linux-kernel - RE: [EXT] Re: i2c: imx: support slave mode for imx I2C driver

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Date:   Mon, 12 Aug 2019 07:11:22 +0000
From:   Biwen Li <biwen.li@....com>
To:     Sascha Hauer <s.hauer@...gutronix.de>
CC:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "wsa@...-dreams.de" <wsa@...-dreams.de>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Laurentiu Tudor <laurentiu.tudor@....com>
Subject: RE: [EXT] Re: i2c: imx: support slave mode for imx I2C driver

> Subject: Re: [EXT] Re: i2c: imx: support slave mode for imx I2C driver
> 
> Caution: EXT Email
> 
> On Fri, Aug 09, 2019 at 04:04:45AM +0000, Biwen Li wrote:
> > >
> > > Hi,
> > >
> > > On Thu, Aug 08, 2019 at 11:53:43AM +0800, Biwen Li wrote:
> > > > The patch supports slave mode for imx I2C driver
> > > >
> > > > Signed-off-by: Biwen Li <biwen.li@....com>
> > > > ---
> > > >  drivers/i2c/busses/i2c-imx.c | 199
> > > > ++++++++++++++++++++++++++++++++---
> > > >  1 file changed, 185 insertions(+), 14 deletions(-)
> > > >
> > > > diff --git a/drivers/i2c/busses/i2c-imx.c
> > > > b/drivers/i2c/busses/i2c-imx.c index b1b8b938d7f4..f7583a9fa56f
> > > > 100644
> > > > --- a/drivers/i2c/busses/i2c-imx.c
> > > > +++ b/drivers/i2c/busses/i2c-imx.c
> > > > @@ -202,6 +202,9 @@ struct imx_i2c_struct {
> > > >       struct pinctrl_state *pinctrl_pins_gpio;
> > > >
> > > >       struct imx_i2c_dma      *dma;
> > > > +#if IS_ENABLED(CONFIG_I2C_SLAVE)
> > > > +     struct i2c_client               *slave;
> > > > +#endif /* CONFIG_I2C_SLAVE */
> > >
> > > Other drivers just do a "select I2C_SLAVE" in Kconfig to get rid of
> > > these #ifs. We should do the same.
> > Hi sascha, I don't know your meaning, could you let it clearer?
> 
> Other drivers have "select I2C_SLAVE" in Kconfig, so they do not need any #ifdef
> CONFIG_I2C_SLAVE as this is always true.
Okay, sascha, got it, I will remove the option in v2, thanks.
> 
> Sascha
> 
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