ARM: dts: vf610-bk4: Provide support for reading ID code from MVB device

The procedure to read this ID value is as follows:

rmmod spi_fsl_dspi
insmod spi-gpio.ko

echo 504 > /sys/class/gpio/export
cat /sys/class/gpio/gpio504/value
...
echo 511 > /sys/class/gpio/export
cat /sys/class/gpio/gpio511/value

rmmod spi-gpio.ko
insmod spi_fsl_dspi

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/vf610-bk4.dts b/arch/arm/boot/dts/vf610-bk4.dts
index 689c893..fe496f2 100644 (file)
--- a/arch/arm/boot/dts/vf610-bk4.dts
+++ b/arch/arm/boot/dts/vf610-bk4.dts
@@ -60,6 +60,29 @@
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
        };
+
+       spi-gpio {
+               compatible = "spi-gpio";
+               pinctrl-0 = <&pinctrl_gpio_spi>;
+               pinctrl-names = "default";
+               #address-cells = <1>;
+               #size-cells = <0>;
+               /* PTD12 ->RPIO[91] */
+               sck-gpios  = <&gpio2 27 GPIO_ACTIVE_LOW>;
+               /* PTD10 ->RPIO[89] */
+               miso-gpios = <&gpio2 25 GPIO_ACTIVE_HIGH>;
+               num-chipselects = <0>;
+
+               gpio@0 {
+                       compatible = "pisosr-gpio";
+                       reg = <0>;
+                       gpio-controller;
+                       #gpio-cells = <2>;
+                       /* PTB18 -> RGPIO[40] */
+                       load-gpios  = <&gpio1 8 GPIO_ACTIVE_LOW>;
+                       spi-max-frequency = <100000>;
+               };
+       };
 };
 
 &adc0 {
@@ -431,6 +454,14 @@
                >;
        };
 
+       pinctrl_gpio_spi: pinctrl-gpio-spi {
+               fsl,pins = <
+                       VF610_PAD_PTB18__GPIO_40        0x1183
+                       VF610_PAD_PTD10__GPIO_89        0x1183
+                       VF610_PAD_PTD12__GPIO_91        0x1183
+               >;
+       };
+
        pinctrl_i2c2: i2c2grp {
                fsl,pins = <
                        VF610_PAD_PTA22__I2C2_SCL               0x34df