Linux platform device Application---beep

Tag: time operation Gpio device sources linu void timer __IOMEM

One beep platform-driven authoring

Gpio Resources:
Gpdcon, r/w, Address = 0xe030_0080

Timer resources: TIMER1

#define S5PC100_PA_GPIO 0xe0300080
#define S5pc100_pa_timer 0xea000000
#define S5PC100_PA_TIMER1 0xea000018
#define SZ_4 0x00000004

struct Resource S5pc100_beep_resource = {
[0] = {
. Start = S5pc100_pa_gpio,
. end = S5pc100_pa_gpio + Sz_4-1,
. Flags = Ioresource_mem,
},

[1] = {
. Start = S5pc100_pa_timer,
. end = S5pc100_pa_timer + Sz_4*3-1,
. Flags = Ioresource_mem,
},

[2] = {
. Start = S5pc100_pa_timer1,
. end = S5pc100_pa_timer1 + Sz_4*3-1,
. Flags = Ioresource_mem,
},

}

struct Platform_device = {
. Name = "S5pc100-beep",
. id =-1,
. resource = S5pc100_beep_resource,
. num_resources = Array_size (S5pc100_beep_resource),
. Dev = {
. Release = S5pc100beep_release,
},
};

----------------------------------------------------------------------------------

Enum Reg_type = {
GPIO,
TIMER,
TIMER1,
};

struct Beep_device
{
dev_t Dev_num;
void * __iomem reg[3];
struct Cdev Cdev;
struct class *cls;
struct device *device;
struct resource *res[3];
};

for (i = 0;i < 3;i + +)
Pbeep->reg[i] = Ioremap;

#define TCFG0 0
#define TCFG1 4
#define TCON 8

#define TCNTB 0
#define TCMPB 4

For example: I want to operate the Tcon register

Pbeep->reg[timer] + TCON

Idea: To find the base address and then add the offset, you can find the corresponding register
I want to operate the TCMPB register
Pbeep->reg[timer1] + TCMPB

Linux platform device Application---beep