mpc52xx_gpt.c File Reference

#include <linux/device.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/watchdog.h>
#include <linux/miscdevice.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <asm/div64.h>
#include <asm/mpc52xx.h>

Go to the source code of this file.

Data Structures
struct	mpc52xx_gpt_priv

Macros
#define	MPC52xx_GPT_MODE_MS_MASK   (0x07)
#define	MPC52xx_GPT_MODE_MS_IC   (0x01)
#define	MPC52xx_GPT_MODE_MS_OC   (0x02)
#define	MPC52xx_GPT_MODE_MS_PWM   (0x03)
#define	MPC52xx_GPT_MODE_MS_GPIO   (0x04)
#define	MPC52xx_GPT_MODE_GPIO_MASK   (0x30)
#define	MPC52xx_GPT_MODE_GPIO_OUT_LOW   (0x20)
#define	MPC52xx_GPT_MODE_GPIO_OUT_HIGH   (0x30)
#define	MPC52xx_GPT_MODE_COUNTER_ENABLE   (0x1000)
#define	MPC52xx_GPT_MODE_CONTINUOUS   (0x0400)
#define	MPC52xx_GPT_MODE_OPEN_DRAIN   (0x0200)
#define	MPC52xx_GPT_MODE_IRQ_EN   (0x0100)
#define	MPC52xx_GPT_MODE_WDT_EN   (0x8000)
#define	MPC52xx_GPT_MODE_ICT_MASK   (0x030000)
#define	MPC52xx_GPT_MODE_ICT_RISING   (0x010000)
#define	MPC52xx_GPT_MODE_ICT_FALLING   (0x020000)
#define	MPC52xx_GPT_MODE_ICT_TOGGLE   (0x030000)
#define	MPC52xx_GPT_MODE_WDT_PING   (0xa5)
#define	MPC52xx_GPT_STATUS_IRQMASK   (0x000f)
#define	MPC52xx_GPT_CAN_WDT   (1 << 0)
#define	MPC52xx_GPT_IS_WDT   (1 << 1)

Functions
	MODULE_DESCRIPTION ("Freescale MPC52xx gpt driver")
	MODULE_AUTHOR ("Sascha Hauer, Grant Likely, Albrecht Dreß")
	MODULE_LICENSE ("GPL")
	LIST_HEAD (mpc52xx_gpt_list)
	DEFINE_MUTEX (mpc52xx_gpt_list_mutex)
void	mpc52xx_gpt_irq_cascade (unsigned int virq, struct irq_desc *desc)
struct mpc52xx_gpt_priv *	mpc52xx_gpt_from_irq (int irq)
	EXPORT_SYMBOL (mpc52xx_gpt_from_irq)
int	mpc52xx_gpt_start_timer (struct mpc52xx_gpt_priv *gpt, u64 period, int continuous)
	EXPORT_SYMBOL (mpc52xx_gpt_start_timer)
int	mpc52xx_gpt_stop_timer (struct mpc52xx_gpt_priv *gpt)
	EXPORT_SYMBOL (mpc52xx_gpt_stop_timer)
u64	mpc52xx_gpt_timer_period (struct mpc52xx_gpt_priv *gpt)
	EXPORT_SYMBOL (mpc52xx_gpt_timer_period)
	subsys_initcall (mpc52xx_gpt_init)
	device_initcall (mpc52xx_gpt_wdt_init)

Macro Definition Documentation

#define MPC52xx_GPT_CAN_WDT   (1 << 0)

Definition at line 131 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_IS_WDT   (1 << 1)

Definition at line 132 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_CONTINUOUS   (0x0400)

Definition at line 117 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_COUNTER_ENABLE   (0x1000)

Definition at line 116 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_GPIO_MASK   (0x30)

Definition at line 112 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_GPIO_OUT_HIGH   (0x30)

Definition at line 114 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_GPIO_OUT_LOW   (0x20)

Definition at line 113 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_ICT_FALLING   (0x020000)

Definition at line 124 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_ICT_MASK   (0x030000)

Definition at line 122 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_ICT_RISING   (0x010000)

Definition at line 123 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_ICT_TOGGLE   (0x030000)

Definition at line 125 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_IRQ_EN   (0x0100)

Definition at line 119 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_MS_GPIO   (0x04)

Definition at line 110 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_MS_IC   (0x01)

Definition at line 107 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_MS_MASK   (0x07)

Definition at line 106 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_MS_OC   (0x02)

Definition at line 108 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_MS_PWM   (0x03)

Definition at line 109 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_OPEN_DRAIN   (0x0200)

Definition at line 118 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_WDT_EN   (0x8000)

Definition at line 120 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_MODE_WDT_PING   (0xa5)

Definition at line 127 of file mpc52xx_gpt.c.

#define MPC52xx_GPT_STATUS_IRQMASK   (0x000f)

Definition at line 129 of file mpc52xx_gpt.c.

Function Documentation

DEFINE_MUTEX

(

mpc52xx_gpt_list_mutex

)

device_initcall

(

mpc52xx_gpt_wdt_init

)

EXPORT_SYMBOL

(

mpc52xx_gpt_from_irq

)

EXPORT_SYMBOL

(

mpc52xx_gpt_start_timer

)

EXPORT_SYMBOL

(

mpc52xx_gpt_stop_timer

)

EXPORT_SYMBOL

(

mpc52xx_gpt_timer_period

)

LIST_HEAD

(

mpc52xx_gpt_list

)

MODULE_AUTHOR	(	"Sascha	Hauer,
		Grant	Likely,
		Albrecht Dreß"
	)

MODULE_DESCRIPTION

(

"Freescale MPC52xx gpt driver"

)

MODULE_LICENSE

(

"GPL"

)

struct mpc52xx_gpt_priv* mpc52xx_gpt_from_irq ( int  irq )

read

mpc52xx_gpt_from_irq - Return the GPT device associated with an IRQ number : irq of timer.

Definition at line 376 of file mpc52xx_gpt.c.

void mpc52xx_gpt_irq_cascade	(	unsigned int	virq,
		struct irq_desc *	desc
	)

Definition at line 194 of file mpc52xx_gpt.c.

int mpc52xx_gpt_start_timer	(	struct mpc52xx_gpt_priv *	gpt,
		u64	period,
		int	continuous
	)

mpc52xx_gpt_start_timer - Set and enable the GPT timer : Pointer to gpt private data structure : period of timer in ns; max. ~130s @ 33MHz IPB clock : set to 1 to make timer continuous free running

An interrupt will be generated every time the timer fires

Definition at line 466 of file mpc52xx_gpt.c.

int mpc52xx_gpt_stop_timer

(

struct mpc52xx_gpt_priv *

gpt

)

mpc52xx_gpt_stop_timer - Stop a gpt : Pointer to gpt private data structure

Returns an error if attempting to stop a wdt

Definition at line 479 of file mpc52xx_gpt.c.

u64 mpc52xx_gpt_timer_period

(

struct mpc52xx_gpt_priv *

gpt

)

mpc52xx_gpt_timer_period - Read the timer period : Pointer to gpt private data structure

Returns the timer period in ns

Definition at line 502 of file mpc52xx_gpt.c.

subsys_initcall

(

mpc52xx_gpt_init

)