int i2c_set_bus_speed(unsigned int speed)
{
struct i2c_bus *i2c_bus;
i2c_bus = &i2c_controllers[i2c_bus_num];
i2c_bus->speed = speed;
i2c_init_controller(i2c_bus);
return 0;
}
/*
* Process a list of nodes, adding them to our list of I2C ports.
*
* @param blob fdt blob
* @param node_list list of nodes to process (any <=0 are ignored)
* @param count number of nodes to process
* @param is_dvc 1 if these are DVC ports, 0 if standard I2C
* @return 0 if ok, -1 on error
*/
static int process_nodes(const void *blob, int node_list[], int count,
int is_dvc)
{
struct i2c_bus *i2c_bus;
int i;
/* build the i2c_controllers[] for each controller */
for (i = 0; i < count; i++) {
int node = node_list[i];
if (node <= 0)
continue;
i2c_bus = &i2c_controllers[i];
i2c_bus->id = i;
if (i2c_get_config(blob, node, i2c_bus)) {
printf("i2c_init_board: failed to decode bus %d\n", i);
return -1;
}
i2c_bus->is_dvc = is_dvc;
if (is_dvc) {
i2c_bus->control =
&((struct dvc_ctlr *)i2c_bus->regs)->control;
} else {
i2c_bus->control = &i2c_bus->regs->control;
}
debug("%s: controller bus %d at %p, periph_id %d, speed %d: ",
is_dvc ? "dvc" : "i2c", i, i2c_bus->regs,
i2c_bus->periph_id, i2c_bus->speed);
i2c_init_controller(i2c_bus);
debug("ok\n");
i2c_bus->inited = 1;
/* Mark position as used */
node_list[i] = -1;
}
return 0;
}
void i2c_init_board(void)
{
struct i2c_bus *i2c_bus;
int i;
enum periph_id i2c_periph_ids[CONFIG_SYS_MAX_I2C_BUS] = {
PERIPH_ID_DVC_I2C,
PERIPH_ID_I2C1,
PERIPH_ID_I2C2,
PERIPH_ID_I2C3,
#if defined(CONFIG_TEGRA3)
PERIPH_ID_I2C4,
#endif
};
u32 *i2c_bus_base[CONFIG_SYS_MAX_I2C_BUS] = {
#if defined(CONFIG_TEGRA2)
(u32 *)NV_PA_DVC_BASE,
(u32 *)NV_PA_I2C1_BASE,
(u32 *)NV_PA_I2C2_BASE,
(u32 *)NV_PA_I2C3_BASE,
#endif
#if defined(CONFIG_TEGRA3)
(u32 *)NV_PA_I2C5_BASE,
(u32 *)NV_PA_I2C1_BASE,
(u32 *)NV_PA_I2C2_BASE,
(u32 *)NV_PA_I2C3_BASE,
(u32 *)NV_PA_I2C4_BASE,
#endif
};
#if defined(CONFIG_TEGRA2)
/* pinmux_configs based on the pinmux configuration */
int pinmux_configs[CONFIG_SYS_MAX_I2C_BUS] = {
CONFIG_I2CP_PIN_MUX, /* for I2CP (DVC I2C) */
CONFIG_I2C1_PIN_MUX, /* for I2C1 */
CONFIG_I2C2_PIN_MUX, /* for I2C2 */
CONFIG_I2C3_PIN_MUX /* for I2C3 */
};
#endif
/* build the i2c_controllers[] for each controller */
for (i = 0; i < CONFIG_SYS_MAX_I2C_BUS; ++i) {
i2c_bus = &i2c_controllers[i];
i2c_bus->id = i;
i2c_bus->periph_id = i2c_periph_ids[i];
i2c_bus->regs = (struct i2c_ctlr *)i2c_bus_base[i];
#if defined(CONFIG_TEGRA2)
i2c_bus->pinmux_config = pinmux_configs[i];
if (i2c_bus->periph_id == PERIPH_ID_DVC_I2C) {
i2c_bus->control =
&((struct dvc_ctlr *)i2c_bus->regs)->control;
i2c_bus->use_dvc_ctlr = 1;
} else
#endif
i2c_bus->control = &i2c_bus->regs->control;
i2c_init_controller(i2c_bus, I2CSPEED_KHZ);
}
}
