mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
ab5ab9dbe6
This commit switches the Orion5x platforms described through DT to use a DT-defined interrupt controller and timer. This involves: * Describing in the DT the bridge interrupt controller, which is a child interrupt controller to the main one, which is used for timer and watchdog interrupts. * Describing in the DT the timer. * Adding in the DT the interrupt specifications for the watchdog. * Selecting the ORION_IRQCHIP and ORION_TIMER drivers to be compiled. * Change board-dt.c to no longer have an ->init_time() callback, since the default callback will work fine: it calls clocksource_of_init() and of_clk_init(), as needed. * Implement a multi-IRQ handler for non-DT platforms in mach-orion5x/irq.c. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Link: https://lkml.kernel.org/r/1398202002-28530-24-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/*
|
|
* arch/arm/mach-orion5x/irq.c
|
|
*
|
|
* Core IRQ functions for Marvell Orion System On Chip
|
|
*
|
|
* Maintainer: Tzachi Perelstein <tzachi@marvell.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
#include <linux/gpio.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/io.h>
|
|
#include <mach/bridge-regs.h>
|
|
#include <plat/orion-gpio.h>
|
|
#include <plat/irq.h>
|
|
#include <asm/exception.h>
|
|
#include "common.h"
|
|
|
|
static int __initdata gpio0_irqs[4] = {
|
|
IRQ_ORION5X_GPIO_0_7,
|
|
IRQ_ORION5X_GPIO_8_15,
|
|
IRQ_ORION5X_GPIO_16_23,
|
|
IRQ_ORION5X_GPIO_24_31,
|
|
};
|
|
|
|
#ifdef CONFIG_MULTI_IRQ_HANDLER
|
|
/*
|
|
* Compiling with both non-DT and DT support enabled, will
|
|
* break asm irq handler used by non-DT boards. Therefore,
|
|
* we provide a C-style irq handler even for non-DT boards,
|
|
* if MULTI_IRQ_HANDLER is set.
|
|
*/
|
|
|
|
asmlinkage void
|
|
__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
|
|
{
|
|
u32 stat;
|
|
|
|
stat = readl_relaxed(MAIN_IRQ_CAUSE);
|
|
stat &= readl_relaxed(MAIN_IRQ_MASK);
|
|
if (stat) {
|
|
unsigned int hwirq = __fls(stat);
|
|
handle_IRQ(hwirq, regs);
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void __init orion5x_init_irq(void)
|
|
{
|
|
orion_irq_init(0, MAIN_IRQ_MASK);
|
|
|
|
#ifdef CONFIG_MULTI_IRQ_HANDLER
|
|
set_handle_irq(orion5x_legacy_handle_irq);
|
|
#endif
|
|
|
|
/*
|
|
* Initialize gpiolib for GPIOs 0-31.
|
|
*/
|
|
orion_gpio_init(NULL, 0, 32, GPIO_VIRT_BASE, 0,
|
|
IRQ_ORION5X_GPIO_START, gpio0_irqs);
|
|
}
|