61c1775f16
Add the tca642x gpio expander driver Datasheet: http://www.ti.com/product/tca6424a Signed-off-by: Dan Murphy <dmurphy@ti.com>
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*
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* Copyright 2013 Texas Instruments, Inc.
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* Author: Dan Murphy <dmurphy@ti.com>
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*
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* Derived work from the pca953x.c driver
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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 as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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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 __TCA642X_H_
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#define __TCA642X_H_
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#ifdef CONFIG_CMD_TCA642X
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enum {
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TCA642X_CMD_INFO,
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TCA642X_CMD_DEVICE,
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TCA642X_CMD_OUTPUT,
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TCA642X_CMD_INPUT,
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TCA642X_CMD_INVERT,
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};
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#endif
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#define TCA642X_OUT_LOW 0
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#define TCA642X_OUT_HIGH 1
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#define TCA642X_POL_NORMAL 0
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#define TCA642X_POL_INVERT 1
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#define TCA642X_DIR_OUT 0
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#define TCA642X_DIR_IN 1
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/* Default to an address that hopefully won't corrupt other i2c devices */
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#ifndef CONFIG_SYS_I2C_TCA642X_ADDR
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#define CONFIG_SYS_I2C_TCA642X_ADDR (~0)
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#endif
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/* Default to an address that hopefully won't corrupt other i2c devices */
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#ifndef CONFIG_SYS_I2C_TCA642X_BUS_NUM
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#define CONFIG_SYS_I2C_TCA642X_BUS_NUM (0)
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#endif
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struct tca642x_bank_info {
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uint8_t input_reg;
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uint8_t output_reg;
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uint8_t polarity_reg;
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uint8_t configuration_reg;
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};
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int tca642x_set_val(uchar chip, uint8_t gpio_bank,
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uint8_t reg_bit, uint8_t data);
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int tca642x_set_pol(uchar chip, uint8_t gpio_bank,
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uint8_t reg_bit, uint8_t data);
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int tca642x_set_dir(uchar chip, uint8_t gpio_bank,
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uint8_t reg_bit, uint8_t data);
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int tca642x_get_val(uchar chip, uint8_t gpio_bank);
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int tca642x_set_inital_state(uchar chip, struct tca642x_bank_info init_data[]);
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#endif /* __TCA642X_H_ */
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