[v5,0/9] ARM: Realtek RTD1195/RTD1295/RTD1395 IRQ mux

Hello,

This series adds two IRQ muxes for the Realtek RTD1195, RTD1295 and RTD1395
SoC families.

The implementation is based on register offsets seen in the vendor DT,
split up into two separate nodes, as well as code from QNAP's rtk119x and
Synology's RTD1293/96 GPL code dumps and Banana Bi W2/M4 BSP repositories.

v5 cleans up mask/unmask, ack and naming.

From /proc/interrupts on RTD1195:
 24:        158       iso   2 Edge      ttyS0

From /proc/interrupts on RTD1395:
  9:        110          0          0          0       iso   2 Edge      ttyS0

The chip name now no longer overflows the columns, but irq type is still wrong.

@Realtek: Patch 8/9 contains a question about RTD1395.

More experimental patches at:
https://github.com/afaerber/linux/commits/rtd1295-next

Have a lot of fun!

Cheers,
Andreas

v4 -> v5:
* Renamed enable/disable to unmask/mask (Marc)
* Factored out ack (Marc)
* Clear all interrupts
* Mapped RTD1195 WDOG_NMI
* Added and mapped RTD1295 WDOG_NMI
* Suppress mapping NMIs and reserved bits (Marc)
* Drop mask checks in mask/unmask (Marc)
* Drop mask check in interrupt handler
* Renamed RTD1295 misc bits with MIS_ for consistency
* Renamed RTD1395 misc bits from MISC_ to MIS_ for consistency
* Renamed irq_chip to distinguish iso vs. misc
* Implemented .irq_get_irqchip_state

v3 -> v4:
* Drop no-op .irq_set_affinity callback (Thomas)
* Disable all interrupts (James)
* Updated SPDX-License-identifier
* Use tabular formatting (Thomas)
* Adopt different braces style (Thomas)
* Use raw_spinlock_t (Thomas)
* Shortened callback name (Thomas)
* Fixed of_iomap() error handling
* Don't mask unmapped NMIs
* Cache SCPU_INT_EN (Thomas)
* Renamed binding and source files
* Dropped UART1/UART2 TO interrupts
* Expanded commit messages
* Added RTD1395 patches

v2 -> v3:
* Rebased, adding nodes to rtd129x.dtsi instead of rtd1295.dtsi
* Adopted {readl,writel}_relaxed() (Marc)
* Adopted spin_lock_irqsave() (Marc)
* Implemented RTD1195
* Implemented mapping for non-linear bits such as i2c3

v1 -> v2:
* Rebased, avoiding dependency on reset series for DT nodes
* Don't forward set_affinity to GIC (Marc)
* Added more spinlocks (Marc)
* Code cleanups
* Investigated quirk
* Fixed spinlock initialization (Andrew)

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <maz@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Aleix Roca Nonell <kernelrocks@gmail.com>
Cc: James Tai <james.tai@realtek.com>

Andreas Färber (9):
  dt-bindings: interrupt-controller: Add Realtek RTD1195/RTD1295 mux
  irqchip: Add Realtek RTD1295 mux driver
  irqchip: rtd1195-mux: Implement irq_get_irqchip_state
  arm64: dts: realtek: rtd129x: Add irq muxes and UART interrupts
  irqchip: rtd1195-mux: Add RTD1195 definitions
  ARM: dts: rtd1195: Add irq muxes and UART interrupts
  dt-bindings: interrupt-controller: rtd1195-mux: Add RTD1395
  irqchip: rtd1195-mux: Add RTD1395 definitions
  arm64: dts: realtek: rtd139x: Add irq muxes and UART interrupts

 .../interrupt-controller/realtek,rtd1195-mux.yaml  |  55 +++
 arch/arm/boot/dts/rtd1195.dtsi                     |  20 +
 arch/arm64/boot/dts/realtek/rtd129x.dtsi           |  22 +
 arch/arm64/boot/dts/realtek/rtd139x.dtsi           |  22 +
 drivers/irqchip/Makefile                           |   1 +
 drivers/irqchip/irq-rtd1195-mux.c                  | 512 +++++++++++++++++++++
 6 files changed, 632 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/realtek,rtd1195-mux.yaml
 create mode 100644 drivers/irqchip/irq-rtd1195-mux.c