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65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2002
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* Lineo, Inc. <www.lineo.com>
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* Bernhard Kuhn <bkuhn@lineo.com>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*/
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#include <common.h>
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#include <init.h>
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#include <time.h>
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#include <asm/global_data.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/at91_tc.h>
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#include <asm/arch/clk.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* the number of clocks per CONFIG_SYS_HZ */
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#define TIMER_LOAD_VAL (CFG_SYS_HZ_CLOCK/CONFIG_SYS_HZ)
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int timer_init(void)
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{
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at91_tc_t *tc = (at91_tc_t *) ATMEL_BASE_TC;
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at91_periph_clk_enable(ATMEL_ID_TC0);
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writel(0, &tc->bcr);
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writel(AT91_TC_BMR_TC0XC0S_NONE | AT91_TC_BMR_TC1XC1S_NONE |
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AT91_TC_BMR_TC2XC2S_NONE , &tc->bmr);
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writel(AT91_TC_CCR_CLKDIS, &tc->tc[0].ccr);
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/* set to MCLK/2 and restart the timer
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when the value in TC_RC is reached */
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writel(AT91_TC_CMR_TCCLKS_CLOCK1 | AT91_TC_CMR_CPCTRG, &tc->tc[0].cmr);
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writel(0xFFFFFFFF, &tc->tc[0].idr); /* disable interrupts */
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writel(TIMER_LOAD_VAL, &tc->tc[0].rc);
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writel(AT91_TC_CCR_SWTRG | AT91_TC_CCR_CLKEN, &tc->tc[0].ccr);
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gd->arch.lastinc = 0;
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gd->arch.tbl = 0;
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return 0;
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}
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/*
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* timer without interrupts
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*/
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ulong get_timer_raw(void)
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{
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at91_tc_t *tc = (at91_tc_t *) ATMEL_BASE_TC;
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u32 now;
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now = readl(&tc->tc[0].cv) & 0x0000ffff;
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if (now >= gd->arch.lastinc) {
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/* normal mode */
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gd->arch.tbl += now - gd->arch.lastinc;
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} else {
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/* we have an overflow ... */
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gd->arch.tbl += now + TIMER_LOAD_VAL - gd->arch.lastinc;
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}
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gd->arch.lastinc = now;
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return gd->arch.tbl;
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}
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static ulong get_timer_masked(void)
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{
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return get_timer_raw()/TIMER_LOAD_VAL;
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}
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ulong get_timer(ulong base)
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{
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return get_timer_masked() - base;
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}
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void __udelay(unsigned long usec)
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{
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u32 tmo;
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u32 endtime;
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signed long diff;
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tmo = CFG_SYS_HZ_CLOCK / 1000;
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tmo *= usec;
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tmo /= 1000;
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endtime = get_timer_raw() + tmo;
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do {
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u32 now = get_timer_raw();
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diff = endtime - now;
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} while (diff >= 0);
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}
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/*
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* This function is derived from PowerPC code (read timebase as long long).
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* On ARM it just returns the timer value.
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*/
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unsigned long long get_ticks(void)
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{
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return get_timer(0);
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}
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/*
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* This function is derived from PowerPC code (timebase clock frequency).
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* On ARM it returns the number of timer ticks per second.
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*/
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ulong get_tbclk(void)
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{
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return CONFIG_SYS_HZ;
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}
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