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Restore bank register value after bank switching.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3284 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2006-04-15 10:34:28 +00:00
parent 688b2149dc
commit c94e355e0a
1 changed files with 10 additions and 3 deletions
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13
prog/dump/i2cdump.c
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@@ -48,7 +48,7 @@ int main(int argc, char *argv[])
{ {
char *end; char *end;
int i, j, res, i2cbus, address, size, file; int i, j, res, i2cbus, address, size, file;
int bank = 0, bankreg = 0x4E; int bank = 0, bankreg = 0x4E, old_bank = 0;
char filename[20]; char filename[20];
long funcs; long funcs;
int block[256]; int block[256];
@@ -279,7 +279,14 @@ int main(int argc, char *argv[])
/* See Winbond w83781d data sheet for bank details */ /* See Winbond w83781d data sheet for bank details */
if (bank && size != I2C_SMBUS_BLOCK_DATA) { if (bank && size != I2C_SMBUS_BLOCK_DATA) {
i2c_smbus_write_byte_data(file, bankreg, bank | 0x80); old_bank = i2c_smbus_read_byte_data(file, bankreg);
if (old_bank >= 0)
res = i2c_smbus_write_byte_data(file, bankreg,
bank | (old_bank & 0xf0));
if (old_bank < 0 || res < 0) {
fprintf(stderr, "Error: Bank switching failed\n");
exit(1);
}
} }
/* handle all but word data */ /* handle all but word data */
@@ -376,7 +383,7 @@ int main(int argc, char *argv[])
} }
} }
if (bank && size != I2C_SMBUS_BLOCK_DATA) { if (bank && size != I2C_SMBUS_BLOCK_DATA) {
i2c_smbus_write_byte_data(file, bankreg, 0x80); i2c_smbus_write_byte_data(file, bankreg, old_bank);
} }
exit(0); exit(0);
} }