linux-kernel - [PATCH v6 0/3] Deprecate interrupt-map for realtek-rtl IRQ driver

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Date:   Mon, 19 Sep 2022 22:24:40 +0200
From:   Sander Vanheule <sander@...nheule.net>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Sander Vanheule <sander@...nheule.net>
Subject: [PATCH v6 0/3] Deprecate interrupt-map for realtek-rtl IRQ driver

The original implementation for this interrupt controller/router used
an interrupt-map parser to determine which parent interrupts were
present. However, this controller is not transparent, so a list of
parent interrupts seems more appropriate, while also getting rid of the
assumed routing to parent interrupts.

Changes since v5:
Link: https://lore.kernel.org/all/cover.1644864700.git.sander@svanheule.net/

- Allow interrupt-map for new compatibles, but mark as deprecated
- Change back to single-cell interrupt specifiers
- Drop patch adding a domain for every output line

Changes since v4:
Link: https://lore.kernel.org/all/cover.1644165421.git.sander@svanheule.net/

- Add Rob's Reviewed-by
- Use irq_domain_add_linear instead of irq_domain_add_simple
- Drop 'inline' specifiers from static functions
- Drop WARN in intc_select() to only warn once for old bindings

Changes since v3:
Link: https://lore.kernel.org/all/cover.1641739718.git.sander@svanheule.net/

- Patches with fixes were merged, so these are no longer included.
- Update the devicetree changes to more clearly indicate the controller
  is not transparent.

Changes since v2 (RFC):
Link: https://lore.kernel.org/all/cover.1640548009.git.sander@svanheule.net/

- Define new, two-part compatibles for devicetree bindings. The existing format
  is kept for the old one-part compatible, but deprecated. New compatibles will
  require a different way of specifying parent interrupts and interrupt routing.
- Add change to handle all pending SoC interrupts in one go.

Changes since v1 (RFC):
Link: https://lore.kernel.org/all/cover.1640261161.git.sander@svanheule.net/

- Split some of the changes to limit the patch scope to one issue.
- Dropped some small (spurious or unneeded) changes
- Instead of dropping/replacing interrupt-map, the last patches now provide an
  implementation that amends the current situtation.

Sander Vanheule (3):
  irqchip/realtek-rtl: use irq_domain_add_linear
  dt-bindings: interrupt-controller: realtek,rtl-intc: require parents
  irqchip/realtek-rtl: use parent interrupts

 .../realtek,rtl-intc.yaml                     |  60 ++++++--
 drivers/irqchip/irq-realtek-rtl.c             | 134 ++++++++----------
 2 files changed, 106 insertions(+), 88 deletions(-)

-- 
2.37.3