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From:   =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>
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        Benjamin Fair <benjaminfair@google.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        Guenter Roeck <linux@roeck-us.net>
Subject: [PATCH v4 0/6] Nuvoton WPCM450 clock and reset driver
Date:   Fri, 10 Jun 2022 09:21:35 +0200
Message-Id: <20220610072141.347795-1-j.neuschaefer@gmx.net>
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Precedence: bulk

This series adds support for the clock and reset controller in the Nuvoton
WPCM450 SoC. This means that the clock rates for peripherals will be calcu=
lated
automatically based on the clock tree as it was preconfigured by the bootl=
oader.
The 24 MHz dummy clock, that is currently in the devicetree, is no longer =
needed.
Somewhat unfortunately, this also means that there is a breaking change on=
ce
the devicetree starts relying on the clock driver, but I find it acceptabl=
e in
this case, because WPCM450 is still at a somewhat early stage.


Upstreaming plan (although other suggestions are welcome):

Once reviewed,

- The ARM/dts changes should go through Joel Stanley's bmc tree
- The clocksource/timer changes should probably go via Daniel Lezcano and =
TIP
- The watchdog patch should go via the watchdog tree
- The clock controller bindings and driver should go through the clk tree
- It might make sense to delay the final ARM/dts patch ("ARM: dts: wpcm450=
:
  Switch clocks to clock controller") until next cycle to make sure it is
  merged after the clock driver.


v4:
- Leave WDT clock running during after restart handler
- Fix reset controller initialization
- Dropped patch 2/7 (clocksource: timer-npcm7xx: Enable timer 1 clock befo=
re use),
  as it was applied by Daniel Lezcano

v3:
- https://lore.kernel.org/lkml/20220508194333.2170161-1-j.neuschaefer@gmx.=
net/
- Changed "refclk" string to "ref"
- Fixed some dead code in the driver
- Added clk_prepare_enable call to the watchdog restart handler
- Added a few review tags

v2:
- https://lore.kernel.org/lkml/20220429172030.398011-1-j.neuschaefer@gmx.n=
et/
- various small improvements

v1:
- https://lore.kernel.org/lkml/20220422183012.444674-1-j.neuschaefer@gmx.n=
et/

Jonathan Neusch=C3=A4fer (6):
  dt-bindings: timer: nuvoton,npcm7xx-timer: Allow specifying all clocks
  watchdog: npcm: Enable clock if provided
  dt-bindings: clock: Add Nuvoton WPCM450 clock/reset controller
  ARM: dts: wpcm450: Add clock controller node
  clk: wpcm450: Add Nuvoton WPCM450 clock/reset controller driver
  ARM: dts: wpcm450: Switch clocks to clock controller

 .../bindings/clock/nuvoton,wpcm450-clk.yaml   |  66 ++++
 .../bindings/timer/nuvoton,npcm7xx-timer.yaml |   8 +-
 arch/arm/boot/dts/nuvoton-wpcm450.dtsi        |  29 +-
 drivers/clk/Makefile                          |   1 +
 drivers/clk/clk-wpcm450.c                     | 364 ++++++++++++++++++
 drivers/reset/Kconfig                         |   2 +-
 drivers/watchdog/npcm_wdt.c                   |  16 +
 .../dt-bindings/clock/nuvoton,wpcm450-clk.h   |  67 ++++
 8 files changed, 544 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/nuvoton,wpcm45=
0-clk.yaml
 create mode 100644 drivers/clk/clk-wpcm450.c
 create mode 100644 include/dt-bindings/clock/nuvoton,wpcm450-clk.h

=2D-
2.35.1