diff options
author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-24 08:41:41 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-24 13:07:53 -0400 |
commit | 816724e65c72a90a44fbad0ef0b59b186c85fa90 (patch) | |
tree | 421fa29aedff988e392f92780637553e275d37a0 /arch/arm/mach-netx/time.c | |
parent | 70ac4385a13f78bc478f26d317511893741b05bd (diff) | |
parent | d384ea691fe4ea8c2dd5b9b8d9042eb181776f18 (diff) |
Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Conflicts:
fs/nfs/inode.c
fs/super.c
Fix conflicts between patch 'NFS: Split fs/nfs/inode.c' and patch
'VFS: Permit filesystem to override root dentry on mount'
Diffstat (limited to 'arch/arm/mach-netx/time.c')
-rw-r--r-- | arch/arm/mach-netx/time.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/arm/mach-netx/time.c b/arch/arm/mach-netx/time.c new file mode 100644 index 000000000000..edfbdf40c600 --- /dev/null +++ b/arch/arm/mach-netx/time.c @@ -0,0 +1,88 @@ +/* + * arch/arm/mach-netx/time.c + * + * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/init.h> +#include <linux/interrupt.h> + +#include <asm/hardware.h> +#include <asm/io.h> +#include <asm/mach/time.h> +#include <asm/arch/netx-regs.h> + +/* + * Returns number of us since last clock interrupt. Note that interrupts + * will have been disabled by do_gettimeoffset() + */ +static unsigned long netx_gettimeoffset(void) +{ + return readl(NETX_GPIO_COUNTER_CURRENT(0)) / 100; +} + +/* + * IRQ handler for the timer + */ +static irqreturn_t +netx_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + write_seqlock(&xtime_lock); + + timer_tick(regs); + write_sequnlock(&xtime_lock); + + /* acknowledge interrupt */ + writel(COUNTER_BIT(0), NETX_GPIO_IRQ); + + return IRQ_HANDLED; +} + + +static struct irqaction netx_timer_irq = { + .name = "NetX Timer Tick", + .flags = SA_INTERRUPT | SA_TIMER, + .handler = netx_timer_interrupt, +}; + +/* + * Set up timer interrupt + */ +static void __init netx_timer_init(void) +{ + /* disable timer initially */ + writel(0, NETX_GPIO_COUNTER_CTRL(0)); + + /* Reset the timer value to zero */ + writel(0, NETX_GPIO_COUNTER_CURRENT(0)); + + writel(LATCH, NETX_GPIO_COUNTER_MAX(0)); + + /* acknowledge interrupt */ + writel(COUNTER_BIT(0), NETX_GPIO_IRQ); + + /* Enable the interrupt in the specific timer register and start timer */ + writel(COUNTER_BIT(0), NETX_GPIO_IRQ_ENABLE); + writel(NETX_GPIO_COUNTER_CTRL_IRQ_EN | NETX_GPIO_COUNTER_CTRL_RUN, + NETX_GPIO_COUNTER_CTRL(0)); + + setup_irq(NETX_IRQ_TIMER0, &netx_timer_irq); +} + +struct sys_timer netx_timer = { + .init = netx_timer_init, + .offset = netx_gettimeoffset, +}; |