41 files changed, 216 insertions, 166 deletions

diff --git a/Documentation/i2c/busses/i2c-i801 b/Documentation/i2c/busses/i2c-i801
index e1bb5b261693..e307914a3eda 100644
--- a/Documentation/i2c/busses/i2c-i801
+++ b/Documentation/i2c/busses/i2c-i801
@@ -27,7 +27,13 @@ Authors:
 Module Parameters
 -----------------
 
-None.
+* disable_features (bit vector)
+Disable selected features normally supported by the device. This makes it
+possible to work around possible driver or hardware bugs if the feature in
+question doesn't work as intended for whatever reason. Bit values:
+  1  disable SMBus PEC
+  2  disable the block buffer
+  8  disable the I2C block read functionality
 
 
 Description
diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index dcdaf8e675bf..2b9a8f54bb2c 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -109,13 +109,13 @@ static void pca_stop(struct i2c_algo_pca_data *adap)
  * returns after the address has been sent
  */
 static int pca_address(struct i2c_algo_pca_data *adap,
-                        struct i2c_msg *msg)
+                       struct i2c_msg *msg)
 {
         int sta = pca_get_con(adap);
         int addr;
 
-        addr = ( (0x7f & msg->addr) << 1 );
-        if (msg->flags & I2C_M_RD )
+        addr = ((0x7f & msg->addr) << 1);
+        if (msg->flags & I2C_M_RD)
                 addr |= 1;
         DEB2("=== SLAVE ADDRESS %#04x+%c=%#04x\n",
              msg->addr, msg->flags & I2C_M_RD ? 'R' : 'W', addr);
@@ -134,7 +134,7 @@ static int pca_address(struct i2c_algo_pca_data *adap,
  * Returns after the byte has been transmitted
  */
 static int pca_tx_byte(struct i2c_algo_pca_data *adap,
-                        __u8 b)
+                       __u8 b)
 {
         int sta = pca_get_con(adap);
         DEB2("=== WRITE %#04x\n", b);
@@ -164,13 +164,13 @@ static void pca_rx_byte(struct i2c_algo_pca_data *adap,
  * Returns after next byte has arrived.
  */
 static int pca_rx_ack(struct i2c_algo_pca_data *adap,
-                       int ack)
+                      int ack)
 {
         int sta = pca_get_con(adap);
 
         sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI|I2C_PCA_CON_AA);
 
-        if ( ack )
+        if (ack)
                 sta |= I2C_PCA_CON_AA;
 
         pca_set_con(adap, sta);
@@ -178,12 +178,12 @@ static int pca_rx_ack(struct i2c_algo_pca_data *adap,
 }
 
 static int pca_xfer(struct i2c_adapter *i2c_adap,
-                    struct i2c_msg *msgs,
-                    int num)
+                    struct i2c_msg *msgs,
+                    int num)
 {
-        struct i2c_algo_pca_data *adap = i2c_adap->algo_data;
-        struct i2c_msg *msg = NULL;
-        int curmsg;
+        struct i2c_algo_pca_data *adap = i2c_adap->algo_data;
+        struct i2c_msg *msg = NULL;
+        int curmsg;
         int numbytes = 0;
         int state;
         int ret;
@@ -202,21 +202,21 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,
 
         DEB1("{{{ XFER %d messages\n", num);
 
-        if (i2c_debug>=2) {
+        if (i2c_debug >= 2) {
                 for (curmsg = 0; curmsg < num; curmsg++) {
                         int addr, i;
                         msg = &msgs[curmsg];
 
                         addr = (0x7f & msg->addr) ;
 
-                        if (msg->flags & I2C_M_RD )
+                        if (msg->flags & I2C_M_RD)
                                 printk(KERN_INFO "    [%02d] RD %d bytes from %#02x [%#02x, ...]\n",
-                                       curmsg, msg->len, addr, (addr<<1) | 1);
+                                       curmsg, msg->len, addr, (addr << 1) | 1);
                         else {
                                 printk(KERN_INFO "    [%02d] WR %d bytes to %#02x [%#02x%s",
-                                       curmsg, msg->len, addr, addr<<1,
+                                       curmsg, msg->len, addr, addr << 1,
                                        msg->len == 0 ? "" : ", ");
-                                for(i=0; i < msg->len; i++)
+                                for (i = 0; i < msg->len; i++)
                                         printk("%#04x%s", msg->buf[i], i == msg->len - 1 ? "" : ", ");
                                 printk("]\n");
                         }
@@ -305,7 +305,7 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,