From: Martin Blumenstingl Date: Tue, 7 Mar 2023 22:26:51 +0000 (+0100) Subject: arm64: dts: meson-g12-common: Use the G12A UART compatible string X-Git-Tag: v6.6.17~5003^2~77 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f335201ba28fc20f7878127455dbae6e2f8eb6de;p=platform%2Fkernel%2Flinux-rpi.git arm64: dts: meson-g12-common: Use the G12A UART compatible string Switch meson-12-common.dtsi to use the Meson G12A specific UART compatible string. This enables the "divide XTAL by 2" divider which improves support for UART attached Bluetooth modules (for example RTL8822CS) running at a baud rate of 1500000. Without dividing XTAL (24MHz) by 2 a baud rate of 1500000 cannot be generated cleanly and the resulting jitter breaks communication with the module. Tested-by: Christian Hewitt Signed-off-by: Martin Blumenstingl Reviewed-by: Neil Armstrong Link: https://lore.kernel.org/r/20230307222651.2106615-4-martin.blumenstingl@googlemail.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi index 123a56f..904bcd4 100644 --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi @@ -2046,7 +2046,8 @@ }; uart_AO: serial@3000 { - compatible = "amlogic,meson-gx-uart", + compatible = "amlogic,meson-g12a-uart", + "amlogic,meson-gx-uart", "amlogic,meson-ao-uart"; reg = <0x0 0x3000 0x0 0x18>; interrupts = ; @@ -2056,7 +2057,8 @@ }; uart_AO_B: serial@4000 { - compatible = "amlogic,meson-gx-uart", + compatible = "amlogic,meson-g12a-uart", + "amlogic,meson-gx-uart", "amlogic,meson-ao-uart"; reg = <0x0 0x4000 0x0 0x18>; interrupts = ; @@ -2293,7 +2295,8 @@ }; uart_C: serial@22000 { - compatible = "amlogic,meson-gx-uart"; + compatible = "amlogic,meson-g12a-uart", + "amlogic,meson-gx-uart"; reg = <0x0 0x22000 0x0 0x18>; interrupts = ; clocks = <&xtal>, <&clkc CLKID_UART2>, <&xtal>; @@ -2302,7 +2305,8 @@ }; uart_B: serial@23000 { - compatible = "amlogic,meson-gx-uart"; + compatible = "amlogic,meson-g12a-uart", + "amlogic,meson-gx-uart"; reg = <0x0 0x23000 0x0 0x18>; interrupts = ; clocks = <&xtal>, <&clkc CLKID_UART1>, <&xtal>; @@ -2311,7 +2315,8 @@ }; uart_A: serial@24000 { - compatible = "amlogic,meson-gx-uart"; + compatible = "amlogic,meson-g12a-uart", + "amlogic,meson-gx-uart"; reg = <0x0 0x24000 0x0 0x18>; interrupts = ; clocks = <&xtal>, <&clkc CLKID_UART0>, <&xtal>;