From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Chou <thomas@wytron.com.tw>
Date: Tue, 3 Nov 2015 14:25:53 +0800
Subject: [U-Boot] [PATCH v3 2/3] cfi_flash: convert to driver model
In-Reply-To: <56384C9C.6030709@denx.de>
References: <1444289667-23775-1-git-send-email-thomas@wytron.com.tw>
 <1446212027-20630-1-git-send-email-thomas@wytron.com.tw>
 <1446212027-20630-2-git-send-email-thomas@wytron.com.tw>
 <56371CE1.9000203@denx.de> <5637FE76.3050208@wytron.com.tw>
 <56384C9C.6030709@denx.de>
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To: u-boot@lists.denx.de

Hi Stefan,

On 2015?11?03? 13:56, Stefan Roese wrote:
>> if (CONFIG_IS_ENABLED(CFI_FLASH)) {
>>      struct udevice *dev;
>>      cfi_flash_num_flash_banks = 0;
>>      /* probe every MTD device to find cfi-flash device */
>>      for (uclass_first_device(UCLASS_MTD, &dev);
>>           dev;
>>           uclass_next_device(&dev)) {
>>      }
>> }
>
> I'm still not an expert in the DM internals. I fail to see, where
> the actual probing is happening in the loop. Is it buried in the
> uclass_first_device() call?

The probing is happening in both uclass_first_device() and 
uclass_next_device().

The uclass_first_device() will probe the first device.
While uclass_next_device() will probe the rest if they exist.

Best regards,
Thomas