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-rw-r--r--drivers/rtc/Kconfig10
-rw-r--r--drivers/rtc/Makefile1
-rw-r--r--drivers/rtc/lib_test.c33
-rw-r--r--drivers/rtc/rtc-cros-ec.c9
-rw-r--r--drivers/rtc/rtc-mcp795.c1
-rw-r--r--drivers/rtc/rtc-nct3018y.c15
-rw-r--r--drivers/rtc/rtc-pcf8563.c9
-rw-r--r--drivers/rtc/rtc-rx6110.c4
-rw-r--r--drivers/rtc/rtc-rx8111.c368
9 files changed, 431 insertions, 19 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index c63e32d012f2..2a95b05982ad 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -664,6 +664,16 @@ config RTC_DRV_RX8010
This driver can also be built as a module. If so, the module
will be called rtc-rx8010.
+config RTC_DRV_RX8111
+ tristate "Epson RX8111"
+ select REGMAP_I2C
+ depends on I2C
+ help
+ If you say yes here you will get support for the Epson RX8111 RTC.
+
+ This driver can also be built as a module. If so, the module will be
+ called rtc-rx8111.
+
config RTC_DRV_RX8581
tristate "Epson RX-8571/RX-8581"
select REGMAP_I2C
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 6efff381c484..3004e372f25f 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -154,6 +154,7 @@ obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o
obj-$(CONFIG_RTC_DRV_RX6110) += rtc-rx6110.o
obj-$(CONFIG_RTC_DRV_RX8010) += rtc-rx8010.o
obj-$(CONFIG_RTC_DRV_RX8025) += rtc-rx8025.o
+obj-$(CONFIG_RTC_DRV_RX8111) += rtc-rx8111.o
obj-$(CONFIG_RTC_DRV_RX8581) += rtc-rx8581.o
obj-$(CONFIG_RTC_DRV_RZN1) += rtc-rzn1.o
obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o
diff --git a/drivers/rtc/lib_test.c b/drivers/rtc/lib_test.c
index 225c859d6da5..3893a202e9ea 100644
--- a/drivers/rtc/lib_test.c
+++ b/drivers/rtc/lib_test.c
@@ -27,17 +27,17 @@ static void advance_date(int *year, int *month, int *mday, int *yday)
}
/*
- * Checks every day in a 160000 years interval starting on 1970-01-01
+ * Check every day in specified number of years interval starting on 1970-01-01
* against the expected result.
*/
-static void rtc_time64_to_tm_test_date_range(struct kunit *test)
+static void rtc_time64_to_tm_test_date_range(struct kunit *test, int years)
{
/*
- * 160000 years = (160000 / 400) * 400 years
- * = (160000 / 400) * 146097 days
- * = (160000 / 400) * 146097 * 86400 seconds
+ * years = (years / 400) * 400 years
+ * = (years / 400) * 146097 days
+ * = (years / 400) * 146097 * 86400 seconds
*/
- time64_t total_secs = ((time64_t) 160000) / 400 * 146097 * 86400;
+ time64_t total_secs = ((time64_t)years) / 400 * 146097 * 86400;
int year = 1970;
int month = 1;
@@ -66,8 +66,27 @@ static void rtc_time64_to_tm_test_date_range(struct kunit *test)
}
}
+/*
+ * Checks every day in a 160000 years interval starting on 1970-01-01
+ * against the expected result.
+ */
+static void rtc_time64_to_tm_test_date_range_160000(struct kunit *test)
+{
+ rtc_time64_to_tm_test_date_range(test, 160000);
+}
+
+/*
+ * Checks every day in a 1000 years interval starting on 1970-01-01
+ * against the expected result.
+ */
+static void rtc_time64_to_tm_test_date_range_1000(struct kunit *test)
+{
+ rtc_time64_to_tm_test_date_range(test, 1000);
+}
+
static struct kunit_case rtc_lib_test_cases[] = {
- KUNIT_CASE(rtc_time64_to_tm_test_date_range),
+ KUNIT_CASE(rtc_time64_to_tm_test_date_range_1000),
+ KUNIT_CASE_SLOW(rtc_time64_to_tm_test_date_range_160000),
{}
};
diff --git a/drivers/rtc/rtc-cros-ec.c b/drivers/rtc/rtc-cros-ec.c
index 0cd397c04ff0..f57462c7b2c6 100644
--- a/drivers/rtc/rtc-cros-ec.c
+++ b/drivers/rtc/rtc-cros-ec.c
@@ -5,6 +5,7 @@
// Author: Stephen Barber <smbarber@chromium.org>
#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
@@ -392,6 +393,12 @@ static void cros_ec_rtc_remove(struct platform_device *pdev)
dev_err(dev, "failed to unregister notifier\n");
}
+static const struct platform_device_id cros_ec_rtc_id[] = {
+ { DRV_NAME, 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(platform, cros_ec_rtc_id);
+
static struct platform_driver cros_ec_rtc_driver = {
.probe = cros_ec_rtc_probe,
.remove_new = cros_ec_rtc_remove,
@@ -399,6 +406,7 @@ static struct platform_driver cros_ec_rtc_driver = {
.name = DRV_NAME,
.pm = &cros_ec_rtc_pm_ops,
},
+ .id_table = cros_ec_rtc_id,
};
module_platform_driver(cros_ec_rtc_driver);
@@ -406,4 +414,3 @@ module_platform_driver(cros_ec_rtc_driver);
MODULE_DESCRIPTION("RTC driver for Chrome OS ECs");
MODULE_AUTHOR("Stephen Barber <smbarber@chromium.org>");
MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c
index 0d515b3df571..e12f0f806ec4 100644
--- a/drivers/rtc/rtc-mcp795.c
+++ b/drivers/rtc/rtc-mcp795.c
@@ -450,4 +450,3 @@ module_spi_driver(mcp795_driver);
MODULE_DESCRIPTION("MCP795 RTC SPI Driver");
MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("spi:mcp795");
diff --git a/drivers/rtc/rtc-nct3018y.c b/drivers/rtc/rtc-nct3018y.c
index 076d8b99f913..7a8b4de893b8 100644
--- a/drivers/rtc/rtc-nct3018y.c
+++ b/drivers/rtc/rtc-nct3018y.c
@@ -517,12 +517,15 @@ static int nct3018y_probe(struct i2c_client *client)
if (nct3018y->part_num < 0) {
dev_dbg(&client->dev, "Failed to read NCT3018Y_REG_PART.\n");
return nct3018y->part_num;
- } else if (nct3018y->part_num == NCT3018Y_REG_PART_NCT3018Y) {
- flags = NCT3018Y_BIT_HF;
- err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags);
- if (err < 0) {
- dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL.\n");
- return err;
+ } else {
+ nct3018y->part_num &= 0x03; /* Part number is corresponding to bit 0 and 1 */
+ if (nct3018y->part_num == NCT3018Y_REG_PART_NCT3018Y) {
+ flags = NCT3018Y_BIT_HF;
+ err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags);
+ if (err < 0) {
+ dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL.\n");
+ return err;
+ }
}
}
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index ea82b89d8929..1949d7473310 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -527,7 +527,6 @@ static int pcf8563_probe(struct i2c_client *client)
i2c_set_clientdata(client, pcf8563);
pcf8563->client = client;
- device_set_wakeup_capable(&client->dev, 1);
/* Set timer to lowest frequency to save power (ref Haoyu datasheet) */
buf = PCF8563_TMRC_1_60;
@@ -553,6 +552,7 @@ static int pcf8563_probe(struct i2c_client *client)
/* the pcf8563 alarm only supports a minute accuracy */
set_bit(RTC_FEATURE_ALARM_RES_MINUTE, pcf8563->rtc->features);
clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, pcf8563->rtc->features);
+ clear_bit(RTC_FEATURE_ALARM, pcf8563->rtc->features);
pcf8563->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
pcf8563->rtc->range_max = RTC_TIMESTAMP_END_2099;
pcf8563->rtc->set_start_time = true;
@@ -573,7 +573,12 @@ static int pcf8563_probe(struct i2c_client *client)
return err;
}
} else {
- clear_bit(RTC_FEATURE_ALARM, pcf8563->rtc->features);
+ client->irq = 0;
+ }
+
+ if (client->irq > 0 || device_property_read_bool(&client->dev, "wakeup-source")) {
+ device_init_wakeup(&client->dev, true);
+ set_bit(RTC_FEATURE_ALARM, pcf8563->rtc->features);
}
err = devm_rtc_register_device(pcf8563->rtc);
diff --git a/drivers/rtc/rtc-rx6110.c b/drivers/rtc/rtc-rx6110.c
index 834274db8c3f..af6dd6ccbe3b 100644
--- a/drivers/rtc/rtc-rx6110.c
+++ b/drivers/rtc/rtc-rx6110.c
@@ -330,7 +330,7 @@ static int rx6110_probe(struct rx6110_data *rx6110, struct device *dev)
}
#if IS_ENABLED(CONFIG_SPI_MASTER)
-static struct regmap_config regmap_spi_config = {
+static const struct regmap_config regmap_spi_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RX6110_REG_IRQ,
@@ -410,7 +410,7 @@ static void rx6110_spi_unregister(void)
#endif /* CONFIG_SPI_MASTER */
#if IS_ENABLED(CONFIG_I2C)
-static struct regmap_config regmap_i2c_config = {
+static const struct regmap_config regmap_i2c_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RX6110_REG_IRQ,
diff --git a/drivers/rtc/rtc-rx8111.c b/drivers/rtc/rtc-rx8111.c
new file mode 100644
index 000000000000..8450d9f0b566
--- /dev/null
+++ b/drivers/rtc/rtc-rx8111.c
@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for Epson RX8111 RTC.
+ *
+ * Copyright (C) 2023 Axis Communications AB
+ */
+
+#include <linux/bcd.h>
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include <linux/rtc.h>
+
+#define RX8111_REG_SEC 0x10 /* Second counter. */
+#define RX8111_REG_MIN 0x11 /* Minute counter */
+#define RX8111_REG_HOUR 0x12 /* Hour counter. */
+#define RX8111_REG_WEEK 0x13 /* Week day counter. */
+#define RX8111_REG_DAY 0x14 /* Month day counter. */
+#define RX8111_REG_MONTH 0x15 /* Month counter. */
+#define RX8111_REG_YEAR 0x16 /* Year counter. */
+
+#define RX8111_REG_ALARM_MIN 0x17 /* Alarm minute. */
+#define RX8111_REG_ALARM_HOUR 0x18 /* Alarm hour. */
+#define RX8111_REG_ALARM_WEEK_DAY 0x19 /* Alarm week or month day. */
+
+#define RX8111_REG_TIMER_COUNTER0 0x1a /* Timer counter LSB. */
+#define RX8111_REG_TIMER_COUNTER1 0x1b /* Timer counter. */
+#define RX8111_REG_TIMER_COUNTER2 0x1c /* Timer counter MSB. */
+
+#define RX8111_REG_EXT 0x1d /* Extension register. */
+#define RX8111_REG_FLAG 0x1e /* Flag register. */
+#define RX8111_REG_CTRL 0x1f /* Control register. */
+
+#define RX8111_REG_TS_1_1000_SEC 0x20 /* Timestamp 256 or 512 Hz . */
+#define RX8111_REG_TS_1_100_SEC 0x21 /* Timestamp 1 - 128 Hz. */
+#define RX8111_REG_TS_SEC 0x22 /* Timestamp second. */
+#define RX8111_REG_TS_MIN 0x23 /* Timestamp minute. */
+#define RX8111_REG_TS_HOUR 0x24 /* Timestamp hour. */
+#define RX8111_REG_TS_WEEK 0x25 /* Timestamp week day. */
+#define RX8111_REG_TS_DAY 0x26 /* Timestamp month day. */
+#define RX8111_REG_TS_MONTH 0x27 /* Timestamp month. */
+#define RX8111_REG_TS_YEAR 0x28 /* Timestamp year. */
+#define RX8111_REG_TS_STATUS 0x29 /* Timestamp status. */
+
+#define RX8111_REG_EVIN_SETTING 0x2b /* Timestamp trigger setting. */
+#define RX8111_REG_ALARM_SEC 0x2c /* Alarm second. */
+#define RX8111_REG_TIMER_CTRL 0x2d /* Timer control. */
+#define RX8111_REG_TS_CTRL0 0x2e /* Timestamp control 0. */
+#define RX8111_REG_CMD_TRIGGER 0x2f /* Timestamp trigger. */
+#define RX8111_REG_PWR_SWITCH_CTRL 0x32 /* Power switch control. */
+#define RX8111_REG_STATUS_MON 0x33 /* Status monitor. */
+#define RX8111_REG_TS_CTRL1 0x34 /* Timestamp control 1. */
+#define RX8111_REG_TS_CTRL2 0x35 /* Timestamp control 2. */
+#define RX8111_REG_TS_CTRL3 0x36 /* Timestamp control 3. */
+
+#define RX8111_FLAG_XST_BIT BIT(0)
+#define RX8111_FLAG_VLF_BIT BIT(1)
+
+#define RX8111_TIME_BUF_SZ (RX8111_REG_YEAR - RX8111_REG_SEC + 1)
+
+enum rx8111_regfield {
+ /* RX8111_REG_EXT. */
+ RX8111_REGF_TSEL0,
+ RX8111_REGF_TSEL1,
+ RX8111_REGF_ETS,
+ RX8111_REGF_WADA,
+ RX8111_REGF_TE,
+ RX8111_REGF_USEL,
+ RX8111_REGF_FSEL0,
+ RX8111_REGF_FSEL1,
+
+ /* RX8111_REG_FLAG. */
+ RX8111_REGF_XST,
+ RX8111_REGF_VLF,
+ RX8111_REGF_EVF,
+ RX8111_REGF_AF,
+ RX8111_REGF_TF,
+ RX8111_REGF_UF,
+ RX8111_REGF_POR,
+
+ /* RX8111_REG_CTRL. */
+ RX8111_REGF_STOP,
+ RX8111_REGF_EIE,
+ RX8111_REGF_AIE,
+ RX8111_REGF_TIE,
+ RX8111_REGF_UIE,
+
+ /* RX8111_REG_PWR_SWITCH_CTRL. */
+ RX8111_REGF_SMPT0,
+ RX8111_REGF_SMPT1,
+ RX8111_REGF_SWSEL0,
+ RX8111_REGF_SWSEL1,
+ RX8111_REGF_INIEN,
+ RX8111_REGF_CHGEN,
+
+ /* RX8111_REG_STATUS_MON. */
+ RX8111_REGF_VLOW,
+
+ /* Sentinel value. */
+ RX8111_REGF_MAX
+};
+
+static const struct reg_field rx8111_regfields[] = {
+ [RX8111_REGF_TSEL0] = REG_FIELD(RX8111_REG_EXT, 0, 0),
+ [RX8111_REGF_TSEL1] = REG_FIELD(RX8111_REG_EXT, 1, 1),
+ [RX8111_REGF_ETS] = REG_FIELD(RX8111_REG_EXT, 2, 2),
+ [RX8111_REGF_WADA] = REG_FIELD(RX8111_REG_EXT, 3, 3),
+ [RX8111_REGF_TE] = REG_FIELD(RX8111_REG_EXT, 4, 4),
+ [RX8111_REGF_USEL] = REG_FIELD(RX8111_REG_EXT, 5, 5),
+ [RX8111_REGF_FSEL0] = REG_FIELD(RX8111_REG_EXT, 6, 6),
+ [RX8111_REGF_FSEL1] = REG_FIELD(RX8111_REG_EXT, 7, 7),
+
+ [RX8111_REGF_XST] = REG_FIELD(RX8111_REG_FLAG, 0, 0),
+ [RX8111_REGF_VLF] = REG_FIELD(RX8111_REG_FLAG, 1, 1),
+ [RX8111_REGF_EVF] = REG_FIELD(RX8111_REG_FLAG, 2, 2),
+ [RX8111_REGF_AF] = REG_FIELD(RX8111_REG_FLAG, 3, 3),
+ [RX8111_REGF_TF] = REG_FIELD(RX8111_REG_FLAG, 4, 4),
+ [RX8111_REGF_UF] = REG_FIELD(RX8111_REG_FLAG, 5, 5),
+ [RX8111_REGF_POR] = REG_FIELD(RX8111_REG_FLAG, 7, 7),
+
+ [RX8111_REGF_STOP] = REG_FIELD(RX8111_REG_CTRL, 0, 0),
+ [RX8111_REGF_EIE] = REG_FIELD(RX8111_REG_CTRL, 2, 2),
+ [RX8111_REGF_AIE] = REG_FIELD(RX8111_REG_CTRL, 3, 3),
+ [RX8111_REGF_TIE] = REG_FIELD(RX8111_REG_CTRL, 4, 4),
+ [RX8111_REGF_UIE] = REG_FIELD(RX8111_REG_CTRL, 5, 5),
+
+ [RX8111_REGF_SMPT0] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 0, 0),
+ [RX8111_REGF_SMPT1] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 1, 1),
+ [RX8111_REGF_SWSEL0] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 2, 2),
+ [RX8111_REGF_SWSEL1] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 3, 3),
+ [RX8111_REGF_INIEN] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 6, 6),
+ [RX8111_REGF_CHGEN] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 7, 7),
+
+ [RX8111_REGF_VLOW] = REG_FIELD(RX8111_REG_STATUS_MON, 1, 1),
+};
+
+static const struct regmap_config rx8111_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RX8111_REG_TS_CTRL3,
+};
+
+struct rx8111_data {
+ struct regmap *regmap;
+ struct regmap_field *regfields[RX8111_REGF_MAX];
+ struct device *dev;
+ struct rtc_device *rtc;
+};
+
+static int rx8111_read_vl_flag(struct rx8111_data *data, unsigned int *vlval)
+{
+ int ret;
+
+ ret = regmap_field_read(data->regfields[RX8111_REGF_VLF], vlval);
+ if (ret)
+ dev_dbg(data->dev, "Could not read VL flag (%d)", ret);
+
+ return ret;
+}
+
+static int rx8111_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct rx8111_data *data = dev_get_drvdata(dev);
+ u8 buf[RX8111_TIME_BUF_SZ];
+ unsigned int regval;
+ int ret;
+
+ /* Check status. */
+ ret = regmap_read(data->regmap, RX8111_REG_FLAG, &regval);
+ if (ret) {
+ dev_dbg(data->dev, "Could not read flag register (%d)\n", ret);
+ return ret;
+ }
+
+ if (FIELD_GET(RX8111_FLAG_XST_BIT, regval)) {
+ dev_dbg(data->dev,
+ "Crystal oscillation stopped, time is not reliable\n");
+ return -EINVAL;
+ }
+
+ if (FIELD_GET(RX8111_FLAG_VLF_BIT, regval)) {
+ dev_dbg(data->dev,
+ "Low voltage detected, time is not reliable\n");
+ return -EINVAL;
+ }
+
+ ret = regmap_field_read(data->regfields[RX8111_REGF_STOP], &regval);
+ if (ret) {
+ dev_dbg(data->dev, "Could not read clock status (%d)\n", ret);
+ return ret;
+ }
+
+ if (regval) {
+ dev_dbg(data->dev, "Clock stopped, time is not reliable\n");
+ return -EINVAL;
+ }
+
+ /* Read time. */
+ ret = regmap_bulk_read(data->regmap, RX8111_REG_SEC, buf,
+ ARRAY_SIZE(buf));
+ if (ret) {
+ dev_dbg(data->dev, "Could not bulk read time (%d)\n", ret);
+ return ret;
+ }
+
+ tm->tm_sec = bcd2bin(buf[0]);
+ tm->tm_min = bcd2bin(buf[1]);
+ tm->tm_hour = bcd2bin(buf[2]);
+ tm->tm_wday = ffs(buf[3]) - 1;
+ tm->tm_mday = bcd2bin(buf[4]);
+ tm->tm_mon = bcd2bin(buf[5]) - 1;
+ tm->tm_year = bcd2bin(buf[6]) + 100;
+
+ return 0;
+}
+
+static int rx8111_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct rx8111_data *data = dev_get_drvdata(dev);
+ u8 buf[RX8111_TIME_BUF_SZ];
+ int ret;
+
+ buf[0] = bin2bcd(tm->tm_sec);
+ buf[1] = bin2bcd(tm->tm_min);
+ buf[2] = bin2bcd(tm->tm_hour);
+ buf[3] = BIT(tm->tm_wday);
+ buf[4] = bin2bcd(tm->tm_mday);
+ buf[5] = bin2bcd(tm->tm_mon + 1);
+ buf[6] = bin2bcd(tm->tm_year - 100);
+
+ ret = regmap_clear_bits(data->regmap, RX8111_REG_FLAG,
+ RX8111_FLAG_XST_BIT | RX8111_FLAG_VLF_BIT);
+ if (ret)
+ return ret;
+
+ /* Stop the clock. */
+ ret = regmap_field_write(data->regfields[RX8111_REGF_STOP], 1);
+ if (ret) {
+ dev_dbg(data->dev, "Could not stop the clock (%d)\n", ret);
+ return ret;
+ }
+
+ /* Set the time. */
+ ret = regmap_bulk_write(data->regmap, RX8111_REG_SEC, buf,
+ ARRAY_SIZE(buf));
+ if (ret) {
+ dev_dbg(data->dev, "Could not bulk write time (%d)\n", ret);
+
+ /*
+ * We don't bother with trying to start the clock again. We
+ * check for this in rx8111_read_time() (and thus force user to
+ * call rx8111_set_time() to try again).
+ */
+ return ret;
+ }
+
+ /* Start the clock. */
+ ret = regmap_field_write(data->regfields[RX8111_REGF_STOP], 0);
+ if (ret) {
+ dev_dbg(data->dev, "Could not start the clock (%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rx8111_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+ struct rx8111_data *data = dev_get_drvdata(dev);
+ unsigned int regval;
+ unsigned int vlval;
+ int ret;
+
+ switch (cmd) {
+ case RTC_VL_READ:
+ ret = rx8111_read_vl_flag(data, &regval);
+ if (ret)
+ return ret;
+
+ vlval = regval ? RTC_VL_DATA_INVALID : 0;
+
+ ret = regmap_field_read(data->regfields[RX8111_REGF_VLOW],
+ &regval);
+ if (ret)
+ return ret;
+
+ vlval |= regval ? RTC_VL_BACKUP_LOW : 0;
+
+ return put_user(vlval, (typeof(vlval) __user *)arg);
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+static const struct rtc_class_ops rx8111_rtc_ops = {
+ .read_time = rx8111_read_time,
+ .set_time = rx8111_set_time,
+ .ioctl = rx8111_ioctl,
+};
+
+static int rx8111_probe(struct i2c_client *client)
+{
+ struct rx8111_data *data;
+ struct rtc_device *rtc;
+ size_t i;
+
+ data = devm_kmalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ dev_dbg(&client->dev, "Could not allocate device data\n");
+ return -ENOMEM;
+ }
+
+ data->dev = &client->dev;
+ dev_set_drvdata(data->dev, data);
+
+ data->regmap = devm_regmap_init_i2c(client, &rx8111_regmap_config);
+ if (IS_ERR(data->regmap)) {
+ dev_dbg(data->dev, "Could not initialize regmap\n");
+ return PTR_ERR(data->regmap);
+ }
+
+ for (i = 0; i < RX8111_REGF_MAX; ++i) {
+ data->regfields[i] = devm_regmap_field_alloc(
+ data->dev, data->regmap, rx8111_regfields[i]);
+ if (IS_ERR(data->regfields[i])) {
+ dev_dbg(data->dev,
+ "Could not allocate register field %zu\n", i);
+ return PTR_ERR(data->regfields[i]);
+ }
+ }
+
+ rtc = devm_rtc_allocate_device(data->dev);
+ if (IS_ERR(rtc)) {
+ dev_dbg(data->dev, "Could not allocate rtc device\n");
+ return PTR_ERR(rtc);
+ }
+
+ rtc->ops = &rx8111_rtc_ops;
+ rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ rtc->range_max = RTC_TIMESTAMP_END_2099;
+
+ clear_bit(RTC_FEATURE_ALARM, rtc->features);
+
+ return devm_rtc_register_device(rtc);
+}
+
+static const struct of_device_id rx8111_of_match[] = {
+ {
+ .compatible = "epson,rx8111",
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rx8111_of_match);
+
+static struct i2c_driver rx8111_driver = {
+ .driver = {
+ .name = "rtc-rx8111",
+ .of_match_table = rx8111_of_match,
+ },
+ .probe = rx8111_probe,
+};
+module_i2c_driver(rx8111_driver);
+
+MODULE_AUTHOR("Waqar Hameed <waqar.hameed@axis.com>");
+MODULE_DESCRIPTION("Epson RX8111 RTC driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-16 16:21:07 +0300