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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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10
drivers/misc/mei/mei_dev.h
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@@ -220,6 +220,8 @@ struct mei_cl {
* @hw_start - start hw after reset
* @hw_config - configure hw
* @pg_is_enabled - is power gating enabled
* @intr_clear - clear pending interrupts
* @intr_enable - enable interrupts
* @intr_disable - disable interrupts
@@ -244,6 +246,8 @@ struct mei_hw_ops {
int (*hw_start)(struct mei_device *dev);
void (*hw_config)(struct mei_device *dev);
bool (*pg_is_enabled)(struct mei_device *dev);
void (*intr_clear)(struct mei_device *dev);
void (*intr_enable)(struct mei_device *dev);
void (*intr_disable)(struct mei_device *dev);
@@ -558,6 +562,12 @@ static inline void mei_hw_config(struct mei_device *dev)
{
dev->ops->hw_config(dev);
}
static inline bool mei_pg_is_enabled(struct mei_device *dev)
{
return dev->ops->pg_is_enabled(dev);
}
static inline int mei_hw_reset(struct mei_device *dev, bool enable)
{
return dev->ops->hw_reset(dev, enable);