i2c-algo-pca: Add PCA9665 support

Add support for the PCA9665 I2C controller.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 31 insertions, 2 deletions

diff --git a/include/linux/i2c-algo-pca.h b/include/linux/i2c-algo-pca.h
index adcb3dc7ac26..1364d62e2fbe 100644
--- a/include/linux/i2c-algo-pca.h
+++ b/include/linux/i2c-algo-pca.h
@@ -1,7 +1,14 @@
 #ifndef _LINUX_I2C_ALGO_PCA_H
 #define _LINUX_I2C_ALGO_PCA_H
 
-/* Clock speeds for the bus */
+/* Chips known to the pca algo */
+#define I2C_PCA_CHIP_9564       0x00
+#define I2C_PCA_CHIP_9665       0x01
+
+/* Internal period for PCA9665 oscilator */
+#define I2C_PCA_OSC_PER         3 /* e10-8s */
+
+/* Clock speeds for the bus for PCA9564*/
 #define I2C_PCA_CON_330kHz      0x00
 #define I2C_PCA_CON_288kHz      0x01
 #define I2C_PCA_CON_217kHz      0x02
@@ -18,6 +25,26 @@
 #define I2C_PCA_ADR             0x02 /* OWN ADR Read/Write */
 #define I2C_PCA_CON             0x03 /* CONTROL Read/Write */
 
+/* PCA9665 registers */
+#define I2C_PCA_INDPTR          0x00 /* INDIRECT Pointer Write Only */
+#define I2C_PCA_IND             0x02 /* INDIRECT Read/Write */
+
+/* PCA9665 indirect registers */
+#define I2C_PCA_ICOUNT          0x00 /* Byte Count for buffered mode */
+#define I2C_PCA_IADR            0x01 /* OWN ADR */
+#define I2C_PCA_ISCLL           0x02 /* SCL LOW period */
+#define I2C_PCA_ISCLH           0x03 /* SCL HIGH period */
+#define I2C_PCA_ITO             0x04 /* TIMEOUT */
+#define I2C_PCA_IPRESET         0x05 /* Parallel bus reset */
+#define I2C_PCA_IMODE           0x06 /* I2C Bus mode */
+
+/* PCA9665 I2C bus mode */
+#define I2C_PCA_MODE_STD        0x00 /* Standard mode */
+#define I2C_PCA_MODE_FAST       0x01 /* Fast mode */
+#define I2C_PCA_MODE_FASTP      0x02 /* Fast Plus mode */
+#define I2C_PCA_MODE_TURBO      0x03 /* Turbo mode */
+
+
 #define I2C_PCA_CON_AA          0x80 /* Assert Acknowledge */
 #define I2C_PCA_CON_ENSIO       0x40 /* Enable */
 #define I2C_PCA_CON_STA         0x20 /* Start */
@@ -31,7 +58,9 @@ struct i2c_algo_pca_data {
         int  (*read_byte)               (void *data, int reg);
         int  (*wait_for_completion)     (void *data);
         void (*reset_chip)              (void *data);
-        /* i2c_clock values are defined in linux/i2c-algo-pca.h */
+        /* For PCA9564, use one of the predefined frequencies:
+         * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000
+         * For PCA9665, use the frequency you want here. */
         unsigned int                    i2c_clock;
 };