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.
Acked-by: Andrzej Hajda a.hajda@samsung.com Signed-off-by: Thierry Reding treding@nvidia.com --- 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 97dcbaa6a301..afaa36c37fcb 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 6031593ee231..16c2e9890631 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -160,6 +160,7 @@ 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,