[thirdparty/u-boot.git] / board / freescale / common / i2c_mux.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2014 Freescale Semiconductor, Inc.
 * Copyright 2020-21 NXP
 * Copyright 2021 Microsoft Corporation
 */

#include <common.h>
#include <i2c.h>
#include "i2c_common.h"
#include "i2c_mux.h"

/*
 * A new Kconfig option for something that used to always be built should be
 * "default y".
 */
#ifdef CONFIG_FSL_USE_PCA9547_MUX

int select_i2c_ch_pca9547(u8 ch, int bus)
{
	int ret;
	DEVICE_HANDLE_T dev;

	/* Open device handle */
	ret = fsl_i2c_get_device(I2C_MUX_PCA_ADDR_PRI, bus, &dev);
	if (ret) {
		printf("PCA: No PCA9547 device found\n");
		return ret;
	}

	ret = I2C_WRITE(dev, 0, &ch, sizeof(ch));
	if (ret) {
		printf("PCA: Unable to select channel %d (%d)\n", (int)ch, ret);
		return ret;
	}

	return 0;
}

#endif
Commit	Line	Data
15347d2d SC	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Copyright 2014 Freescale Semiconductor, Inc.
	4	* Copyright 2020-21 NXP
	5	* Copyright 2021 Microsoft Corporation
	6	*/
	7
d678a59d	8	#include <common.h>
15347d2d SC	9	#include <i2c.h>
	10	#include "i2c_common.h"
	11	#include "i2c_mux.h"
	12
	13	/*
	14	* A new Kconfig option for something that used to always be built should be
81f3a665	15	* "default y".
15347d2d SC	16	*/
	17	#ifdef CONFIG_FSL_USE_PCA9547_MUX
	18
	19	int select_i2c_ch_pca9547(u8 ch, int bus)
	20	{
	21	int ret;
	22	DEVICE_HANDLE_T dev;
	23
	24	/* Open device handle */
	25	ret = fsl_i2c_get_device(I2C_MUX_PCA_ADDR_PRI, bus, &dev);
	26	if (ret) {
	27	printf("PCA: No PCA9547 device found\n");
	28	return ret;
	29	}
	30
	31	ret = I2C_WRITE(dev, 0, &ch, sizeof(ch));
	32	if (ret) {
	33	printf("PCA: Unable to select channel %d (%d)\n", (int)ch, ret);
	34	return ret;
	35	}
	36
	37	return 0;
	38	}
	39
	40	#endif