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ramips: adding registration for si3210

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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>
This commit is contained in:
Giuseppe Lippolis 2016-12-19 18:45:52 +01:00 committed by John Crispin
parent b522292405
commit 96a7ee3c80
2 changed files with 28 additions and 0 deletions
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15
target/linux/generic/patches-4.4/105-add-linux-spidev-compatible.patch Normal file
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@ -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);

13
target/linux/ramips/dts/DWR-512-B.dts
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@ -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 {