Changeset 5657

Timestamp:

02/18/09 21:26:20 (4 years ago)

Author:

jwrdegoede

Message:

sensors-detect: Add a special case for probing i2c address 0x73 for FSC chips,
as at least the Syleus locks up with our regular probe code. Note that to our
current knowledge only FSC chips live on this address, and for them
this probe method is safe.

Location:

lm-sensors/trunk

Files:

• CHANGES (modified) (1 diff)
• prog/detect/sensors-detect (modified) (2 diffs)

lm-sensors/trunk/CHANGES

@@ -79 +79 @@
                   Add nNidia nForce MCP67, MCP73, MCP79 SMBus support
                   Exclude auto-loaded PCI and USB drivers from list (#2368)
+                  Special case probing i2c address 0x73 (to not crash FSC ICs)
   sensors-detect-stat.pl: Delete (functionality merged into sensors-detect)
   sysconfig-lm_sensors-convert: Sample config file conversion script (#2246)

lm-sensors/trunk/prog/detect/sensors-detect

@@ -2517 +2517 @@
 use constant I2C_FUNC_SMBUS_QUICK       => 0x00010000;
 use constant I2C_FUNC_SMBUS_READ_BYTE   => 0x00020000;
+use constant I2C_FUNC_SMBUS_READ_BYTE_DATA      => 0x00080000;
 
 # Get the i2c adapter's functionalities
@@ -2640 +2641 @@
                 return 0 unless ($funcs & I2C_FUNC_SMBUS_READ_BYTE);
                 return i2c_smbus_access($file, SMBUS_READ, 0, SMBUS_BYTE, []);
+        } elsif ($addr == 0x73) {
+                # Special case for FSC chips, as at least the Syleus locks
+                # up with our regular probe code. Note that to our current
+                # knowledge only FSC chips live on this address, and for them
+                # this probe method is safe.
+                return 0 unless ($funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA);
+                return i2c_smbus_access($file, SMBUS_READ, 0, SMBUS_BYTE_DATA, []);
         } else {
                 return 0 unless ($funcs & I2C_FUNC_SMBUS_QUICK);