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From: Michael Graichen <michael.graichen@hotmail.com>
To: Lucas Stach <l.stach@pengutronix.de>,
	barebox <barebox@lists.infradead.org>
Subject: AW: [PATCH 1/1] zedboard: add support for usb
Date: Tue, 18 May 2021 08:05:29 +0000	[thread overview]
Message-ID: <AM9P192MB0870DF9401D3DE0A1610CCFAAB2C9@AM9P192MB0870.EURP192.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <5232b30053c40731238b1c67028810b716cc6e49.camel@pengutronix.de>

Hey Lucas, 

[...]
> This change does 3 distinct things and should be split in 3 patches to
> do one thing at a time:
> - add Zynq EHCI support
> - add ULPI PHY ID
> - add Zedboard USB pinmux

no problem, I can split this is separate patches.

[...]
> Maybe update the defconfig too, if it doesn't blow up the image size
> too much?

This is the harder part. It actually needs support of CONFIG_USB_ULPI and CONFIG_USB_EHCI 

+config USB_EHCI_ZYNQ
+	bool "Support for Xilinx Zynq on-chip EHCI USB controller"
+	depends on ARCH_ZYNQ
+	select USB_EHCI
+	select USB_ULPI
+	help
+	  Enable support for Zynq on-chip EHCI USB controller
+

and that will blow up the image size, because ethernet is selected in zynq_defconfig right now.  
If you want to do somethink usefull, like CONFIG_USB_STORAGE, with it its even worse.

That's why I came up with the two stage boot process from the other patch. 

[...]
> pdata isn't used anywhere AFAICS, maybe drop it and simplify the code?

right, I'll remove that. 

best regards 
Michael 




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      reply	other threads:[~2021-05-18  8:06 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-03 14:08 Michael Graichen
2021-05-05  8:19 ` Lucas Stach
2021-05-18  8:05   ` Michael Graichen [this message]

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