diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 28 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 2 | ||||
| -rw-r--r-- | drivers/rtc/class.c | 7 | ||||
| -rw-r--r-- | drivers/rtc/interface.c | 6 | ||||
| -rw-r--r-- | drivers/rtc/rtc-hid-sensor-time.c | 292 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pl031.c | 4 | ||||
| -rw-r--r-- | drivers/rtc/rtc-s3c.c | 8 | ||||
| -rw-r--r-- | drivers/rtc/rtc-snvs.c | 6 | ||||
| -rw-r--r-- | drivers/rtc/rtc-spear.c | 8 | ||||
| -rw-r--r-- | drivers/rtc/rtc-tegra.c | 8 | ||||
| -rw-r--r-- | drivers/rtc/systohc.c | 44 |
11 files changed, 390 insertions, 23 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 20354b4..476d064 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 @@ -1173,4 +1183,20 @@ config RTC_DRV_SNVS This driver can also be built as a module, if so, the module will be called "rtc-snvs". +comment "HID Sensor RTC drivers" + +config RTC_DRV_HID_SENSOR_TIME + tristate "HID Sensor Time" + depends on USB_HID + select IIO + select HID_SENSOR_HUB + select HID_SENSOR_IIO_COMMON + help + Say yes here to build support for the HID Sensors of type Time. + This drivers makes such sensors available as RTCs. + + If this driver is compiled as a module, it will be named + rtc-hid-sensor-time. + + endif # RTC_CLASS diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 4418ef3..60c0414 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-$(CONFIG_RTC_CLASS) += rtc-core.o rtc-core-y := class.o interface.o @@ -52,6 +53,7 @@ obj-$(CONFIG_RTC_DRV_EM3027) += rtc-em3027.o obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o +obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index 5143629..26388f1 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 9592b93..42bd57d 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-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c new file mode 100644 index 0000000..31c5728 --- /dev/null +++ b/drivers/rtc/rtc-hid-sensor-time.c @@ -0,0 +1,292 @@ +/* + * HID Sensor Time Driver + * Copyright (c) 2012, Alexander Holler. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/rtc.h> + +/* Format: HID-SENSOR-usage_id_in_hex */ +/* Usage ID from spec for Time: 0x2000A0 */ +#define DRIVER_NAME "HID-SENSOR-2000a0" /* must be lowercase */ + +enum hid_time_channel { + CHANNEL_SCAN_INDEX_YEAR, + CHANNEL_SCAN_INDEX_MONTH, + CHANNEL_SCAN_INDEX_DAY, + CHANNEL_SCAN_INDEX_HOUR, + CHANNEL_SCAN_INDEX_MINUTE, + CHANNEL_SCAN_INDEX_SECOND, + TIME_RTC_CHANNEL_MAX, +}; + +struct hid_time_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_common common_attributes; + struct hid_sensor_hub_attribute_info info[TIME_RTC_CHANNEL_MAX]; + struct rtc_time last_time; + spinlock_t lock_last_time; + struct completion comp_last_time; + struct rtc_time time_buf; + struct rtc_device *rtc; +}; + +static const u32 hid_time_addresses[TIME_RTC_CHANNEL_MAX] = { + HID_USAGE_SENSOR_TIME_YEAR, + HID_USAGE_SENSOR_TIME_MONTH, + HID_USAGE_SENSOR_TIME_DAY, + HID_USAGE_SENSOR_TIME_HOUR, + HID_USAGE_SENSOR_TIME_MINUTE, + HID_USAGE_SENSOR_TIME_SECOND, +}; + +/* Channel names for verbose error messages */ +static const char * const hid_time_channel_names[TIME_RTC_CHANNEL_MAX] = { + "year", "month", "day", "hour", "minute", "second", +}; + +/* Callback handler to send event after all samples are received and captured */ +static int hid_time_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, void *priv) +{ + unsigned long flags; + struct hid_time_state *time_state = platform_get_drvdata(priv); + + spin_lock_irqsave(&time_state->lock_last_time, flags); + time_state->last_time = time_state->time_buf; + spin_unlock_irqrestore(&time_state->lock_last_time, flags); + complete(&time_state->comp_last_time); + return 0; +} + +static int hid_time_capture_sample(struct hid_sensor_hub_device *hsdev, + unsigned usage_id, size_t raw_len, + char *raw_data, void *priv) +{ + struct hid_time_state *time_state = platform_get_drvdata(priv); + struct rtc_time *time_buf = &time_state->time_buf; + + switch (usage_id) { + case HID_USAGE_SENSOR_TIME_YEAR: + time_buf->tm_year = *(u8 *)raw_data; + if (time_buf->tm_year < 70) + /* assume we are in 1970...2069 */ + time_buf->tm_year += 100; + break; + case HID_USAGE_SENSOR_TIME_MONTH: + /* sensor sending the month as 1-12, we need 0-11 */ + time_buf->tm_mon = *(u8 *)raw_data-1; + break; + case HID_USAGE_SENSOR_TIME_DAY: + time_buf->tm_mday = *(u8 *)raw_data; + break; + case HID_USAGE_SENSOR_TIME_HOUR: + time_buf->tm_hour = *(u8 *)raw_data; + break; + case HID_USAGE_SENSOR_TIME_MINUTE: + time_buf->tm_min = *(u8 *)raw_data; + break; + case HID_USAGE_SENSOR_TIME_SECOND: + time_buf->tm_sec = *(u8 *)raw_data; + break; + default: + return -EINVAL; + } + return 0; +} + +/* small helper, haven't found any other way */ +static const char *hid_time_attrib_name(u32 attrib_id) +{ + static const char unknown[] = "unknown"; + unsigned i; + + for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) { + if (hid_time_addresses[i] == attrib_id) + return hid_time_channel_names[i]; + } + return unknown; /* should never happen */ +} + +static int hid_time_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + unsigned usage_id, + struct hid_time_state *time_state) +{ + int report_id, i; + + for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) + if (sensor_hub_input_get_attribute_info(hsdev, + HID_INPUT_REPORT, usage_id, + hid_time_addresses[i], + &time_state->info[i]) < 0) + return -EINVAL; + /* Check the (needed) attributes for sanity */ + report_id = time_state->info[0].report_id; + if (report_id < 0) { + dev_err(&pdev->dev, "bad report ID!\n"); + return -EINVAL; + } + for (i = 0; i < TIME_RTC_CHANNEL_MAX; ++i) { + if (time_state->info[i].report_id != report_id) { + dev_err(&pdev->dev, + "not all needed attributes inside the same report!\n"); + return -EINVAL; + } + if (time_state->info[i].size != 1) { + dev_err(&pdev->dev, + "attribute '%s' not 8 bits wide!\n", + hid_time_attrib_name( + time_state->info[i].attrib_id)); + return -EINVAL; + } + if (time_state->info[i].units != + HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED && + /* allow attribute seconds with unit seconds */ + !(time_state->info[i].attrib_id == + HID_USAGE_SENSOR_TIME_SECOND && + time_state->info[i].units == + HID_USAGE_SENSOR_UNITS_SECOND)) { + dev_err(&pdev->dev, + "attribute '%s' hasn't a unit of type 'none'!\n", + hid_time_attrib_name( + time_state->info[i].attrib_id)); + return -EINVAL; + } + if (time_state->info[i].unit_expo) { + dev_err(&pdev->dev, + "attribute '%s' hasn't a unit exponent of 1!\n", + hid_time_attrib_name( + time_state->info[i].attrib_id)); + return -EINVAL; + } + } + + return 0; +} + +static int hid_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + unsigned long flags; + struct hid_time_state *time_state = + platform_get_drvdata(to_platform_device(dev)); + int ret; + + INIT_COMPLETION(time_state->comp_last_time); + /* get a report with all values through requesting one value */ + sensor_hub_input_attr_get_raw_value(time_state->common_attributes.hsdev, + HID_USAGE_SENSOR_TIME, hid_time_addresses[0], + time_state->info[0].report_id); + /* wait for all values (event) */ + ret = wait_for_completion_killable_timeout( + &time_state->comp_last_time, HZ*6); + if (ret > 0) { + /* no error */ + spin_lock_irqsave(&time_state->lock_last_time, flags); + *tm = time_state->last_time; + spin_unlock_irqrestore(&time_state->lock_last_time, flags); + return 0; + } + if (!ret) + return -EIO; /* timeouted */ + return ret; /* killed (-ERESTARTSYS) */ +} + +static const struct rtc_class_ops hid_time_rtc_ops = { + .read_time = hid_rtc_read_time, +}; + +static int hid_time_probe(struct platform_device *pdev) +{ + int ret = 0; + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct hid_time_state *time_state = devm_kzalloc(&pdev->dev, + sizeof(struct hid_time_state), GFP_KERNEL); + + if (time_state == NULL) + return -ENOMEM; + + platform_set_drvdata(pdev, time_state); + + spin_lock_init(&time_state->lock_last_time); + init_completion(&time_state->comp_last_time); + time_state->common_attributes.hsdev = hsdev; + time_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, + HID_USAGE_SENSOR_TIME, + &time_state->common_attributes); + if (ret) { + dev_err(&pdev->dev, "failed to setup common attributes!\n"); + return ret; + } + + ret = hid_time_parse_report(pdev, hsdev, HID_USAGE_SENSOR_TIME, + time_state); + if (ret) { + dev_err(&pdev->dev, "failed to setup attributes!\n"); + return ret; + } + + time_state->callbacks.send_event = hid_time_proc_event; + time_state->callbacks.capture_sample = hid_time_capture_sample; + time_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_TIME, + &time_state->callbacks); + if (ret < 0) { + dev_err(&pdev->dev, "register callback failed!\n"); + return ret; + } + + time_state->rtc = rtc_device_register("hid-sensor-time", + &pdev->dev, &hid_time_rtc_ops, THIS_MODULE); + + if (IS_ERR(time_state->rtc)) { + dev_err(&pdev->dev, "rtc device register failed!\n"); + return PTR_ERR(time_state->rtc); + } + + return ret; +} + +static int hid_time_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct hid_time_state *time_state = platform_get_drvdata(pdev); + + rtc_device_unregister(time_state->rtc); + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME); + + return 0; +} + +static struct platform_driver hid_time_platform_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = hid_time_probe, + .remove = hid_time_remove, +}; +module_platform_driver(hid_time_platform_driver); + +MODULE_DESCRIPTION("HID Sensor Time"); +MODULE_AUTHOR("Alexander Holler <holler@ahsoftware.de>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index 10c1a34..81c5077 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -350,7 +350,9 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id) /* Enable the clockwatch on ST Variants */ if (vendor->clockwatch) data |= RTC_CR_CWEN; - writel(data | RTC_CR_EN, ldata->base + RTC_CR); + 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 4046514..0c397ac 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 d5ec785..40662e9 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 c2121b5..a18c319 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 c84ea66..7c03375 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/systohc.c b/drivers/rtc/systohc.c new file mode 100644 index 0000000..bf3e242 --- /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; +} |