user/sven/linux.git/drivers/rtc/rtc-sysfs.c, branch v4.19.225

rtc: sysfs: fix NULL check in rtc_add_groups()

2019-11-20T17:45:25Z

[ Upstream commit 777d8ae56da18fb6440acd941edb3597c1b02bf0 ] devm_kcalloc() returns NULL, it never returns error pointers. In the current code we would return PTR_ERR(NULL) which is success, instead of returning the -ENOMEM error code. Fixes: a0a1a1ba3032 ("rtc: sysfs: facilitate attribute add to rtc device") Signed-off-by: Dan Carpenter Signed-off-by: Alexandre Belloni Signed-off-by: Sasha Levin

rtc: sysfs: facilitate attribute add to rtc device

2018-08-14T20:56:27Z

This patches addresses following problem: rtc_allocate_device devm_device_add_group <-- kernel oops / null pointer, because sysfs entry does not yet exist rtc_register_device rc = devm_device_add_group if (rc) return rc; <-- forbidden to return error code after device register This patch adds rtc_add_group(s) functions. The functions store the sum of attribute groups as device resource. Signed-off-by: Denis Osterland Signed-off-by: Alexandre Belloni

rtc: Add RTC range

2018-03-17T13:20:54Z

Add a way for drivers to inform the core of the supported date/time range. The core can then check whether the date/time or alarm is in the range before calling ->set_time, ->set_mmss or ->set_alarm. It returns -ERANGE when the time is out of range. Signed-off-by: Alexandre Belloni

rtc: sysfs: Use time64_t variables to set time/alarm

2017-11-10T08:57:38Z

Use time64_t variables and related APIs for sysfs interfaces to support setting time or alarm after the year 2038 on 32-bit system. Signed-off-by: Baolin Wang Reviewed-by: Arnd Bergmann Signed-off-by: Alexandre Belloni

rtc: sysfs: make name uniform

2017-06-03T08:52:04Z

The name sysfs attribute is not useful in its current form because of all the drivers: - 3 are using the feature correctly - 2 are clearly misusing it - 60 are using driver.name, either directly or indirectly - 46 are using pdev->name - 8 are using client->name - 31 are using a variation of driver.name (addition or removal of rtc-, -rtc, _rtc, rtc_) Make it uniform and use the driver name and the device name. Signed-off-by: Alexandre Belloni

rtc: sysfs: fix a cast removing the const attribute

2016-08-31T16:21:35Z

The char pointer buf_ptr is assigned an address from a const char pointer buf (parameter of wakealarm_store). The data pointer by buf_ptr is never modified. So casting it to a (char *) is useless. This patch remove this cast, and transform buf_ptr to a const char pointer. Signed-off-by: LABBE Corentin Signed-off-by: Alexandre Belloni

rtc: implement a sysfs interface for clock offset

2016-03-14T16:08:16Z

clock offset may be set and read in decimal parts per billion attribute is /sys/class/rtc/rtcN/offset The attribute is only visible for rtcs that have set_offset implemented. Signed-off-by: Joshua Clayton Signed-off-by: Alexandre Belloni

rtc: Replace simple_strtoul by kstrtoul

2016-01-11T19:20:02Z

The simple_strtoul function is obsolete. This patch replace it by kstrtoul. Since kstrtoul is more strict, it permits to filter some invalid input that simple_strtoul accept. For example: echo '1022xxx' > /sys/devices/pnp0/00:03/rtc/rtc0/max_user_freq cat /sys/devices/pnp0/00:03/rtc/rtc0/max_user_freq 1022 Signed-off-by: LABBE Corentin Signed-off-by: Alexandre Belloni

rtc: switch to using is_visible() to control sysfs attributes

2015-09-05T11:19:07Z

Instead of creating wakealarm attribute manually, after the device has been registered, let's rely on facilities provided by the attribute groups to control which attributes are visible and which are not. This allows to create all needed attributes at once, at the same time that we register RTC class device. Signed-off-by: Dmitry Torokhov Reviewed-by: Krzysztof Kozlowski Signed-off-by: Alexandre Belloni

rtc: switch wakealarm attribute to DEVICE_ATTR_RW

2015-09-05T11:19:07Z

Instead of using older style DEVICE_ATTR for wakealarm attribute let's switch to using DEVICE_ATTR_RW that ensures consistent across the kernel permissions on the attribute. Signed-off-by: Dmitry Torokhov Reviewed-by: Krzysztof Kozlowski Signed-off-by: Alexandre Belloni