[PATCH 1/1] rpi: copy over uart clock-frequency in DT

Bruno Leite brunosampaioleite at gmail.com
Tue Apr 15 10:30:14 CEST 2025


From: Bruno Leite <brule at prevas.dk>

rpi5 firmware sets uart_clk clock-frequency in
the firmware and patches it to the DT, copy it
over when loading a new DT.

Signed-off-by: Bruno Leite <brule at prevas.dk>

---

 board/raspberrypi/rpi/rpi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
index 70d3c35499b..5c84c324c71 100644
--- a/board/raspberrypi/rpi/rpi.c
+++ b/board/raspberrypi/rpi/rpi.c
@@ -602,6 +602,9 @@ void  update_fdt_from_fw(void *fdt, void *fw_fdt)
 
 	/* Bluetooth device address as provided by the firmware */
 	copy_property(fdt, fw_fdt, "/soc/serial at 7e201000/bluetooth", "local-bd-address");
+
+	/* copy uart clk as provided by the firmware */
+	copy_property(fdt, fw_fdt, "/clocks/clk-uart", "clock-frequency");
 }
 
 int ft_board_setup(void *blob, struct bd_info *bd)
-- 
2.45.2



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