diff options
| author | Lothar Waßmann <LW@KARO-electronics.de> | 2014-09-09 15:26:02 +0400 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@freescale.com> | 2014-09-16 06:27:18 +0400 |
| commit | d7dbe2c78f74f1d6514b2ea4fc3f4740f01f70c5 (patch) | |
| tree | c08eb85085cc41cddcf415bc5157e1d56eb6493a /arch/arm/boot/dts/imx28-tx28.dts | |
| parent | 4d6480ac8c063e270e5edb63b8cf721a6e01f1e6 (diff) | |
| download | linux-d7dbe2c78f74f1d6514b2ea4fc3f4740f01f70c5.tar.xz | |
ARM: dts: imx28-tx28: add spi-gpio as alternative for spi-mxs
The spi-mxs driver does not allow full duplex SPI transfers. The
spi-gpio driver may be used as an alternative if this is required.
Make the choice between those drivers easier for the end user by
providing settings for both drivers.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Diffstat (limited to 'arch/arm/boot/dts/imx28-tx28.dts')
| -rw-r--r-- | arch/arm/boot/dts/imx28-tx28.dts | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/imx28-tx28.dts b/arch/arm/boot/dts/imx28-tx28.dts index cfe6b3148dcc..81d4eb4220a5 100644 --- a/arch/arm/boot/dts/imx28-tx28.dts +++ b/arch/arm/boot/dts/imx28-tx28.dts @@ -27,6 +27,8 @@ lcdif = &lcdif; lcdif_23bit_pins = &tx28_lcdif_23bit_pins; lcdif_24bit_pins = &lcdif_24bit_pins_a; + spi_gpio = &spi_gpio; + spi_mxs = &ssp3; stk5led = &user_led; usbotg = &usb0; }; @@ -203,6 +205,44 @@ col-scan-delay-us = <5000>; linux,no-autorepeat; }; + + spi_gpio: spi-gpio { + compatible = "spi-gpio"; + #address-cells = <1>; + #size-cells = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&tx28_spi_gpio_pins>; + + gpio-sck = <&gpio2 24 GPIO_ACTIVE_HIGH>; + gpio-mosi = <&gpio2 25 GPIO_ACTIVE_HIGH>; + gpio-miso = <&gpio2 26 GPIO_ACTIVE_HIGH>; + num-chipselects = <3>; + cs-gpios = < + &gpio2 27 GPIO_ACTIVE_LOW + &gpio3 8 GPIO_ACTIVE_LOW + &gpio3 9 GPIO_ACTIVE_LOW + >; + /* enable this and disable ssp3 below, if you need full duplex SPI transfer */ + status = "disabled"; + + spi@0 { + compatible = "spidev"; + reg = <0>; + spi-max-frequency = <57600000>; + }; + + spi@1 { + compatible = "spidev"; + reg = <1>; + spi-max-frequency = <57600000>; + }; + + spi@2 { + compatible = "spidev"; + reg = <2>; + spi-max-frequency = <57600000>; + }; + }; }; /* 2nd TX-Std UART - (A)UART1 */ @@ -558,6 +598,20 @@ fsl,pull-up = <MXS_PULL_DISABLE>; }; + tx28_spi_gpio_pins: spi-gpiogrp { + fsl,pinmux-ids = < + MX28_PAD_AUART2_RX__GPIO_3_8 + MX28_PAD_AUART2_TX__GPIO_3_9 + MX28_PAD_SSP3_SCK__GPIO_2_24 + MX28_PAD_SSP3_MOSI__GPIO_2_25 + MX28_PAD_SSP3_MISO__GPIO_2_26 + MX28_PAD_SSP3_SS0__GPIO_2_27 + >; + fsl,drive-strength = <MXS_DRIVE_8mA>; + fsl,voltage = <MXS_VOLTAGE_HIGH>; + fsl,pull-up = <MXS_PULL_DISABLE>; + }; + tx28_tsc2007_pins: tx28-tsc2007-pins { fsl,pinmux-ids = < MX28_PAD_SAIF0_MCLK__GPIO_3_20 /* TSC2007 IRQ */ |