[PATCH] hwmon: hwmon vs i2c, second round (01/11)

Add support for kind-forced addresses to i2c_probe, like i2c_detect
has for (essentially) hardware monitoring drivers.

Note that this change will slightly increase the size of the drivers
using I2C_CLIENT_INSMOD, with no immediate benefit. This is a
requirement if we want to merge i2c_probe and i2c_detect though, and
seems a reasonable price to pay in comparison with the previous
cleanups which saved much more than that (such as the i2c-isa cleanup
or the i2c address ranges removal.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

15 files changed, 34 insertions, 26 deletions

diff --git a/drivers/i2c/chips/ds1374.c b/drivers/i2c/chips/ds1374.c
index a445736d8838..e2d1daf79880 100644
--- a/drivers/i2c/chips/ds1374.c
+++ b/drivers/i2c/chips/ds1374.c
@@ -53,7 +53,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c = normal_addr,
 	.probe = ignore,
 	.ignore = ignore,
-	.force = ignore,
 };
 
 static ulong ds1374_read_rtc(void)
diff --git a/drivers/i2c/chips/m41t00.c b/drivers/i2c/chips/m41t00.c
index 778d7e12859d..e516dadc453f 100644
--- a/drivers/i2c/chips/m41t00.c
+++ b/drivers/i2c/chips/m41t00.c
@@ -42,7 +42,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_addr,
 	.probe			= ignore,
 	.ignore			= ignore,
-	.force			= ignore,
 };
 
 ulong
diff --git a/drivers/i2c/chips/rtc8564.c b/drivers/i2c/chips/rtc8564.c
index 588fc2261a91..0b5385c892b1 100644
--- a/drivers/i2c/chips/rtc8564.c
+++ b/drivers/i2c/chips/rtc8564.c
@@ -67,7 +67,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_addr,
 	.probe			= ignore,
 	.ignore			= ignore,
-	.force			= ignore,
 };
 
 static int rtc8564_read_mem(struct i2c_client *client, struct mem *mem);
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 19d8a994b3b7..372b5996d045 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -662,6 +662,28 @@ int i2c_control(struct i2c_client *client,
  * Will not work for 10-bit addresses!
  * ----------------------------------------------------
  */
+/* Return: kind (>= 0) if force found, -1 if not found */
+static inline int i2c_probe_forces(struct i2c_adapter *adapter, int addr,
+				   unsigned short **forces)
+{
+	unsigned short kind;
+	int j, adap_id = i2c_adapter_id(adapter);
+
+	for (kind = 0; forces[kind]; kind++) {
+		for (j = 0; forces[kind][j] != I2C_CLIENT_END; j += 2) {
+			if ((forces[kind][j] == adap_id ||
+			     forces[kind][j] == ANY_I2C_BUS)
+			 && forces[kind][j + 1] == addr) {
+				dev_dbg(&adapter->dev, "found force parameter, "
+					"addr 0x%02x, kind %u\n", addr, kind);
+				return kind;
+			}
+		}
+	}
+
+	return -1;
+}
+
 int i2c_probe(struct i2c_adapter *adapter,
 	      struct i2c_client_address_data *address_data,
 	      int (*found_proc) (struct i2c_adapter *, int, int))
@@ -683,19 +705,15 @@ int i2c_probe(struct i2c_adapter *adapter,
 		   at all */
 		found = 0;
 
-		for (i = 0; !found && (address_data->force[i] != I2C_CLIENT_END); i += 2) {
-			if (((adap_id == address_data->force[i]) || 
-			     (address_data->force[i] == ANY_I2C_BUS)) &&
-			     (addr == address_data->force[i+1])) {
-				dev_dbg(&adapter->dev, "found force parameter for adapter %d, addr %04x\n",
-					adap_id, addr);
-				if ((err = found_proc(adapter,addr,0)))
+		if (address_data->forces) {
+			int kind = i2c_probe_forces(adapter, addr,
+						    address_data->forces);
+			if (kind >= 0) { /* force found */
+				if ((err = found_proc(adapter, addr, kind)))
 					return err;
-				found = 1;
+				continue;
 			}
 		}
-		if (found) 
-			continue;
 
 		/* If this address is in one of the ignores, we can forget about
 		   it right now */
diff --git a/drivers/media/video/adv7170.c b/drivers/media/video/adv7170.c
index 48989eda2400..52e32f05d625 100644
--- a/drivers/media/video/adv7170.c
+++ b/drivers/media/video/adv7170.c
@@ -391,7 +391,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_adv7170;
diff --git a/drivers/media/video/adv7175.c b/drivers/media/video/adv7175.c
index f898b6586374..b5ed9544bdea 100644
--- a/drivers/media/video/adv7175.c
+++ b/drivers/media/video/adv7175.c
@@ -441,7 +441,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_adv7175;
diff --git a/drivers/media/video/bt819.c b/drivers/media/video/bt819.c
index 8733588f6db3..c6cfa7c48b04 100644
--- a/drivers/media/video/bt819.c
+++ b/drivers/media/video/bt819.c
@@ -507,7 +507,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_bt819;
diff --git a/drivers/media/video/bt856.c b/drivers/media/video/bt856.c
index a5d529ccf3ad..c13d28658868 100644
--- a/drivers/media/video/bt856.c
+++ b/drivers/media/video/bt856.c
@@ -295,7 +295,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_bt856;
diff --git a/drivers/media/video/saa7110.c b/drivers/media/video/saa7110.c
index 22d055d8a695..e116bdbed310 100644
--- a/drivers/media/video/saa7110.c
+++ b/drivers/media/video/saa7110.c
@@ -470,7 +470,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_saa7110;
diff --git a/drivers/media/video/saa7111.c b/drivers/media/video/saa7111.c
index fcd897382fcf..f18df53d98ff 100644
--- a/drivers/media/video/saa7111.c
+++ b/drivers/media/video/saa7111.c
@@ -489,7 +489,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_saa7111;
diff --git a/drivers/media/video/saa7114.c b/drivers/media/video/saa7114.c
index 2ba997f5ef1d..e0c70f54f073 100644
--- a/drivers/media/video/saa7114.c
+++ b/drivers/media/video/saa7114.c
@@ -827,7 +827,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_saa7114;
diff --git a/drivers/media/video/saa7185.c b/drivers/media/video/saa7185.c
index 108e7a4a0273..e93412f4407c 100644
--- a/drivers/media/video/saa7185.c
+++ b/drivers/media/video/saa7185.c
@@ -387,7 +387,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver i2c_driver_saa7185;
diff --git a/drivers/media/video/tuner-3036.c b/drivers/media/video/tuner-3036.c
index 7d825e510ffd..103def1abe3c 100644
--- a/drivers/media/video/tuner-3036.c
+++ b/drivers/media/video/tuner-3036.c
@@ -41,7 +41,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c	= normal_i2c,
 	.probe		= &ignore,
 	.ignore		= &ignore,
-	.force		= &ignore,
 };
 
 /* ---------------------------------------------------------------------- */
diff --git a/drivers/media/video/vpx3220.c b/drivers/media/video/vpx3220.c
index 5dbd9f6bf353..4437bdebe24f 100644
--- a/drivers/media/video/vpx3220.c
+++ b/drivers/media/video/vpx3220.c
@@ -576,7 +576,6 @@ static struct i2c_client_address_data addr_data = {
 	.normal_i2c		= normal_i2c,
 	.probe			= &ignore,
 	.ignore			= &ignore,
-	.force			= &ignore,
 };
 
 static struct i2c_driver vpx3220_i2c_driver;
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index ad1c0fb164bc..9419bc5584ad 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -48,7 +48,6 @@ struct i2c_algorithm;
 struct i2c_adapter;
 struct i2c_client;
 struct i2c_driver;
-struct i2c_client_address_data;
 union i2c_smbus_data;
 
 /*
@@ -301,7 +300,7 @@ struct i2c_client_address_data {
 	unsigned short *normal_i2c;
 	unsigned short *probe;
 	unsigned short *ignore;
-	unsigned short *force;
+	unsigned short **forces;
 };
 
 /* Internal numbers to terminate lists */
@@ -575,11 +574,15 @@ union i2c_smbus_data {
   I2C_CLIENT_MODULE_PARM(force, \
                       "List of adapter,address pairs to boldly assume " \
                       "to be present"); \
+	static unsigned short *addr_forces[] = {			\
+			force,						\
+			NULL						\
+		};							\
 	static struct i2c_client_address_data addr_data = {		\
 			.normal_i2c = 		normal_i2c,		\
 			.probe =		probe,			\
 			.ignore =		ignore,			\
-			.force =		force,			\
+			.forces =		addr_forces,		\
 		}
 
 #endif /* _LINUX_I2C_H */