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fixed logic by restoring of Host Master Clock

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1630 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Alexander Malysh committed 2002-11-20 00:15:02 +00:00
1 parent 15dd6f26c2
commit fc1716194b
1 file changed
+9 -16
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kernel/busses/i2c-sis630.c
+9 -16
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@@ -21,6 +21,8 @@
/*
Changes:
19.11.2002
Fixed logic by restoring of Host Master Clock
24.09.2002
Fixed typo in sis630_access
Fixed logical error by restoring of Host Master Clock
@@ -36,11 +38,6 @@
Changed sis630_transaction. Now it's 2x faster (Thanks to Mark M. Hoffman)
*/
/*
TODO:
Implement block data write/read
Test on 2.2 kernel
*/
/*
Status: beta
@@ -243,7 +240,7 @@ int sis630_transaction(int size) {
if (high_clock > 0)
sis630_write(SMB_CNT, 0x20);
else
sis630_write(SMB_CNT, 0x00);
sis630_write(SMB_CNT, (oldclock & ~0x40));
/* clear all sticky bits */
temp = sis630_read(SMB_STS);
@@ -291,16 +288,12 @@ int sis630_transaction(int size) {
printk(KERN_DEBUG "i2c-sis630.o: SMB_CNT before clock restore 0x%02x\n", sis630_read(SMB_CNT));
#endif
/* restore old Host Master Clock */
switch(oldclock & 0x20) {
case 1:
sis630_write(SMB_CNT, sis630_read(SMB_CNT) | 0x20);
break;
case 0:
oldclock = sis630_read(SMB_CNT) & ~0x20;
sis630_write(SMB_CNT,oldclock);
break;
}
/*
* restore old Host Master Clock if high_clock is set
* and oldclock was not 56KHz
*/
if (high_clock > 0 && !(oldclock & 0x20))
sis630_write(SMB_CNT,(sis630_read(SMB_CNT) & ~0x20));
#ifdef DEBUG
printk(KERN_DEBUG "i2c-sis630.o: SMB_CNT after clock restore 0x%02x\n", sis630_read(SMB_CNT));