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dm: core: Tidy up comments in device.h 

Correct a few nits found in a recent review. Expand the comments in
dev_get_driver_data() to make it clearer.

Signed-off-by: Simon Glass <sjg@chromium.org>
utp
Simon Glass 2015-09-28 23:32:06 -06:00
parent 99b81a4d86
commit 8d1f3a9daf
1 changed files with 16 additions and 3 deletions
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19
include/dm/device.h
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@ -278,13 +278,26 @@ struct udevice *dev_get_parent(struct udevice *child);
* dev_get_driver_data() - get the driver data used to bind a device
*
* When a device is bound using a device tree node, it matches a
* particular compatible string as in struct udevice_id. This function
* particular compatible string in struct udevice_id. This function
* returns the associated data value for that compatible string. This is
* the 'data' field in struct udevice_id.
*
* As an example, consider this structure:
* static const struct udevice_id tegra_i2c_ids[] = {
* { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
* { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
* { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
* { }
* };
*
* When driver model finds a driver for this it will store the 'data' value
* corresponding to the compatible string it matches. This function returns
* that value. This allows the driver to handle several variants of a device.
*
* For USB devices, this is the driver_info field in struct usb_device_id.
*
* @dev: Device to check
* @return driver data (0 if none is provided)
*/
ulong dev_get_driver_data(struct udevice *dev);
@ -299,7 +312,7 @@ ulong dev_get_driver_data(struct udevice *dev);
*/
const void *dev_get_driver_ops(struct udevice *dev);
/*
/**
* device_get_uclass_id() - return the uclass ID of a device
*
* @dev: Device to check
@ -307,7 +320,7 @@ const void *dev_get_driver_ops(struct udevice *dev);
*/
enum uclass_id device_get_uclass_id(struct udevice *dev);
/*
/**
* dev_get_uclass_name() - return the uclass name of a device
*
* This checks that dev is not NULL.