Re: [PATCH v5 2/4] Documentation: Bindings: Add STM32 DWMAC glue

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 3/21/2016 11:45 AM, Alexandre Torgue wrote:
Hi,

2016-03-18 17:00 GMT+01:00 Chen-Yu Tsai <wens@xxxxxxxx>:
Hi,

On Fri, Mar 18, 2016 at 11:37 PM, Alexandre TORGUE
<alexandre.torgue@xxxxxxxxx> wrote:
Signed-off-by: Alexandre TORGUE <alexandre.torgue@xxxxxxxxx>

diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.txt b/Documentation/devicetree/bindings/net/stm32-dwmac.txt
new file mode 100644
index 0000000..ada2aa4
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/stm32-dwmac.txt
@@ -0,0 +1,32 @@
+STMicroelectronics STM32 / MCU DWMAC glue layer controller
+
+This file documents platform glue layer for stmmac.
+Please see stmmac.txt for the other unchanged properties.
+
+The device node has following properties.
+
+Required properties:
+- compatible:  Should be "st,stm32-dwmac" to select glue, and
+              "snps,dwmac-3.50a" to select IP vesrion.

Almost all the synp gmac chips have the HW capability register that is
used for setting all the parameters at probe time.
This will override fields passed from DT. In theory, it is not
necessary to pass: "snps,dwmac-3.50a" from device tree at least there
is either no HW cap reg or the glue has some w/a for a specific chip
revision.
To be honest, I like to see the "snps,dwmac-3.50a" as compatibility
to also have a better readability (that's my personal view ;-) ).

Peppe


If you need have sort of hardware glue, then it is not compatible.


We could have the case where the glue is set by a bootloader.
In this case, we will select IP version in compatible and we will use
generic dwmac glue to probe stmmac driver.

Regards

Alex.

ChenYu

+- clocks: Must contain a phandle for each entry in clock-names.
+- clock-names: Should be "stmmaceth" for the host clock.
+              Should be "tx-clk" for the MAC TX clock.
+              Should be "rx-clk" for the MAC RX clock.
+- st,syscon : Should be phandle/offset pair. The phandle to the syscon node which
+             encompases the glue register, and the offset of the control register.
+Example:
+
+               ethernet0: dwmac@40028000 {
+                       compatible = "st,stm32-dwmac", "snps,dwmac-3.50a";
+                       status = "disabled";
+                       reg = <0x40028000 0x8000>;
+                       reg-names = "stmmaceth";
+                       interrupts = <0 61 0>, <0 62 0>;
+                       interrupt-names = "macirq", "eth_wake_irq";
+                       clock-names = "stmmaceth", "tx-clk", "rx-clk";
+                       clocks = <&rcc 0 25>, <&rcc 0 26>, <&rcc 0 27>;
+                       st,syscon = <&syscfg 0x4>;
+                       snps,pbl = <8>;
+                       snps,mixed-burst;
+                       dma-ranges;
+               };
--
1.9.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel



--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux