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ACPI: EC: Fold acpi_ec_clear_gpe() into its caller

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Fold acpi_ec_clear_gpe() which is only used in one place into its
caller and clean up comments related to that function while at it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2020-11-23 20:00:18 +01:00
parent 2e84ea5a32
commit d269fb0313
1 changed files with 13 additions and 22 deletions
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35
drivers/acpi/ec.c
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@ -372,23 +372,6 @@ static inline void acpi_ec_disable_gpe(struct acpi_ec *ec, bool close)
}
}
static inline void acpi_ec_clear_gpe(struct acpi_ec *ec)
{
/*
* GPE STS is a W1C register, which means:
* 1. Software can clear it without worrying about clearing other
* GPEs' STS bits when the hardware sets them in parallel.
* 2. As long as software can ensure only clearing it when it is
* set, hardware won't set it in parallel.
* So software can clear GPE in any contexts.
* Warning: do not move the check into advance_transaction() as the
* EC commands will be sent without GPE raised.
*/
if (!acpi_ec_is_gpe_raised(ec))
return;
acpi_clear_gpe(NULL, ec->gpe);
}
/* --------------------------------------------------------------------------
* Transaction Management
* -------------------------------------------------------------------------- */
@ -639,13 +622,21 @@ static void advance_transaction(struct acpi_ec *ec, bool interrupt)
bool wakeup = false;
ec_dbg_stm("%s (%d)", interrupt ? "IRQ" : "TASK", smp_processor_id());
/*
* By always clearing STS before handling all indications, we can
* ensure a hardware STS 0->1 change after this clearing can always
* trigger a GPE interrupt.
* Clear GPE_STS upfront to allow subsequent hardware GPE_STS 0->1
* changes to always trigger a GPE interrupt.
*
* GPE STS is a W1C register, which means:
*
* 1. Software can clear it without worrying about clearing the other
* GPEs' STS bits when the hardware sets them in parallel.
*
* 2. As long as software can ensure only clearing it when it is set,
* hardware won't set it in parallel.
*/
if (ec->gpe >= 0)
acpi_ec_clear_gpe(ec);
if (ec->gpe >= 0 && acpi_ec_is_gpe_raised(ec))
acpi_clear_gpe(NULL, ec->gpe);
status = acpi_ec_read_status(ec);
t = ec->curr;