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@xxxxxxx>
---
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 0000000..73e272f
--- /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;
+ };
+};
--
1.8.1.2
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