This is a note to let you know that I've just added the patch titled arm64: dts: ti: k3-am64-mcu: remove incorrect UART base clock rates to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arm64-dts-ti-k3-am64-mcu-remove-incorrect-uart-base-.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit c6a29da786079ae063ce7439b90b4cbc3790eea7 Author: Matthias Schiffer <matthias.schiffer@xxxxxxxxxxxxxxx> Date: Tue Apr 19 09:51:57 2022 +0200 arm64: dts: ti: k3-am64-mcu: remove incorrect UART base clock rates [ Upstream commit 439677d416b17dd39964d5f7d64b742a2e51da5b ] We found that (at least some versions of) the sci-fw set the base clock rate for UARTs in the MCU domain to 96 MHz instead of the expected 48 MHz, leading to incorrect baud rates when used from Linux. As the 8250_omap driver will query the actual clock rate from the clk driver when clock-frequency is unset, removing the incorrect property is sufficient to fix the baud rate. Fixes: 8abae9389bdb ("arm64: dts: ti: Add support for AM642 SoC") Signed-off-by: Matthias Schiffer <matthias.schiffer@xxxxxxxxxxxxxxx> Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx> Reviewed-by: Vignesh Raghavendra <vigneshr@xxxxxx> Link: https://lore.kernel.org/r/20220419075157.189347-1-matthias.schiffer@xxxxxxxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi index 59cc58f7d0c8..93e684bbd66c 100644 --- a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi @@ -10,7 +10,6 @@ mcu_uart0: serial@4a00000 { compatible = "ti,am64-uart", "ti,am654-uart"; reg = <0x00 0x04a00000 0x00 0x100>; interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>; - clock-frequency = <48000000>; current-speed = <115200>; power-domains = <&k3_pds 149 TI_SCI_PD_EXCLUSIVE>; clocks = <&k3_clks 149 0>; @@ -21,7 +20,6 @@ mcu_uart1: serial@4a10000 { compatible = "ti,am64-uart", "ti,am654-uart"; reg = <0x00 0x04a10000 0x00 0x100>; interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_HIGH>; - clock-frequency = <48000000>; current-speed = <115200>; power-domains = <&k3_pds 160 TI_SCI_PD_EXCLUSIVE>; clocks = <&k3_clks 160 0>;