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S5P: timer: Use pwm functions

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Use pwm functions for timer that is PWM timer 4.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Minkyu Kang 2011-03-10 20:05:58 +09:00 • committed by Albert Aribaud
parent 3f129280b3
commit 70fc52dfaa
3 changed files with 7 additions and 58 deletions
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49
arch/arm/cpu/armv7/s5p-common/timer.c
View file

@ -27,15 +27,7 @@
#include <asm/io.h>
#include <asm/arch/pwm.h>
#include <asm/arch/clk.h>
#define PRESCALER_1 (16 - 1) /* prescaler of timer 2, 3, 4 */
#define MUX_DIV_2 1 /* 1/2 period */
#define MUX_DIV_4 2 /* 1/4 period */
#define MUX_DIV_8 3 /* 1/8 period */
#define MUX_DIV_16 4 /* 1/16 period */
#define MUX4_DIV_SHIFT 16
#define TCON_TIMER4_SHIFT 20
#include <pwm.h>
static unsigned long count_value;
@ -51,41 +43,10 @@ static inline struct s5p_timer *s5p_get_base_timer(void)
int timer_init(void)
{
struct s5p_timer *const timer = s5p_get_base_timer();
u32 val;
/*
* @ PWM Timer 4
* Timer Freq(HZ) =
* PWM_CLK / { (prescaler_value + 1) * (divider_value) }
*/
/* set prescaler : 16 */
/* set divider : 2 */
writel((PRESCALER_1 & 0xff) << 8, &timer->tcfg0);
writel((MUX_DIV_2 & 0xf) << MUX4_DIV_SHIFT, &timer->tcfg1);
/* count_value = 2085937.5(HZ) (per 1 sec)*/
count_value = get_pwm_clk() / ((PRESCALER_1 + 1) *
(MUX_DIV_2 + 1));
/* count_value / 100 = 20859.375(HZ) (per 10 msec) */
count_value = count_value / 100;
/* set count value */
writel(count_value, &timer->tcntb4);
lastdec = count_value;
val = (readl(&timer->tcon) & ~(0x07 << TCON_TIMER4_SHIFT)) |
TCON4_AUTO_RELOAD;
/* auto reload & manual update */
writel(val | TCON4_UPDATE, &timer->tcon);
/* start PWM timer 4 */
writel(val | TCON4_START, &timer->tcon);
timestamp = 0;
/* PWM Timer 4 */
pwm_init(4, MUX_DIV_2, 0);
pwm_config(4, 0, 0);
pwm_enable(4);
return 0;
}

8
arch/arm/include/asm/arch-s5pc1xx/pwm.h
View file

@ -34,19 +34,13 @@
#define MUX_DIV_SHIFT(x) (x * 4)
/* Interval mode(Auto Reload) of PWM Timer 4 */
#define TCON4_AUTO_RELOAD (1 << 22)
/* Update TCNTB4 */
#define TCON4_UPDATE (1 << 21)
/* start bit of PWM Timer 4 */
#define TCON4_START (1 << 20)
#define TCON_OFFSET(x) ((x + 1) * (!!x) << 2)
#define TCON_START(x) (1 << TCON_OFFSET(x))
#define TCON_UPDATE(x) (1 << (TCON_OFFSET(x) + 1))
#define TCON_INVERTER(x) (1 << (TCON_OFFSET(x) + 2))
#define TCON_AUTO_RELOAD(x) (1 << (TCON_OFFSET(x) + 3))
#define TCON4_AUTO_RELOAD (1 << 22)
#ifndef __ASSEMBLY__
struct s5p_timer {

8
arch/arm/include/asm/arch-s5pc2xx/pwm.h
View file

@ -34,19 +34,13 @@
#define MUX_DIV_SHIFT(x) (x * 4)
/* Interval mode(Auto Reload) of PWM Timer 4 */
#define TCON4_AUTO_RELOAD (1 << 22)
/* Update TCNTB4 */
#define TCON4_UPDATE (1 << 21)
/* start bit of PWM Timer 4 */
#define TCON4_START (1 << 20)
#define TCON_OFFSET(x) ((x + 1) * (!!x) << 2)
#define TCON_START(x) (1 << TCON_OFFSET(x))
#define TCON_UPDATE(x) (1 << (TCON_OFFSET(x) + 1))
#define TCON_INVERTER(x) (1 << (TCON_OFFSET(x) + 2))
#define TCON_AUTO_RELOAD(x) (1 << (TCON_OFFSET(x) + 3))
#define TCON4_AUTO_RELOAD (1 << 22)
#ifndef __ASSEMBLY__
struct s5p_timer {