diff options
| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2013-01-25 09:39:35 +0100 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2013-01-29 08:38:59 +0100 |
| commit | 7ecc70a98ce387196819a2fa98e97eac07592230 (patch) | |
| tree | 66de969bc0d19569556ef878ffc151fe02dee5ee | |
| parent | ARM: mxs: dt: Add Crystalfontz CFA-10037 device tree support (diff) | |
| download | linux-7ecc70a98ce387196819a2fa98e97eac07592230.tar.xz linux-7ecc70a98ce387196819a2fa98e97eac07592230.zip | |
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>
| -rw-r--r-- | arch/arm/boot/dts/imx28-cfa10049.dts | 78 |
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>; + }; + }; }; |