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Message-ID: <a33f0c73-df49-5a22-14b3-0059f7d6b827@microchip.com>
Date: Fri, 4 Mar 2022 08:30:19 +0000
From: <Claudiu.Beznea@...rochip.com>
To: <michael@...le.cc>, <Kavyasree.Kotagiri@...rochip.com>,
<Nicolas.Ferre@...rochip.com>
CC: <arnd@...db.de>, <olof@...om.net>, <soc@...nel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<robh+dt@...nel.org>, <krzysztof.kozlowski@...onical.com>,
<alexandre.belloni@...tlin.com>
Subject: Re: [PATCH v1 3/6] ARM: dts: lan966x: add all flexcom usart nodes
On 03.03.2022 18:03, Michael Walle wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> Add all the usart nodes for the flexcom block. There was already
> an usart node for the flexcom3 block. But it missed the DMA
> channels.
And it would be good to go though a different patch.
> Although the DMA channels are specified, DMA is not
> enabled by default because break detection doesn't work with DMA.
>
> Keep the nodes disabled by default.
>
> Signed-off-by: Michael Walle <michael@...le.cc>
> ---
> arch/arm/boot/dts/lan966x.dtsi | 55 ++++++++++++++++++++++++++++++++++
> 1 file changed, 55 insertions(+)
>
> diff --git a/arch/arm/boot/dts/lan966x.dtsi b/arch/arm/boot/dts/lan966x.dtsi
> index a7d46a2ca058..bea69b6d2749 100644
> --- a/arch/arm/boot/dts/lan966x.dtsi
> +++ b/arch/arm/boot/dts/lan966x.dtsi
> @@ -92,6 +92,19 @@ flx0: flexcom@...40000 {
> #size-cells = <1>;
> ranges = <0x0 0xe0040000 0x800>;
> status = "disabled";
> +
> + usart0: serial@200 {
> + compatible = "atmel,at91sam9260-usart";
Are the usart blocks in lan966x 1:1 compatible with what is is sam9260? In
case not it may worth to have a new compatible here, for lan966x, such that
when new features will be implemented in usart driver for lan966x the old
DT (this one) will work with the new kernel implementation. Same for the
rest of the nodes added in this series.
> + reg = <0x200 0x200>;
> + interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
> + dmas = <&dma0 AT91_XDMAC_DT_PERID(3)>,
> + <&dma0 AT91_XDMAC_DT_PERID(2)>;
Keep dma entries aligned.
> + dma-names = "tx", "rx";
> + clocks = <&nic_clk>;
> + clock-names = "usart";
> + atmel,fifo-size = <32>;
> + status = "disabled";
> + };
> };
>
> flx1: flexcom@...44000 {
> @@ -102,6 +115,19 @@ flx1: flexcom@...44000 {
> #size-cells = <1>;
> ranges = <0x0 0xe0044000 0x800>;
> status = "disabled";
> +
> + usart1: serial@200 {
> + compatible = "atmel,at91sam9260-usart";
> + reg = <0x200 0x200>;
> + interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
> + dmas = <&dma0 AT91_XDMAC_DT_PERID(5)>,
> + <&dma0 AT91_XDMAC_DT_PERID(4)>;
> + dma-names = "tx", "rx";
> + clocks = <&nic_clk>;
> + clock-names = "usart";
> + atmel,fifo-size = <32>;
> + status = "disabled";
> + };
> };
>
> trng: rng@...48000 {
> @@ -129,6 +155,19 @@ flx2: flexcom@...60000 {
> #size-cells = <1>;
> ranges = <0x0 0xe0060000 0x800>;
> status = "disabled";
> +
> + usart2: serial@200 {
> + compatible = "atmel,at91sam9260-usart";
> + reg = <0x200 0x200>;
> + interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
> + dmas = <&dma0 AT91_XDMAC_DT_PERID(7)>,
> + <&dma0 AT91_XDMAC_DT_PERID(6)>;
> + dma-names = "tx", "rx";
> + clocks = <&nic_clk>;
> + clock-names = "usart";
> + atmel,fifo-size = <32>;
> + status = "disabled";
> + };
> };
>
> flx3: flexcom@...64000 {
> @@ -144,6 +183,9 @@ usart3: serial@200 {
> compatible = "atmel,at91sam9260-usart";
> reg = <0x200 0x200>;
> interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>;
> + dmas = <&dma0 AT91_XDMAC_DT_PERID(9)>,
> + <&dma0 AT91_XDMAC_DT_PERID(8)>;
> + dma-names = "tx", "rx";
> clocks = <&nic_clk>;
> clock-names = "usart";
> atmel,fifo-size = <32>;
> @@ -178,6 +220,19 @@ flx4: flexcom@...70000 {
> #size-cells = <1>;
> ranges = <0x0 0xe0070000 0x800>;
> status = "disabled";
> +
> + usart4: serial@200 {
> + compatible = "atmel,at91sam9260-usart";
> + reg = <0x200 0x200>;
> + interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>;
> + dmas = <&dma0 AT91_XDMAC_DT_PERID(11)>,
> + <&dma0 AT91_XDMAC_DT_PERID(10)>;
> + dma-names = "tx", "rx";
> + clocks = <&nic_clk>;
> + clock-names = "usart";
> + atmel,fifo-size = <32>;
> + status = "disabled";
> + };
> };
>
> timer0: timer@...8c000 {
> --
> 2.30.2
>
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