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| author | Alexander Sverdlin <alexander.sverdlin@siemens.com> | 2026-08-28 18:44:42 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-10-29 11:23:58 +0100 |
| commit | 45efb584a1c0bcd6d75a239dd8ce3ca554a66cf5 (patch) | |
| tree | c8f14309cb3bc6d09425583a61fd1e904c9c0076 /tools/lib/python/kdoc | |
| parent | 09f5d9b8caafdfed36fb8115348e2cf1f1c31793 (diff) | |
rtc: pcf85063: add 1 Hz update interrupt (UIE) support
The PCF85063A/RV8263 have no dedicated 1 Hz update interrupt, but their
countdown timer can be sourced from a 1 Hz clock (TCF = 1 Hz, T = 1) to
generate a periodic interrupt on the INT pin. Use it to offload UIE to
the hardware, following the pattern of other RTC drivers: the timer is
enabled from set_alarm()/alarm_irq_enable() whenever uie_rtctimer is
active, and the IRQ handler reports RTC_UF when the timer flag (TF) is
set.
RTC_FEATURE_UPDATE_INTERRUPT is now only cleared when no usable interrupt
is wired, preserving the polling emulation for those configurations.
Co-developed-by: Adrian Freihofer <adrian.freihofer@siemens.com>
Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Link: https://patch.msgid.link/20260828164445.3907839-5-alexander.sverdlin@siemens.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'tools/lib/python/kdoc')
0 files changed, 0 insertions, 0 deletions