From 96a7ee3c80dec5cd86a25f6c72852928370e57b4 Mon Sep 17 00:00:00 2001
From: Giuseppe Lippolis <giu.lippolis@gmail.com>
Date: Mon, 19 Dec 2016 18:45:52 +0100
Subject: [PATCH] ramips: adding registration for si3210
The si3210 is a SLIC device providing a complete analog telephone
interface and therefore frequently used in soho router.
The si3210 have a native spi interface to be controlled by the CPU
but currently there is no dedicated driver in lede.
Adding a registration for this device in spidev allow to control the
device in user space.
This way of patching is also in line with the rationale of the spidev
driver, see: http://marc.info/?t=148145791900001&r=1&w=2
The si3210 has been also added in the DWR-512 DT to properly describe
the HW.
Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>
---
.../105-add-linux-spidev-compatible.patch | 15 +++++++++++++++
target/linux/ramips/dts/DWR-512-B.dts | 13 +++++++++++++
2 files changed, 28 insertions(+)
create mode 100644 target/linux/generic/patches-4.4/105-add-linux-spidev-compatible.patch
diff --git a/target/linux/generic/patches-4.4/105-add-linux-spidev-compatible.patch b/target/linux/generic/patches-4.4/105-add-linux-spidev-compatible.patch
new file mode 100644
index 0000000000..e3f750a6e1
--- /dev/null
+++ b/target/linux/generic/patches-4.4/105-add-linux-spidev-compatible.patch
@@ -0,0 +1,15 @@
+Add the linux,spidev compatible in spidev
+Several device in ramips have this binding in the dts
+
+Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>
+---
+--- a/drivers/spi/spidev.c 2016-12-11 09:43:30.502270523 +0100
++++ b/drivers/spi/spidev.c 2016-12-11 09:45:54.688430012 +0100
+@@ -695,6 +695,7 @@ static struct class *spidev_class;
+ static const struct of_device_id spidev_dt_ids[] = {
+ { .compatible = "rohm,dh2228fv" },
+ { .compatible = "lineartechnology,ltc2488" },
++ { .compatible = "siliconlabs,si3210" },
+ {},
+ };
+ MODULE_DEVICE_TABLE(of, spidev_dt_ids);
diff --git a/target/linux/ramips/dts/DWR-512-B.dts b/target/linux/ramips/dts/DWR-512-B.dts
index ab3c02aeb3..29e8eaf410 100644
--- a/target/linux/ramips/dts/DWR-512-B.dts
+++ b/target/linux/ramips/dts/DWR-512-B.dts
@@ -104,6 +104,19 @@
};
};
+&spi1 {
+ status = "okay";
+
+ spidev@1 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "siliconlabs,si3210";
+
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ };
+};
+
&pinctrl {
state_default: pinctrl0 {
gpio {
--
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