releases/4.19.45/crypto-ccree-pm-resume-first-enable-the-source-clk.patch

   1 From 7766dd774d80463cec7b81d90c8672af91de2da1 Mon Sep 17 00:00:00 2001
   2 From: Ofir Drang <ofir.drang@arm.com>
   3 Date: Thu, 18 Apr 2019 16:39:06 +0300
   4 Subject: crypto: ccree - pm resume first enable the source clk
   5
   6 From: Ofir Drang <ofir.drang@arm.com>
   7
   8 commit 7766dd774d80463cec7b81d90c8672af91de2da1 upstream.
   9
  10 On power management resume function first enable the device clk source
  11 to allow access to the device registers.
  12
  13 Signed-off-by: Ofir Drang <ofir.drang@arm.com>
  14 Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
  15 Cc: stable@vger.kernel.org # v4.19+
  16 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18
  19 ---
  20  drivers/crypto/ccree/cc_pm.c |    5 +++--
  21  1 file changed, 3 insertions(+), 2 deletions(-)
  22
  23 --- a/drivers/crypto/ccree/cc_pm.c
  24 +++ b/drivers/crypto/ccree/cc_pm.c
  25 @@ -42,14 +42,15 @@ int cc_pm_resume(struct device *dev)
  26         struct cc_drvdata *drvdata = dev_get_drvdata(dev);
  27
  28         dev_dbg(dev, "unset HOST_POWER_DOWN_EN\n");
  29 -       cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
  30 -
  31 +       /* Enables the device source clk */
  32         rc = cc_clk_on(drvdata);
  33         if (rc) {
  34                 dev_err(dev, "failed getting clock back on. We're toast.\n");
  35                 return rc;
  36         }
  37
  38 +       cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
  39 +
  40         rc = init_cc_regs(drvdata, false);
  41         if (rc) {
  42                 dev_err(dev, "init_cc_regs (%x)\n", rc);