[v6,13/14] crypto: caam - always select job ring via RSR on i.MX8MQ
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Message ID 20190717152458.22337-14-andrew.smirnov@gmail.com
State Changes Requested
Delegated to: Herbert Xu
Headers show
Series
  • crypto: caam - Add i.MX8MQ support
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Commit Message

Andrey Smirnov July 17, 2019, 3:24 p.m. UTC
Per feedback from NXP tech support the way to use register based
service interface on i.MX8MQ is to follow the same set of steps
outlined for the case when virtualization is enabled, regardless if it
is. Current version of SRM for i.MX8MQ speaks of DECO DID_MS and DECO
DID_LS registers, but apparently those are not implemented, so the
case when SCFGR[VIRT_EN]=0 should be handles the same as the case when
SCFGR[VIRT_EN]=1

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Spencer <christopher.spencer@sea.co.uk>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia Geantă <horia.geanta@nxp.com>
Cc: Aymen Sghaier <aymen.sghaier@nxp.com>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/crypto/caam/ctrl.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index b309535f3157..ad6ff4040bab 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -97,7 +97,12 @@  static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
 	int i;
 
 
-	if (ctrlpriv->virt_en == 1) {
+	if (ctrlpriv->virt_en == 1 ||
+	    /*
+	     * Apparently on i.MX8MQ it doesn't matter if virt_en == 1
+	     * and the following steps should be performed regardless
+	     */
+	    of_machine_is_compatible("fsl,imx8mq")) {
 		clrsetbits_32(&ctrl->deco_rsr, 0, DECORSR_JR0);
 
 		while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) &&