From aac9aa37e55bdf1f4e9e67402e5027907e221718 Mon Sep 17 00:00:00 2001 From: Florian Vaussard Date: Fri, 7 Mar 2014 20:22:16 +0100 Subject: [PATCH] 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: Florian Vaussard Signed-off-by: Tony Lindgren --- arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi | 58 +++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi diff --git a/arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi b/arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi new file mode 100644 index 000000000000..73e272fadc20 --- /dev/null +++ b/arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi @@ -0,0 +1,58 @@ +/* + * 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; + }; +}; -- 2.20.1