diff options
| author | Florian Vaussard <florian.vaussard@epfl.ch> | 2014-03-07 20:22:16 +0100 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2014-03-12 10:18:16 -0700 |
| commit | aac9aa37e55bdf1f4e9e67402e5027907e221718 (patch) | |
| tree | 079a91b52974b97b06baf2f2cb9b1e743ce29806 | |
| parent | dd4051bd2daaeedfd1bff32ee2ee6f4107b2257a (diff) | |
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 <florian.vaussard@epfl.ch>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi | 58 |
1 files changed, 58 insertions, 0 deletions
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 00000000000..73e272fadc2 --- /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; + }; +}; |