Heiko,
在 2016年01月31日 19:06, Heiko Stuebner 写道:
Hi Caesar,
Am Donnerstag, 28. Januar 2016, 16:43:38 schrieb Caesar Wang:
[...]
memory {
@@ -485,6 +486,23 @@
status = "disabled";
};
+ spi: spi@20074000 {
+ compatible = "rockchip,rockchip-spi";
+ reg = <0x20074000 0x1000>;
+ interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi_txd &spi_rxd &spi_clk &spi_cs0 &spi_cs1>;
Do we really want to enable both chip-selects by default?
On the rk3288 Lin Huang wrote:
* It's assumed that most users of the SPI ports are using chip select
0. Thus the default pinctrl for the ports enables chip select 0
(but not chip select 1 on ports that have it). If a board wants to
use chip select 1 or wants a GPIO chip select the board should
override the pinctrl (just like boards can override UART pinctrl if
they have hardware flow control).
Do we expect again mostly a use of cs0 or will in the major cases both chip-
selects be needed?
Sound resonable.
In general, every cs and spi devices should be the one match one.
That should be resonable if we want to use chip select 1 or want a GPIO chip select the board should
override the pinctrl.
+ num-cs = <2>;
+ clocks =<&cru PCLK_SPI>, <&cru SCLK_SPI>;
+ clock-names = "apb-pclk","spi_pclk";
+ dmas = <&pdma 8>, <&pdma 9>;
+ #dma-cells = <2>;
What do you need #dma-cells for? This is not a dma-controller :-)
Fixed.
+ dma-names = "tx", "rx";
+ status = "disabled";
+ };
Also I'd suggest an ordering like:
+ spi: spi@20074000 {
+ compatible = "rockchip,rockchip-spi";
+ reg = <0x20074000 0x1000>;
+ interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
+ clocks =<&cru PCLK_SPI>, <&cru SCLK_SPI>;
+ clock-names = "apb-pclk","spi_pclk";
+ dmas = <&pdma 8>, <&pdma 9>;
+ dma-names = "tx", "rx";
+ num-cs = <2>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi_txd &spi_rxd &spi_clk &spi_cs0 &spi_cs1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";
+ };
Okay, I will remove the cs1/num-cs in here.
Thanks.
-
Caesar
Heiko
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--
Thanks,
Caesar
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