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path: root/drivers/rtc/rtc-ds1305.c
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Diffstat (limited to 'drivers/rtc/rtc-ds1305.c')
-rw-r--r--drivers/rtc/rtc-ds1305.c108
1 files changed, 41 insertions, 67 deletions
diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c
index 72b22935eb62..d4de401548b4 100644
--- a/drivers/rtc/rtc-ds1305.c
+++ b/drivers/rtc/rtc-ds1305.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* rtc-ds1305.c -- driver for DS1305 and DS1306 SPI RTC chips
*
* Copyright (C) 2008 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
*/
#include <linux/kernel.h>
#include <linux/init.h>
@@ -203,8 +199,7 @@ static int ds1305_get_time(struct device *dev, struct rtc_time *time)
time->tm_hour, time->tm_mday,
time->tm_mon, time->tm_year, time->tm_wday);
- /* Time may not be set */
- return rtc_valid_tm(time);
+ return 0;
}
static int ds1305_set_time(struct device *dev, struct rtc_time *time)
@@ -330,23 +325,19 @@ static int ds1305_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
u8 buf[1 + DS1305_ALM_LEN];
/* convert desired alarm to time_t */
- status = rtc_tm_to_time(&alm->time, &later);
- if (status < 0)
- return status;
+ later = rtc_tm_to_time64(&alm->time);
/* Read current time as time_t */
status = ds1305_get_time(dev, &tm);
if (status < 0)
return status;
- status = rtc_tm_to_time(&tm, &now);
- if (status < 0)
- return status;
+ now = rtc_tm_to_time64(&tm);
/* make sure alarm fires within the next 24 hours */
if (later <= now)
return -EINVAL;
- if ((later - now) > 24 * 60 * 60)
- return -EDOM;
+ if ((later - now) > ds1305->rtc->alarm_offset_max)
+ return -ERANGE;
/* disable alarm if needed */
if (ds1305->ctrl[0] & DS1305_AEI0) {
@@ -444,13 +435,12 @@ static const struct rtc_class_ops ds1305_ops = {
static void ds1305_work(struct work_struct *work)
{
struct ds1305 *ds1305 = container_of(work, struct ds1305, work);
- struct mutex *lock = &ds1305->rtc->ops_lock;
struct spi_device *spi = ds1305->spi;
u8 buf[3];
int status;
/* lock to protect ds1305->ctrl */
- mutex_lock(lock);
+ rtc_lock(ds1305->rtc);
/* Disable the IRQ, and clear its status ... for now, we "know"
* that if more than one alarm is active, they're in sync.
@@ -468,7 +458,7 @@ static void ds1305_work(struct work_struct *work)
if (status < 0)
dev_dbg(&spi->dev, "clear irq --> %d\n", status);
- mutex_unlock(lock);
+ rtc_unlock(ds1305->rtc);
if (!test_bit(FLAG_EXITING, &ds1305->flags))
enable_irq(spi->irq);
@@ -514,58 +504,36 @@ static void msg_init(struct spi_message *m, struct spi_transfer *x,
spi_message_add_tail(x, m);
}
-static ssize_t
-ds1305_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int ds1305_nvram_read(void *priv, unsigned int off, void *buf,
+ size_t count)
{
- struct spi_device *spi;
+ struct ds1305 *ds1305 = priv;
+ struct spi_device *spi = ds1305->spi;
u8 addr;
struct spi_message m;
struct spi_transfer x[2];
- int status;
-
- spi = to_spi_device(kobj_to_dev(kobj));
addr = DS1305_NVRAM + off;
msg_init(&m, x, &addr, count, NULL, buf);
- status = spi_sync(spi, &m);
- if (status < 0)
- dev_err(&spi->dev, "nvram %s error %d\n", "read", status);
- return (status < 0) ? status : count;
+ return spi_sync(spi, &m);
}
-static ssize_t
-ds1305_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int ds1305_nvram_write(void *priv, unsigned int off, void *buf,
+ size_t count)
{
- struct spi_device *spi;
+ struct ds1305 *ds1305 = priv;
+ struct spi_device *spi = ds1305->spi;
u8 addr;
struct spi_message m;
struct spi_transfer x[2];
- int status;
-
- spi = to_spi_device(kobj_to_dev(kobj));
addr = (DS1305_WRITE | DS1305_NVRAM) + off;
msg_init(&m, x, &addr, count, buf, NULL);
- status = spi_sync(spi, &m);
- if (status < 0)
- dev_err(&spi->dev, "nvram %s error %d\n", "write", status);
- return (status < 0) ? status : count;
+ return spi_sync(spi, &m);
}
-static struct bin_attribute nvram = {
- .attr.name = "nvram",
- .attr.mode = S_IRUGO | S_IWUSR,
- .read = ds1305_nvram_read,
- .write = ds1305_nvram_write,
- .size = DS1305_NVRAM_LEN,
-};
-
/*----------------------------------------------------------------------*/
/*
@@ -579,6 +547,14 @@ static int ds1305_probe(struct spi_device *spi)
u8 addr, value;
struct ds1305_platform_data *pdata = dev_get_platdata(&spi->dev);
bool write_ctrl = false;
+ struct nvmem_config ds1305_nvmem_cfg = {
+ .name = "ds1305_nvram",
+ .word_size = 1,
+ .stride = 1,
+ .size = DS1305_NVRAM_LEN,
+ .reg_read = ds1305_nvram_read,
+ .reg_write = ds1305_nvram_write,
+ };
/* Sanity check board setup data. This may be hooked up
* in 3wire mode, but we don't care. Note that unless
@@ -708,13 +684,21 @@ static int ds1305_probe(struct spi_device *spi)
dev_dbg(&spi->dev, "AM/PM\n");
/* register RTC ... from here on, ds1305->ctrl needs locking */
- ds1305->rtc = devm_rtc_device_register(&spi->dev, "ds1305",
- &ds1305_ops, THIS_MODULE);
- if (IS_ERR(ds1305->rtc)) {
- status = PTR_ERR(ds1305->rtc);
- dev_dbg(&spi->dev, "register rtc --> %d\n", status);
+ ds1305->rtc = devm_rtc_allocate_device(&spi->dev);
+ if (IS_ERR(ds1305->rtc))
+ return PTR_ERR(ds1305->rtc);
+
+ ds1305->rtc->ops = &ds1305_ops;
+ ds1305->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ ds1305->rtc->range_max = RTC_TIMESTAMP_END_2099;
+ ds1305->rtc->alarm_offset_max = 24 * 60 * 60;
+
+ ds1305_nvmem_cfg.priv = ds1305;
+ status = devm_rtc_register_device(ds1305->rtc);
+ if (status)
return status;
- }
+
+ devm_rtc_nvmem_register(ds1305->rtc, &ds1305_nvmem_cfg);
/* Maybe set up alarm IRQ; be ready to handle it triggering right
* away. NOTE that we don't share this. The signal is active low,
@@ -734,29 +718,19 @@ static int ds1305_probe(struct spi_device *spi)
}
}
- /* export NVRAM */
- status = sysfs_create_bin_file(&spi->dev.kobj, &nvram);
- if (status < 0) {
- dev_err(&spi->dev, "register nvram --> %d\n", status);
- }
-
return 0;
}
-static int ds1305_remove(struct spi_device *spi)
+static void ds1305_remove(struct spi_device *spi)
{
struct ds1305 *ds1305 = spi_get_drvdata(spi);
- sysfs_remove_bin_file(&spi->dev.kobj, &nvram);
-
/* carefully shut down irq and workqueue, if present */
if (spi->irq) {
set_bit(FLAG_EXITING, &ds1305->flags);
devm_free_irq(&spi->dev, spi->irq, ds1305);
cancel_work_sync(&ds1305->work);
}
-
- return 0;
}
static struct spi_driver ds1305_driver = {
generated by cgit (git 2.34.1) at 2025-12-24 22:18:13 +0000