From mboxrd@z Thu Jan 1 00:00:00 1970 From: andrew.smirnov@gmail.com (Andrey Smirnov) Date: Thu, 13 Apr 2017 06:32:40 -0700 Subject: [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node In-Reply-To: <20170413133242.5068-1-andrew.smirnov@gmail.com> References: <20170413133242.5068-1-andrew.smirnov@gmail.com> Message-ID: <20170413133242.5068-7-andrew.smirnov@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add node for U38, a 74LV595PW serial-in shift register that acts as a GPIO expander on the board. Cc: yurovsky at gmail.com Cc: Sascha Hauer Cc: Fabio Estevam Cc: Rob Herring Cc: Mark Rutland Cc: Russell King Cc: devicetree at vger.kernel.org Cc: linux-kernel at vger.kernel.org Cc: linux-arm-kernel at lists.infradead.org Signed-off-by: Andrey Smirnov --- 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 at 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