The LPC1850 has no less than 3 GPIO interrupt blocks. One of these blocks is called 'gpio pin interrupt' or just PINT. LPC1850 PINT can handle up to 8 interrupts and these have a one-to-one relationship with the main interrupt controller (NVIC).
The interrupts on PINT can be either level or edge trigger and supports any polarity. This patch set adds a irqchip driver for PINT on LPC18xx. This version address the comments from Thomas and Rob. Changes since v1: - use irq_gc_ack_set_bit for edge ack - switch to generic functions on level mask/unmask - use revmap to look up hwirq in handler - describe the interrupts property better in dt doc Joachim Eastwood (2): irqchip: add lpc18xx gpio pin interrupt driver devicetree: document NXP LPC1850 PINT irq controller binding .../interrupt-controller/nxp,lpc1850-gpio-pint.txt | 26 +++ drivers/irqchip/Kconfig | 5 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-lpc18xx-gpio-pint.c | 219 +++++++++++++++++++++ 4 files changed, 251 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/nxp,lpc1850-gpio-pint.txt create mode 100644 drivers/irqchip/irq-lpc18xx-gpio-pint.c -- 2.8.0
