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From: <Ivan.Griffin@microchip.com>
To: <michael@walle.cc>, <padmarao.b@gmail.com>
Cc: <anup.patel@wdc.com>, <atish.patra@wdc.com>, <bmeng.cn@gmail.com>,
	<Conor.Dooley@microchip.com>, <Cyril.Jean@microchip.com>,
	<Daire.McNamara@microchip.com>, <hs@denx.de>,
	<Lewis.Hanly@microchip.com>, <Padmarao.Begari@microchip.com>,
	<rick@andestech.com>, <u-boot@lists.denx.de>,
	<Valentina.FernandezAlanis@microchip.com>
Subject: Re: [PATCH v1 4/5] net: macb: Compatible as per device tree
Date: Thu, 11 Nov 2021 13:17:10 +0000	[thread overview]
Message-ID: <DM6PR11MB4380525E8CFA5011FD4D6FA698949@DM6PR11MB4380.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20211111125441.3344243-1-michael@walle.cc>

> I agree with Bin here. You shouldn't introduce a new compatible just for
> u-boot. If you need one, please to it first in linux and get an ACK there.
> Or at least there should be patches for it pending in linux and it should
> be likely, that they will be accepted.
> 
> Please work towards having one binding for u-boot and linux.
> 
> -michael

I think both Michael and Bin are right, but that maybe this has gone circular.

IIRC, Linux *doesn't​ need* any extra bindings because its driver already
supports 64-bit DMA.

Padmarao's original patch added equivalent 64-bit functionality to the
driver in U-Boot, but this was rejected.

Instead I think the suggestion was to add a device-tree binding to choose 32 or
64-bit DMA...  however, there is no reasonably way of upstreaming this into
the Linux device-tree, as Linux doesn't need it... so he is left in a Catch-22.

A way forward may be to go back to his original approach and get the U-Boot
driver functionality updated so that it works similarly to the Linux driver
(and thus can use the same device-tree stanza)?

  reply	other threads:[~2021-11-11 16:17 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-22  8:56 [PATCH v1 0/5] Update Microchip PolarFire SoC support Padmarao Begari
2021-10-22  8:56 ` [PATCH v1 1/5] riscv: dts: Split Microchip device tree Padmarao Begari
2021-11-01  8:34   ` Leo Liang
2021-11-01  8:41   ` Bin Meng
2021-11-02  9:52     ` Padmarao Begari
2021-10-22  8:56 ` [PATCH v1 2/5] riscv: Update Microchip MPFS Icicle Kit support Padmarao Begari
2021-11-01  8:36   ` Leo Liang
2021-11-01  8:43   ` Bin Meng
2021-11-02 10:38     ` Padmarao Begari
2021-10-22  8:56 ` [PATCH v1 3/5] i2c: Add Microchip PolarFire SoC I2C driver Padmarao Begari
2021-11-01  8:53   ` Leo Liang
2021-10-22  8:56 ` [PATCH v1 4/5] net: macb: Compatible as per device tree Padmarao Begari
2021-11-01  8:30   ` Leo Liang
2021-11-01  8:44   ` Bin Meng
2021-11-02 11:03     ` Padmarao Begari
2021-11-02 12:45       ` Bin Meng
2021-11-03 11:47         ` Padmarao Begari
2021-11-03 13:10           ` Padmarao Begari
2021-11-11  8:07             ` Bin Meng
2021-11-11  9:06               ` Padmarao Begari
2021-11-11 12:54                 ` Michael Walle
2021-11-11 13:17                   ` Ivan.Griffin [this message]
2021-11-12  1:28                     ` Bin Meng
2021-11-12  9:36                       ` Padmarao Begari
2021-11-11 13:20                   ` Conor.Dooley
2021-11-11  9:41   ` macb clock handling (Was: [PATCH v1 4/5] net: macb: Compatible as per device tree) Heiko Stübner
2021-11-25 19:32     ` Heiko Stübner
2021-10-22  8:56 ` [PATCH v1 5/5] doc: board: Update Microchip MPFS Icicle Kit doc Padmarao Begari
2021-11-01  8:33   ` Leo Liang
2021-11-01  8:46   ` Bin Meng
2021-11-02 11:04     ` Padmarao Begari

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