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https://github.com/brain-hackers/u-boot-brain
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e92739d34e
Initial support for NXP's 4 and 8 bit I2C gpio expanders (eg pca9537, pca9557, etc). The CONFIG_PCA953X define enables support for the devices while the CONFIG_CMD_PCA953X define enables the pca953x command. The CONFIG_CMD_PCA953X_INFO define enables an 'info' sub-command which provides summary information for the given pca953x device. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
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* Copyright 2008 Extreme Engineering Solutions, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __PCA953X_H_
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#define __PCA953X_H_
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#define PCA953X_IN 0x00
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#define PCA953X_OUT 0x01
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#define PCA953X_POL 0x02
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#define PCA953X_CONF 0x03
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#define PCA953X_OUT_LOW 0
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#define PCA953X_OUT_HIGH 1
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#define PCA953X_POL_NORMAL 0
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#define PCA953X_POL_INVERT 1
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#define PCA953X_DIR_OUT 0
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#define PCA953X_DIR_IN 1
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int pca953x_set_val(u8 chip, uint mask, uint data);
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int pca953x_set_pol(u8 chip, uint mask, uint data);
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int pca953x_set_dir(u8 chip, uint mask, uint data);
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int pca953x_get_val(u8 chip);
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#endif /* __PCA953X_H_ */
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