Commit 2872af1a authored by Christian Taedcke's avatar Christian Taedcke Committed by Kumar Gala
Browse files

boards: efr32mg_sltb004a: Add support for sensor ccs811 



The on-board sensor has a enable pin that must be pulled
high in order to power the sensor.
Since no i2c sensor connected to ENV_I2C is supported by zephyr yet,
changed the pins of i2c1 to be connected to CCS811_I2C pins.

Signed-off-by: default avatarChristian Taedcke <christian.taedcke@lemonbeat.com>
parent 8ab0d153

boards/arm/efr32mg_sltb004a/CMakeLists.txt

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# Copyright (c) 2020 Christian Taedcke

# SPDX-License-Identifier: Apache-2.0



if(CONFIG_CCS811)

  zephyr_library()

  zephyr_library_sources(board.c)

  zephyr_library_include_directories(${PROJECT_SOURCE_DIR}/drivers)

endif()

boards/arm/efr32mg_sltb004a/board.c

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/*

 * Copyright (c) 2020 Christian Taedcke

 *

 * SPDX-License-Identifier: Apache-2.0

 */



#include <init.h>

#include "board.h"

#include <drivers/gpio.h>

#include <sys/printk.h>



static int efr32mg_sltb004a_init(struct device *dev)

{

	struct device *cur_dev;



	ARG_UNUSED(dev);



#ifdef CONFIG_CCS811

	/* Enable the CCS811 power */

	cur_dev = device_get_binding(CCS811_PWR_ENABLE_GPIO_NAME);

	if (!cur_dev) {

		printk("CCS811 power gpio port was not found!\n");

		return -ENODEV;

	}



	gpio_pin_configure(cur_dev, CCS811_PWR_ENABLE_GPIO_PIN, GPIO_OUTPUT);

	gpio_pin_set(cur_dev, CCS811_PWR_ENABLE_GPIO_PIN, 1);



#endif /* CONFIG_CCS811 */



	return 0;

}



/* needs to be done after GPIO driver init */

SYS_INIT(efr32mg_sltb004a_init, PRE_KERNEL_1, CONFIG_BOARD_INIT_PRIORITY);

boards/arm/efr32mg_sltb004a/board.h

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/*

 * Copyright (c) 2020 Christian Taedcke

 *

 * SPDX-License-Identifier: Apache-2.0

 */



#ifndef __INC_BOARD_H

#define __INC_BOARD_H



/* CCS811 specific pins */

#ifdef CONFIG_CCS811

#define CCS811_PWR_ENABLE_GPIO_NAME	"GPIO_F"

#define CCS811_PWR_ENABLE_GPIO_PIN	14

#endif /* CONFIG_CCS811 */



#endif /* __INC_BOARD_H */

boards/arm/efr32mg_sltb004a/doc/index.rst

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@@ -120,9 +120,9 @@ in the board's and microcontroller's datasheets and manuals. 
+------+-------------+-----------------------------------+

| PC11 | I2C_SCL     | EXP15_I2C_SCL I2C0_SCL #15        |

+------+-------------+-----------------------------------+

| PC4  | I2C_SDA     | ENV_I2C_SDA I2C1_SDA #17          |

| PB6  | I2C_SDA     | CCS811_I2C_SDA I2C1_SDA #6        |

+------+-------------+-----------------------------------+

| PC5  | I2C_SCL     | ENV_I2C_SCL I2C1_SCL #17          |

| PB7  | I2C_SCL     | CCS811_I2C_SCL I2C1_SCL #6        |

+------+-------------+-----------------------------------+

| PK0  | SPI_MOSI    | Flash MOSI US2_TX #29             |

+------+-------------+-----------------------------------+

boards/arm/efr32mg_sltb004a/efr32mg_sltb004a.dts

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@@ -105,9 +105,16 @@ 
};



&i2c1 {

	location-sda = <GECKO_LOCATION(17) GECKO_PORT_C GECKO_PIN(4)>;

	location-scl = <GECKO_LOCATION(17) GECKO_PORT_C GECKO_PIN(5)>;

	status = "okay";

	location-sda = <GECKO_LOCATION(6) GECKO_PORT_B GECKO_PIN(6)>;

	location-scl = <GECKO_LOCATION(6) GECKO_PORT_B GECKO_PIN(7)>;



	ccs811: ccs811@5a {

		compatible = "ams,ccs811";

		reg = <0x5a>;

		label = "CCS811";

		irq-gpios = <&gpiof 13 GPIO_ACTIVE_LOW>;

		wake-gpios = <&gpiof 15 GPIO_ACTIVE_LOW>;

	};

};



&rtcc0 {

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