}
#endif
-static void usb251xb_reset(struct usb251xb *hub, int state)
+static void usb251xb_reset(struct usb251xb *hub)
{
if (!hub->gpio_reset)
return;
i2c_lock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT);
- gpiod_set_value_cansleep(hub->gpio_reset, state);
+ gpiod_set_value_cansleep(hub->gpio_reset, 1);
+ usleep_range(1, 10); /* >=1us RESET_N asserted */
+ gpiod_set_value_cansleep(hub->gpio_reset, 0);
/* wait for hub recovery/stabilization */
- if (!state)
- usleep_range(500, 750); /* >=500us at power on */
- else
- usleep_range(1, 10); /* >=1us at power down */
+ usleep_range(500, 750); /* >=500us after RESET_N deasserted */
i2c_unlock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT);
}
i2c_wb[0] = 0x01;
i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH;
- usb251xb_reset(hub, 0);
+ usb251xb_reset(hub);
err = i2c_smbus_write_i2c_block_data(hub->i2c,
USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb);
i2c_wb[USB251XB_ADDR_PORT_MAP_7] = hub->port_map7;
i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH;
- usb251xb_reset(hub, 0);
+ usb251xb_reset(hub);
/* write registers */
for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {