ARM: dts: cfa10049: Change the SPI3 bus to spi-gpio

The DAC found on the last chip select requires a word length of 12 bits,
which is not supported by the SSP controller of the iMX28. Use
bitbanging for that bus to support such a length.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 42 insertions, 36 deletions

diff --git a/arch/arm/boot/dts/imx28-cfa10049.dts b/arch/arm/boot/dts/imx28-cfa10049.dts
index 7890acc4161d..dd91244d139c 100644
--- a/arch/arm/boot/dts/imx28-cfa10049.dts
+++ b/arch/arm/boot/dts/imx28-cfa10049.dts
@@ -52,48 +52,17 @@
                                 spi3_pins_cfa10049: spi3-cfa10049@0 {
                                         reg = <0>;
                                         fsl,pinmux-ids = <
-                                                0x0181 /* MX28_PAD_GPMI_RDN__SSP3_SCK */
-                                                0x01c1 /* MX28_PAD_GPMI_RESETN__SSP3_CMD */
-                                                0x0111 /* MX28_PAD_GPMI_CE1N__SSP3_D3 */
-                                                0x01a2 /* MX28_PAD_GPMI_ALE__SSP3_D4 */
-                                                0x01b2 /* MX28_PAD_GPMI_CLE__SSP3_D5 */
+                                                0x0183 /* MX28_PAD_GPMI_RDN__GPIO_0_24 */
+                                                0x01c3 /* MX28_PAD_GPMI_RESETN__GPIO_0_28 */
+                                                0x0113 /* MX28_PAD_GPMI_CE1N__GPIO_0_17 */
+                                                0x01a3 /* MX28_PAD_GPMI_ALE__GPIO_0_26 */
+                                                0x01b3 /* MX28_PAD_GPMI_CLE__GPIO_0_27 */
                                         >;
                                         fsl,drive-strength = <1>;
                                         fsl,voltage = <1>;
                                         fsl,pull-up = <1>;
                                 };
                         };
-
-                        ssp3: ssp@80016000 {
-                                compatible = "fsl,imx28-spi";
-                                pinctrl-names = "default";
-                                pinctrl-0 = <&spi3_pins_cfa10049>;
-                                status = "okay";
-
-                                gpio5: gpio5@0 {
-                                        compatible = "fairchild,74hc595";
-                                        gpio-controller;
-                                        #gpio-cells = <2>;
-                                        reg = <0>;
-                                        registers-number = <2>;
-                                        spi-max-frequency = <100000>;
-                                };
-
-                                gpio6: gpio6@1 {
-                                        compatible = "fairchild,74hc595";
-                                        gpio-controller;
-                                        #gpio-cells = <2>;
-                                        reg = <1>;
-                                        registers-number = <4>;
-                                        spi-max-frequency = <100000>;
-                                };
-
-                                dac0: dh2228@2 {
-                                        compatible = "rohm,dh2228fv";
-                                        reg = <2>;
-                                        spi-max-frequency = <100000>;
-                                };
-                        };
                 };
 
                 apbx@80040000 {
@@ -177,4 +146,41 @@
                         status = "okay";
                 };
         };
+
+        spi3 {
+                compatible = "spi-gpio";
+                pinctrl-names = "default";
+                pinctrl-0 = <&spi3_pins_cfa10049>;
+                status = "okay";
+                gpio-sck = <&gpio0 24 0>;
+                gpio-mosi = <&gpio0 28 0>;
+                cs-gpios = <&gpio0 17 0 &gpio0 26 0 &gpio0 27 0>;
+                num-chipselects = <3>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                gpio5: gpio5@0 {
+                        compatible = "fairchild,74hc595";
+                        gpio-controller;
+                        #gpio-cells = <2>;
+                        reg = <0>;
+                        registers-number = <2>;
+                        spi-max-frequency = <100000>;
+                };
+
+                gpio6: gpio6@1 {
+                        compatible = "fairchild,74hc595";
+                        gpio-controller;
+                        #gpio-cells = <2>;
+                        reg = <1>;
+                        registers-number = <4>;
+                        spi-max-frequency = <100000>;
+                };
+
+                dac0: dh2228@2 {
+                        compatible = "rohm,dh2228fv";
+                        reg = <2>;
+                        spi-max-frequency = <100000>;
+                };
+        };
 };