mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 12:33:41 +00:00
41 lines
778 B
C
41 lines
778 B
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
|