (const struct max77686_rtc_driver_data *)
id->driver_data;
if (!info->drv_data->separate_i2c_addr)
info->max77686->rtc_regmap = info->max77686->regmap;
platform_set_drvdata(pdev, info);
@ -446,7 +637,7 @@ static int max77686_rtc_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 1);
info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc",
info->rtc_dev = devm_rtc_device_register(&pdev->dev, id->name,
&max77686_rtc_ops, THIS_MODULE);
if (IS_ERR(info->rtc_dev)) {
@ -459,13 +650,13 @@ static int max77686_rtc_probe(struct platform_device *pdev)
if (!max77686->rtc_irq_data) {
ret = -EINVAL;
dev_err(&pdev->dev, "%s: no RTC regmap IRQ chip\n", __func__);
dev_err(&pdev->dev, "No RTC regmap IRQ chip\n");
goto err_rtc;
}
info->virq = regmap_irq_get_virq(max77686->rtc_irq_data,
MAX77686_RTCIRQ_RTCA1);
if (!info->virq) {
if (info->virq <= 0) {
ret = -ENXIO;
goto err_rtc;
}
@ -508,7 +699,8 @@ static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops,
max77686_rtc_suspend, max77686_rtc_resume);
static const struct platform_device_id rtc_id[] = {
{ "max77686-rtc", 0 },
{ "max77686-rtc", .driver_data = (kernel_ulong_t)&max77686_drv_data, },
{ "max77802-rtc", .driver_data = (kernel_ulong_t)&max77802_drv_data, },
{},
};
MODULE_DEVICE_TABLE(platform, rtc_id);

502
drivers/rtc/rtc-max77802.c
View File

@ -1,502 +0,0 @@
/*
* RTC driver for Maxim MAX77802
*
* Copyright (C) 2013 Google, Inc
*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
*
* based on rtc-max8997.c
*
* 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.
*
*/
#include <linux/slab.h>
#include <linux/rtc.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mfd/max77686-private.h>
#include <linux/irqdomain.h>
#include <linux/regmap.h>
/* RTC Control Register */
#define BCD_EN_SHIFT 0
#define BCD_EN_MASK (1 << BCD_EN_SHIFT)
#define MODEL24_SHIFT 1
#define MODEL24_MASK (1 << MODEL24_SHIFT)
/* RTC Update Register1 */
#define RTC_UDR_SHIFT 0
#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT)
#define RTC_RBUDR_SHIFT 4
#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT)
/* RTC Hour register */
#define HOUR_PM_SHIFT 6
#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT)
/* RTC Alarm Enable */
#define ALARM_ENABLE_SHIFT 7
#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
/* For the RTCAE1 register, we write this value to enable the alarm */
#define ALARM_ENABLE_VALUE 0x77
#define MAX77802_RTC_UPDATE_DELAY_US 200
enum {
RTC_SEC = 0,
RTC_MIN,
RTC_HOUR,
RTC_WEEKDAY,
RTC_MONTH,
RTC_YEAR,
RTC_DATE,
RTC_NR_TIME
};
struct max77802_rtc_info {
struct device *dev;
struct max77686_dev *max77802;
struct i2c_client *rtc;
struct rtc_device *rtc_dev;
struct mutex lock;
struct regmap *regmap;
int virq;
int rtc_24hr_mode;
};
enum MAX77802_RTC_OP {
MAX77802_RTC_WRITE,
MAX77802_RTC_READ,
};
static void max77802_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
int rtc_24hr_mode)
{
tm->tm_sec = data[RTC_SEC] & 0xff;
tm->tm_min = data[RTC_MIN] & 0xff;
if (rtc_24hr_mode)
tm->tm_hour = data[RTC_HOUR] & 0x1f;
else {
tm->tm_hour = data[RTC_HOUR] & 0x0f;
if (data[RTC_HOUR] & HOUR_PM_MASK)
tm->tm_hour += 12;
}
/* Only a single bit is set in data[], so fls() would be equivalent */
tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0xff) - 1;
tm->tm_mday = data[RTC_DATE] & 0x1f;
tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
tm->tm_year = data[RTC_YEAR] & 0xff;
tm->tm_yday = 0;
tm->tm_isdst = 0;
}
static int max77802_rtc_tm_to_data(struct rtc_time *tm, u8 *data)
{
data[RTC_SEC] = tm->tm_sec;
data[RTC_MIN] = tm->tm_min;
data[RTC_HOUR] = tm->tm_hour;
data[RTC_WEEKDAY] = 1 << tm->tm_wday;
data[RTC_DATE] = tm->tm_mday;
data[RTC_MONTH] = tm->tm_mon + 1;
data[RTC_YEAR] = tm->tm_year;
return 0;
}
static int max77802_rtc_update(struct max77802_rtc_info *info,
enum MAX77802_RTC_OP op)
{
int ret;
unsigned int data;
if (op == MAX77802_RTC_WRITE)
data = 1 << RTC_UDR_SHIFT;
else
data = 1 << RTC_RBUDR_SHIFT;
ret = regmap_update_bits(info->max77802->regmap,
MAX77802_RTC_UPDATE0, data, data);
if (ret < 0)
dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n",
__func__, ret, data);
else {
/* Minimum delay required before RTC update. */
usleep_range(MAX77802_RTC_UPDATE_DELAY_US,
MAX77802_RTC_UPDATE_DELAY_US * 2);
}
return ret;
}
static int max77802_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct max77802_rtc_info *info = dev_get_drvdata(dev);
u8 data[RTC_NR_TIME];
int ret;
mutex_lock(&info->lock);
ret = max77802_rtc_update(info, MAX77802_RTC_READ);
if (ret < 0)
goto out;
ret = regmap_bulk_read(info->max77802->regmap,
MAX77802_RTC_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__,
ret);
goto out;
}
max77802_rtc_data_to_tm(data, tm, info->rtc_24hr_mode);
ret = rtc_valid_tm(tm);
out:
mutex_unlock(&info->lock);
return ret;
}
static int max77802_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct max77802_rtc_info *info = dev_get_drvdata(dev);
u8 data[RTC_NR_TIME];
int ret;
ret = max77802_rtc_tm_to_data(tm, data);
if (ret < 0)
return ret;
mutex_lock(&info->lock);
ret = regmap_bulk_write(info->max77802->regmap,
MAX77802_RTC_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
ret);
goto out;
}
ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
out:
mutex_unlock(&info->lock);
return ret;
}
static int max77802_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct max77802_rtc_info *info = dev_get_drvdata(dev);
u8 data[RTC_NR_TIME];
unsigned int val;
int ret;
mutex_lock(&info->lock);
ret = max77802_rtc_update(info, MAX77802_RTC_READ);
if (ret < 0)
goto out;
ret = regmap_bulk_read(info->max77802->regmap,
MAX77802_ALARM1_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
__func__, __LINE__, ret);
goto out;
}
max77802_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
alrm->enabled = 0;
ret = regmap_read(info->max77802->regmap,
MAX77802_RTC_AE1, &val);
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read alarm enable(%d)\n",
__func__, __LINE__, ret);
goto out;
}
if (val)
alrm->enabled = 1;
alrm->pending = 0;
ret = regmap_read(info->max77802->regmap, MAX77802_REG_STATUS2, &val);
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read status2 reg(%d)\n",
__func__, __LINE__, ret);
goto out;
}
if (val & (1 << 2)) /* RTCA1 */
alrm->pending = 1;
out:
mutex_unlock(&info->lock);
return 0;
}
static int max77802_rtc_stop_alarm(struct max77802_rtc_info *info)
{
int ret;
if (!mutex_is_locked(&info->lock))
dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
ret = max77802_rtc_update(info, MAX77802_RTC_READ);
if (ret < 0)
goto out;
ret = regmap_write(info->max77802->regmap,
MAX77802_RTC_AE1, 0);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
goto out;
}
ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
out:
return ret;
}
static int max77802_rtc_start_alarm(struct max77802_rtc_info *info)
{
int ret;
if (!mutex_is_locked(&info->lock))
dev_warn(info->dev, "%s: should have mutex locked\n",
__func__);
ret = max77802_rtc_update(info, MAX77802_RTC_READ);
if (ret < 0)
goto out;
ret = regmap_write(info->max77802->regmap,
MAX77802_RTC_AE1,
ALARM_ENABLE_VALUE);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
goto out;
}
ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
out:
return ret;
}
static int max77802_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct max77802_rtc_info *info = dev_get_drvdata(dev);
u8 data[RTC_NR_TIME];
int ret;
ret = max77802_rtc_tm_to_data(&alrm->time, data);
if (ret < 0)
return ret;
mutex_lock(&info->lock);
ret = max77802_rtc_stop_alarm(info);
if (ret < 0)
goto out;
ret = regmap_bulk_write(info->max77802->regmap,
MAX77802_ALARM1_SEC, data, RTC_NR_TIME);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
goto out;
}
ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
if (ret < 0)
goto out;
if (alrm->enabled)
ret = max77802_rtc_start_alarm(info);
out:
mutex_unlock(&info->lock);
return ret;
}
static int max77802_rtc_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
struct max77802_rtc_info *info = dev_get_drvdata(dev);
int ret;
mutex_lock(&info->lock);
if (enabled)
ret = max77802_rtc_start_alarm(info);
else
ret = max77802_rtc_stop_alarm(info);
mutex_unlock(&info->lock);
return ret;
}
static irqreturn_t max77802_rtc_alarm_irq(int irq, void *data)
{
struct max77802_rtc_info *info = data;
dev_dbg(info->dev, "%s:irq(%d)\n", __func__, irq);
rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
return IRQ_HANDLED;
}
static const struct rtc_class_ops max77802_rtc_ops = {
.read_time = max77802_rtc_read_time,
.set_time = max77802_rtc_set_time,
.read_alarm = max77802_rtc_read_alarm,
.set_alarm = max77802_rtc_set_alarm,
.alarm_irq_enable = max77802_rtc_alarm_irq_enable,
};
static int max77802_rtc_init_reg(struct max77802_rtc_info *info)
{
u8 data[2];
int ret;
max77802_rtc_update(info, MAX77802_RTC_READ);
/* Set RTC control register : Binary mode, 24hour mdoe */
data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
info->rtc_24hr_mode = 1;
ret = regmap_bulk_write(info->max77802->regmap,
MAX77802_RTC_CONTROLM, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
__func__, ret);
return ret;
}
ret = max77802_rtc_update(info, MAX77802_RTC_WRITE);
return ret;
}
static int max77802_rtc_probe(struct platform_device *pdev)
{
struct max77686_dev *max77802 = dev_get_drvdata(pdev->dev.parent);
struct max77802_rtc_info *info;
int ret;
dev_dbg(&pdev->dev, "%s\n", __func__);
info = devm_kzalloc(&pdev->dev, sizeof(struct max77802_rtc_info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
mutex_init(&info->lock);
info->dev = &pdev->dev;
info->max77802 = max77802;
info->rtc = max77802->i2c;
platform_set_drvdata(pdev, info);
ret = max77802_rtc_init_reg(info);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret);
return ret;
}
device_init_wakeup(&pdev->dev, 1);
info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77802-rtc",
&max77802_rtc_ops, THIS_MODULE);
if (IS_ERR(info->rtc_dev)) {
ret = PTR_ERR(info->rtc_dev);
dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
if (ret == 0)
ret = -EINVAL;
return ret;
}
if (!max77802->rtc_irq_data) {
dev_err(&pdev->dev, "No RTC regmap IRQ chip\n");
return -EINVAL;
}
info->virq = regmap_irq_get_virq(max77802->rtc_irq_data,
MAX77686_RTCIRQ_RTCA1);
if (info->virq <= 0) {
dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
MAX77686_RTCIRQ_RTCA1);
return -EINVAL;
}
ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL,
max77802_rtc_alarm_irq, 0, "rtc-alarm1",
info);
if (ret < 0)
dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
info->virq, ret);
return ret;
}
#ifdef CONFIG_PM_SLEEP
static int max77802_rtc_suspend(struct device *dev)
{
if (device_may_wakeup(dev)) {
struct max77802_rtc_info *info = dev_get_drvdata(dev);
return enable_irq_wake(info->virq);
}
return 0;
}
static int max77802_rtc_resume(struct device *dev)
{
if (device_may_wakeup(dev)) {
struct max77802_rtc_info *info = dev_get_drvdata(dev);
return disable_irq_wake(info->virq);
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(max77802_rtc_pm_ops,
max77802_rtc_suspend, max77802_rtc_resume);
static const struct platform_device_id rtc_id[] = {
{ "max77802-rtc", 0 },
{},
};
MODULE_DEVICE_TABLE(platform, rtc_id);
static struct platform_driver max77802_rtc_driver = {
.driver = {
.name = "max77802-rtc",
.pm = &max77802_rtc_pm_ops,
},
.probe = max77802_rtc_probe,
.id_table = rtc_id,
};
module_platform_driver(max77802_rtc_driver);
MODULE_DESCRIPTION("Maxim MAX77802 RTC driver");
MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
MODULE_LICENSE("GPL");