Hi Frank,
Where exactly do I need to put this code in the device tree?
I tried adding this code in am33xx.dtsi, but my GPIO is not getting
triggered. It looks like this:
mac: ethernet@4a100000 {
compatible = "ti,am335x-cpsw","ti,cpsw";
ti,hwmods = "cpgmac0";
clocks = <&cpsw_125mhz_gclk>, <&cpsw_cpts_rft_clk>;
clock-names = "fck", "cpts";
cpdma_channels = <8>;
ale_entries = <1024>;
bd_ram_size = <0x2000>;
mac_control = <0x20>;
slaves = <2>;
active_slave = <0>;
cpts_clock_mult = <0x80000000>;
cpts_clock_shift = <29>;
reg = <0x4a100000 0x800
0x4a101200 0x100>;
#address-cells = <1>;
#size-cells = <1>;
/*
* c0_rx_thresh_pend
* c0_rx_pend
* c0_tx_pend
* c0_misc_pend
*/
interrupts = <40 41 42 43>;
ranges;
syscon = <&scm_conf>;
status = "disabled";
davinci_mdio: mdio@4a101000 {
compatible = "ti,cpsw-mdio","ti,davinci_mdio";
#address-cells = <1>;
#size-cells = <0>;
ti,hwmods = "davinci_mdio";
bus_freq = <1000000>;
reg = <0x4a101000 0x100>;
status = "disabled";
};
*&davinci_mdio { *
* pinctrl-names = "default", "sleep"; *
* pinctrl-0 = <&davinci_mdio_default>; *
* pinctrl-1 = <&davinci_mdio_sleep>; *
* status = "okay"; *
* reset-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>; *
* reset-delay-us = <100>; *
* ethphy0: @cpsw_emac0 {}; *
* };*
cpsw_emac0: slave@4a100200 {
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
};
cpsw_emac1: slave@4a100300 {
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
};
phy_sel: cpsw-phy-sel@44e10650 {
compatible = "ti,am3352-cpsw-phy-sel";
reg= <0x44e10650 0x4>;
reg-names = "gmii-sel";
};
};
Thank you,
Samer
On Tuesday, August 7, 2018 at 9:28:45 PM UTC-6, Frank Hunleth wrote:
>
> On Tue, Aug 7, 2018 at 8:29 PM <[email protected] <javascript:>> wrote:
> >
> > So I cut the trace for reset pin on Lan8710 and jumpered a wire to a
> gpio pin. And I added the reset gpio/reset-delay-us as shown in this link:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/net/mdio.txt
>
> >
> > I added following commands in am335x.dtsi on line 1057
> >
> > reset-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
> > reset-delay-us = <100>;
> >
>
> I had a similar problem. I believe that you need to specify the phy as
> a child node to trigger the reset GPIO logic in the mdio driver.
> Here's the relevant section of my device tree:
>
> &davinci_mdio {
> pinctrl-names = "default", "sleep";
> pinctrl-0 = <&davinci_mdio_default>;
> pinctrl-1 = <&davinci_mdio_sleep>;
> status = "okay";
>
> reset-gpios = <&gpio3 21 GPIO_ACTIVE_LOW>;
> reset-delay-us = <100>;
> ethphy0: @cpsw_emac0 {};
> };
>
> I've only done some quick tests, but it appears to be working.
>
> -Frank
>
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