From 9bf0bf029cc3ddea57cab66ea49db0d69048ee99 Mon Sep 17 00:00:00 2001 From: Martin Blumenstingl Date: Wed, 22 Feb 2023 21:47:16 +0100 Subject: [PATCH 063/120] FROMLIST(v2): 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 --- arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi index bb2e86073261..ec78283d9a9e 100644 --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi @@ -2040,7 +2040,8 @@ pwm_AO_cd: pwm@2000 { }; 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 = ; @@ -2050,7 +2051,8 @@ uart_AO: serial@3000 { }; 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 = ; @@ -2287,7 +2289,8 @@ clk_msr: clock-measure@18000 { }; 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>; @@ -2296,7 +2299,8 @@ uart_C: serial@22000 { }; 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>; @@ -2305,7 +2309,8 @@ uart_B: serial@23000 { }; 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>; -- 2.34.1