From: Kevin Hilman khilman@linaro.org
Currently, the ->set_mode() method of a clockevent device is not allowed to fail, so it has no return value. In order to add new clockevent modes, and allow the setting of those modes to fail, we need the clockevent core to be able to detect when setting a mode fails.
Rather than changing the current ->set_mode() and requiring all clockevent devices to change immedately, introduce a new mode setting method ->set_dev_mode() which returns 'int'.
In addition, migrate a few drivers over to the new method to demonstrate how the new method is to be used, and how to convert.
Proposal for new method originally suggested by Thomas Gleixner[1].
[1] https://lkml.org/lkml/2014/5/10/86
Viresh Kumar (2): clockevents: introduce ->set_dev_mode() which can return error clockevents: migrate some drivers to new ->set_dev_mode()
drivers/clocksource/arm_arch_timer.c | 46 +++++++++++++++++--------------- drivers/clocksource/bcm2835_timer.c | 10 +++---- drivers/clocksource/bcm_kona_timer.c | 15 ++++++++--- drivers/clocksource/i8253.c | 11 +++++--- drivers/clocksource/time-armada-370-xp.c | 21 +++++++++++---- include/linux/clockchips.h | 5 +++- kernel/time/clockevents.c | 21 ++++++++++++--- kernel/time/timer_list.c | 5 +++- 8 files changed, 91 insertions(+), 43 deletions(-)