[PATCH] i2c: exynos5: Preserve high speed master code
krzk at kernel.org
Wed Feb 17 03:43:42 EST 2021
On Wed, Feb 17, 2021 at 09:32:11AM +0100, Jesper Nilsson wrote:
> On Wed, Feb 17, 2021 at 09:07:47AM +0100, Krzysztof Kozlowski wrote:
> > On Tue, Feb 16, 2021 at 11:09:33PM +0100, Marten Lindahl wrote:
> > > > Any reason why not "|= MASTER_ID(i2c->adap.nr)" here instead of more
> > > > expensive IO read? It's quite important because your current code will
> > > > bitwise-or old I2C slave address with a new one... This should break
> > > > during tests with multiple I2C slave devices, shouldn't it?
> > > >
> > >
> > > You are correct. It is better to use the macro instead, and yes,
> > > safer too. I only have one device that supports high speed i2c, but
> > > I get your point. It could potentially break.
> > >
> > > > On which HW did you test it?
> > >
> > > I used an Artpec development board as master and INA230EVM board
> > > as slave.
> > Artpec development board with? What SoC?
> The ARTPEC-line of SoC:s are Axis Communications own ASICs, in the latest iteration
> it's a Cortex-53 and includes instances of the exynos5 HSI2C ip.
Cool! Good to see that this code is re-used. :)
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