[U-Boot] [PATCH] common: add board specific hook for os preboot config

[Gerard Salvatella]

Some boards require specific configuration prior to booting the kernel.
For instance, our boards require shutting down the display to avoid
fading transitions before the drivers are reloaded by the kernel. This
could be facilitated by adding an extra hook during the os booting
process.

Signed-off-by: Gerard Salvatella <gerard.salvatella at toradex.com>
---
 common/bootm_os.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common/bootm_os.c b/common/bootm_os.c
index f4bd905909..1e7af56b64 100644
--- a/common/bootm_os.c
+++ b/common/bootm_os.c
@@ -505,9 +505,16 @@ __weak void arch_preboot_os(void)
        /* please define platform specific arch_preboot_os() */
 }

+/* Allow for board specific config before we boot */
+__weak void board_preboot_os(void)
+{
+       /* please define board specific board_preboot_os() */
+}
+
 int boot_selected_os(int argc, char * const argv[], int state,
                     bootm_headers_t *images, boot_os_fn *boot_fn)
 {
+       board_preboot_os();
        arch_preboot_os();
        boot_fn(state, argc, argv, images);

--
2.18.0


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