rtc: ftrtc010: use devm clock APIs to fix use-after-disable in remove

The driver mixes devm_rtc_register_device() with manual clock
disabling in ftrtc010_rtc_remove(). Because the RTC device was
registered via devm, it remains registered until devres cleanup
runs after .remove() returns. An unprivileged process holding an
open /dev/rtc0 file descriptor could issue ioctl(RTC_RD_TIME)
during this window, triggering MMIO reads on clock-gated hardware
and causing a synchronous external abort.

Replace devm_clk_get() + clk_prepare_enable() with
devm_clk_get_enabled() to tie clock lifecycle to devres. Remove
the manual .remove() callback and the corresponding error handling
labels in ftrtc010_rtc_probe().

Fixes: 1d61d2592c1f ("rtc: ftrtc010: Rename to Faraday FTRTC010")
Assisted-by: Sashiko AI [static analysis]
Signed-off-by: Liu Dalin <liudalin@kylinsec.com.cn>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Tested-by: Liu Dalin <liudalin@kylinsec.com.cn>
Link: https://patch.msgid.link/0238203A74C9B9F6+20260827080320.3351155-3-liudalin@kylinsec.com.cn
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

0 files changed, 0 insertions, 0 deletions