From 96a7ee3c80dec5cd86a25f6c72852928370e57b4 Mon Sep 17 00:00:00 2001 From: Giuseppe Lippolis 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 --- .../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 +--- +--- 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 { -- 2.30.2