[PATCH v2 2/4] ARM: dts: r8a7790: lager: use demuxer for IIC1/I2C1

[Simon Horman]

Make it possible to select which I2C1 IP core you want to run on the
EXIO-A connector.

This is based on reference work for the I2C0 core of the lager by Wolfram Sang.

Cc: Wolfram Sang 
Signed-off-by: Simon Horman 
---
 arch/arm/boot/dts/r8a7790-lager.dts | 26 --
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7790-lager.dts 
b/arch/arm/boot/dts/r8a7790-lager.dts
index 71d62ca282ea..20abb1470f91 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -51,6 +51,7 @@
serial0 = &scif0;
serial1 = &scifa1;
i2c8 = "i2cexio0";
+   i2c9 = "i2cexio1";
};
 
chosen {
@@ -270,6 +271,18 @@
#address-cells = <1>;
#size-cells = <0>;
};
+
+   /*
+* IIC1/I2C1 is routed to EXIO connector A, pins 78 (SCL) + 80 (SDA).
+* For further notes see i2cexio0.
+*/
+   i2cexio1: i2c-9 {
+   compatible = "i2c-demux-pinctrl";
+   i2c-parent = <&iic1>, <&i2c1>;
+   i2c-bus-name = "i2c-exio1";
+   #address-cells = <1>;
+   #size-cells = <0>;
+   };
 };
 
 &du {
@@ -392,6 +405,11 @@
function = "iic0";
};
 
+   i2c1_pins: i2c1 {
+   groups = "i2c1";
+   function = "i2c1";
+   };
+
iic1_pins: iic1 {
groups = "iic1";
function = "iic1";
@@ -588,10 +606,14 @@
pinctrl-names = "i2c-exio0";
 };
 
+&i2c1  {
+   pinctrl-0 = <&i2c1_pins>;
+   pinctrl-names = "i2c-exio1";
+};
+
 &iic1  {
-   status = "okay";
pinctrl-0 = <&iic1_pins>;
-   pinctrl-names = "default";
+   pinctrl-names = "i2c-exio1";
 };
 
 &iic2  {
-- 
2.1.4

Re: [PATCH v2 2/4] ARM: dts: r8a7790: lager: use demuxer for IIC1/I2C1

[Wolfram Sang]

On Wed, Jun 08, 2016 at 04:14:24PM +0900, Simon Horman wrote:
> Make it possible to select which I2C1 IP core you want to run on the
> EXIO-A connector.
> 
> This is based on reference work for the I2C0 core of the lager by Wolfram 
> Sang.
> 
> Cc: Wolfram Sang 
> Signed-off-by: Simon Horman 

Given the PFC problem gets solved, why can't you switch to GP1_16 and
GP1_17 for those?



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Re: [PATCH v2 2/4] ARM: dts: r8a7790: lager: use demuxer for IIC1/I2C1

[Simon Horman]

On Mon, Jun 13, 2016 at 04:33:04PM +0200, Wolfram Sang wrote:
> On Wed, Jun 08, 2016 at 04:14:24PM +0900, Simon Horman wrote:
> > Make it possible to select which I2C1 IP core you want to run on the
> > EXIO-A connector.
> > 
> > This is based on reference work for the I2C0 core of the lager by Wolfram 
> > Sang.
> > 
> > Cc: Wolfram Sang 
> > Signed-off-by: Simon Horman 
> 
> Given the PFC problem gets solved, why can't you switch to GP1_16 and
> GP1_17 for those?

Thanks, I missed that. I will see about making it so.