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author | Thierry Reding <treding@nvidia.com> | 2014-08-06 08:53:39 +0200 |
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committer | Thierry Reding <treding@nvidia.com> | 2014-11-13 13:56:14 +0100 |
commit | 3ef0592426da2e21bd3a265e9376cddffff931c1 (patch) | |
tree | 9ae8b9f708422585dfbf76db110f08beffa29e9a /drivers/gpu/drm/drm_mipi_dsi.c | |
parent | drm/dsi: Implement DCS set_{column,page}_address commands (diff) | |
download | linux-3ef0592426da2e21bd3a265e9376cddffff931c1.tar.xz linux-3ef0592426da2e21bd3a265e9376cddffff931c1.zip |
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>
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dsi.c')
-rw-r--r-- | drivers/gpu/drm/drm_mipi_dsi.c | 23 |
1 files changed, 23 insertions, 0 deletions
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); |