kernel/linux.git/drivers/rtc/rtc-loongson.c, branch v7.0.10

rtc: loongson: Add Loongson-2K0300 support

2026-01-30T23:12:32+00:00

The Loongson-2K0300's rtc hardware design is similar to that of the Loongson-1B, but it does not support the alarm feature. Introduce `LOONGSON_RTC_ALARM_WORKAROUND`, which indicates a chip that does not support the alarm feature, and rewrite the related logic in `loongson_rtc_alarm_setting()`. Reviewed-by: Huacai Chen Signed-off-by: Binbin Zhou Link: https://patch.msgid.link/abff68dda2fe6a6601a9e58b31e278d941297fce.1768616276.git.zhoubinbin@loongson.cn Signed-off-by: Alexandre Belloni

rtc: loongson: Add missing alarm notifications for ACPI RTC events

2025-05-24T22:18:29+00:00

When an application sets and enables an alarm on Loongson RTC devices, the alarm notification fails to propagate to userspace because the ACPI event handler omits calling rtc_update_irq(). As a result, processes waiting via select() or poll() on RTC device files fail to receive alarm notifications. The ACPI interrupt is also triggered multiple times. In loongson_rtc_handler, we need to clear TOY_MATCH0_REG to resolve this issue. Fixes: 09471d8f5b39 ("rtc: loongson: clear TOY_MATCH0_REG in loongson_rtc_isr()") Fixes: 1b733a9ebc3d ("rtc: Add rtc driver for the Loongson family chips") Signed-off-by: Liu Dalin Reviewed-by: Binbin Zhou Link: https://lore.kernel.org/r/20250509084416.7979-1-liudalin@kylinsec.com.cn Signed-off-by: Alexandre Belloni

rtc: loongson: clear TOY_MATCH0_REG in loongson_rtc_isr()

2025-01-12T23:39:36+00:00

The TOY_MATCH0_REG should be cleared to 0 in the RTC interrupt handler, otherwise the interrupt cannot be cleared, which will cause the loongson_rtc_isr() to be triggered multiple times. The previous code cleared TOY_MATCH0_REG in the loongson_rtc_handler(), which is an ACPI interrupt. This did not prevent loongson_rtc_isr() from being triggered multiple times. This commit moves the clearing of TOY_MATCH0_REG to the loongson_rtc_isr() to ensure that the interrupt is properly cleared. Fixes: 1b733a9ebc3d ("rtc: Add rtc driver for the Loongson family chips") Signed-off-by: Ming Wang Reviewed-by: Huacai Chen Reviewed-by: Keguang Zhang # on LS1B Tested-by: Keguang Zhang Link: https://lore.kernel.org/r/20241205114307.1891418-1-wangming01@loongson.cn Signed-off-by: Alexandre Belloni

rtc: use boolean values with device_init_wakeup()

2025-01-09T17:29:24+00:00

device_init_wakeup() second argument is a bool type. Use proper boolean values when calling it to match the type and to produce unambiguous code which is easier to understand. Signed-off-by: Wolfram Sang Reviewed-by: Charles Keepax Reviewed-by: Andre Przywara Link: https://lore.kernel.org/r/20241217071331.3607-2-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni

rtc: Switch back to struct platform_driver::remove()

2024-11-10T21:58:28+00:00

After commit 0edb555a65d1 ("platform: Make platform_driver::remove() return void") .remove() is (again) the right callback to implement for platform drivers. Convert all platform drivers below drivers/rtc to use .remove(), with the eventual goal to drop struct platform_driver::remove_new(). As .remove() and .remove_new() have the same prototypes, conversion is done by just changing the structure member name in the driver initializer. Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20241007205803.444994-6-u.kleine-koenig@baylibre.com Signed-off-by: Alexandre Belloni

rtc: Add rtc driver for the Loongson family chips

2023-06-25T23:19:11+00:00

The Loongson family chips use an on-chip counter 0 (Time Of Year counter) as the RTC. We will refer to them as rtc-loongson. Cc: Keguang Zhang Cc: Yang Ling Cc: Jiaxun Yang Signed-off-by: Binbin Zhou Signed-off-by: Huacai Chen Signed-off-by: WANG Xuerui Reviewed-by: Keguang Zhang Tested-by: Keguang Zhang Reviewed-by: Jiaxun Yang Tested-by: Jiaxun Yang # LS7A Link: https://lore.kernel.org/r/0c5171156390f614d72f36ceb04a20f432ca639e.1685693501.git.zhoubinbin@loongson.cn Signed-off-by: Alexandre Belloni