On 12/22/2017 07:06 AM, sean.wang@xxxxxxxxxxxx wrote:
> From: Sean Wang <sean.wang@xxxxxxxxxxxx>
>
> On bpi-r2 board, totally there're four uarts which we usually called
> uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
> dedicated pin slot which is used to conolse log. uart[0-1] appear at the
> 40-pins connector and uart3 has no pinout, but just has test points (TP47
> for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
> pinctrl is being complemented for those devices.
>
> Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
> ---
> arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
> 1 file changed, 24 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> index 7bf5aa2..64bf5db 100644
> --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> @@ -409,6 +409,20 @@
> <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
> };
> };
> +
> + uart2_pins_a: uart@2 {
> + pins_dat {
> + pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
> + <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
> + };
> + };
> +
> + uart3_pins_a: uart@3 {
> + pins_dat {
> + pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
> + <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
> + };
> + };
> };
>
> &pwm {
> @@ -454,16 +468,24 @@
> &uart0 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart0_pins_a>;
> - status = "disabled";
> + status = "okay";
> };
>
> &uart1 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart1_pins_a>;
> - status = "disabled";
> + status = "okay";
> };
>
> &uart2 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart2_pins_a>;
> + status = "okay";
> +};
> +
> +&uart3 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart3_pins_a>;
> status = "okay";
> };
>
Why do we want to enable uart3 when there are only test points?
It is not very useful, or do I oversee something?
Regards,
Matthias
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