releases/5.0.18/crypto-ccree-host_power_down_en-should-be-the-last-cc-access-during-suspend.patch

   1 From 3499efbeed39d114873267683b9e776bcb34b058 Mon Sep 17 00:00:00 2001
   2 From: Ofir Drang <ofir.drang@arm.com>
   3 Date: Thu, 18 Apr 2019 16:39:08 +0300
   4 Subject: crypto: ccree - HOST_POWER_DOWN_EN should be the last CC access during suspend
   5
   6 From: Ofir Drang <ofir.drang@arm.com>
   7
   8 commit 3499efbeed39d114873267683b9e776bcb34b058 upstream.
   9
  10 During power management suspend the driver need to prepare the device
  11 for the power down operation and as a last indication write to the
  12 HOST_POWER_DOWN_EN register which signals to the hardware that
  13 The ccree is ready for power down.
  14
  15 Signed-off-by: Ofir Drang <ofir.drang@arm.com>
  16 Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
  17 Cc: stable@vger.kernel.org # v4.19+
  18 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
  19 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  20
  21 ---
  22  drivers/crypto/ccree/cc_pm.c |    2 +-
  23  1 file changed, 1 insertion(+), 1 deletion(-)
  24
  25 --- a/drivers/crypto/ccree/cc_pm.c
  26 +++ b/drivers/crypto/ccree/cc_pm.c
  27 @@ -25,13 +25,13 @@ int cc_pm_suspend(struct device *dev)
  28         int rc;
  29
  30         dev_dbg(dev, "set HOST_POWER_DOWN_EN\n");
  31 -       cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
  32         rc = cc_suspend_req_queue(drvdata);
  33         if (rc) {
  34                 dev_err(dev, "cc_suspend_req_queue (%x)\n", rc);
  35                 return rc;
  36         }
  37         fini_cc_regs(drvdata);
  38 +       cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
  39         cc_clk_off(drvdata);
  40         return 0;
  41  }