Commit f335201b authored by Martin Blumenstingl's avatar Martin Blumenstingl Committed by Greg Kroah-Hartman
Browse files

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: default avatarChristian Hewitt <christianshewitt@gmail.com>
Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230307222651.2106615-4-martin.blumenstingl@googlemail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 804e6d69

arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi

+10 −5
Original line number Diff line number Diff line
@@ -2046,7 +2046,8 @@ 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 = <GIC_SPI 193 IRQ_TYPE_EDGE_RISING>;
@@ -2056,7 +2057,8 @@ 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 = <GIC_SPI 197 IRQ_TYPE_EDGE_RISING>;
@@ -2293,7 +2295,8 @@ 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 = <GIC_SPI 93 IRQ_TYPE_EDGE_RISING>;

				clocks = <&xtal>, <&clkc CLKID_UART2>, <&xtal>;
@@ -2302,7 +2305,8 @@ 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 = <GIC_SPI 75 IRQ_TYPE_EDGE_RISING>;

				clocks = <&xtal>, <&clkc CLKID_UART1>, <&xtal>;
@@ -2311,7 +2315,8 @@ 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 = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;

				clocks = <&xtal>, <&clkc CLKID_UART0>, <&xtal>;