2009-07-01 23:47:07 +08:00
|
|
|
/* arch/arm/plat-s3c/pwm.c
|
2008-07-01 20:17:24 +08:00
|
|
|
*
|
|
|
|
* Copyright (c) 2007 Ben Dooks
|
|
|
|
* Copyright (c) 2008 Simtec Electronics
|
|
|
|
* Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org>
|
|
|
|
*
|
2009-07-01 23:47:07 +08:00
|
|
|
* S3C series PWM device core
|
2008-07-01 20:17:24 +08:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/err.h>
|
|
|
|
#include <linux/clk.h>
|
|
|
|
#include <linux/io.h>
|
|
|
|
#include <linux/pwm.h>
|
|
|
|
|
[ARM] fix AT91, davinci, h720x, ks8695, msm, mx2, mx3, netx, omap1, omap2, pxa, s3c
arch/arm/mach-at91/at91cap9.c:337: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91rm9200.c:301: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9260.c:351: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9261.c:287: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9263.c:312: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9rl.c:304: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-h720x/h7202-eval.c:38: error: implicit declaration of function 'IRQ_CHAINED_GPIOB'
arch/arm/mach-ks8695/devices.c:46: error: 'KS8695_IRQ_WAN_RX_STATUS' undeclared here (not in a function)
arch/arm/mach-msm/devices.c:28: error: 'INT_UART1' undeclared here (not in a function)
arch/arm/mach-mx2/devices.c:233: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-mx3/devices.c:128: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:140: error: 'INT_730_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:165: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:200: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap2/board-apollon.c:286: error: implicit declaration of function 'omap_set_gpio_direction'
arch/arm/mach-omap2/mcbsp.c:154: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-omap2/mcbsp.c:181: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-pxa/e350.c:36: error: 'IRQ_BOARD_START' undeclared here (not in a function)
arch/arm/plat-s3c/dev-i2c0.c:32: error: 'IRQ_IIC' undeclared here (not in a function)
...
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-08 18:01:47 +08:00
|
|
|
#include <mach/irqs.h>
|
2009-07-01 23:47:07 +08:00
|
|
|
#include <mach/map.h>
|
[ARM] fix AT91, davinci, h720x, ks8695, msm, mx2, mx3, netx, omap1, omap2, pxa, s3c
arch/arm/mach-at91/at91cap9.c:337: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91rm9200.c:301: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9260.c:351: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9261.c:287: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9263.c:312: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9rl.c:304: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-h720x/h7202-eval.c:38: error: implicit declaration of function 'IRQ_CHAINED_GPIOB'
arch/arm/mach-ks8695/devices.c:46: error: 'KS8695_IRQ_WAN_RX_STATUS' undeclared here (not in a function)
arch/arm/mach-msm/devices.c:28: error: 'INT_UART1' undeclared here (not in a function)
arch/arm/mach-mx2/devices.c:233: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-mx3/devices.c:128: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:140: error: 'INT_730_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:165: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:200: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap2/board-apollon.c:286: error: implicit declaration of function 'omap_set_gpio_direction'
arch/arm/mach-omap2/mcbsp.c:154: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-omap2/mcbsp.c:181: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-pxa/e350.c:36: error: 'IRQ_BOARD_START' undeclared here (not in a function)
arch/arm/plat-s3c/dev-i2c0.c:32: error: 'IRQ_IIC' undeclared here (not in a function)
...
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-01-08 18:01:47 +08:00
|
|
|
|
2008-10-08 05:26:09 +08:00
|
|
|
#include <plat/devs.h>
|
|
|
|
#include <plat/regs-timer.h>
|
2008-07-01 20:17:24 +08:00
|
|
|
|
|
|
|
struct pwm_device {
|
|
|
|
struct list_head list;
|
|
|
|
struct platform_device *pdev;
|
|
|
|
|
|
|
|
struct clk *clk_div;
|
|
|
|
struct clk *clk;
|
|
|
|
const char *label;
|
|
|
|
|
|
|
|
unsigned int period_ns;
|
|
|
|
unsigned int duty_ns;
|
|
|
|
|
|
|
|
unsigned char tcon_base;
|
|
|
|
unsigned char running;
|
|
|
|
unsigned char use_count;
|
|
|
|
unsigned char pwm_id;
|
|
|
|
};
|
|
|
|
|
2008-08-27 05:54:06 +08:00
|
|
|
#define pwm_dbg(_pwm, msg...) dev_dbg(&(_pwm)->pdev->dev, msg)
|
2008-07-01 20:17:24 +08:00
|
|
|
|
|
|
|
static struct clk *clk_scaler[2];
|
|
|
|
|
|
|
|
/* Standard setup for a timer block. */
|
|
|
|
|
|
|
|
#define TIMER_RESOURCE_SIZE (1)
|
|
|
|
|
|
|
|
#define TIMER_RESOURCE(_tmr, _irq) \
|
|
|
|
(struct resource [TIMER_RESOURCE_SIZE]) { \
|
|
|
|
[0] = { \
|
|
|
|
.start = _irq, \
|
|
|
|
.end = _irq, \
|
|
|
|
.flags = IORESOURCE_IRQ \
|
|
|
|
} \
|
|
|
|
}
|
|
|
|
|
2008-10-16 23:46:10 +08:00
|
|
|
#define DEFINE_S3C_TIMER(_tmr_no, _irq) \
|
2008-07-01 20:17:24 +08:00
|
|
|
.name = "s3c24xx-pwm", \
|
|
|
|
.id = _tmr_no, \
|
|
|
|
.num_resources = TIMER_RESOURCE_SIZE, \
|
|
|
|
.resource = TIMER_RESOURCE(_tmr_no, _irq), \
|
|
|
|
|
|
|
|
/* since we already have an static mapping for the timer, we do not
|
|
|
|
* bother setting any IO resource for the base.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct platform_device s3c_device_timer[] = {
|
2008-10-16 23:46:10 +08:00
|
|
|
[0] = { DEFINE_S3C_TIMER(0, IRQ_TIMER0) },
|
|
|
|
[1] = { DEFINE_S3C_TIMER(1, IRQ_TIMER1) },
|
|
|
|
[2] = { DEFINE_S3C_TIMER(2, IRQ_TIMER2) },
|
|
|
|
[3] = { DEFINE_S3C_TIMER(3, IRQ_TIMER3) },
|
|
|
|
[4] = { DEFINE_S3C_TIMER(4, IRQ_TIMER4) },
|
2008-07-01 20:17:24 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static inline int pwm_is_tdiv(struct pwm_device *pwm)
|
|
|
|
{
|
|
|
|
return clk_get_parent(pwm->clk) == pwm->clk_div;
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEFINE_MUTEX(pwm_lock);
|
|
|
|
static LIST_HEAD(pwm_list);
|
|
|
|
|
|
|
|
struct pwm_device *pwm_request(int pwm_id, const char *label)
|
|
|
|
{
|
|
|
|
struct pwm_device *pwm;
|
|
|
|
int found = 0;
|
|
|
|
|
|
|
|
mutex_lock(&pwm_lock);
|
|
|
|
|
|
|
|
list_for_each_entry(pwm, &pwm_list, list) {
|
|
|
|
if (pwm->pwm_id == pwm_id) {
|
|
|
|
found = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (found) {
|
|
|
|
if (pwm->use_count == 0) {
|
|
|
|
pwm->use_count = 1;
|
|
|
|
pwm->label = label;
|
|
|
|
} else
|
|
|
|
pwm = ERR_PTR(-EBUSY);
|
|
|
|
} else
|
|
|
|
pwm = ERR_PTR(-ENOENT);
|
|
|
|
|
|
|
|
mutex_unlock(&pwm_lock);
|
|
|
|
return pwm;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(pwm_request);
|
|
|
|
|
|
|
|
|
|
|
|
void pwm_free(struct pwm_device *pwm)
|
|
|
|
{
|
|
|
|
mutex_lock(&pwm_lock);
|
|
|
|
|
|
|
|
if (pwm->use_count) {
|
|
|
|
pwm->use_count--;
|
|
|
|
pwm->label = NULL;
|
|
|
|
} else
|
|
|
|
printk(KERN_ERR "PWM%d device already freed\n", pwm->pwm_id);
|
|
|
|
|
|
|
|
mutex_unlock(&pwm_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(pwm_free);
|
|
|
|
|
|
|
|
#define pwm_tcon_start(pwm) (1 << (pwm->tcon_base + 0))
|
|
|
|
#define pwm_tcon_invert(pwm) (1 << (pwm->tcon_base + 2))
|
|
|
|
#define pwm_tcon_autoreload(pwm) (1 << (pwm->tcon_base + 3))
|
|
|
|
#define pwm_tcon_manulupdate(pwm) (1 << (pwm->tcon_base + 1))
|
|
|
|
|
|
|
|
int pwm_enable(struct pwm_device *pwm)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
unsigned long tcon;
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
|
|
tcon = __raw_readl(S3C2410_TCON);
|
|
|
|
tcon |= pwm_tcon_start(pwm);
|
|
|
|
__raw_writel(tcon, S3C2410_TCON);
|
|
|
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
|
|
|
pwm->running = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(pwm_enable);
|
|
|
|
|
|
|
|
void pwm_disable(struct pwm_device *pwm)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
unsigned long tcon;
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
|
|
tcon = __raw_readl(S3C2410_TCON);
|
|
|
|
tcon &= ~pwm_tcon_start(pwm);
|
|
|
|
__raw_writel(tcon, S3C2410_TCON);
|
|
|
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
|
|
|
pwm->running = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(pwm_disable);
|
|
|
|
|
2008-08-27 05:54:05 +08:00
|
|
|
static unsigned long pwm_calc_tin(struct pwm_device *pwm, unsigned long freq)
|
2008-07-01 20:17:24 +08:00
|
|
|
{
|
|
|
|
unsigned long tin_parent_rate;
|
|
|
|
unsigned int div;
|
|
|
|
|
|
|
|
tin_parent_rate = clk_get_rate(clk_get_parent(pwm->clk_div));
|
|
|
|
pwm_dbg(pwm, "tin parent at %lu\n", tin_parent_rate);
|
|
|
|
|
|
|
|
for (div = 2; div <= 16; div *= 2) {
|
|
|
|
if ((tin_parent_rate / (div << 16)) < freq)
|
|
|
|
return tin_parent_rate / div;
|
|
|
|
}
|
|
|
|
|
|
|
|
return tin_parent_rate / 16;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define NS_IN_HZ (1000000000UL)
|
|
|
|
|
|
|
|
int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
|
|
|
|
{
|
|
|
|
unsigned long tin_rate;
|
|
|
|
unsigned long tin_ns;
|
|
|
|
unsigned long period;
|
|
|
|
unsigned long flags;
|
|
|
|
unsigned long tcon;
|
|
|
|
unsigned long tcnt;
|
|
|
|
long tcmp;
|
|
|
|
|
|
|
|
/* We currently avoid using 64bit arithmetic by using the
|
|
|
|
* fact that anything faster than 1Hz is easily representable
|
|
|
|
* by 32bits. */
|
|
|
|
|
|
|
|
if (period_ns > NS_IN_HZ || duty_ns > NS_IN_HZ)
|
|
|
|
return -ERANGE;
|
|
|
|
|
|
|
|
if (duty_ns > period_ns)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (period_ns == pwm->period_ns &&
|
|
|
|
duty_ns == pwm->duty_ns)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* The TCMP and TCNT can be read without a lock, they're not
|
|
|
|
* shared between the timers. */
|
|
|
|
|
|
|
|
tcmp = __raw_readl(S3C2410_TCMPB(pwm->pwm_id));
|
|
|
|
tcnt = __raw_readl(S3C2410_TCNTB(pwm->pwm_id));
|
|
|
|
|
|
|
|
period = NS_IN_HZ / period_ns;
|
|
|
|
|
|
|
|
pwm_dbg(pwm, "duty_ns=%d, period_ns=%d (%lu)\n",
|
|
|
|
duty_ns, period_ns, period);
|
|
|
|
|
|
|
|
/* Check to see if we are changing the clock rate of the PWM */
|
|
|
|
|
|
|
|
if (pwm->period_ns != period_ns) {
|
|
|
|
if (pwm_is_tdiv(pwm)) {
|
|
|
|
tin_rate = pwm_calc_tin(pwm, period);
|
|
|
|
clk_set_rate(pwm->clk_div, tin_rate);
|
|
|
|
} else
|
|
|
|
tin_rate = clk_get_rate(pwm->clk);
|
|
|
|
|
|
|
|
pwm->period_ns = period_ns;
|
|
|
|
|
|
|
|
pwm_dbg(pwm, "tin_rate=%lu\n", tin_rate);
|
|
|
|
|
|
|
|
tin_ns = NS_IN_HZ / tin_rate;
|
|
|
|
tcnt = period_ns / tin_ns;
|
|
|
|
} else
|
|
|
|
tin_ns = NS_IN_HZ / clk_get_rate(pwm->clk);
|
|
|
|
|
|
|
|
/* Note, counters count down */
|
|
|
|
|
|
|
|
tcmp = duty_ns / tin_ns;
|
|
|
|
tcmp = tcnt - tcmp;
|
2009-07-01 23:47:08 +08:00
|
|
|
/* the pwm hw only checks the compare register after a decrement,
|
|
|
|
so the pin never toggles if tcmp = tcnt */
|
|
|
|
if (tcmp == tcnt)
|
|
|
|
tcmp--;
|
2008-07-01 20:17:24 +08:00
|
|
|
|
|
|
|
pwm_dbg(pwm, "tin_ns=%lu, tcmp=%ld/%lu\n", tin_ns, tcmp, tcnt);
|
|
|
|
|
|
|
|
if (tcmp < 0)
|
|
|
|
tcmp = 0;
|
|
|
|
|
|
|
|
/* Update the PWM register block. */
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
|
|
__raw_writel(tcmp, S3C2410_TCMPB(pwm->pwm_id));
|
|
|
|
__raw_writel(tcnt, S3C2410_TCNTB(pwm->pwm_id));
|
|
|
|
|
|
|
|
tcon = __raw_readl(S3C2410_TCON);
|
|
|
|
tcon |= pwm_tcon_manulupdate(pwm);
|
|
|
|
tcon |= pwm_tcon_autoreload(pwm);
|
|
|
|
__raw_writel(tcon, S3C2410_TCON);
|
|
|
|
|
|
|
|
tcon &= ~pwm_tcon_manulupdate(pwm);
|
|
|
|
__raw_writel(tcon, S3C2410_TCON);
|
|
|
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(pwm_config);
|
|
|
|
|
|
|
|
static int pwm_register(struct pwm_device *pwm)
|
|
|
|
{
|
|
|
|
pwm->duty_ns = -1;
|
|
|
|
pwm->period_ns = -1;
|
|
|
|
|
|
|
|
mutex_lock(&pwm_lock);
|
|
|
|
list_add_tail(&pwm->list, &pwm_list);
|
|
|
|
mutex_unlock(&pwm_lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int s3c_pwm_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
struct pwm_device *pwm;
|
|
|
|
unsigned long flags;
|
|
|
|
unsigned long tcon;
|
|
|
|
unsigned int id = pdev->id;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (id == 4) {
|
|
|
|
dev_err(dev, "TIMER4 is currently not supported\n");
|
|
|
|
return -ENXIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
pwm = kzalloc(sizeof(struct pwm_device), GFP_KERNEL);
|
|
|
|
if (pwm == NULL) {
|
|
|
|
dev_err(dev, "failed to allocate pwm_device\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
pwm->pdev = pdev;
|
|
|
|
pwm->pwm_id = id;
|
|
|
|
|
|
|
|
/* calculate base of control bits in TCON */
|
|
|
|
pwm->tcon_base = id == 0 ? 0 : (id * 4) + 4;
|
|
|
|
|
|
|
|
pwm->clk = clk_get(dev, "pwm-tin");
|
|
|
|
if (IS_ERR(pwm->clk)) {
|
|
|
|
dev_err(dev, "failed to get pwm tin clk\n");
|
|
|
|
ret = PTR_ERR(pwm->clk);
|
|
|
|
goto err_alloc;
|
|
|
|
}
|
|
|
|
|
|
|
|
pwm->clk_div = clk_get(dev, "pwm-tdiv");
|
|
|
|
if (IS_ERR(pwm->clk_div)) {
|
|
|
|
dev_err(dev, "failed to get pwm tdiv clk\n");
|
|
|
|
ret = PTR_ERR(pwm->clk_div);
|
|
|
|
goto err_clk_tin;
|
|
|
|
}
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
|
|
tcon = __raw_readl(S3C2410_TCON);
|
|
|
|
tcon |= pwm_tcon_invert(pwm);
|
|
|
|
__raw_writel(tcon, S3C2410_TCON);
|
|
|
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
|
|
|
|
|
|
|
ret = pwm_register(pwm);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(dev, "failed to register pwm\n");
|
|
|
|
goto err_clk_tdiv;
|
|
|
|
}
|
|
|
|
|
|
|
|
pwm_dbg(pwm, "config bits %02x\n",
|
|
|
|
(__raw_readl(S3C2410_TCON) >> pwm->tcon_base) & 0x0f);
|
|
|
|
|
|
|
|
dev_info(dev, "tin at %lu, tdiv at %lu, tin=%sclk, base %d\n",
|
|
|
|
clk_get_rate(pwm->clk),
|
|
|
|
clk_get_rate(pwm->clk_div),
|
|
|
|
pwm_is_tdiv(pwm) ? "div" : "ext", pwm->tcon_base);
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, pwm);
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_clk_tdiv:
|
|
|
|
clk_put(pwm->clk_div);
|
|
|
|
|
|
|
|
err_clk_tin:
|
|
|
|
clk_put(pwm->clk);
|
|
|
|
|
|
|
|
err_alloc:
|
|
|
|
kfree(pwm);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-11-25 05:07:11 +08:00
|
|
|
static int __devexit s3c_pwm_remove(struct platform_device *pdev)
|
2008-07-01 20:17:24 +08:00
|
|
|
{
|
|
|
|
struct pwm_device *pwm = platform_get_drvdata(pdev);
|
|
|
|
|
|
|
|
clk_put(pwm->clk_div);
|
|
|
|
clk_put(pwm->clk);
|
|
|
|
kfree(pwm);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-03-15 22:27:08 +08:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int s3c_pwm_suspend(struct platform_device *pdev, pm_message_t state)
|
|
|
|
{
|
|
|
|
struct pwm_device *pwm = platform_get_drvdata(pdev);
|
|
|
|
|
|
|
|
/* No one preserve these values during suspend so reset them
|
|
|
|
* Otherwise driver leaves PWM unconfigured if same values
|
|
|
|
* passed to pwm_config
|
|
|
|
*/
|
|
|
|
pwm->period_ns = 0;
|
|
|
|
pwm->duty_ns = 0;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int s3c_pwm_resume(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct pwm_device *pwm = platform_get_drvdata(pdev);
|
|
|
|
unsigned long tcon;
|
|
|
|
|
|
|
|
/* Restore invertion */
|
|
|
|
tcon = __raw_readl(S3C2410_TCON);
|
|
|
|
tcon |= pwm_tcon_invert(pwm);
|
|
|
|
__raw_writel(tcon, S3C2410_TCON);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
#define s3c_pwm_suspend NULL
|
|
|
|
#define s3c_pwm_resume NULL
|
|
|
|
#endif
|
|
|
|
|
2008-07-01 20:17:24 +08:00
|
|
|
static struct platform_driver s3c_pwm_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "s3c24xx-pwm",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
},
|
|
|
|
.probe = s3c_pwm_probe,
|
|
|
|
.remove = __devexit_p(s3c_pwm_remove),
|
2010-03-15 22:27:08 +08:00
|
|
|
.suspend = s3c_pwm_suspend,
|
|
|
|
.resume = s3c_pwm_resume,
|
2008-07-01 20:17:24 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static int __init pwm_init(void)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
clk_scaler[0] = clk_get(NULL, "pwm-scaler0");
|
|
|
|
clk_scaler[1] = clk_get(NULL, "pwm-scaler1");
|
|
|
|
|
|
|
|
if (IS_ERR(clk_scaler[0]) || IS_ERR(clk_scaler[1])) {
|
|
|
|
printk(KERN_ERR "%s: failed to get scaler clocks\n", __func__);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = platform_driver_register(&s3c_pwm_driver);
|
|
|
|
if (ret)
|
|
|
|
printk(KERN_ERR "%s: failed to add pwm driver\n", __func__);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
arch_initcall(pwm_init);
|