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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 <a.hajda@samsung.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2014-08-06 08:53:39 +02:00
parent 3b46d4a0de
commit 3ef0592426
2 changed files with 24 additions and 0 deletions
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23
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -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);

1
include/drm/drm_mipi_dsi.h
View File

@ -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,