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-rw-r--r--drivers/rtc/Kconfig12
-rw-r--r--drivers/rtc/Makefile1
-rw-r--r--drivers/rtc/class.c7
-rw-r--r--drivers/rtc/interface.c6
-rw-r--r--drivers/rtc/rtc-isl1208.c3
-rw-r--r--drivers/rtc/rtc-pl031.c10
-rw-r--r--drivers/rtc/rtc-s3c.c8
-rw-r--r--drivers/rtc/rtc-snvs.c6
-rw-r--r--drivers/rtc/rtc-spear.c8
-rw-r--r--drivers/rtc/rtc-tegra.c8
-rw-r--r--drivers/rtc/rtc-vt8500.c2
-rw-r--r--drivers/rtc/systohc.c44
12 files changed, 89 insertions, 26 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index fabef47c1ef..aa64d5d3fb2 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -20,14 +20,24 @@ if RTC_CLASS
config RTC_HCTOSYS
bool "Set system time from RTC on startup and resume"
default y
+ depends on !ALWAYS_USE_PERSISTENT_CLOCK
help
If you say yes here, the system time (wall clock) will be set using
the value read from a specified RTC device. This is useful to avoid
unnecessary fsck runs at boot time, and to network better.
+config RTC_SYSTOHC
+ bool "Set the RTC time based on NTP synchronization"
+ default y
+ depends on !ALWAYS_USE_PERSISTENT_CLOCK
+ help
+ If you say yes here, the system time (wall clock) will be stored
+ in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
+ minutes if userspace reports synchronized NTP status.
+
config RTC_HCTOSYS_DEVICE
string "RTC used to set the system time"
- depends on RTC_HCTOSYS = y
+ depends on RTC_HCTOSYS = y || RTC_SYSTOHC = y
default "rtc0"
help
The RTC device that will be used to (re)initialize the system
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 68a3ca937c8..60c0414d67f 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -6,6 +6,7 @@ ccflags-$(CONFIG_RTC_DEBUG) := -DDEBUG
obj-$(CONFIG_RTC_LIB) += rtc-lib.o
obj-$(CONFIG_RTC_HCTOSYS) += hctosys.o
+obj-$(CONFIG_RTC_SYSTOHC) += systohc.o
obj-$(CONFIG_RTC_CLASS) += rtc-core.o
rtc-core-y := class.o interface.o
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 5143629dedb..26388f18259 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -50,6 +50,10 @@ static int rtc_suspend(struct device *dev, pm_message_t mesg)
struct rtc_device *rtc = to_rtc_device(dev);
struct rtc_time tm;
struct timespec delta, delta_delta;
+
+ if (has_persistent_clock())
+ return 0;
+
if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0)
return 0;
@@ -88,6 +92,9 @@ static int rtc_resume(struct device *dev)
struct timespec new_system, new_rtc;
struct timespec sleep_time;
+ if (has_persistent_clock())
+ return 0;
+
rtc_hctosys_ret = -ENODEV;
if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0)
return 0;
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 9592b936b71..42bd57da239 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -587,16 +587,16 @@ void rtc_update_irq(struct rtc_device *rtc,
}
EXPORT_SYMBOL_GPL(rtc_update_irq);
-static int __rtc_match(struct device *dev, void *data)
+static int __rtc_match(struct device *dev, const void *data)
{
- char *name = (char *)data;
+ const char *name = data;
if (strcmp(dev_name(dev), name) == 0)
return 1;
return 0;
}
-struct rtc_device *rtc_class_open(char *name)
+struct rtc_device *rtc_class_open(const char *name)
{
struct device *dev;
struct rtc_device *rtc = NULL;
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index afb7cfa85cc..c016ad81767 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -506,6 +506,7 @@ isl1208_rtc_interrupt(int irq, void *data)
{
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
struct i2c_client *client = data;
+ struct rtc_device *rtc = i2c_get_clientdata(client);
int handled = 0, sr, err;
/*
@@ -528,6 +529,8 @@ isl1208_rtc_interrupt(int irq, void *data)
if (sr & ISL1208_REG_SR_ALM) {
dev_dbg(&client->dev, "alarm!\n");
+ rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF);
+
/* Clear the alarm */
sr &= ~ISL1208_REG_SR_ALM;
sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr);
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 08378e3cc21..81c5077feff 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -44,6 +44,7 @@
#define RTC_YMR 0x34 /* Year match register */
#define RTC_YLR 0x38 /* Year data load register */
+#define RTC_CR_EN (1 << 0) /* counter enable bit */
#define RTC_CR_CWEN (1 << 26) /* Clockwatch enable bit */
#define RTC_TCR_EN (1 << 1) /* Periodic timer enable bit */
@@ -320,7 +321,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
struct pl031_local *ldata;
struct pl031_vendor_data *vendor = id->data;
struct rtc_class_ops *ops = &vendor->ops;
- unsigned long time;
+ unsigned long time, data;
ret = amba_request_regions(adev, NULL);
if (ret)
@@ -345,10 +346,13 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
dev_dbg(&adev->dev, "designer ID = 0x%02x\n", amba_manf(adev));
dev_dbg(&adev->dev, "revision = 0x%01x\n", amba_rev(adev));
+ data = readl(ldata->base + RTC_CR);
/* Enable the clockwatch on ST Variants */
if (vendor->clockwatch)
- writel(readl(ldata->base + RTC_CR) | RTC_CR_CWEN,
- ldata->base + RTC_CR);
+ data |= RTC_CR_CWEN;
+ else
+ data |= RTC_CR_EN;
+ writel(data, ldata->base + RTC_CR);
/*
* On ST PL031 variants, the RTC reset value does not provide correct
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 404651464d4..0c397ac3b13 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -486,11 +486,9 @@ static int s3c_rtc_probe(struct platform_device *pdev)
return -ENOENT;
}
- s3c_rtc_base = devm_request_and_ioremap(&pdev->dev, res);
- if (s3c_rtc_base == NULL) {
- dev_err(&pdev->dev, "failed to ioremap memory region\n");
- return -EINVAL;
- }
+ s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(s3c_rtc_base))
+ return PTR_ERR(s3c_rtc_base);
rtc_clk = devm_clk_get(&pdev->dev, "rtc");
if (IS_ERR(rtc_clk)) {
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index d5ec7854a65..40662e9dc0a 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -252,9 +252,9 @@ static int snvs_rtc_probe(struct platform_device *pdev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- data->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
- if (!data->ioaddr)
- return -EADDRNOTAVAIL;
+ data->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(data->ioaddr))
+ return PTR_ERR(data->ioaddr);
data->irq = platform_get_irq(pdev, 0);
if (data->irq < 0)
diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c
index c2121b5a01f..a18c3192ed4 100644
--- a/drivers/rtc/rtc-spear.c
+++ b/drivers/rtc/rtc-spear.c
@@ -385,11 +385,9 @@ static int spear_rtc_probe(struct platform_device *pdev)
return status;
}
- config->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
- if (!config->ioaddr) {
- dev_err(&pdev->dev, "request-ioremap fail\n");
- return -ENOMEM;
- }
+ config->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(config->ioaddr))
+ return PTR_ERR(config->ioaddr);
config->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(config->clk))
diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index c84ea6659f4..7c033756d6b 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -327,11 +327,9 @@ static int tegra_rtc_probe(struct platform_device *pdev)
return -EBUSY;
}
- info->rtc_base = devm_request_and_ioremap(&pdev->dev, res);
- if (!info->rtc_base) {
- dev_err(&pdev->dev, "Unable to request mem region and grab IOs for device.\n");
- return -EBUSY;
- }
+ info->rtc_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(info->rtc_base))
+ return PTR_ERR(info->rtc_base);
info->tegra_rtc_irq = platform_get_irq(pdev, 0);
if (info->tegra_rtc_irq <= 0)
diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c
index 00c930f4b6f..2730533e2d2 100644
--- a/drivers/rtc/rtc-vt8500.c
+++ b/drivers/rtc/rtc-vt8500.c
@@ -137,7 +137,7 @@ static int vt8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
return -EINVAL;
}
- writel((bin2bcd(tm->tm_year - 100) << DATE_YEAR_S)
+ writel((bin2bcd(tm->tm_year % 100) << DATE_YEAR_S)
| (bin2bcd(tm->tm_mon + 1) << DATE_MONTH_S)
| (bin2bcd(tm->tm_mday))
| ((tm->tm_year >= 200) << DATE_CENTURY_S),
diff --git a/drivers/rtc/systohc.c b/drivers/rtc/systohc.c
new file mode 100644
index 00000000000..bf3e242ccc5
--- /dev/null
+++ b/drivers/rtc/systohc.c
@@ -0,0 +1,44 @@
+/*
+ * 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/rtc.h>
+#include <linux/time.h>
+
+/**
+ * rtc_set_ntp_time - Save NTP synchronized time to the RTC
+ * @now: Current time of day
+ *
+ * Replacement for the NTP platform function update_persistent_clock
+ * that stores time for later retrieval by rtc_hctosys.
+ *
+ * Returns 0 on successful RTC update, -ENODEV if a RTC update is not
+ * possible at all, and various other -errno for specific temporary failure
+ * cases.
+ *
+ * If temporary failure is indicated the caller should try again 'soon'
+ */
+int rtc_set_ntp_time(struct timespec now)
+{
+ struct rtc_device *rtc;
+ struct rtc_time tm;
+ int err = -ENODEV;
+
+ if (now.tv_nsec < (NSEC_PER_SEC >> 1))
+ rtc_time_to_tm(now.tv_sec, &tm);
+ else
+ rtc_time_to_tm(now.tv_sec + 1, &tm);
+
+ rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
+ if (rtc) {
+ /* rtc_hctosys exclusively uses UTC, so we call set_time here,
+ * not set_mmss. */
+ if (rtc->ops && (rtc->ops->set_time || rtc->ops->set_mmss))
+ err = rtc_set_time(rtc, &tm);
+ rtc_class_close(rtc);
+ }
+
+ return err;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 02:25:49 +0000