| Message ID | 1413195395-3355-14-git-send-email-thierry.reding@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 10/13/2014 12:16 PM, Thierry Reding wrote: > From: Thierry Reding <treding@nvidia.com> > > Add a function, of_find_mipi_dsi_device_by_node(), that can be used to > resolve a phandle to a MIPI DSI device. > > Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Andrzej Hajda <a.hajda@samsung.com> -- Regards Andrzej > --- > drivers/gpu/drm/drm_mipi_dsi.c | 23 +++++++++++++++++++++++ > include/drm/drm_mipi_dsi.h | 1 + > 2 files changed, 24 insertions(+) > > diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c > index a0b9c7ea77a7..0067f914c1ea 100644 > --- a/drivers/gpu/drm/drm_mipi_dsi.c > +++ b/drivers/gpu/drm/drm_mipi_dsi.c > @@ -67,6 +67,29 @@ static struct bus_type mipi_dsi_bus_type = { > .pm = &mipi_dsi_device_pm_ops, > }; > > +static int of_device_match(struct device *dev, void *data) > +{ > + return dev->of_node == data; > +} > + > +/** > + * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a > + * device tree node > + * @np: device tree node > + * > + * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no > + * such device exists (or has not been registered yet). > + */ > +struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np) > +{ > + struct device *dev; > + > + dev = bus_find_device(&mipi_dsi_bus_type, NULL, np, of_device_match); > + > + return dev ? to_mipi_dsi_device(dev) : NULL; > +} > +EXPORT_SYMBOL(of_find_mipi_dsi_device_by_node); > + > static void mipi_dsi_dev_release(struct device *dev) > { > struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); > diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h > index 17ef2fbb09a5..8f025cc5ce99 100644 > --- a/include/drm/drm_mipi_dsi.h > +++ b/include/drm/drm_mipi_dsi.h > @@ -142,6 +142,7 @@ static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev) > return container_of(dev, struct mipi_dsi_device, dev); > } > > +struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np); > int mipi_dsi_attach(struct mipi_dsi_device *dsi); > int mipi_dsi_detach(struct mipi_dsi_device *dsi); > int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index a0b9c7ea77a7..0067f914c1ea 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -67,6 +67,29 @@ static struct bus_type mipi_dsi_bus_type = { .pm = &mipi_dsi_device_pm_ops, }; +static int of_device_match(struct device *dev, void *data) +{ + return dev->of_node == data; +} + +/** + * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a + * device tree node + * @np: device tree node + * + * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no + * such device exists (or has not been registered yet). + */ +struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np) +{ + struct device *dev; + + dev = bus_find_device(&mipi_dsi_bus_type, NULL, np, of_device_match); + + return dev ? to_mipi_dsi_device(dev) : NULL; +} +EXPORT_SYMBOL(of_find_mipi_dsi_device_by_node); + static void mipi_dsi_dev_release(struct device *dev) { struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 17ef2fbb09a5..8f025cc5ce99 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -142,6 +142,7 @@ static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev) return container_of(dev, struct mipi_dsi_device, dev); } +struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np); int mipi_dsi_attach(struct mipi_dsi_device *dsi); int mipi_dsi_detach(struct mipi_dsi_device *dsi); int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,