mei: condition PGI support on HW and HBM version
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>
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index f60182a..49f197a 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -280,6 +280,18 @@
}
/**
+ * 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
*
* @dev: the device structure
@@ -1017,6 +1029,8 @@
.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,