upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/include/pca953x.h

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/*
* Copyright 2008 Extreme Engineering Solutions, Inc.
*
* SPDX-License-Identifier: GPL-2.0
*/
#ifndef __PCA953X_H_
#define __PCA953X_H_
#define PCA953X_IN 0x00
#define PCA953X_OUT 0x01
#define PCA953X_POL 0x02
#define PCA953X_CONF 0x03
#define PCA953X_OUT_LOW 0
#define PCA953X_OUT_HIGH 1
#define PCA953X_POL_NORMAL 0
#define PCA953X_POL_INVERT 1
#define PCA953X_DIR_OUT 0
#define PCA953X_DIR_IN 1
int pca953x_set_val(u8 chip, uint mask, uint data);
int pca953x_set_pol(u8 chip, uint mask, uint data);
int pca953x_set_dir(u8 chip, uint mask, uint data);
int pca953x_get_val(u8 chip);
#endif /* __PCA953X_H_ */