struct i2c_client_t * i2c_client_alloc(const char * i2cbus, int addr, int flags)
{
struct i2c_client_t * client;
struct i2c_t * i2c;
i2c = search_bus_i2c(i2cbus);
if(!i2c)
return NULL;
if(flags & I2C_M_TEN)
{
/* 10-bit address, all values are valid */
if(addr > 0x3ff)
return NULL;
}
else
{
/*
* 7-bit address, reject the general call address
*
* Reserved addresses per I2C specification:
* 0x00 General call address / START byte
* 0x01 CBUS address
* 0x02 Reserved for different bus format
* 0x03 Reserved for future purposes
* 0x04-0x07 Hs-mode master code
* 0x78-0x7b 10-bit slave addressing
* 0x7c-0x7f Reserved for future purposes
*/
if(addr < 0x08 || addr > 0x77)
return NULL;
}
client = malloc(sizeof(struct i2c_client_t));
if(!client)
return NULL;
client->i2c = i2c;
client->addr = addr;
client->flags = flags;
return client;
}
static bool_t realview_unregister_i2c_bus(struct resource_t * res)
{
struct i2c_t * i2c;
char name[64];
snprintf(name, sizeof(name), "%s.%d", res->name, res->id);
i2c = search_bus_i2c(name);
if(!i2c)
return FALSE;
if(!unregister_bus_i2c(i2c))
return FALSE;
free(i2c->priv);
free(i2c->name);
free(i2c);
return TRUE;
}