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Diffstat (limited to 'board/freescale/common/i2c_mux.c')
-rw-r--r-- | board/freescale/common/i2c_mux.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/board/freescale/common/i2c_mux.c b/board/freescale/common/i2c_mux.c new file mode 100644 index 0000000000..54f89e2576 --- /dev/null +++ b/board/freescale/common/i2c_mux.c @@ -0,0 +1,40 @@ +// 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 |