From accd4b19b39bde7398aa8d1a8eeb66f3a14dde5b Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 13 Oct 2014 23:41:50 -0600 Subject: dm: core: Allow parents to pass data to children during probe Buses sometimes want to pass data to their children when they are probed. For example, a SPI bus may want to tell the slave device about the chip select it is connected to. Add a new function to permit the parent data to be supplied to the child. Signed-off-by: Simon Glass Acked-by: Jagannadha Sutradharudu Teki --- include/dm/device.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/dm/device.h') diff --git a/include/dm/device.h b/include/dm/device.h index 160cd58..56862d3 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -139,6 +139,10 @@ struct udevice_id { * @per_child_auto_alloc_size: Each device can hold private data owned by * its parent. If required this will be automatically allocated if this * value is non-zero. + * TODO(sjg@chromium.org): I'm considering dropping this, and just having + * device_probe_child() pass it in. So far the use case for allocating it + * is SPI, but I found that unsatisfactory. Since it is here I will leave it + * until things are clearer. * @ops: Driver-specific operations. This is typically a list of function * pointers defined by the driver, to implement driver functions required by * the uclass. -- cgit v1.1