linux-toradex.git/drivers/rtc/rtc-m41t80.c, branch v6.17

rtc: m41t80: convert from round_rate() to determine_rate()

2025-08-03T00:57:05+00:00

The round_rate() clk ops is deprecated, so migrate this driver from
round_rate() to determine_rate() using the Coccinelle semantic patch
on the cover letter of this series.

Signed-off-by: Brian Masney 
Link: https://lore.kernel.org/r/20250710-rtc-clk-round-rate-v1-9-33140bb2278e@redhat.com
Signed-off-by: Alexandre Belloni

rtc: m41t80: remove HT feature for m41t65

2025-07-22T22:44:48+00:00

The M41T65 device does not support the "Halt Update Bit" (HT) feature
as per its datasheet.
This aligns the driver with the actual hardware capabilities.

Signed-off-by: Alexander Shiyan 
Link: https://lore.kernel.org/r/20250704091144.45389-1-eagle.alexander923@gmail.com
Signed-off-by: Alexandre Belloni

rtc: m41t80: reduce verbosity

2025-05-25T22:24:46+00:00

The driver currently uses dev_err for messages that have a very low probability
of being read by the user as the error will probably never happen and the
systems with the RTC probably don't have any user able to read the message.

Moreover, the only user action after getting this message is the restart the
action so drop the level to dev_dbg.

Link: https://lore.kernel.org/r/20250525222153.1472917-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni

rtc: m41t80: kickstart ocillator upon failure

2025-05-25T21:56:13+00:00

The ocillator on the m41t62 (and other chips of this type) needs
a kickstart upon a failure; the RTC read routine will notice the
oscillator failure and fail reads.  This is added in the RTC write
routine; this allows the system to know that the time in the RTC
is accurate.  This is following the procedure described in section
3.11 of  "https://www.st.com/resource/en/datasheet/m41t62.pdf"

Signed-off-by: A. Niyas Ahamed Mydeen 
Reviewed-by: Corey Minyard 
Link: https://lore.kernel.org/r/20250402120546.336657-2-nmydeen@mvista.com
Signed-off-by: Alexandre Belloni

[tree-wide] finally take no_llseek out

2024-09-27T15:18:43+00:00

no_llseek had been defined to NULL two years ago, in commit 868941b14441
("fs: remove no_llseek")

To quote that commit,

  At -rc1 we'll need do a mechanical removal of no_llseek -

  git grep -l -w no_llseek | grep -v porting.rst | while read i; do
	sed -i '/\/d' $i
  done

  would do it.

Unfortunately, that hadn't been done.  Linus, could you do that now, so
that we could finally put that thing to rest? All instances are of the
form
	.llseek = no_llseek,
so it's obviously safe.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

rtc: m41t80: Use the unified property API get the wakeup-source property

2024-02-29T21:28:19+00:00

This allows both ACPI and Device Tree systems to specify the m41t80 as a
wakeup-source.

Signed-off-by: Curtis Klein 
Link: https://lore.kernel.org/r/20240222011129.79241-1-curtis.klein@hpe.com
Signed-off-by: Alexandre Belloni

rtc: Explicitly include correct DT includes

2023-07-27T21:31:29+00:00

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring 
Link: https://lore.kernel.org/r/20230724205456.767430-1-robh@kernel.org
Signed-off-by: Alexandre Belloni

rtc: Switch i2c drivers back to use .probe()

2023-06-06T21:29:37+00:00

After commit b8a1a4cd5a98 ("i2c: Provide a temporary .probe_new()
call-back type"), all drivers being converted to .probe_new() and then
03c835f498b5 ("i2c: Switch .probe() to not take an id parameter") convert
back to (the new) .probe() to be able to eventually drop .probe_new() from
struct i2c_driver.

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20230505121136.1185653-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Alexandre Belloni

rtc: m41t80: use IRQ flags obtained from fwnode

2023-02-01T08:13:35+00:00

Allow the IRQ type to be passed from the device tree if available as there
may be components changing the trigger type of the interrupt between the
RTC and the IRQ controller.

Link: https://lore.kernel.org/r/20230123200217.1236011-4-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni

rtc: remove duplicated words in comments

2022-12-15T22:34:31+00:00

Signed-off-by: shaomin Deng 
Link: https://lore.kernel.org/r/20220808152354.3641-1-dengshaomin@cdjrlc.com
Link: https://lore.kernel.org/r/20220808153454.6844-1-dengshaomin@cdjrlc.com
Link: https://lore.kernel.org/r/20220808152822.5012-1-dengshaomin@cdjrlc.com
Signed-off-by: Alexandre Belloni