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authorGiuseppe Lippolis <giu.lippolis@gmail.com>2016-12-19 18:45:52 +0100
committerJohn Crispin <john@phrozen.org>2016-12-20 09:35:37 +0100
commit96a7ee3c80dec5cd86a25f6c72852928370e57b4 (patch)
tree46bd4110519c26729b7a3732e4cd0570afe223d0 /target
parentb5222924059f5146007a02e33d317f2c04d7dd0b (diff)
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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>
Diffstat (limited to 'target')
-rw-r--r--target/linux/generic/patches-4.4/105-add-linux-spidev-compatible.patch15
-rw-r--r--target/linux/ramips/dts/DWR-512-B.dts13
2 files changed, 28 insertions, 0 deletions
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 0000000..e3f750a
--- /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 ab3c02a..29e8eaf 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 {