On 2016/5/12 6:56, Jon Mason wrote:
> Add all of the UARTs present on NS2 and enable them in the SVK device
> tree file. Also, do some magic to make sure that uart3 is discovered as
> ttyS0 (as that is the console UART).
>
> Signed-off-by: Jon Mason <jonmason@xxxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/broadcom/ns2-svk.dts | 16 ++++++++++++++++
> arch/arm64/boot/dts/broadcom/ns2.dtsi | 30 ++++++++++++++++++++++++++++++
> 2 files changed, 46 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/broadcom/ns2-svk.dts b/arch/arm64/boot/dts/broadcom/ns2-svk.dts
> index 7cd3640..b062a44 100644
> --- a/arch/arm64/boot/dts/broadcom/ns2-svk.dts
> +++ b/arch/arm64/boot/dts/broadcom/ns2-svk.dts
> @@ -40,10 +40,14 @@
>
> aliases {
> serial0 = &uart3;
> + serial1 = &uart0;
> + serial2 = &uart1;
> + serial3 = &uart2;
> };
>
> chosen {
> stdout-path = "serial0:115200n8";
> + bootargs = "earlycon=uart8250,mmio32,0x66130000";
Hi Jon,
I submit a patch[1], with it, we can use earlycon without option to enable early console
for "snps,dw-apb-uart", could you help me to test it, thanks.
BRs,
Kefeng
[1] https://lkml.org/lkml/2016/5/11/34
> };
>
> memory {
> @@ -68,6 +72,18 @@
> status = "ok";
> };
>
> +&uart0 {
> + status = "ok";
> +};
> +
> +&uart1 {
> + status = "ok";
> +};
> +
> +&uart2 {
> + status = "ok";
> +};
> +
> &uart3 {
> status = "ok";
> };
> diff --git a/arch/arm64/boot/dts/broadcom/ns2.dtsi b/arch/arm64/boot/dts/broadcom/ns2.dtsi
> index 788ed8f..c77a9e8 100644
> --- a/arch/arm64/boot/dts/broadcom/ns2.dtsi
> +++ b/arch/arm64/boot/dts/broadcom/ns2.dtsi
> @@ -357,6 +357,36 @@
> status = "disabled";
> };
>
> + uart0: serial@66100000 {
> + compatible = "snps,dw-apb-uart";
> + reg = <0x66100000 0x100>;
> + interrupts = <GIC_SPI 390 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&iprocslow>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + status = "disabled";
> + };
> +
> + uart1: serial@66110000 {
> + compatible = "snps,dw-apb-uart";
> + reg = <0x66110000 0x100>;
> + interrupts = <GIC_SPI 391 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&iprocslow>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + status = "disabled";
> + };
> +
> + uart2: serial@66120000 {
> + compatible = "snps,dw-apb-uart";
> + reg = <0x66120000 0x100>;
> + interrupts = <GIC_SPI 392 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&iprocslow>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + status = "disabled";
> + };
> +
> uart3: serial@66130000 {
> compatible = "snps,dw-apb-uart";
> reg = <0x66130000 0x100>;
>
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