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Date: Mon, 17 Feb 2020 15:59:17 +0100 From: Boris Brezillon <boris.brezillon@...labora.com> To: Vitor Soares <Vitor.Soares@...opsys.com> Cc: linux-kernel@...r.kernel.org, linux-i3c@...ts.infradead.org, Joao.Pinto@...opsys.com, Jose.Abreu@...opsys.com, bbrezillon@...nel.org, gregkh@...uxfoundation.org, wsa@...-dreams.de, arnd@...db.de, broonie@...nel.org Subject: Re: [RFC v2 1/4] i3c: master: export i3c_masterdev_type On Mon, 17 Feb 2020 15:56:23 +0100 Boris Brezillon <boris.brezillon@...labora.com> wrote: > On Wed, 29 Jan 2020 13:17:32 +0100 > Vitor Soares <Vitor.Soares@...opsys.com> wrote: > > > Exporte i3c_masterdev_type so i3cdev module can verify if an i3c device > > is a master. > > > > Signed-off-by: Vitor Soares <vitor.soares@...opsys.com> > > --- > > drivers/i3c/internals.h | 1 + > > drivers/i3c/master.c | 3 ++- > > 2 files changed, 3 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h > > index 86b7b44..bc062e8 100644 > > --- a/drivers/i3c/internals.h > > +++ b/drivers/i3c/internals.h > > @@ -11,6 +11,7 @@ > > #include <linux/i3c/master.h> > > > > extern struct bus_type i3c_bus_type; > > +extern const struct device_type i3c_masterdev_type; > > > > void i3c_bus_normaluse_lock(struct i3c_bus *bus); > > void i3c_bus_normaluse_unlock(struct i3c_bus *bus); > > diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c > > index 7f8f896..8a0ba34 100644 > > --- a/drivers/i3c/master.c > > +++ b/drivers/i3c/master.c > > @@ -523,9 +523,10 @@ static void i3c_masterdev_release(struct device *dev) > > of_node_put(dev->of_node); > > } > > > > -static const struct device_type i3c_masterdev_type = { > > +const struct device_type i3c_masterdev_type = { > > .groups = i3c_masterdev_groups, > > }; > > +EXPORT_SYMBOL_GPL(i3c_masterdev_type); > > No need to export the symbol, removing the static and adding the > definition to internal.h should work just fine (i3c.o contains > both master.o and device.o). Hm, my bad. Looks like i3cdev is a separate module/driver. If that's the case, it should not have direct access to internals.h. I see 2 options here: 1/ make the i3cdev logic part of the core 2/ provide helpers to find devices by type But maybe none of that is needed if you let userspace bind i3c devices to the i3cdev driver. > > > > > static int i3c_bus_set_mode(struct i3c_bus *i3cbus, enum i3c_bus_mode mode, > > unsigned long max_i2c_scl_rate) >
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