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mei: condition PGI support on HW and HBM version

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Enable power gating isolation only if hw and fw support it.
This is indicated by ME_PGIC_HRA bit in ME_CSR_HA register
and on HBM protocol version.

The information is exported to MEI layer through
new pg_is_enabled hw op.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2014-03-18 22:51:58 +02:00
committed by Greg Kroah-Hartman
parent b16c35716b
commit ee7e5afd2c
4 changed files with 67 additions and 0 deletions
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14
drivers/misc/mei/hw-txe.c
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@@ -279,6 +279,18 @@ int mei_txe_aliveness_set_sync(struct mei_device *dev, u32 req)
return 0;
}
/**
* mei_txe_pg_is_enabled - detect if PG is supported by HW
*
* @dev: the device structure
*
* returns: true is pg supported, false otherwise
*/
static bool mei_txe_pg_is_enabled(struct mei_device *dev)
{
return true;
}
/**
* mei_txe_input_ready_interrupt_enable - sets the Input Ready Interrupt
*
@@ -1017,6 +1029,8 @@ static const struct mei_hw_ops mei_txe_hw_ops = {
.hw_config = mei_txe_hw_config,
.hw_start = mei_txe_hw_start,
.pg_is_enabled = mei_txe_pg_is_enabled,
.intr_clear = mei_txe_intr_clear,
.intr_enable = mei_txe_intr_enable,
.intr_disable = mei_txe_intr_disable,