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ACPI: EC: Some hardware requires burst mode to operate properly

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Burst mode temporary (50 ms) locks EC to do only transactions with
driver, without it some hardware returns abstract garbage.

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=9341

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2008-01-11 02:42:57 +03:00 committed by Len Brown
parent 3e71a87d03
commit b3b233c7d9
1 changed files with 4 additions and 0 deletions
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4
drivers/acpi/ec.c
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@ -575,6 +575,8 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
if (bits != 8 && acpi_strict)
return AE_BAD_PARAMETER;
acpi_ec_burst_enable(ec);
if (function == ACPI_READ) {
result = acpi_ec_read(ec, address, &temp);
*value = temp;
@ -594,6 +596,8 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
}
}
acpi_ec_burst_disable(ec);
switch (result) {
case -EINVAL:
return AE_BAD_PARAMETER;