arm64: dts: Revert "specify console via command line"
[linux/fpc-iii.git] / arch / m68k / coldfire / intc-525x.c
blobb23204d059acde3b2b58e384b8f3c8b450acedc0
1 /*
2 * intc2.c -- support for the 2nd INTC controller of the 525x
4 * (C) Copyright 2012, Steven King <sfking@fdwdc.com>
5 * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive
9 * for more details.
12 #include <linux/types.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/io.h>
18 #include <asm/coldfire.h>
19 #include <asm/mcfsim.h>
21 static void intc2_irq_gpio_mask(struct irq_data *d)
23 u32 imr = readl(MCFSIM2_GPIOINTENABLE);
24 u32 type = irqd_get_trigger_type(d);
25 int irq = d->irq - MCF_IRQ_GPIO0;
27 if (type & IRQ_TYPE_EDGE_RISING)
28 imr &= ~(0x001 << irq);
29 if (type & IRQ_TYPE_EDGE_FALLING)
30 imr &= ~(0x100 << irq);
31 writel(imr, MCFSIM2_GPIOINTENABLE);
34 static void intc2_irq_gpio_unmask(struct irq_data *d)
36 u32 imr = readl(MCFSIM2_GPIOINTENABLE);
37 u32 type = irqd_get_trigger_type(d);
38 int irq = d->irq - MCF_IRQ_GPIO0;
40 if (type & IRQ_TYPE_EDGE_RISING)
41 imr |= (0x001 << irq);
42 if (type & IRQ_TYPE_EDGE_FALLING)
43 imr |= (0x100 << irq);
44 writel(imr, MCFSIM2_GPIOINTENABLE);
47 static void intc2_irq_gpio_ack(struct irq_data *d)
49 u32 imr = 0;
50 u32 type = irqd_get_trigger_type(d);
51 int irq = d->irq - MCF_IRQ_GPIO0;
53 if (type & IRQ_TYPE_EDGE_RISING)
54 imr |= (0x001 << irq);
55 if (type & IRQ_TYPE_EDGE_FALLING)
56 imr |= (0x100 << irq);
57 writel(imr, MCFSIM2_GPIOINTCLEAR);
60 static int intc2_irq_gpio_set_type(struct irq_data *d, unsigned int f)
62 if (f & ~IRQ_TYPE_EDGE_BOTH)
63 return -EINVAL;
64 return 0;
67 static struct irq_chip intc2_irq_gpio_chip = {
68 .name = "CF-INTC2",
69 .irq_mask = intc2_irq_gpio_mask,
70 .irq_unmask = intc2_irq_gpio_unmask,
71 .irq_ack = intc2_irq_gpio_ack,
72 .irq_set_type = intc2_irq_gpio_set_type,
75 static int __init mcf_intc2_init(void)
77 int irq;
79 /* set the interrupt base for the second interrupt controller */
80 writel(MCFINTC2_VECBASE, MCFINTC2_INTBASE);
82 /* GPIO interrupt sources */
83 for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO6); irq++) {
84 irq_set_chip(irq, &intc2_irq_gpio_chip);
85 irq_set_handler(irq, handle_edge_irq);
88 return 0;
91 arch_initcall(mcf_intc2_init);