Hello Ludovic,
On Tue, Oct 31, 2017 at 04:55:42PM +0100, Ludovic Desroches wrote:
> On Fri, Oct 27, 2017 at 05:12:00PM +0200, Juergen Fitschen wrote:
> > Slave mode driver is based on the concept of i2c-designware driver.
> >
> > Signed-off-by: Juergen Fitschen <me@xxxxxx>
> > ---
> > drivers/i2c/busses/Makefile | 3 +
> > drivers/i2c/busses/i2c-at91-core.c | 13 +++-
> > drivers/i2c/busses/i2c-at91-slave.c | 147 ++++++++++++++++++++++++++++++++++++
> > drivers/i2c/busses/i2c-at91.h | 30 +++++++-
> > 4 files changed, 189 insertions(+), 4 deletions(-)
> > create mode 100644 drivers/i2c/busses/i2c-at91-slave.c
> >
>
> Adding an example in Documentation/devicetree/bindings/i2c/i2c-at91.txt
> could be useful.
I will add this.
> > diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
> > index 2a79c3d..b38fb8e9 100644
> > --- a/drivers/i2c/busses/Makefile
> > +++ b/drivers/i2c/busses/Makefile
> > @@ -34,6 +34,9 @@ obj-$(CONFIG_I2C_ALTERA) += i2c-altera.o
> > obj-$(CONFIG_I2C_ASPEED) += i2c-aspeed.o
> > obj-$(CONFIG_I2C_AT91) += i2c-at91.o
> > i2c-at91-objs := i2c-at91-core.o i2c-at91-master.o
> > +ifeq ($(CONFIG_I2C_SLAVE),y)
> > + i2c-at91-objs += i2c-at91-slave.o
> > +endif
>
> As Designware driver, I would add an entry in 'I2C Hardware Bus
> Support'.
>
> If a user wants to use the I2C GPIO driver as the I2C slave (once it has
> the slave support), it's not useful to embed i2c-at91-slave code.
Good point.
> > +void at91_init_twi_bus_slave(struct at91_twi_dev *dev)
> > +{
> > + at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_MSDIS);
> > + if (dev->slave_detected && dev->smr) {
>
> slave_detected has been checked in the caller. smr has been set just
> before calling at91_init_twi_bus().
Whoops! Better safe than sorry ;) I will remove that check.
Thank you for testing everything! I am curious about how the other MPUs will
perform with the patchset. I have a SAMA5D35 at hand and can test everything on
this MPU in the next days.
Best regards
Juergen
