From 3ef0592426da2e21bd3a265e9376cddffff931c1 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Wed, 6 Aug 2014 08:53:39 +0200 Subject: [PATCH] drm/dsi: Resolve MIPI DSI device from phandle 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 Reviewed-by: Sean Paul Signed-off-by: Thierry Reding --- 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 2f39372e58b6..3850b3529601 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 061a792daf7d..ea0d982058c3 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -163,6 +163,7 @@ 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, -- 2.34.1