Messages in this thread Patch in this message | | | From | Andrey Smirnov <> | Subject | [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node | Date | Thu, 13 Apr 2017 06:32:40 -0700 |
| |
Add node for U38, a 74LV595PW serial-in shift register that acts as a GPIO expander on the board.
Cc: yurovsky@gmail.com Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> --- arch/arm/boot/dts/imx7d-sdb.dts | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts index 5be01a1..e0ff276 100644 --- a/arch/arm/boot/dts/imx7d-sdb.dts +++ b/arch/arm/boot/dts/imx7d-sdb.dts @@ -52,6 +52,30 @@ reg = <0x80000000 0x80000000>; }; + spi4 { + compatible = "spi-gpio"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_spi1>; + status = "okay"; + gpio-sck = <&gpio1 13 0>; + gpio-mosi = <&gpio1 9 0>; + cs-gpios = <&gpio1 12 0>; + num-chipselects = <1>; + #address-cells = <1>; + #size-cells = <0>; + + gpio_spi: gpio_spi@0 { + compatible = "fairchild,74hc595"; + gpio-controller; + #gpio-cells = <2>; + reg = <0>; + registers-number = <1>; + /* Enable PERI_3V3, SENSOR_RST_B and HDMI_RST*/ + registers-default = /bits/ 8 <0x74>; + spi-max-frequency = <100000>; + }; + }; + regulators { compatible = "simple-bus"; #address-cells = <1>; @@ -642,5 +666,13 @@ fsl,pins = < MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x110b0 >; + + pinctrl_spi1: spi1grp { + fsl,pins = < + MX7D_PAD_GPIO1_IO09__GPIO1_IO9 0x59 + MX7D_PAD_GPIO1_IO12__GPIO1_IO12 0x59 + MX7D_PAD_GPIO1_IO13__GPIO1_IO13 0x59 + >; + }; }; }; -- 2.9.3
| |