The SMSC9112 ethernet controller is connected to chip select 2
on the EBI2 bus on the APQ8060 Dragonboard. We set this up by
activating EBI2, creating a chipselect entry as a subnode, and then
putting the ethernet controller in a subnode of the chipselect.
After the chipselect is configured, the SMSC device will be
instantiated.
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v4->v5:
- Rename "ebi2@" to "external-bus@"
- Drop double comment.
- Drop double "only" in comment.
- Can we apply this now?
ChangeLog v3->v4:
- Rebase on kernel v4.9-rc1
- Bindings and driver are merged so should be clear to apply.
ChangeLog v2->v3:
- Name chipselected device to ethernet-ebi2@2,0
- Update to the latest (v5) version of the bindings and what
the EBI2 driver expects.
- The SMSC911x bindings were ACKed by Arnd Bergmann and are merged
to the netdev tree by David Miller.
- The EBI2 bindings were ACKed by Rob Herring and a pull request
for both bindings and driver is pending for ARM SoC.
- This should be safe to merge for v4.9.
ChangeLog v1->v2:
- Use the new bindings with the first address cell indicating
the chipselect
- Use offset zero into the range in the EBI2 node (the range
defines the base address of the chipselect)
- Move all the XMEM setup to arrays in the EBI2 node
---
arch/arm/boot/dts/qcom-apq8060-dragonboard.dts | 119 +++++++++++++++++++++++++
1 file changed, 119 insertions(+)
diff --git a/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts b/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts
index 6c0038398ef2..4b8872cc8bf9 100644
--- a/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts
+++ b/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts
@@ -51,6 +51,29 @@
regulator-boot-on;
};
+ /* GPIO controlled ethernet power regulator */
+ dragon_veth: xc622a331mrg {
+ compatible = "regulator-fixed";
+ regulator-name = "XC6222A331MR-G";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ vin-supply = <&vph>;
+ gpio = <&pm8058_gpio 40 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ pinctrl-names = "default";
+ pinctrl-0 = <&dragon_veth_gpios>;
+ regulator-always-on;
+ };
+
+ /* VDDvario fixed regulator */
+ dragon_vario: nds332p {
+ compatible = "regulator-fixed";
+ regulator-name = "NDS332P";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ vin-supply = <&pm8058_s3>;
+ };
+
/* This is a levelshifter for SDCC5 */
dragon_vio_txb: txb0104rgyr {
compatible = "regulator-fixed";
@@ -167,6 +190,36 @@
bias-pull-up;
};
};
+
+ dragon_ebi2_pins: ebi2 {
+ /*
+ * Pins used by EBI2 on the Dragonboard, actually only
+ * CS2 is used by a real peripheral. CS0 is just
+ * routed to a test point.
+ */
+ mux0 {
+ pins =
+ /* "gpio39", CS1A_N this is not good to mux */
+ "gpio40", /* CS2A_N */
+ "gpio134"; /* CS0_N testpoint TP29 */
+ function = "ebi2cs";
+ };
+ mux1 {
+ pins =
+ /* EBI2_ADDR_7 downto EBI2_ADDR_0 address bus */
+ "gpio123", "gpio124", "gpio125", "gpio126",
+ "gpio127", "gpio128", "gpio129", "gpio130",
+ /* EBI2_DATA_15 downto EBI2_DATA_0 data bus */
+ "gpio135", "gpio136", "gpio137", "gpio138",
+ "gpio139", "gpio140", "gpio141", "gpio142",
+ "gpio143", "gpio144", "gpio145", "gpio146",
+ "gpio147", "gpio148", "gpio149", "gpio150",
+ "gpio151", /* EBI2_OE_N */
+ "gpio153", /* EBI2_ADV */
+ "gpio157"; /* EBI2_WE_N */
+ function = "ebi2";
+ };
+ };
};
qcom,ssbi@500000 {
@@ -201,6 +254,15 @@
};
gpio@150 {
+ dragon_ethernet_gpios: ethernet-gpios {
+ pinconf {
+ pins = "gpio7";
+ function = "normal";
+ input-enable;
+ bias-disable;
+ power-source = <PM8058_GPIO_S3>;
+ };
+ };
dragon_bmp085_gpios: bmp085-gpios {
pinconf {
pins = "gpio16";
@@ -238,6 +300,14 @@
power-source = <PM8058_GPIO_S3>;
};
};
+ dragon_veth_gpios: veth-gpios {
+ pinconf {
+ pins = "gpio40";
+ function = "normal";
+ bias-disable;
+ drive-push-pull;
+ };
+ };
};
led@48 {
@@ -322,6 +392,55 @@
};
};
+ external-bus@1a100000 {
+ /* The EBI2 will instantiate first, then populate its children */
+ status = "ok";
+ pinctrl-names = "default";
+ pinctrl-0 = <&dragon_ebi2_pins>;
+
+ /*
+ * An on-board SMSC LAN9221 chip for "debug ethernet",
+ * which is actually just an ordinary ethernet on the
+ * EBI2. This has a 25MHz chrystal next to it, so no
+ * clocking is needed.
+ */
+ ethernet-ebi2@2,0 {
+ compatible = "smsc,lan9221", "smsc,lan9115";
+ reg = <2 0x0 0x100>;
+ /*
+ * GPIO7 has interrupt 198 on the PM8058
+ * The second interrupt is the PME interrupt
+ * for network wakeup, connected to the TLMM.
+ */
+ interrupts-extended = <&pmicintc 198 IRQ_TYPE_EDGE_FALLING>,
+ <&tlmm 29 IRQ_TYPE_EDGE_RISING>;
+ reset-gpios = <&tlmm 30 GPIO_ACTIVE_LOW>;
+ vdd33a-supply = <&dragon_veth>;
+ vddvario-supply = <&dragon_vario>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&dragon_ethernet_gpios>;
+ phy-mode = "mii";
+ reg-io-width = <2>;
+ smsc,force-external-phy;
+ /* IRQ on edge falling = active low */
+ smsc,irq-active-low;
+ smsc,irq-push-pull;
+
+ /*
+ * SLOW chipselect config
+ * Delay 9 cycles (140ns@64MHz) between SMSC
+ * LAN9221 Ethernet controller reads and writes
+ * on CS2.
+ */
+ qcom,xmem-recovery-cycles = <0>;
+ qcom,xmem-write-hold-cycles = <3>;
+ qcom,xmem-write-delta-cycles = <31>;
+ qcom,xmem-read-delta-cycles = <28>;
+ qcom,xmem-write-wait-cycles = <9>;
+ qcom,xmem-read-wait-cycles = <9>;
+ };
+ };
+
rpm@104000 {
/*
* Set up of the PMIC RPM regulators for this board
--
2.7.4
--
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