Commit aac9aa37 authored by Florian Vaussard's avatar Florian Vaussard Committed by Tony Lindgren
Browse files

ARM: dts: omap: Add common file for SMSC9221 



Some devices (SMSC9217, SMSC9218 and SMSC9221 at least) have better
timings, allowing a higher transfer speed. Create a common file
with these timings.

Performance results with iperf:

- omap-gpmc-smsc911x.dtsi => 54.9 Mbps
- omap-gpmc-smsc9221.dtsi => 92.7 Mbps

Signed-off-by: default avatarFlorian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent dd4051bd

arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi

0 → 100644
+58 −0
Original line number Diff line number Diff line 
/*

 * Common file for GPMC connected smsc9221 on omaps

 *

 * Compared to smsc911x, smsc9221 (and others like smsc9217

 * or smsc 9218) has faster timings, leading to higher

 * bandwidth.

 *

 * Note that the board specifc DTS file needs to specify

 * ranges, pinctrl, reg, interrupt parent and interrupts.

 */



/ {

	vddvario: regulator-vddvario {

		  compatible = "regulator-fixed";

		  regulator-name = "vddvario";

		  regulator-always-on;

	};



	vdd33a: regulator-vdd33a {

		compatible = "regulator-fixed";

		regulator-name = "vdd33a";

		regulator-always-on;

	};

};



&gpmc {

	ethernet@gpmc {

		compatible = "smsc,lan9221","smsc,lan9115";

		bank-width = <2>;



		gpmc,mux-add-data;

		gpmc,cs-on-ns = <0>;

		gpmc,cs-rd-off-ns = <42>;

		gpmc,cs-wr-off-ns = <36>;

		gpmc,adv-on-ns = <6>;

		gpmc,adv-rd-off-ns = <12>;

		gpmc,adv-wr-off-ns = <12>;

		gpmc,oe-on-ns = <0>;

		gpmc,oe-off-ns = <42>;

		gpmc,we-on-ns = <0>;

		gpmc,we-off-ns = <36>;

		gpmc,rd-cycle-ns = <60>;

		gpmc,wr-cycle-ns = <54>;

		gpmc,access-ns = <36>;

		gpmc,page-burst-access-ns = <0>;

		gpmc,bus-turnaround-ns = <0>;

		gpmc,cycle2cycle-delay-ns = <0>;

		gpmc,wr-data-mux-bus-ns = <18>;

		gpmc,wr-access-ns = <42>;

		gpmc,cycle2cycle-samecsen;

		gpmc,cycle2cycle-diffcsen;



		vddvario-supply = <&vddvario>;

		vdd33a-supply = <&vdd33a>;

		reg-io-width = <4>;

		smsc,save-mac-address;

	};

};