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https://github.com/edk2-porting/linux-next.git
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07bd1a6cc7
This patch bases on the one from Daniel Mack. The most important change to Daniel's patch is to be more generic. This gpio routine supports at least the i.MX27 and i.MX31 processors. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Acked-by: Daniel Mack <daniel@caiaq.de>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/mach/irq.h>
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#include <asm/arch/common.h>
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/* Disable interrupt number "irq" in the AVIC */
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static void mxc_mask_irq(unsigned int irq)
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{
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__raw_writel(irq, AVIC_INTDISNUM);
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}
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/* Enable interrupt number "irq" in the AVIC */
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static void mxc_unmask_irq(unsigned int irq)
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{
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__raw_writel(irq, AVIC_INTENNUM);
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}
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static struct irq_chip mxc_avic_chip = {
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.mask_ack = mxc_mask_irq,
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.mask = mxc_mask_irq,
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.unmask = mxc_unmask_irq,
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};
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/*
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* This function initializes the AVIC hardware and disables all the
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* interrupts. It registers the interrupt enable and disable functions
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* to the kernel for each interrupt source.
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*/
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void __init mxc_init_irq(void)
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{
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int i;
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u32 reg;
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/* put the AVIC into the reset value with
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* all interrupts disabled
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*/
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__raw_writel(0, AVIC_INTCNTL);
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__raw_writel(0x1f, AVIC_NIMASK);
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/* disable all interrupts */
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__raw_writel(0, AVIC_INTENABLEH);
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__raw_writel(0, AVIC_INTENABLEL);
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/* all IRQ no FIQ */
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__raw_writel(0, AVIC_INTTYPEH);
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__raw_writel(0, AVIC_INTTYPEL);
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for (i = 0; i < MXC_MAX_INT_LINES; i++) {
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set_irq_chip(i, &mxc_avic_chip);
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set_irq_handler(i, handle_level_irq);
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set_irq_flags(i, IRQF_VALID);
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}
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/* Set WDOG2's interrupt the highest priority level (bit 28-31) */
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reg = __raw_readl(AVIC_NIPRIORITY6);
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reg |= (0xF << 28);
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__raw_writel(reg, AVIC_NIPRIORITY6);
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/* init architectures chained interrupt handler */
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mxc_register_gpios();
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printk(KERN_INFO "MXC IRQ initialized\n");
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}
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