.

.

.

common/stdio.c

int stdio_add_devices(void)
{
#ifdef CONFIG_DM_KEYBOARD
        struct udevice *dev;
        struct uclass *uc;
        int ret;

        /*
         * For now we probe all the devices here. At some point this should be
         * done only when the devices are required - e.g. we have a list of
         * input devices to start up in the stdin environment variable. That
         * work probably makes more sense when stdio itself is converted to
         * driver model.
         *
         * TODO([email protected]): Convert changing uclass_first_device() etc.
         * to return the device even on error. Then we could use that here.
         */
        ret = uclass_get(UCLASS_KEYBOARD, &uc);
        if (ret)
                return ret;

        /* Don't report errors to the caller - assume that they are non-fatal */
        uclass_foreach_dev(dev, uc) {
                ret = device_probe(dev);
                if (ret)
                        printf("Failed to probe keyboard '%s'\n", dev->name);
        }
#endif
#ifdef CONFIG_SYS_I2C
        i2c_init_all();
#else
#if defined(CONFIG_HARD_I2C)
        i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
#endif
#ifdef CONFIG_DM_VIDEO
        /*
         * If the console setting is not in environment variables then
         * console_init_r() will not be calling iomux_doenv() (which calls
         * search_device()). So we will not dynamically add devices by
         * calling stdio_probe_device().
         *
         * So just probe all video devices now so that whichever one is
         * required will be available.
         */
#ifndef CONFIG_SYS_CONSOLE_IS_IN_ENV
        struct udevice *vdev;
# ifndef CONFIG_DM_KEYBOARD
        int ret;
# endif

        for (ret = uclass_first_device(UCLASS_VIDEO, &vdev);
             vdev;
             ret = uclass_next_device(&vdev))
                ;
        if (ret)
                printf("%s: Video device failed (ret=%d)\n", __func__, ret);
#endif /* !CONFIG_SYS_CONSOLE_IS_IN_ENV */
#else
# if defined(CONFIG_LCD)
        drv_lcd_init ();
# endif
# if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
        drv_video_init ();
# endif
#endif /* CONFIG_DM_VIDEO */
#if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
        drv_keyboard_init ();
#endif
#ifdef CONFIG_LOGBUFFER
        drv_logbuff_init ();
#endif
        drv_system_init ();
        serial_stdio_init ();
#ifdef CONFIG_USB_TTY
        drv_usbtty_init ();
#endif
#ifdef CONFIG_NETCONSOLE
        drv_nc_init ();
#endif
#ifdef CONFIG_JTAG_CONSOLE
        drv_jtag_console_init ();
#endif
#ifdef CONFIG_CBMEM_CONSOLE
        cbmemc_init();
#endif

        return 0;
}