When the coprocessor has been started, provide the context to Linux
kernel so it can handle it:
- update the coprocessor node of kernel DeviceTree with the
"early-booted" property.
- write the resource table address in a dedicated backup register.
Signed-off-by: Fabien Dessenne <fabien.desse...@st.com>
---
board/st/stm32mp1/stm32mp1.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 18f9b84..8c669d0 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -891,6 +891,7 @@ void board_mtdparts_default(const char **mtdids, const char
**mtdparts)
#if defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
+ int off, id = 0; /* Copro id fixed to 0 as only one coproc on mp1 */
#ifdef CONFIG_FDT_FIXUP_PARTITIONS
struct node_info nodes[] = {
{ "st,stm32f469-qspi", MTD_DEV_TYPE_NOR, },
@@ -899,6 +900,17 @@ int ft_board_setup(void *blob, bd_t *bd)
fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
#endif
+ /* Update DT if coprocessor started */
+ off = fdt_path_offset(blob, "/mlahb/m4@10000000");
+ if (off > 0) {
+ if (!rproc_is_running(id)) {
+ fdt_setprop_empty(blob, off, "early-booted");
+ } else {
+ fdt_delprop(blob, off, "early-booted");
+ writel(0, TAMP_COPRO_RSC_TBL_ADDRESS);
+ }
+ }
+
return 0;
}
#endif
@@ -918,10 +930,8 @@ static void board_copro_image_process(ulong fw_image,
size_t fw_size)
printf("Load Remote Processor %d with data@addr=0x%08lx %u bytes:%s\n",
id, fw_image, fw_size, ret ? " Failed!" : " Success!");
- if (!ret) {
+ if (!ret)
rproc_start(id);
- env_set("copro_state", "booted");
- }
}
U_BOOT_FIT_LOADABLE_HANDLER(IH_TYPE_COPRO, board_copro_image_process);
--
2.7.4
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