i2c-algo-pcf: Delete broken 10-bit address support
The 10-bit address support in i2c-algo-pcf is so heavily broken that
it can't have ever been used. Nobody ever complained, so I'll take it
that nobody needs it. Let's just delete it.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c
index ab2e6f3..8907b01 100644
--- a/drivers/i2c/algos/i2c-algo-pcf.c
+++ b/drivers/i2c/algos/i2c-algo-pcf.c
@@ -203,35 +203,6 @@
/* ----- Utility functions
*/
-static inline int try_address(struct i2c_algo_pcf_data *adap,
- unsigned char addr, int retries)
-{
- int i, status, ret = -1;
- int wfp;
- for (i=0;i<retries;i++) {
- i2c_outb(adap, addr);
- i2c_start(adap);
- status = get_pcf(adap, 1);
- if ((wfp = wait_for_pin(adap, &status)) >= 0) {
- if ((status & I2C_PCF_LRB) == 0) {
- i2c_stop(adap);
- break; /* success! */
- }
- }
- if (wfp == -EINTR) {
- /* arbitration lost */
- udelay(adap->udelay);
- return -EINTR;
- }
- i2c_stop(adap);
- udelay(adap->udelay);
- }
- DEB2(if (i) printk(KERN_DEBUG "i2c-algo-pcf.o: needed %d retries for %d\n",i,
- addr));
- return ret;
-}
-
-
static int pcf_sendbytes(struct i2c_adapter *i2c_adap, const char *buf,
int count, int last)
{
@@ -321,47 +292,19 @@
}
-static inline int pcf_doAddress(struct i2c_algo_pcf_data *adap,
- struct i2c_msg *msg, int retries)
+static int pcf_doAddress(struct i2c_algo_pcf_data *adap,
+ struct i2c_msg *msg)
{
unsigned short flags = msg->flags;
unsigned char addr;
- int ret;
- if ( (flags & I2C_M_TEN) ) {
- /* a ten bit address */
- addr = 0xf0 | (( msg->addr >> 7) & 0x03);
- DEB2(printk(KERN_DEBUG "addr0: %d\n",addr));
- /* try extended address code...*/
- ret = try_address(adap, addr, retries);
- if (ret!=1) {
- printk(KERN_ERR "died at extended address code.\n");
- return -EREMOTEIO;
- }
- /* the remaining 8 bit address */
- i2c_outb(adap,msg->addr & 0x7f);
-/* Status check comes here */
- if (ret != 1) {
- printk(KERN_ERR "died at 2nd address code.\n");
- return -EREMOTEIO;
- }
- if ( flags & I2C_M_RD ) {
- i2c_repstart(adap);
- /* okay, now switch into reading mode */
- addr |= 0x01;
- ret = try_address(adap, addr, retries);
- if (ret!=1) {
- printk(KERN_ERR "died at extended address code.\n");
- return -EREMOTEIO;
- }
- }
- } else { /* normal 7bit address */
- addr = ( msg->addr << 1 );
- if (flags & I2C_M_RD )
- addr |= 1;
- if (flags & I2C_M_REV_DIR_ADDR )
- addr ^= 1;
- i2c_outb(adap, addr);
- }
+
+ addr = msg->addr << 1;
+ if (flags & I2C_M_RD)
+ addr |= 1;
+ if (flags & I2C_M_REV_DIR_ADDR)
+ addr ^= 1;
+ i2c_outb(adap, addr);
+
return 0;
}
@@ -390,7 +333,7 @@
pmsg->flags & I2C_M_RD ? "read" : "write",
pmsg->len, pmsg->addr, i + 1, num);)
- ret = pcf_doAddress(adap, pmsg, i2c_adap->retries);
+ ret = pcf_doAddress(adap, pmsg);
/* Send START */
if (i == 0) {
@@ -453,7 +396,7 @@
static u32 pcf_func(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
- I2C_FUNC_10BIT_ADDR | I2C_FUNC_PROTOCOL_MANGLING;
+ I2C_FUNC_PROTOCOL_MANGLING;
}
/* -----exported algorithm data: ------------------------------------- */
@@ -475,9 +418,7 @@
/* register new adapter to i2c module... */
adap->algo = &pcf_algo;
-
- adap->timeout = 100; /* default values, should */
- adap->retries = 3; /* be replaced by defines */
+ adap->timeout = 100;
if ((rval = pcf_init_8584(pcf_adap)))
return rval;