From: Tomas Winkler Date: Tue, 18 Mar 2014 20:51:57 +0000 (+0200) Subject: mei: me: add power gating isolation register write wrappers X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b16c35716b843acdbe562bc0068580c50db203ff;p=deliverable%2Flinux.git mei: me: add power gating isolation register write wrappers Add entry and exit power gating isolation register write handler. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman --- 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 @@ -430,6 +430,35 @@ static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer, return 0; } +/** + * 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 *