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authorDan Murphy <dmurphy@ti.com>2013-07-11 13:10:27 -0500
committerTom Rini <trini@ti.com>2013-07-30 09:21:42 -0400
commit61c1775f16ed122a07168545afbc1a04ece2bc22 (patch)
tree2a40ad92c18c7a2854326d4b46526155e775bd6c /include
parentf881a4df4f34e3902b27003a20b7cf9f15251482 (diff)
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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.h69
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_ */