This patch adds device tree entries for I2C hardware to the TI-NSPIRE
platforms that have it.
It also adds support for the touchpad that communicates over the I2C
bus.
Signed-off-by: Daniel Tang <dt.ta...@gmail.com>
---
arch/arm/boot/dts/nspire-cx.dts | 13 +++++++++++++
arch/arm/boot/dts/nspire-tp.dts | 14 ++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/arch/arm/boot/dts/nspire-cx.dts b/arch/arm/boot/dts/nspire-cx.dts
index 08e0b81..e369e3b 100644
--- a/arch/arm/boot/dts/nspire-cx.dts
+++ b/arch/arm/boot/dts/nspire-cx.dts
@@ -104,9 +104,22 @@
#size-cells = <1>;
i2c@90050000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
compatible = "snps,designware-i2c";
reg = <0x90050000 0x1000>;
interrupts = <20>;
+
+ clocks = <&apb_pclk>;
+
+ i2c-sda-falling-time-ns = <810>;
+ i2c-scl-falling-time-ns = <2410>;
+
+ touchpad@20 {
+ compatible = "synaptics_i2c";
+ reg = <0x20>;
+ };
};
};
};
diff --git a/arch/arm/boot/dts/nspire-tp.dts b/arch/arm/boot/dts/nspire-tp.dts
index 621391c..49fb97a 100644
--- a/arch/arm/boot/dts/nspire-tp.dts
+++ b/arch/arm/boot/dts/nspire-tp.dts
@@ -41,4 +41,18 @@
/ {
model = "TI-NSPIRE Touchpad";
compatible = "ti,nspire-tp";
+
+ i2c@gpio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ compatible = "i2c-gpio";
+ gpios = < &gpio 3 0 /* sda */
+ &gpio 1 0 /* scl */ >;
+
+ touchpad@20 {
+ compatible = "synaptics_i2c";
+ reg = <0x20>;
+ };
+ };
};
--
2.2.1
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