7e11828c6e
Created a new directory called bsp (board support package) to hold board or system on chip specific code. The idea is the following. Change-Id: Ica5886806940facae2fa5492fcc938b3c2b989be
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/*
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* This is a mini driver for the AM335X Real Time Clock. The majority of the
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* work is done in user space in readclock, but for power-off the clock needs
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* to be put into run mode at the last possible moment in arch_reset.c. This
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* driver just implements mapping the memory and re-starting the clock.
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*/
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#include <assert.h>
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#include <sys/types.h>
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#include <machine/cpu.h>
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#include <minix/type.h>
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#include <minix/board.h>
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#include <io.h>
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#include "kernel/kernel.h"
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#include "kernel/proc.h"
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#include "kernel/vm.h"
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#include "kernel/proto.h"
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#include "arch_proto.h"
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#include "omap_rtc.h"
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#define RTC_SS_BASE 0x44e3e000
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#define RTC_SS_SIZE 0x1000
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#define RTC_CTRL_REG 0x40
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#define RTC_CTRL_RTC_STOP_BIT 0
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struct omap_rtc
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{
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vir_bytes base;
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vir_bytes size;
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};
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static struct omap_rtc omap_rtc = {
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.base = RTC_SS_BASE,
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.size = RTC_SS_SIZE
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};
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static kern_phys_map rtc_phys_map;
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void
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omap3_rtc_init(void)
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{
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if (BOARD_IS_BB(machine.board_id)) {
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kern_phys_map_ptr(omap_rtc.base, omap_rtc.size, &rtc_phys_map,
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(vir_bytes) &omap_rtc.base);
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}
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}
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void
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omap3_rtc_run(void)
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{
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if (BOARD_IS_BB(machine.board_id)) {
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/* Setting the stop bit starts the RTC running */
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mmio_set((omap_rtc.base + RTC_CTRL_REG), (1 << RTC_CTRL_RTC_STOP_BIT));
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}
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}
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