xref: /openbmc/linux/arch/sh/boards/mach-sdk7786/irq.c (revision aaf9128a)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * SDK7786 FPGA IRQ Controller Support.
4  *
5  * Copyright (C) 2010  Matt Fleming
6  * Copyright (C) 2010  Paul Mundt
7  */
8 #include <linux/irq.h>
9 #include <mach/fpga.h>
10 #include <mach/irq.h>
11 
12 enum {
13 	ATA_IRQ_BIT		= 1,
14 	SPI_BUSY_BIT		= 2,
15 	LIRQ5_BIT		= 3,
16 	LIRQ6_BIT		= 4,
17 	LIRQ7_BIT		= 5,
18 	LIRQ8_BIT		= 6,
19 	KEY_IRQ_BIT		= 7,
20 	PEN_IRQ_BIT		= 8,
21 	ETH_IRQ_BIT		= 9,
22 	RTC_ALARM_BIT		= 10,
23 	CRYSTAL_FAIL_BIT	= 12,
24 	ETH_PME_BIT		= 14,
25 };
26 
sdk7786_init_irq(void)27 void __init sdk7786_init_irq(void)
28 {
29 	unsigned int tmp;
30 
31 	/* Enable priority encoding for all IRLs */
32 	fpga_write_reg(fpga_read_reg(INTMSR) | 0x0303, INTMSR);
33 
34 	/* Clear FPGA interrupt status registers */
35 	fpga_write_reg(0x0000, INTASR);
36 	fpga_write_reg(0x0000, INTBSR);
37 
38 	/* Unmask FPGA interrupts */
39 	tmp = fpga_read_reg(INTAMR);
40 	tmp &= ~(1 << ETH_IRQ_BIT);
41 	fpga_write_reg(tmp, INTAMR);
42 
43 	plat_irq_setup_pins(IRQ_MODE_IRL7654_MASK);
44 	plat_irq_setup_pins(IRQ_MODE_IRL3210_MASK);
45 }
46