From 27326c7ee269ff351bba8c2461e19f29d66b6a3a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Heiko=20St=C3=BCbner?= Date: Sat, 18 Feb 2017 19:46:21 +0100 Subject: dm: allow limiting pre-reloc markings to spl or tpl Right now the u-boot,dm-pre-reloc flag will make each marked node always appear in both spl and tpl. But systems needing an additional tpl might have special constraints for each, like the spl needing to be very tiny. So introduce two additional flags to mark nodes for only spl or tpl environments and introduce a function dm_fdt_pre_reloc to automate the necessary checks in code instances checking for pre-relocation flags. The behaviour of the original flag stays untouched and still marks a node for both spl and tpl. Signed-off-by: Heiko Stuebner Reviewed-by: Simon Glass Tested-by: Kever Yang --- include/dm/util.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'include/dm') diff --git a/include/dm/util.h b/include/dm/util.h index 15daa3d19f..32060ab30e 100644 --- a/include/dm/util.h +++ b/include/dm/util.h @@ -48,4 +48,30 @@ static inline void dm_dump_devres(void) } #endif +/** + * Check if a dt node should be or was bound before relocation. + * + * Devicetree nodes can be marked as needed to be bound + * in the loader stages via special devicetree properties. + * + * Before relocation this function can be used to check if nodes + * are required in either SPL or TPL stages. + * + * After relocation and jumping into the real U-Boot binary + * it is possible to determine if a node was bound in one of + * SPL/TPL stages. + * + * There are 3 settings currently in use + * - + * - u-boot,dm-pre-reloc: legacy and indicates any of TPL or SPL + * Existing platforms only use it to indicate nodes needee in + * SPL. Should probably be replaced by u-boot,dm-spl for + * existing platforms. + * @blob: devicetree + * @offset: node offset + * + * Returns true if node is needed in SPL/TL, false otherwise. + */ +int dm_fdt_pre_reloc(const void *blob, int offset); + #endif -- cgit v1.2.3