From 08a5b4bd6cc14ad999a2d9a389f8b8b9dcea1682 Mon Sep 17 00:00:00 2001 From: "Ivan T. Ivanov" Date: Tue, 23 Jan 2024 10:07:55 +0200 Subject: [PATCH] rpi5: Use devicetree to retrieve board revision Firmware on RPi5 return error on board revision query through firmware interface, but on the other hand it fills "linux,revision" in "system" node, so use it to detect board revision. system { linux,revision = <0xc04170>; linux,serial = <0x6cf44e80 0x3c533ede>; }; Reviewed-by: Matthias Brugger Tested-by: Jens Maus Tested-by: Darko Alavanja Signed-off-by: Ivan T. Ivanov Signed-off-by: Matthias Brugger --- board/raspberrypi/rpi/rpi.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index cd823ad746..2851ebc985 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -171,6 +171,11 @@ static const struct rpi_model rpi_models_new_scheme[] = { DTB_DIR "bcm2711-rpi-cm4.dtb", true, }, + [0x17] = { + "5 Model B", + DTB_DIR "bcm2712-rpi-5-b.dtb", + true, + }, }; static const struct rpi_model rpi_models_old_scheme[] = { @@ -429,15 +434,27 @@ static void get_board_revision(void) int ret; const struct rpi_model *models; uint32_t models_count; + ofnode node; BCM2835_MBOX_INIT_HDR(msg); BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); if (ret) { - printf("bcm2835: Could not query board revision\n"); /* Ignore error; not critical */ - return; + node = ofnode_path("/system"); + if (!ofnode_valid(node)) { + printf("bcm2835: Could not find /system node\n"); + return; + } + + ret = ofnode_read_u32(node, "linux,revision", &revision); + if (ret) { + printf("bcm2835: Could not find linux,revision\n"); + return; + } + } else { + revision = msg->get_board_rev.body.resp.rev; } /* @@ -451,7 +468,6 @@ static void get_board_revision(void) * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 */ - revision = msg->get_board_rev.body.resp.rev; if (revision & 0x800000) { rev_scheme = 1; rev_type = (revision >> 4) & 0xff; -- 2.39.5