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ACPI / CPPC: check for error bit in PCC status field

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PCC status field exposes an error bit(2) to indicate any errors during
the execution of last comamnd. This patch checks the error bit before
notifying success/failure to the cpufreq driver.

Signed-off-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Prakash, Prashanth 2016-08-16 14:39:44 -06:00 • committed by Rafael J. Wysocki
parent 8482ef8c6e
commit 139aee73f0
2 changed files with 34 additions and 36 deletions
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4
include/acpi/cppc_acpi.h
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@ -24,7 +24,9 @@
#define CPPC_NUM_ENT 21
#define CPPC_REV 2
#define PCC_CMD_COMPLETE 1
#define PCC_CMD_COMPLETE_MASK (1 << 0)
#define PCC_ERROR_MASK (1 << 2)
#define MAX_CPC_REG_ENT 19
/* CPPC specific PCC commands. */