[PATCH v3 0/3] ARM: oxnas support removal

[PATCH v3 0/3] ARM: oxnas support removal

[Neil Armstrong]

With [1] removing MPCore SMP support, this makes the OX820 barely usable,
associated with a clear lack of maintainance, development and migration to
dt-schema it's clear that Linux support for OX810 and OX820 should be removed.

In addition, the OX810 hasn't been booted for years and isn't even present
in an ARM config file.

For the OX820, lack of USB and SATA support makes the platform not usable
in the current Linux support and relies on off-tree drivers hacked from the
vendor (defunct for years) sources.

The last users are in the OpenWRT distribution, and today's removal means
support will still be in stable 6.1 LTS kernel until end of 2026.

If someone wants to take over the development even with lack of SMP, I'll
be happy to hand off maintainance.

It has been a fun time adding support for this architecture, but it's time
to get over!

I'll send the remaining patches in a final PR.

---
Changes in v3:
- Removed applied patches
- Moved net & pinctrl to a separate patchset
- Added Andy's tags
- Link to v2: https://lore.kernel.org/r/20230630-topic-oxnas-upstream-remove-v2-0-fb6ab3dea87c@linaro.org

Changes in v2:
- s/maintainance/maintenance/
- added acked/review tags
- dropped already applied patches
- drop RFC
- Link to v1: https://lore.kernel.org/r/20230331-topic-oxnas-upstream-remove-v1-0-5bd58fd1dd1f@linaro.org

---
Neil Armstrong (3):
      irqchip: irq-versatile-fpga: remove obsolete oxnas compatible
      dt-bindings: interrupt-controller: arm,versatile-fpga-irq: mark oxnas compatible as deprecated
      MAINTAINERS: remove OXNAS entry

 .../bindings/interrupt-controller/arm,versatile-fpga-irq.txt   |  4 +++-
 MAINTAINERS                                                    | 10 ----------
 drivers/irqchip/irq-versatile-fpga.c                           |  1 -
 3 files changed, 3 insertions(+), 12 deletions(-)
---
base-commit: 21ef7b1e17d039053edaeaf41142423810572741
change-id: 20230331-topic-oxnas-upstream-remove-a62e9d96feee

Best regards,
-- 
Neil Armstrong <neil.armstrong@linaro.org>

[PATCH v3 1/3] irqchip: irq-versatile-fpga: remove obsolete oxnas compatible

[Neil Armstrong]

Due to lack of maintenance and stall of development for a few years now,
and since no new features will ever be added upstream, remove support
for OX810 and OX820 IRQ controller.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/irqchip/irq-versatile-fpga.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c
index ba543ed9c154..5018a06060e6 100644
--- a/drivers/irqchip/irq-versatile-fpga.c
+++ b/drivers/irqchip/irq-versatile-fpga.c
@@ -242,5 +242,4 @@ static int __init fpga_irq_of_init(struct device_node *node,
 }
 IRQCHIP_DECLARE(arm_fpga, "arm,versatile-fpga-irq", fpga_irq_of_init);
 IRQCHIP_DECLARE(arm_fpga_sic, "arm,versatile-sic", fpga_irq_of_init);
-IRQCHIP_DECLARE(ox810se_rps, "oxsemi,ox810se-rps-irq", fpga_irq_of_init);
 #endif

-- 
2.34.1

[PATCH v3 2/3] dt-bindings: interrupt-controller: arm,versatile-fpga-irq: mark oxnas compatible as deprecated

[Neil Armstrong]

Due to lack of maintenance and stall of development for a few years now,
and since no new features will ever be added upstream, mark the
OX810 and OX820 IRQ compatible as deprecated.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 .../bindings/interrupt-controller/arm,versatile-fpga-irq.txt          | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,versatile-fpga-irq.txt b/Documentation/devicetree/bindings/interrupt-controller/arm,versatile-fpga-irq.txt
index 2a1d16bdf834..ea939f54c5eb 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,versatile-fpga-irq.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,versatile-fpga-irq.txt
@@ -6,7 +6,7 @@ controllers are OR:ed together and fed to the CPU tile's IRQ input. Each
 instance can handle up to 32 interrupts.
 
 Required properties:
-- compatible: "arm,versatile-fpga-irq" or "oxsemi,ox810se-rps-irq"
+- compatible: "arm,versatile-fpga-irq"
 - interrupt-controller: Identifies the node as an interrupt controller
 - #interrupt-cells: The number of cells to define the interrupts.  Must be 1
   as the FPGA IRQ controller has no configuration options for interrupt
@@ -19,6 +19,8 @@ Required properties:
   the system till not make it possible for devices to request these
   interrupts.
 
+The "oxsemi,ox810se-rps-irq" compatible is deprecated.
+
 Example:
 
 pic: pic@14000000 {

-- 
2.34.1

[PATCH v3 3/3] MAINTAINERS: remove OXNAS entry

[Neil Armstrong]

Due to lack of maintenance and stall of development for a few years now,
and since no new features will ever be added upstream, remove MAINTAINERS
entry for OXNAS files.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 MAINTAINERS | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 02a3192195af..c8258178f19a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2506,16 +2506,6 @@ S:	Maintained
 W:	http://www.digriz.org.uk/ts78xx/kernel
 F:	arch/arm/mach-orion5x/ts78xx-*
 
-ARM/OXNAS platform support
-M:	Neil Armstrong <neil.armstrong@linaro.org>
-L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-L:	linux-oxnas@groups.io (moderated for non-subscribers)
-S:	Maintained
-F:	arch/arm/boot/dts/ox8*.dts*
-F:	arch/arm/mach-oxnas/
-F:	drivers/power/reset/oxnas-restart.c
-N:	oxnas
-
 ARM/QUALCOMM CHROMEBOOK SUPPORT
 R:	cros-qcom-dts-watchers@chromium.org
 F:	arch/arm64/boot/dts/qcom/sc7180*

-- 
2.34.1

Re: [PATCH v3 0/3] ARM: oxnas support removal

[Neil Armstrong]

Hi,

On Mon, 14 Aug 2023 10:19:51 +0200, Neil Armstrong wrote:
> With [1] removing MPCore SMP support, this makes the OX820 barely usable,
> associated with a clear lack of maintainance, development and migration to
> dt-schema it's clear that Linux support for OX810 and OX820 should be removed.
> 
> In addition, the OX810 hasn't been booted for years and isn't even present
> in an ARM config file.
> 
> [...]

Thanks, Applied to https://git.kernel.org/pub/scm/linux/kernel/git/narmstrong/linux-oxnas.git (v6.6/final)

[1/3] irqchip: irq-versatile-fpga: remove obsolete oxnas compatible
      https://git.kernel.org/narmstrong/linux-oxnas/c/33e839adabedb3a958efe5d974e38e868f7a8584
[2/3] dt-bindings: interrupt-controller: arm,versatile-fpga-irq: mark oxnas compatible as deprecated
      https://git.kernel.org/narmstrong/linux-oxnas/c/5f784ff8376dd519bbe317174972423508b627c4
[3/3] MAINTAINERS: remove OXNAS entry
      https://git.kernel.org/narmstrong/linux-oxnas/c/b1627ad5f457c8cea08bb2ab6b24d1c0381fbe30

These changes has been applied on the intermediate git tree [1].

The v6.6/final branch will then be sent via a formal Pull Request to the Linux SoC maintainers
for inclusion in their intermediate git branches in order to be sent to Linus during
the next merge window, or sooner if it's a set of fixes.

In the cases of fixes, those will be merged in the current release candidate
kernel and as soon they appear on the Linux master branch they will be
backported to the previous Stable and Long-Stable kernels [2].

The intermediate git branches are merged daily in the linux-next tree [3],
people are encouraged testing these pre-release kernels and report issues on the
relevant mailing-lists.

If problems are discovered on those changes, please submit a signed-off-by revert
patch followed by a corrective changeset.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/narmstrong/linux-oxnas.git
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
[3] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

-- 
Neil