1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/interrupt-controller/st,spear300-shirq.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: SPEAr3xx Shared IRQ controller 8 9maintainers: 10 - Viresh Kumar <vireshk@kernel.org> 11 - Shiraz Hashim <shiraz.linux.kernel@gmail.com> 12 13description: | 14 SPEAr3xx architecture includes shared/multiplexed irqs for certain set of 15 devices. The multiplexor provides a single interrupt to parent interrupt 16 controller (VIC) on behalf of a group of devices. 17 18 There can be multiple groups available on SPEAr3xx variants but not exceeding 19 4. The number of devices in a group can differ, further they may share same 20 set of status/mask registers spanning across different bit masks. Also in some 21 cases the group may not have enable or other registers. This makes software 22 little complex. 23 24 A single node in the device tree is used to describe the shared interrupt 25 multiplexer (one node for all groups). A group in the interrupt controller 26 shares config/control registers with other groups. For example, a 32-bit 27 interrupt enable/disable config register can accommodate up to 4 interrupt 28 groups. 29 30properties: 31 compatible: 32 enum: 33 - st,spear300-shirq 34 - st,spear310-shirq 35 - st,spear320-shirq 36 37 reg: 38 maxItems: 1 39 40 '#interrupt-cells': 41 const: 1 42 43 interrupt-controller: true 44 45 interrupts: 46 description: Interrupt specifier array for SHIRQ groups 47 minItems: 1 48 maxItems: 4 49 50required: 51 - compatible 52 - reg 53 - '#interrupt-cells' 54 - interrupt-controller 55 - interrupts 56 57additionalProperties: false 58 59examples: 60 - | 61 interrupt-controller@b3000000 { 62 compatible = "st,spear320-shirq"; 63 reg = <0xb3000000 0x1000>; 64 interrupts = <28 29 30 1>; 65 #interrupt-cells = <1>; 66 interrupt-controller; 67 }; 68