pca9675: Add code to fit standard I/O expander functionality

Added code so that PCA9675 I/O expander driver fits standard
I/O expander functionality.

BUG=b:169814014
BRANCH=none
TEST=Manually tested on ADLRVP, ioexget & ioexset works

Cq-Depend: chromium:2845014
Change-Id: I07957a3f1de9b70fc396d767e8cc3ac8884b9c2e
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2829985
Reviewed-by: caveh jalali <caveh@chromium.org>

1 files changed, 21 insertions, 69 deletions

diff --git a/driver/ioexpander/pca9675.h b/driver/ioexpander/pca9675.h
index e01278f7d6..59f36918a4 100644
--- a/driver/ioexpander/pca9675.h
+++ b/driver/ioexpander/pca9675.h
@@ -8,80 +8,32 @@
 #ifndef __CROS_EC_IOEXPANDER_PCA9675_H
 #define __CROS_EC_IOEXPANDER_PCA9675_H
 
-#include <stdbool.h>
-
-#include "hooks.h"
-#include "i2c.h"
-
-#define PCA9675_IO_P00	BIT(0)
-#define PCA9675_IO_P01	BIT(1)
-#define PCA9675_IO_P02	BIT(2)
-#define PCA9675_IO_P03	BIT(3)
-#define PCA9675_IO_P04	BIT(4)
-#define PCA9675_IO_P05	BIT(5)
-#define PCA9675_IO_P06	BIT(6)
-#define PCA9675_IO_P07	BIT(7)
-
-#define PCA9675_IO_P10	BIT(8)
-#define PCA9675_IO_P11	BIT(9)
-#define PCA9675_IO_P12	BIT(10)
-#define PCA9675_IO_P13	BIT(11)
-#define PCA9675_IO_P14	BIT(12)
-#define PCA9675_IO_P15	BIT(13)
-#define PCA9675_IO_P16	BIT(14)
-#define PCA9675_IO_P17	BIT(15)
+/* PCA9675 IO pins that can be referenced in gpio.inc */
+enum pca9675_io_pins {
+	PCA9675_IO_P00,
+	PCA9675_IO_P01,
+	PCA9675_IO_P02,
+	PCA9675_IO_P03,
+	PCA9675_IO_P04,
+	PCA9675_IO_P05,
+	PCA9675_IO_P06,
+	PCA9675_IO_P07,
+	PCA9675_IO_P10,
+	PCA9675_IO_P11,
+	PCA9675_IO_P12,
+	PCA9675_IO_P13,
+	PCA9675_IO_P14,
+	PCA9675_IO_P15,
+	PCA9675_IO_P16,
+	PCA9675_IO_P17,
+};
 
-/* Sent 06 to address 00 to reset the PCA9675 to back to power up state */
+/* Write 06 to address 00 to reset the PCA9675 to back to power up state */
 #define PCA9675_RESET_SEQ_DATA 0x06
 
 /* Default I/O directons of PCA9675 is input */
 #define PCA9675_DEFAULT_IO_DIRECTION 0xffff
 
-#define HOOK_PRIO_INIT_PCA9675 (HOOK_PRIO_INIT_I2C + 1)
-
-/* PCA9675 IOexpander structure */
-struct pca9675_ioexpander {
-	/* Physical I2C port connects to the IO expander chip. */
-	const int i2c_host_port;
-	/* I2C slave address */
-	const uint16_t i2c_addr_flags;
-	/* I/O port direction (1 = input, 0 = output) */
-	const uint16_t io_direction;
-};
-
-extern const struct pca9675_ioexpander pca9675_iox[];
-
-/*
- * Get input level. Note that this reflects the actual level on the
- * pin, even if the pin is configured as output.
- *
- * @param ioex   I/O expander port number
- * @param pin    Pin number
- * @param level  Pointer to get pin level
- *
- * @return EC_SUCCESS, or EC_ERROR_* on error.
- */
-int pca9675_get_pin(int ioex, uint16_t pin, bool *level);
-
-/*
- * Update pin levels. This function has no effect if the pin is
- * configured as input.
- *
- * @param ioex       I/O expander port number
- * @param setpins    Pins to be set
- * @param clearpins  Pins to be cleared
- *
- * @return EC_SUCCESS, or EC_ERROR_* on error.
- */
-int pca9675_update_pins(int ioex, uint16_t setpins, uint16_t clearpins);
-
-/*
- * Initialize the PCA9675 to power up state
- *
- * @param ioex  I/O expander port number
- *
- * @return EC_SUCCESS, or EC_ERROR_* on error.
- */
-int pca9675_init(int ioex);
+extern const struct ioexpander_drv pca9675_ioexpander_drv;
 
 #endif /* __CROS_EC_IOEXPANDER_PCA9675_H */