mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-27 05:30:56 +07:00
70d13e083c
Netwinder was using gpio_xxx names which could clash with the GPIO layer. Add a 'nw_' prefix to ensure that these remain separate. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
/*
|
|
* linux/arch/arm/mach-footbridge/dc21285-timer.c
|
|
*
|
|
* Copyright (C) 1998 Russell King.
|
|
* Copyright (C) 1998 Phil Blundell
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/irq.h>
|
|
|
|
#include <asm/hardware/dec21285.h>
|
|
#include <asm/mach/time.h>
|
|
|
|
#include "common.h"
|
|
|
|
/*
|
|
* Footbridge timer 1 support.
|
|
*/
|
|
static unsigned long timer1_latch;
|
|
|
|
static unsigned long timer1_gettimeoffset (void)
|
|
{
|
|
unsigned long value = timer1_latch - *CSR_TIMER1_VALUE;
|
|
|
|
return ((tick_nsec / 1000) * value) / timer1_latch;
|
|
}
|
|
|
|
static irqreturn_t
|
|
timer1_interrupt(int irq, void *dev_id)
|
|
{
|
|
*CSR_TIMER1_CLR = 0;
|
|
|
|
timer_tick();
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction footbridge_timer_irq = {
|
|
.name = "Timer1 timer tick",
|
|
.handler = timer1_interrupt,
|
|
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
|
|
};
|
|
|
|
/*
|
|
* Set up timer interrupt.
|
|
*/
|
|
static void __init footbridge_timer_init(void)
|
|
{
|
|
timer1_latch = (mem_fclk_21285 + 8 * HZ) / (16 * HZ);
|
|
|
|
*CSR_TIMER1_CLR = 0;
|
|
*CSR_TIMER1_LOAD = timer1_latch;
|
|
*CSR_TIMER1_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD | TIMER_CNTL_DIV16;
|
|
|
|
setup_irq(IRQ_TIMER1, &footbridge_timer_irq);
|
|
|
|
isa_rtc_init();
|
|
}
|
|
|
|
struct sys_timer footbridge_timer = {
|
|
.init = footbridge_timer_init,
|
|
.offset = timer1_gettimeoffset,
|
|
};
|