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[MIPS] time: Add GT641xx timer0 clockevent driver

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And make use of it for Cobalt.  A few others such as the Malta could make
use of it as well.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Yoichi Yuasa
2007-10-22 19:43:15 +09:00
committed by Ralf Baechle
parent d04533650f
commit 1097c6ac33
7 changed files with 193 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/cobalt/Makefile
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@@ -2,7 +2,7 @@
# Makefile for the Cobalt micro systems family specific parts of the kernel
#
obj-y := buttons.o irq.o led.o reset.o rtc.o serial.o setup.o
obj-y := buttons.o irq.o led.o reset.o rtc.o serial.o setup.o time.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_EARLY_PRINTK) += console.o

24
arch/mips/cobalt/setup.c
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@@ -9,19 +9,17 @@
* Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
*
*/
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/i8253.h>
#include <asm/io.h>
#include <asm/reboot.h>
#include <asm/gt64120.h>
#include <cobalt.h>
#include <irq.h>
extern void cobalt_machine_restart(char *command);
extern void cobalt_machine_halt(void);
@@ -41,17 +39,6 @@ const char *get_system_type(void)
return "MIPS Cobalt";
}
void __init plat_timer_setup(struct irqaction *irq)
{
/* Load timer value for HZ (TCLK is 50MHz) */
GT_WRITE(GT_TC0_OFS, 50*1000*1000 / HZ);
/* Enable timer0 */
GT_WRITE(GT_TC_CONTROL_OFS, GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK);
setup_irq(GT641XX_TIMER0_IRQ, irq);
}
/*
* Cobalt doesn't have PS/2 keyboard/mouse interfaces,
* keyboard conntroller is never used.
@@ -84,11 +71,6 @@ static struct resource cobalt_reserved_resources[] = {
},
};
void __init plat_time_init(void)
{
setup_pit_timer();
}
void __init plat_mem_setup(void)
{
int i;

35
arch/mips/cobalt/time.c Normal file
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@@ -0,0 +1,35 @@
/*
* Cobalt time initialization.
*
* Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
#include <asm/gt64120.h>
#include <asm/i8253.h>
#include <asm/time.h>
#define GT641XX_BASE_CLOCK 50000000 /* 50MHz */
void __init plat_time_init(void)
{
setup_pit_timer();
gt641xx_set_base_clock(GT641XX_BASE_CLOCK);
mips_timer_state = gt641xx_timer0_state;
}