Raspberry Pi bootloader adds this node to fdt, but if u-boot script doesn't reuse the tree provided by it, this information is lost.
Revision and serial are displayed in /proc/cpuinfo after boot.
Thanks to Ricardo Salveti from Foundries.io for the idea.
Signed-off-by: Anton Gerasimov anton.gerasimov@here.com --- board/raspberrypi/rpi/rpi.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-)
diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index 153a1fdcb7..5b14c48dd0 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -238,6 +238,8 @@ static uint32_t rev_scheme; static uint32_t rev_type; static const struct rpi_model *model;
+uint64_t serial; + #ifdef CONFIG_ARM64 static struct mm_region bcm2837_mem_map[] = { { @@ -381,8 +383,8 @@ static void set_serial_number(void) return; }
- snprintf(serial_string, sizeof(serial_string), "%016llx", - msg->get_board_serial.body.resp.serial); + serial = msg->get_board_serial.body.resp.serial; + snprintf(serial_string, sizeof(serial_string), "%016llx", serial); env_set("serial#", serial_string); }
@@ -475,6 +477,29 @@ void *board_fdt_blob_setup(void) return (void *)fw_dtb_pointer; }
+static int ft_add_revision_info(void *blob) { + int off; + int ret; + + off = fdt_subnode_offset(blob, 0, "system"); + + if (off < 0) { + off = fdt_add_subnode(blob, 0, "system"); + if (off < 0) + return -1; + } + + ret = fdt_setprop_u64(blob, off, "linux,serial", serial); + if (ret < 0) + return -1; + + ret = fdt_setprop_u32(blob, off, "linux,revision", revision); + if (ret < 0) + return -1; + + return 0; +} + int ft_board_setup(void *blob, bd_t *bd) { /* @@ -484,6 +509,8 @@ int ft_board_setup(void *blob, bd_t *bd) */ lcd_dt_simplefb_add_node(blob);
+ ft_add_revision_info(blob); + #ifdef CONFIG_EFI_LOADER /* Reserve the spin table */ efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);