s3c_set_platdata():platform_device->device->platform_data结构体

void __init *s3c_set_platdata(void *pd, size_t pdsize,
     struct platform_device *pdev)
{
void *npd;

if (!pd) {
/* too early to use dev_name(), may not be registered */
printk(KERN_ERR "%s: no platform data supplied\n", pdev->name);
return NULL;
}


npd = kmemdup(pd, pdsize, GFP_KERNEL);
if (!npd) {
printk(KERN_ERR "%s: cannot clone platform data\n", pdev->name);
return NULL;
}

pdev->dev.platform_data = npd;
return npd;
}

static struct resource s3c_i2c0_resource[] = {
[0] = DEFINE_RES_MEM(S3C_PA_IIC, SZ_4K),
[1] = DEFINE_RES_IRQ(IRQ_IIC),
};

struct platform_device s3c_device_i2c0 = {
.name = "s3c2410-i2c",
#ifdef CONFIG_S3C_DEV_I2C1
.id = 0,
#else
.id = -1,
#endif
.num_resources = ARRAY_SIZE(s3c_i2c0_resource),
.resource = s3c_i2c0_resource,
};


struct s3c2410_platform_i2c default_i2c_data __initdata = {
.flags = 0,
.slave_addr = 0x10,
.frequency = 100*1000,
.sda_delay = 100,
};


void __init s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *pd)
{
struct s3c2410_platform_i2c *npd;


if (!pd) {
pd = &default_i2c_data;
pd->bus_num = 0;
}


npd = s3c_set_platdata(pd, sizeof(struct s3c2410_platform_i2c),
      &s3c_device_i2c0);


if (!npd->cfg_gpio)
npd->cfg_gpio = s3c_i2c0_cfg_gpio;
}