uboot-tools/rpi-uart-clock-when-loading-kernel-with-non-boot-DT.patch
2025-06-20 16:38:16 +01:00

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From: Bruno Leite <brunosampaioleite@gmail.com>
To: u-boot@lists.denx.de
Cc: pbrobinson@gmail.com, Matthias Brugger <mbrugger@suse.com>,
clast@prevas.dk, ravi@prevas.dk, Bruno Leite <brule@prevas.dk>,
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Subject: [PATCH 1/1] rpi: copy over uart clock-frequency in DT
Date: Tue, 15 Apr 2025 10:30:14 +0200
Message-ID: <20250415083017.3523317-2-brunosampaioleite@gmail.com>
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From: Bruno Leite <brule@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@prevas.dk>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
---
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@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)