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dm: core: add a function to decode display timings

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The patch adds a function to get display timings from the device tree
node attached to the device.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Dario Binacchi
2020-12-30 00:16:26 +01:00
committed by Lokesh Vutla
parent 0f4effb05b
commit 15daa4860b
4 changed files with 156 additions and 0 deletions
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24
include/dm/read.h
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@@ -678,6 +678,23 @@ int dev_get_child_count(const struct udevice *dev);
*/
int dev_read_pci_bus_range(const struct udevice *dev, struct resource *res);
/**
* dev_decode_display_timing() - decode display timings
*
* Decode display timings from the supplied 'display-timings' node.
* See doc/device-tree-bindings/video/display-timing.txt for binding
* information.
*
* @dev: device to read DT display timings from. The node linked to the device
* contains a child node called 'display-timings' which in turn contains
* one or more display timing nodes.
* @index: index number to read (0=first timing subnode)
* @config: place to put timings
* @return 0 if OK, -FDT_ERR_NOTFOUND if not found
*/
int dev_decode_display_timing(const struct udevice *dev, int index,
struct display_timing *config);
#else /* CONFIG_DM_DEV_READ_INLINE is enabled */
static inline int dev_read_u32(const struct udevice *dev,
@@ -1000,6 +1017,13 @@ static inline int dev_get_child_count(const struct udevice *dev)
return ofnode_get_child_count(dev_ofnode(dev));
}
static inline int dev_decode_display_timing(const struct udevice *dev,
int index,
struct display_timing *config)
{
return ofnode_decode_display_timing(dev_ofnode(dev), index, config);
}
#endif /* CONFIG_DM_DEV_READ_INLINE */
/**