Re: [PATCH v4 6/6] i3c: master: dw: reattach device on first available location of address table

[Boris Brezillon <boris.brezillon@collabora.com>]

On Tue, 10 Dec 2019 14:40:49 +0000
Vitor Soares <Vitor.Soares@synopsys.com> wrote:

> ++João Pinto
> 
> Hi Przemysław,
> 
> Sorry for this, but please drop this patch from this series. Boris as 
> Maintainer could already merge it when gives rb tag.

Noted, I'll queue that one separately (IIUC, it's independent from the
rest of the series).

> 
> From: Przemysław Gaj <pgaj@cadence.com>
> Date: Tue, Dec 10, 2019 at 10:15:02
> 
> > From: Vitor Soares <vitor.soares@synopsys.com>
> > 
> > For today the reattach function only update the device address on the
> > controller.
> > 
> > Update the location to the first available too, will optimize the
> > enumeration process avoiding additional checks to keep the available
> > positions on address table consecutive.
> > 
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> > Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com>
> > ---
> > Change in v3:
> >   - None
> > 
> > Change in v2:
> >   - Add Boris rb-tag
> > ---
> >  drivers/i3c/master/dw-i3c-master.c | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> > 
> > diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
> > index b0ff0e12d84c..c6caba39a34b 100644
> > --- a/drivers/i3c/master/dw-i3c-master.c
> > +++ b/drivers/i3c/master/dw-i3c-master.c
> > @@ -899,6 +899,22 @@ static int dw_i3c_master_reattach_i3c_dev(struct i3c_dev_desc *dev,
> >  	struct dw_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
> >  	struct i3c_master_controller *m = i3c_dev_get_master(dev);
> >  	struct dw_i3c_master *master = to_dw_i3c_master(m);
> > +	int pos;
> > +
> > +	pos = dw_i3c_master_get_free_pos(master);
> > +
> > +	if (data->index > pos && pos > 0) {
> > +		writel(0,
> > +		       master->regs +
> > +		       DEV_ADDR_TABLE_LOC(master->datstartaddr, data->index));
> > +
> > +		master->addrs[data->index] = 0;
> > +		master->free_pos |= BIT(data->index);
> > +
> > +		data->index = pos;
> > +		master->addrs[pos] = dev->info.dyn_addr;
> > +		master->free_pos &= ~BIT(pos);
> > +	}
> >  
> >  	writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr),
> >  	       master->regs +
> > -- 
> > 2.14.0  
> 
> Best regards,
> Vitor Soares


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