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authorTomas Winkler <tomas.winkler@intel.com>2014-03-18 22:51:57 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-03 19:20:23 -0400
commitb16c35716b843acdbe562bc0068580c50db203ff (patch)
tree8a0cef597fb7a63b0803305f1690988793310634 /drivers/misc
parentad4d355b4b9764373baaf9e8de6613919e1342fa (diff)
mei: me: add power gating isolation register write wrappers
Add entry and exit power gating isolation register write handler. 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>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/hw-me.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 8dbdaaef1af5..fc5d001983b3 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -431,6 +431,35 @@ static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer,
}
/**
+ * mei_me_pg_enter - write pg enter register to mei device.
+ *
+ * @dev: the device structure
+ */
+static void mei_me_pg_enter(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 reg = mei_me_reg_read(hw, H_HPG_CSR);
+ reg |= H_HPG_CSR_PGI;
+ mei_me_reg_write(hw, H_HPG_CSR, reg);
+}
+
+/**
+ * mei_me_pg_enter - write pg enter register to mei device.
+ *
+ * @dev: the device structure
+ */
+static void mei_me_pg_exit(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 reg = mei_me_reg_read(hw, H_HPG_CSR);
+
+ WARN(!(reg & H_HPG_CSR_PGI), "PGI is not set\n");
+
+ reg |= H_HPG_CSR_PGIHEXR;
+ mei_me_reg_write(hw, H_HPG_CSR, reg);
+}
+
+/**
* mei_me_irq_quick_handler - The ISR of the MEI device
*
* @irq: The irq number