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15347d2dea
Refactors similar mux code from multiple NXP boards into a common location, and allows it to be disabled in config. New config: CONFIG_FSL_USE_PCA9547_MUX to enable PCA9547 mux functionality. Signed-off-by: Stephen Carlson <stcarlso@linux.microsoft.com> Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
40 lines
778 B
C
40 lines
778 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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* Copyright 2020-21 NXP
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* Copyright 2021 Microsoft Corporation
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*/
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#include <common.h>
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#include <i2c.h>
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#include "i2c_common.h"
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#include "i2c_mux.h"
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/*
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* A new Kconfig option for something that used to always be built should be
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* “default y”.
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*/
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#ifdef CONFIG_FSL_USE_PCA9547_MUX
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int select_i2c_ch_pca9547(u8 ch, int bus)
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{
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int ret;
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DEVICE_HANDLE_T dev;
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/* Open device handle */
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ret = fsl_i2c_get_device(I2C_MUX_PCA_ADDR_PRI, bus, &dev);
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if (ret) {
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printf("PCA: No PCA9547 device found\n");
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return ret;
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}
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ret = I2C_WRITE(dev, 0, &ch, sizeof(ch));
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if (ret) {
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printf("PCA: Unable to select channel %d (%d)\n", (int)ch, ret);
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return ret;
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}
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return 0;
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}
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#endif
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