linux-kernel - RE: [PATCH net-next] ptp: clockmatrix: use rsmu driver to access i2c/spi bus

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Date:   Thu, 23 Sep 2021 16:29:44 +0000
From:   Min Li <min.li.xe@...esas.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     "richardcochran@...il.com" <richardcochran@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>
Subject: RE: [PATCH net-next] ptp: clockmatrix: use rsmu driver to access
 i2c/spi bus



> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: September 23, 2021 11:31 AM
> To: Min Li <min.li.xe@...esas.com>
> Cc: richardcochran@...il.com; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; lee.jones@...aro.org
> Subject: Re: [PATCH net-next] ptp: clockmatrix: use rsmu driver to access
> i2c/spi bus
> 
> On Wed, 22 Sep 2021 09:57:14 -0400 min.li.xe@...esas.com wrote:
> > From: Min Li <min.li.xe@...esas.com>
> >
> > rsmu (Renesas Synchronization Management Unit ) driver is located in
> > drivers/mfd and responsible for creating multiple devices including
> > clockmatrix phc, which will then use the exposed regmap and mutex
> > handle to access i2c/spi bus.
> 
> Does not build on 32 bit. You need to use division helpers.

Hi Jakub

I did build it through 32 bit arm and didn't get the problem.

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-

Thanks

Min