From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-arm/arch-l7200/time.h | 72 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 include/asm-arm/arch-l7200/time.h (limited to 'include/asm-arm/arch-l7200/time.h') diff --git a/include/asm-arm/arch-l7200/time.h b/include/asm-arm/arch-l7200/time.h new file mode 100644 index 00000000000..7b98b533e63 --- /dev/null +++ b/include/asm-arm/arch-l7200/time.h @@ -0,0 +1,72 @@ +/* + * linux/include/asm-arm/arch-l7200/time.h + * + * Copyright (C) 2000 Rob Scott (rscott@mtrob.fdns.net) + * Steve Hill (sjhill@cotw.com) + * + * Changelog: + * 01-02-2000 RS Created l7200 version, derived from rpc code + * 05-03-2000 SJH Complete rewrite + */ +#ifndef _ASM_ARCH_TIME_H +#define _ASM_ARCH_TIME_H + +#include + +/* + * RTC base register address + */ +#define RTC_BASE (IO_BASE_2 + 0x2000) + +/* + * RTC registers + */ +#define RTC_RTCDR (*(volatile unsigned char *) (RTC_BASE + 0x000)) +#define RTC_RTCMR (*(volatile unsigned char *) (RTC_BASE + 0x004)) +#define RTC_RTCS (*(volatile unsigned char *) (RTC_BASE + 0x008)) +#define RTC_RTCC (*(volatile unsigned char *) (RTC_BASE + 0x008)) +#define RTC_RTCDV (*(volatile unsigned char *) (RTC_BASE + 0x00c)) +#define RTC_RTCCR (*(volatile unsigned char *) (RTC_BASE + 0x010)) + +/* + * RTCCR register values + */ +#define RTC_RATE_32 0x00 /* 32 Hz tick */ +#define RTC_RATE_64 0x10 /* 64 Hz tick */ +#define RTC_RATE_128 0x20 /* 128 Hz tick */ +#define RTC_RATE_256 0x30 /* 256 Hz tick */ +#define RTC_EN_ALARM 0x01 /* Enable alarm */ +#define RTC_EN_TIC 0x04 /* Enable counter */ +#define RTC_EN_STWDOG 0x08 /* Enable watchdog */ + +/* + * Handler for RTC timer interrupt + */ +static irqreturn_t +timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + do_timer(regs); +#ifndef CONFIG_SMP + update_process_times(user_mode(regs)); +#endif + do_profile(regs); + RTC_RTCC = 0; /* Clear interrupt */ + + return IRQ_HANDLED; +} + +/* + * Set up RTC timer interrupt, and return the current time in seconds. + */ +void __init time_init(void) +{ + RTC_RTCC = 0; /* Clear interrupt */ + + timer_irq.handler = timer_interrupt; + + setup_irq(IRQ_RTC_TICK, &timer_irq); + + RTC_RTCCR = RTC_RATE_128 | RTC_EN_TIC; /* Set rate and enable timer */ +} + +#endif -- cgit v1.2.3