ARM: SAMSUNG: Remove unused plat-samsung/time.c
Signed-off-by: Naour Romain <romain.naour@openwide.fr> Reviewed-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Romain Naour
Kukjin Kim
parent
6a5a2e3b0d
commit
ad38bdd15d
|
|
@ -12,7 +12,6 @@ obj- :=
|
|||
# Objects we always build independent of SoC choice
|
||||
|
||||
obj-y += init.o cpu.o
|
||||
obj-$(CONFIG_ARCH_USES_GETTIMEOFFSET) += time.o
|
||||
obj-$(CONFIG_SAMSUNG_HRT) += samsung-time.o
|
||||
|
||||
obj-$(CONFIG_SAMSUNG_CLOCK) += clock.o
|
||||
|
|
|
|||
|
|
@ -192,10 +192,6 @@ extern void s3c24xx_init_uartdevs(char *name,
|
|||
struct s3c24xx_uart_resources *res,
|
||||
struct s3c2410_uartcfg *cfg, int no);
|
||||
|
||||
/* timer for s5pc100 only */
|
||||
|
||||
extern void s3c24xx_timer_init(void);
|
||||
|
||||
extern struct syscore_ops s3c2410_pm_syscore_ops;
|
||||
extern struct syscore_ops s3c2412_pm_syscore_ops;
|
||||
extern struct syscore_ops s3c2416_pm_syscore_ops;
|
||||
|
|
|
|||
|
|
@ -1,287 +0,0 @@
|
|||
/* linux/arch/arm/plat-samsung/time.c
|
||||
*
|
||||
* Copyright (C) 2003-2005 Simtec Electronics
|
||||
* Ben Dooks, <ben@simtec.co.uk>
|
||||
*
|
||||
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/syscore_ops.h>
|
||||
|
||||
#include <asm/mach-types.h>
|
||||
|
||||
#include <asm/irq.h>
|
||||
#include <mach/map.h>
|
||||
#include <plat/regs-timer.h>
|
||||
#include <mach/regs-irq.h>
|
||||
#include <asm/mach/time.h>
|
||||
#include <mach/tick.h>
|
||||
|
||||
#include <plat/clock.h>
|
||||
#include <plat/cpu.h>
|
||||
|
||||
static unsigned long timer_startval;
|
||||
static unsigned long timer_usec_ticks;
|
||||
|
||||
#ifndef TICK_MAX
|
||||
#define TICK_MAX (0xffff)
|
||||
#endif
|
||||
|
||||
#define TIMER_USEC_SHIFT 16
|
||||
|
||||
/* we use the shifted arithmetic to work out the ratio of timer ticks
|
||||
* to usecs, as often the peripheral clock is not a nice even multiple
|
||||
* of 1MHz.
|
||||
*
|
||||
* shift of 14 and 15 are too low for the 12MHz, 16 seems to be ok
|
||||
* for the current HZ value of 200 without producing overflows.
|
||||
*
|
||||
* Original patch by Dimitry Andric, updated by Ben Dooks
|
||||
*/
|
||||
|
||||
|
||||
/* timer_mask_usec_ticks
|
||||
*
|
||||
* given a clock and divisor, make the value to pass into timer_ticks_to_usec
|
||||
* to scale the ticks into usecs
|
||||
*/
|
||||
|
||||
static inline unsigned long
|
||||
timer_mask_usec_ticks(unsigned long scaler, unsigned long pclk)
|
||||
{
|
||||
unsigned long den = pclk / 1000;
|
||||
|
||||
return ((1000 << TIMER_USEC_SHIFT) * scaler + (den >> 1)) / den;
|
||||
}
|
||||
|
||||
/* timer_ticks_to_usec
|
||||
*
|
||||
* convert timer ticks to usec.
|
||||
*/
|
||||
|
||||
static inline unsigned long timer_ticks_to_usec(unsigned long ticks)
|
||||
{
|
||||
unsigned long res;
|
||||
|
||||
res = ticks * timer_usec_ticks;
|
||||
res += 1 << (TIMER_USEC_SHIFT - 4); /* round up slightly */
|
||||
|
||||
return res >> TIMER_USEC_SHIFT;
|
||||
}
|
||||
|
||||
/***
|
||||
* Returns microsecond since last clock interrupt. Note that interrupts
|
||||
* will have been disabled by do_gettimeoffset()
|
||||
* IRQs are disabled before entering here from do_gettimeofday()
|
||||
*/
|
||||
|
||||
static u32 s3c2410_gettimeoffset(void)
|
||||
{
|
||||
unsigned long tdone;
|
||||
unsigned long tval;
|
||||
|
||||
/* work out how many ticks have gone since last timer interrupt */
|
||||
|
||||
tval = __raw_readl(S3C2410_TCNTO(4));
|
||||
tdone = timer_startval - tval;
|
||||
|
||||
/* check to see if there is an interrupt pending */
|
||||
|
||||
if (s3c24xx_ostimer_pending()) {
|
||||
/* re-read the timer, and try and fix up for the missed
|
||||
* interrupt. Note, the interrupt may go off before the
|
||||
* timer has re-loaded from wrapping.
|
||||
*/
|
||||
|
||||
tval = __raw_readl(S3C2410_TCNTO(4));
|
||||
tdone = timer_startval - tval;
|
||||
|
||||
if (tval != 0)
|
||||
tdone += timer_startval;
|
||||
}
|
||||
|
||||
return timer_ticks_to_usec(tdone) * 1000;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* IRQ handler for the timer
|
||||
*/
|
||||
static irqreturn_t
|
||||
s3c2410_timer_interrupt(int irq, void *dev_id)
|
||||
{
|
||||
timer_tick();
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static struct irqaction s3c2410_timer_irq = {
|
||||
.name = "S3C2410 Timer Tick",
|
||||
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
|
||||
.handler = s3c2410_timer_interrupt,
|
||||
};
|
||||
|
||||
#define use_tclk1_12() ( \
|
||||
machine_is_bast() || \
|
||||
machine_is_vr1000() || \
|
||||
machine_is_anubis() || \
|
||||
machine_is_osiris())
|
||||
|
||||
static struct clk *tin;
|
||||
static struct clk *tdiv;
|
||||
static struct clk *timerclk;
|
||||
|
||||
/*
|
||||
* Set up timer interrupt, and return the current time in seconds.
|
||||
*
|
||||
* Currently we only use timer4, as it is the only timer which has no
|
||||
* other function that can be exploited externally
|
||||
*/
|
||||
static void s3c2410_timer_setup (void)
|
||||
{
|
||||
unsigned long tcon;
|
||||
unsigned long tcnt;
|
||||
unsigned long tcfg1;
|
||||
unsigned long tcfg0;
|
||||
|
||||
tcnt = TICK_MAX; /* default value for tcnt */
|
||||
|
||||
/* configure the system for whichever machine is in use */
|
||||
|
||||
if (use_tclk1_12()) {
|
||||
/* timer is at 12MHz, scaler is 1 */
|
||||
timer_usec_ticks = timer_mask_usec_ticks(1, 12000000);
|
||||
tcnt = 12000000 / HZ;
|
||||
|
||||
tcfg1 = __raw_readl(S3C2410_TCFG1);
|
||||
tcfg1 &= ~S3C2410_TCFG1_MUX4_MASK;
|
||||
tcfg1 |= S3C2410_TCFG1_MUX4_TCLK1;
|
||||
__raw_writel(tcfg1, S3C2410_TCFG1);
|
||||
} else {
|
||||
unsigned long pclk;
|
||||
struct clk *tscaler;
|
||||
|
||||
/* for the h1940 (and others), we use the pclk from the core
|
||||
* to generate the timer values. since values around 50 to
|
||||
* 70MHz are not values we can directly generate the timer
|
||||
* value from, we need to pre-scale and divide before using it.
|
||||
*
|
||||
* for instance, using 50.7MHz and dividing by 6 gives 8.45MHz
|
||||
* (8.45 ticks per usec)
|
||||
*/
|
||||
|
||||
pclk = clk_get_rate(timerclk);
|
||||
|
||||
/* configure clock tick */
|
||||
|
||||
timer_usec_ticks = timer_mask_usec_ticks(6, pclk);
|
||||
|
||||
tscaler = clk_get_parent(tdiv);
|
||||
|
||||
clk_set_rate(tscaler, pclk / 3);
|
||||
clk_set_rate(tdiv, pclk / 6);
|
||||
clk_set_parent(tin, tdiv);
|
||||
|
||||
tcnt = clk_get_rate(tin) / HZ;
|
||||
}
|
||||
|
||||
tcon = __raw_readl(S3C2410_TCON);
|
||||
tcfg0 = __raw_readl(S3C2410_TCFG0);
|
||||
tcfg1 = __raw_readl(S3C2410_TCFG1);
|
||||
|
||||
/* timers reload after counting zero, so reduce the count by 1 */
|
||||
|
||||
tcnt--;
|
||||
|
||||
printk(KERN_DEBUG "timer tcon=%08lx, tcnt %04lx, tcfg %08lx,%08lx, usec %08lx\n",
|
||||
tcon, tcnt, tcfg0, tcfg1, timer_usec_ticks);
|
||||
|
||||
/* check to see if timer is within 16bit range... */
|
||||
if (tcnt > TICK_MAX) {
|
||||
panic("setup_timer: HZ is too small, cannot configure timer!");
|
||||
return;
|
||||
}
|
||||
|
||||
__raw_writel(tcfg1, S3C2410_TCFG1);
|
||||
__raw_writel(tcfg0, S3C2410_TCFG0);
|
||||
|
||||
timer_startval = tcnt;
|
||||
__raw_writel(tcnt, S3C2410_TCNTB(4));
|
||||
|
||||
/* ensure timer is stopped... */
|
||||
|
||||
tcon &= ~(7<<20);
|
||||
tcon |= S3C2410_TCON_T4RELOAD;
|
||||
tcon |= S3C2410_TCON_T4MANUALUPD;
|
||||
|
||||
__raw_writel(tcon, S3C2410_TCON);
|
||||
__raw_writel(tcnt, S3C2410_TCNTB(4));
|
||||
__raw_writel(tcnt, S3C2410_TCMPB(4));
|
||||
|
||||
/* start the timer running */
|
||||
tcon |= S3C2410_TCON_T4START;
|
||||
tcon &= ~S3C2410_TCON_T4MANUALUPD;
|
||||
__raw_writel(tcon, S3C2410_TCON);
|
||||
}
|
||||
|
||||
static void __init s3c2410_timer_resources(void)
|
||||
{
|
||||
struct platform_device tmpdev;
|
||||
|
||||
tmpdev.dev.bus = &platform_bus_type;
|
||||
tmpdev.id = 4;
|
||||
|
||||
timerclk = clk_get(NULL, "timers");
|
||||
if (IS_ERR(timerclk))
|
||||
panic("failed to get clock for system timer");
|
||||
|
||||
clk_enable(timerclk);
|
||||
|
||||
if (!use_tclk1_12()) {
|
||||
tmpdev.id = 4;
|
||||
tmpdev.dev.init_name = "s3c24xx-pwm.4";
|
||||
tin = clk_get(&tmpdev.dev, "pwm-tin");
|
||||
if (IS_ERR(tin))
|
||||
panic("failed to get pwm-tin clock for system timer");
|
||||
|
||||
tdiv = clk_get(&tmpdev.dev, "pwm-tdiv");
|
||||
if (IS_ERR(tdiv))
|
||||
panic("failed to get pwm-tdiv clock for system timer");
|
||||
}
|
||||
|
||||
clk_enable(tin);
|
||||
}
|
||||
|
||||
static struct syscore_ops s3c24xx_syscore_ops = {
|
||||
.resume = s3c2410_timer_setup,
|
||||
};
|
||||
|
||||
void __init s3c24xx_timer_init(void)
|
||||
{
|
||||
arch_gettimeoffset = s3c2410_gettimeoffset;
|
||||
|
||||
s3c2410_timer_resources();
|
||||
s3c2410_timer_setup();
|
||||
setup_irq(IRQ_TIMER4, &s3c2410_timer_irq);
|
||||
register_syscore_ops(&s3c24xx_syscore_ops);
|
||||
}
|
||||
Loading…
Reference in New Issue