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| author | Peter Tyser <ptyser@xes-inc.com> | 2008-12-17 16:36:21 -0600 |
|---|---|---|
| committer | Andrew Fleming-AFLEMING <afleming@freescale.com> | 2008-12-19 18:11:49 -0600 |
| commit | e92739d34e2d6b6aca93b2598248210710897ce8 (patch) | |
| tree | 48e948a4280720cebc824335dab61f68558e13fc /include/pca953x.h | |
| parent | 7a8979591171676417ab36852d8811a8c46accd8 (diff) | |
| download | u-boot-imx-e92739d34e2d6b6aca93b2598248210710897ce8.zip u-boot-imx-e92739d34e2d6b6aca93b2598248210710897ce8.tar.gz u-boot-imx-e92739d34e2d6b6aca93b2598248210710897ce8.tar.bz2 | |
Add support for PCA953x I2C gpio devices
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>
Diffstat (limited to 'include/pca953x.h')
| -rw-r--r-- | include/pca953x.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/pca953x.h b/include/pca953x.h new file mode 100644 index 0000000..6c2b58c --- /dev/null +++ b/include/pca953x.h @@ -0,0 +1,39 @@ +/* + * Copyright 2008 Extreme Engineering Solutions, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * Version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#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_ */ |