[PATCH v2 3/7] sandbox: add i2c and spi libftdi1 bit-bang example
Antony Pavlov
antonynpavlov at gmail.com
Sun Jan 14 13:22:48 PST 2018
Make necessary changes in sandbox_defconfig:
enable gpio, spi, i2c and led stuff.
Usage:
barebox$ make sandbox_defconfig
barebox$ sed -i "s/# CONFIG_GPIO_LIBFTDI1.*$/CONFIG_GPIO_LIBFTDI1=y/" .config
# edit arch/sandbox/dts/sandbox.dts if necessary
barebox$ make
barebox$ sudo ./barebox -d arch/sandbox/dts/sandbox.dtb
Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
---
arch/sandbox/configs/sandbox_defconfig | 26 ++++++++++++++++-
arch/sandbox/dts/sandbox.dts | 52 ++++++++++++++++++++++++++++++++++
2 files changed, 77 insertions(+), 1 deletion(-)
diff --git a/arch/sandbox/configs/sandbox_defconfig b/arch/sandbox/configs/sandbox_defconfig
index dbaff12bfb..6b10adb8ef 100644
--- a/arch/sandbox/configs/sandbox_defconfig
+++ b/arch/sandbox/configs/sandbox_defconfig
@@ -53,6 +53,11 @@ CONFIG_CMD_CRC_CMP=y
CONFIG_CMD_MM=y
CONFIG_CMD_DETECT=y
CONFIG_CMD_FLASH=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_LED=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_LED_TRIGGER=y
CONFIG_CMD_2048=y
CONFIG_CMD_OF_NODE=y
CONFIG_CMD_OF_PROPERTY=y
@@ -66,10 +71,29 @@ CONFIG_NET_NETCONSOLE=y
CONFIG_OFDEVICE=y
CONFIG_OF_BAREBOX_DRIVERS=y
CONFIG_DRIVER_NET_TAP=y
-# CONFIG_SPI is not set
+CONFIG_DRIVER_SPI_GPIO=y
+CONFIG_I2C=y
+CONFIG_I2C_GPIO=y
+CONFIG_I2C_MUX=y
+CONFIG_I2C_MUX_PCA954x=y
+CONFIG_MTD=y
+CONFIG_MTD_M25P80=y
CONFIG_VIDEO=y
CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_LED_GPIO_OF=y
+CONFIG_LED_GPIO_RGB=y
+CONFIG_LED_GPIO_BICOLOR=y
+CONFIG_LED_TRIGGERS=y
+CONFIG_EEPROM_AT25=y
+CONFIG_EEPROM_AT24=y
+CONFIG_GPIO_74164=y
+CONFIG_GPIO_PCA953X=y
+CONFIG_GPIO_SX150X=y
# CONFIG_PINCTRL is not set
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_DS1307=y
CONFIG_FS_CRAMFS=y
CONFIG_FS_EXT4=y
CONFIG_FS_TFTP=y
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
index 2595aa13fa..69568f6d7a 100644
--- a/arch/sandbox/dts/sandbox.dts
+++ b/arch/sandbox/dts/sandbox.dts
@@ -1,7 +1,59 @@
/dts-v1/;
#include "skeleton.dtsi"
+#include <dt-bindings/gpio/gpio.h>
/ {
+ gpio0: gpio at 0 {
+ compatible = "barebox,libftdi1-gpio";
+ /* use ACBUS[7:0] */
+ gpio-controller;
+ #gpio-cells = <2>;
+ status = "okay";
+ };
+ spi0 {
+ compatible = "spi-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ gpio-sck = <&gpio0 0 GPIO_ACTIVE_HIGH>;
+ gpio-mosi = <&gpio0 1 GPIO_ACTIVE_HIGH>;
+ gpio-miso = <&gpio0 2 GPIO_ACTIVE_HIGH>;
+ cs-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
+
+ num-chipselects = <1>;
+
+ status = "disabled";
+
+ m25p128 at 0 {
+ compatible = "m25p128", "jedec,spi-nor";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ };
+ };
+
+ i2c0: i2c0 {
+ compatible = "i2c-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpios = <&gpio0 4 GPIO_ACTIVE_HIGH /* sda */
+ &gpio0 5 GPIO_ACTIVE_HIGH /* scl */
+ >;
+ i2c-gpio,scl-output-only;
+
+ status = "disabled";
+
+ eeprom: at24 at 50 {
+ compatible = "atmel,24c32";
+ reg = <0x50>;
+ };
+
+ rtc: ds1307 at 68 {
+ compatible = "dallas,ds1307";
+ reg = <0x68>;
+ };
+ };
};
--
2.15.1
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