linux-kernel - Re: [PATCH 2/4] i2c: mediatek: Support DMA mask range over 33-bits

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Date:   Thu, 23 Jul 2020 14:03:25 +0800
From:   Qii Wang <qii.wang@...iatek.com>
To:     Yingjoe Chen <yingjoe.chen@...iatek.com>
CC:     <wsa@...-dreams.de>, <qiangming.xia@...iatek.com>,
        <devicetree@...r.kernel.org>, <srv_heupstream@...iatek.com>,
        <leilk.liu@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <robh+dt@...nel.org>, <linux-mediatek@...ts.infradead.org>,
        <linux-i2c@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/4] i2c: mediatek: Support DMA mask range over 33-bits

On Thu, 2020-07-23 at 09:24 +0800, Yingjoe Chen wrote:
> On Wed, 2020-07-22 at 20:31 +0800, Qii Wang wrote:
> > Replace 'support_33bits with 'dma_max_support' for DMA mask
> > operation, and replace 'mtk_i2c_set_4g_mode' with 'upper_32_bits'.
> 
> This doesn't explain why we need this patch. How about:
> 
> Newer MTK chip support more than 8GB of dram. Replace support_33bits
> with more general dma_max_support.
> 

ok, Thanks for your comments.

> 
> > 
> > Signed-off-by: Qii Wang <qii.wang@...iatek.com>
> > ---
> >  drivers/i2c/busses/i2c-mt65xx.c | 37 +++++++++++++++++--------------------
> >  1 file changed, 17 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> > index e6b984a..e475877 100644
> > --- a/drivers/i2c/busses/i2c-mt65xx.c
> > +++ b/drivers/i2c/busses/i2c-mt65xx.c
> > @@ -209,6 +209,7 @@ struct mtk_i2c_compatible {
> >  	unsigned char dma_sync: 1;
> >  	unsigned char ltiming_adjust: 1;
> >  	unsigned char apdma_sync: 1;
> > +	unsigned char max_dma_support;
> 
> support_33bits is no longer used. Please remove it.
> 
> Joe.C
> 

ok.

>