From 4109aca06cb7b042ea791d0f9d3c9615bc3bf5cd Mon Sep 17 00:00:00 2001 From: David Brownell Date: Mon, 16 May 2005 17:19:55 -0700 Subject: [PATCH] Driver Core: driver model doc update This updates some driver data documentation: - removes references to some fields that haven't been there for a long time now, e.g. pre-kobject or even older; - giving more information about the probe() method; - adding an example of how platform_data is used Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- Documentation/driver-model/device.txt | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'Documentation/driver-model/device.txt') diff --git a/Documentation/driver-model/device.txt b/Documentation/driver-model/device.txt index 58cc5dc..a05ec50 100644 --- a/Documentation/driver-model/device.txt +++ b/Documentation/driver-model/device.txt @@ -76,6 +76,14 @@ driver_data: Driver-specific data. platform_data: Platform data specific to the device. + Example: for devices on custom boards, as typical of embedded + and SOC based hardware, Linux often uses platform_data to point + to board-specific structures describing devices and how they + are wired. That can include what ports are available, chip + variants, which GPIO pins act in what additional roles, and so + on. This shrinks the "Board Support Packages" (BSPs) and + minimizes board-specific #ifdefs in drivers. + current_state: Current power state of the device. saved_state: Pointer to saved state of the device. This is usable by -- cgit v1.1