linux-kernel - Re: [PATCH v4 3/3] i2c: mpc: Use i2c-scl-clk-low-timeout-ms i2c property

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Date:   Tue, 14 Mar 2023 23:07:46 +0100
From:   Andi Shyti <andi.shyti@...nel.org>
To:     Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Cc:     Andi Shyti <andi.shyti@...nel.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Wolfram Sang <wsa@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Ryan Chen <ryan_chen@...eedtech.com>
Subject: Re: [PATCH v4 3/3] i2c: mpc: Use i2c-scl-clk-low-timeout-ms i2c
 property

> Just to be a pain the subject line still says "ms"

I have changed hundreds of /ms/us/ in this last half an hour...
of course I forgot some :)

There is also one in the comment.

Thanks for spotting it, Chris!

Andi

> On 15/03/23 10:56, Andi Shyti wrote:
> > "fsl,timeout" is marked as deprecated and replaced by the
> > "i2c-scl-clk-low-timeout-us" i2c property.
> >
> > Use this latter and, in case it is missing, for back
> > compatibility, check whether we still have "fsl,timeout" defined.
> >
> > Signed-off-by: Andi Shyti <andi.shyti@...nel.org>
> > Reviewed-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> > Tested-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> > ---
> >   drivers/i2c/busses/i2c-mpc.c | 12 +++++++++++-
> >   1 file changed, 11 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
> > index 87e5c1725750f..e8798f9c23fcc 100644
> > --- a/drivers/i2c/busses/i2c-mpc.c
> > +++ b/drivers/i2c/busses/i2c-mpc.c
> > @@ -843,8 +843,18 @@ static int fsl_i2c_probe(struct platform_device *op)
> >   			mpc_i2c_setup_8xxx(op->dev.of_node, i2c, clock);
> >   	}
> >   
> > +	/*
> > +	 * "fsl,timeout" has been marked as deprecated and, to maintain
> > +	 * backward compatibility, we will only look for it if
> > +	 * "i2c-scl-clk-low-timeout-ms" is not present.
> > +	 */
> >   	result = of_property_read_u32(op->dev.of_node,
> > -				      "fsl,timeout", &mpc_ops.timeout);
> > +				      "i2c-scl-clk-low-timeout-us",
> > +				      &mpc_ops.timeout);
> > +	if (result == -EINVAL)
> > +		result = of_property_read_u32(op->dev.of_node,
> > +					      "fsl,timeout", &mpc_ops.timeout);
> > +
> >   	if (!result) {
> >   		mpc_ops.timeout *= HZ / 1000000;
> >   		if (mpc_ops.timeout < 5)