This patch set extends the functionality of the irq-brcmstb-l2 interrupt controller driver to cover a hardware variant first introduced in the BCM7271 SoC. The main difference between this variant and the block found in earlier brcmstb SoCs is that this variant only supports level sensitive interrupts and therefore does not latch the interrupt state based on edges. Since there is no longer a need to ack interrupts with a register write to clear the latch the register map has been changed. Therefore the change to add support for the new hardware block is to abstract the register accesses to accommodate different maps and to identify the block with a new device-tree compatible string. I also took the opportunity to make some small efficiency enhancements to the driver. One of these was to make use of the slightly more efficient irq_mask_ack method. However, I discovered that the defined irq_gc_mask_disable_reg_and_ack() generic irq function was insufficient for my needs. Previous submissions offered candidate solutions to address my needs within the generic irqchip library, but since those submissions appear to have stalled I am submitting this version that includes the function in the driver to prevent controversy and allow the new functionality to be included. Changes in v4: - The first three commits were removed from the patch set to remove any dependencies on changing the generic irqchip or irqchip-tango imple- mentations. If there is a will to make those changes in the future they can be applied at that time, but they needn't hold up the accept- ance of this patch set. Changes in v3: - I did not submit a v3 patch set, but Marc Gonzalez included a PATCH v3 in a response to the v2 patch so I am skipping ahead to v4 to avoid confusion. Changes in v2: - removed unused permutations of irq_mask_ack methods - added Reviewed-by and Acked-by responses from first submission Doug Berger (3): irqchip: brcmstb-l2: Remove some processing from the handler irqchip: brcmstb-l2: Abstract register accesses irqchip: brcmstb-l2: Add support for the BCM7271 L2 controller .../bindings/interrupt-controller/brcm,l2-intc.txt | 3 +- drivers/irqchip/irq-brcmstb-l2.c | 171 +++++++++++++++------ 2 files changed, 126 insertions(+), 48 deletions(-) -- 2.14.1
