On Thu, Mar 09, 2023 at 04:41:05PM +0100, Sascha Hauer wrote:
> On Thu, Mar 09, 2023 at 02:08:50PM +0100, Ahmad Fatoum wrote:
> > On 09.03.23 12:52, Sascha Hauer wrote:
> > > When devices are enabled with a device tree overlay the newly enabled
> > > devices can be probed by doing a of_probe(). This works fine for the
> > > regular platform devices, but doesn't work for devices which are not
> > > probed by the core, but by the subsystem. Prominent examples are I2C or
> > > SPI devices.
> > >
> > > This patch adds a struct device::rescan hook that subsystems can
> > > implement to trigger rescanning the device nodes.
> > >
> > > Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> > > ---
> > > drivers/of/platform.c | 11 +++++------
> > > include/driver.h | 6 ++++++
> > > 2 files changed, 11 insertions(+), 6 deletions(-)
> > >
> > > diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> > > index edb082b106..2e9abe32bc 100644
> > > --- a/drivers/of/platform.c
> > > +++ b/drivers/of/platform.c
> > > @@ -153,8 +153,10 @@ struct device *of_platform_device_create(struct device_node *np,
> > > * Linux uses the OF_POPULATED flag to skip already populated/created
> > > * devices.
> > > */
> > > - if (np->dev)
> > > + if (np->dev) {
> > > + device_rescan(np->dev);
> > > return np->dev;
> > > + }
> > >
> > > /* count the io resources */
> > > if (of_can_translate_address(np))
> > > @@ -420,11 +422,8 @@ static struct device *of_device_create_on_demand(struct device_node *np)
> > > if (!parent)
> > > return NULL;
> > >
> > > - if (!np->dev && parent->dev) {
> > > - ret = device_detect(parent->dev);
> > > - if (ret && ret != -ENOSYS)
> > > - return ERR_PTR(ret);
> > > - }
> >
> > The int ret definition at the top of the function should be ok to be removed now.
>
> No, it's still used.
Hm, looked at the wrong function it seems. Compiler says it's unused.
Sascha
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