On ven. 04 sept. 2026 at 14:38, Long Zhao via B4 Relay <devnull+longzhao.ambarella.com@kernel.org> wrote:
> This series adds minimal Ambarella CV75 support for early bring-up with
> a serial console: DT bindings, RCT/CCU clocks, pinctrl, PL061 GPIO via
> gpio-regmap, 8250_dw UART quirks, ARCH_AMBARELLA, CV75 EVK DT, and
> MAINTAINERS.
>
> This is a single unified series. Please apply via the SoC tree;
> subsystem maintainers are Cc'd for their pieces.
>
> Verified with:
> - scripts/checkpatch.pl --strict (0 errors)
> - make dt_binding_check DT_SCHEMA_FILES=ambarella:pl061-gpio.yaml:syscon.yaml:snps-dw-apb-uart.yaml
> - make CHECK_DTBS=y ambarella/cv75-evk.dtb
> - arm64 build of new drivers/DTS
> - CV75 EVK: console via 8250_dw (dw-apb-uart); GPIO edge IRQ
> (gpio-hammer / gpio-event-mon)
>
> Signed-off-by: Long Zhao <longzhao@ambarella.com>
> ---
> Changes in v6:
> - gpio: convert gpio-pl061 data path to gpio-regmap; keep PL061 irqchip
> (Andy, Linus). Add write_data_after_dir + girq helpers to gpio-regmap.
> Ambarella layout uses JEP106 periphid 0x000e8061; no AFSEL clearing in
> the GPIO driver; Ambarella skips unverified GPIO PM save/restore
> - serial: restore 8250_dw Ambarella quirks from v3; drop standalone
> 8250_ambarella (Andy). Commit message clarifies Ambarella IP with a
> DW-like register map needing only a thin quirk. Binding under
> snps-dw-apb-uart; DT uses ambarella,cv75-uart + snps,dw-apb-uart with
> reg-shift/reg-io-width
> - clock/RCT: document #reset-cells (Krzysztof); soft-reset ID header and
> reset provider deferred (no resets= consumers in this series)
> - arm64/Kconfig: do not select ARM_PSCI / HAVE_ARM_ARCH_TIMER (Sashiko)
> - pinctrl: no Ambarella suspend/resume claim without validated PM
>
> Link to v5:
> https://lore.kernel.org/r/20260818-cv75-v5-v5-0-7bbb12f0360f@ambarella.com
> Link to v2:
> https://lore.kernel.org/r/20260806-longzhao-upstream-cv75-v2-v2-0-6b09707c5fe9@ambarella.com
> Link to v3-A:
> https://lore.kernel.org/r/20260813-cv75-v3-a-v3-0-cfdd20b1b4dd@ambarella.com
> Link to v3-B:
> https://lore.kernel.org/r/20260813-cv75-v3-b-v3-0-1d82e18da09b@ambarella.com
> Link to v3-C:
> https://lore.kernel.org/r/20260813-cv75-v3-c-v3-0-9352b3fd6026@ambarella.com
> Link to v4-B:
> https://lore.kernel.org/r/20260814-cv75-v4-b-v4-0-622e63153d97@ambarella.com
>
No change log ?
> To: Arnd Bergmann <arnd@arndb.de>
> To: Krzysztof Kozlowski <krzk@kernel.org>
> To: Alexandre Belloni <alexandre.belloni@bootlin.com>
> To: soc@lists.linux.dev
> To: linux-arm-kernel@lists.infradead.org
> Cc: Rob Herring <robh@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Michael Turquette <mturquette@baylibre.com>
> Cc: Stephen Boyd <sboyd@kernel.org>
> Cc: Linus Walleij <linusw@kernel.org>
> Cc: Bartosz Golaszewski <brgl@kernel.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jiri Slaby <jirislaby@kernel.org>
> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Cc: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Long Zhao <zl020895@163.com>
> Cc: Lee Jones <lee@kernel.org>
> Cc: mfd@lists.linux.dev
> Cc: devicetree@vger.kernel.org
> Cc: linux-clk@vger.kernel.org
> Cc: linux-gpio@vger.kernel.org
> Cc: linux-serial@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
>
> ---
> Long Zhao (13):
> dt-bindings: arm: add Ambarella CV75 platforms
> dt-bindings: mfd: syscon: add Ambarella CV75 secure scratchpad
> dt-bindings: clock: add Ambarella CV75 RCT
> dt-bindings: pinctrl: add Ambarella CV75 pinctrl
> dt-bindings: gpio: pl061: add Ambarella CV75 variant
> dt-bindings: serial: snps-dw-apb-uart: add ambarella,cv75-uart
> clk: ambarella: add CV75 CCU driver
> gpio: regmap: support write_data_after_dir and girq
> gpio: pl061: use gpio-regmap and add Ambarella layout
> pinctrl: ambarella: add CV75 pin controller
> serial: 8250_dw: add Ambarella CV75 quirks
> arm64: ambarella: add ARCH_AMBARELLA and CV75 EVK DT
> MAINTAINERS: add ARM/AMBARELLA SoC support
>
> .../devicetree/bindings/arm/ambarella.yaml | 24 +
> .../bindings/clock/ambarella,cv75-rct.yaml | 64 ++
> .../devicetree/bindings/gpio/pl061-gpio.yaml | 32 +-
> Documentation/devicetree/bindings/mfd/syscon.yaml | 1 +
> .../bindings/pinctrl/ambarella,cv75-pinctrl.yaml | 239 +++++++
> .../bindings/serial/snps-dw-apb-uart.yaml | 1 +
> .../devicetree/bindings/vendor-prefixes.yaml | 2 +
> MAINTAINERS | 14 +
> arch/arm64/Kconfig.platforms | 6 +
> arch/arm64/boot/dts/Makefile | 1 +
> arch/arm64/boot/dts/ambarella/Makefile | 3 +
> arch/arm64/boot/dts/ambarella/cv75-evk.dts | 30 +
> arch/arm64/boot/dts/ambarella/cv75.dtsi | 177 +++++
> arch/arm64/configs/defconfig | 1 +
> drivers/clk/Kconfig | 1 +
> drivers/clk/Makefile | 1 +
> drivers/clk/ambarella/Kconfig | 13 +
> drivers/clk/ambarella/Makefile | 6 +
> drivers/clk/ambarella/ccu-cv75.c | 296 ++++++++
> drivers/clk/ambarella/ccu_common.c | 60 ++
> drivers/clk/ambarella/ccu_common.h | 25 +
> drivers/clk/ambarella/ccu_mux_div.c | 234 +++++++
> drivers/clk/ambarella/ccu_mux_div.h | 35 +
> drivers/clk/ambarella/ccu_pll.c | 421 ++++++++++++
> drivers/clk/ambarella/ccu_pll.h | 70 ++
> drivers/gpio/Kconfig | 2 +
> drivers/gpio/gpio-pl061.c | 342 +++++----
> drivers/gpio/gpio-regmap.c | 24 +-
> drivers/pinctrl/Kconfig | 15 +
> drivers/pinctrl/Makefile | 2 +
> drivers/pinctrl/pinctrl-ambarella-cv75.c | 561 +++++++++++++++
> drivers/pinctrl/pinctrl-ambarella.c | 761 +++++++++++++++++++++
> drivers/pinctrl/pinctrl-ambarella.h | 50 ++
> drivers/tty/serial/8250/8250_dw.c | 34 +
> include/dt-bindings/clock/ambarella,cv75-rct.h | 15 +
> include/linux/amba/bus.h | 1 +
> include/linux/gpio/regmap.h | 13 +
> 37 files changed, 3439 insertions(+), 138 deletions(-)
That is a lot of stuff mixed into a single series that could easily split
> ---
> base-commit: 34cf6dafc47441dfb6b356a095b89c3585a93714
> change-id: 20260818-cv75-v5-9e2039b349bc
>
> Best regards,
> --
> Long Zhao <longzhao@ambarella.com>
>
>
--
Jerome