diff options
| author | Dan Murphy <dmurphy@ti.com> | 2013-07-11 13:10:27 -0500 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-07-30 09:21:42 -0400 |
| commit | 61c1775f16ed122a07168545afbc1a04ece2bc22 (patch) | |
| tree | 2a40ad92c18c7a2854326d4b46526155e775bd6c /include | |
| parent | f881a4df4f34e3902b27003a20b7cf9f15251482 (diff) | |
| download | u-boot-imx-61c1775f16ed122a07168545afbc1a04ece2bc22.zip u-boot-imx-61c1775f16ed122a07168545afbc1a04ece2bc22.tar.gz u-boot-imx-61c1775f16ed122a07168545afbc1a04ece2bc22.tar.bz2 | |
gpio: tca642x: Add the tca642x gpio expander driver
Add the tca642x gpio expander driver
Datasheet:
http://www.ti.com/product/tca6424a
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/tca642x.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/tca642x.h b/include/tca642x.h new file mode 100644 index 0000000..bda86c1 --- /dev/null +++ b/include/tca642x.h @@ -0,0 +1,69 @@ +/* + * Copyright 2013 Texas Instruments, Inc. + * Author: Dan Murphy <dmurphy@ti.com> + * + * Derived work from the pca953x.c driver + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 __TCA642X_H_ +#define __TCA642X_H_ + +#ifdef CONFIG_CMD_TCA642X +enum { + TCA642X_CMD_INFO, + TCA642X_CMD_DEVICE, + TCA642X_CMD_OUTPUT, + TCA642X_CMD_INPUT, + TCA642X_CMD_INVERT, +}; +#endif + +#define TCA642X_OUT_LOW 0 +#define TCA642X_OUT_HIGH 1 +#define TCA642X_POL_NORMAL 0 +#define TCA642X_POL_INVERT 1 +#define TCA642X_DIR_OUT 0 +#define TCA642X_DIR_IN 1 + +/* Default to an address that hopefully won't corrupt other i2c devices */ +#ifndef CONFIG_SYS_I2C_TCA642X_ADDR +#define CONFIG_SYS_I2C_TCA642X_ADDR (~0) +#endif + +/* Default to an address that hopefully won't corrupt other i2c devices */ +#ifndef CONFIG_SYS_I2C_TCA642X_BUS_NUM +#define CONFIG_SYS_I2C_TCA642X_BUS_NUM (0) +#endif + +struct tca642x_bank_info { + uint8_t input_reg; + uint8_t output_reg; + uint8_t polarity_reg; + uint8_t configuration_reg; +}; + +int tca642x_set_val(uchar chip, uint8_t gpio_bank, + uint8_t reg_bit, uint8_t data); +int tca642x_set_pol(uchar chip, uint8_t gpio_bank, + uint8_t reg_bit, uint8_t data); +int tca642x_set_dir(uchar chip, uint8_t gpio_bank, + uint8_t reg_bit, uint8_t data); +int tca642x_get_val(uchar chip, uint8_t gpio_bank); +int tca642x_set_inital_state(uchar chip, struct tca642x_bank_info init_data[]); + +#endif /* __TCA642X_H_ */ |