crypto: caam - fix ERA retrieval function

SEC ERA has to be retrieved by reading the "fsl,sec-era" property
from the device tree. This property is updated/filled in by
u-boot.

Signed-off-by: Alex Porosanu <alexandru.porosanu@freescale.com>
Reviewed-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 11 insertions, 27 deletions

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 30f434fd5dec..1c38f86bf63a 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -14,7 +14,6 @@
 #include "jr.h"
 #include "desc_constr.h"
 #include "error.h"
-#include "ctrl.h"
 
 /*
  * Descriptor to instantiate RNG State Handle 0 in normal mode and
@@ -352,32 +351,17 @@ static void kick_trng(struct platform_device *pdev, int ent_delay)
 
 /**
  * caam_get_era() - Return the ERA of the SEC on SoC, based
- * on the SEC_VID register.
- * Returns the ERA number (1..4) or -ENOTSUPP if the ERA is unknown.
- * @caam_id - the value of the SEC_VID register
+ * on "sec-era" propery in the DTS. This property is updated by u-boot.
  **/
-int caam_get_era(u64 caam_id)
+int caam_get_era(void)
 {
-        struct sec_vid *sec_vid = (struct sec_vid *)&caam_id;
-        static const struct {
-                u16 ip_id;
-                u8 maj_rev;
-                u8 era;
-        } caam_eras[] = {
-                {0x0A10, 1, 1},
-                {0x0A10, 2, 2},
-                {0x0A12, 1, 3},
-                {0x0A14, 1, 3},
-                {0x0A14, 2, 4},
-                {0x0A16, 1, 4},
-                {0x0A11, 1, 4}
-        };
-        int i;
-
-        for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
-                if (caam_eras[i].ip_id == sec_vid->ip_id &&
-                        caam_eras[i].maj_rev == sec_vid->maj_rev)
-                                return caam_eras[i].era;
+        struct device_node *caam_node;
+        for_each_compatible_node(caam_node, NULL, "fsl,sec-v4.0") {
+                const uint32_t *prop = (uint32_t *)of_get_property(caam_node,
+                                "fsl,sec-era",
+                                NULL);
+                return prop ? *prop : -ENOTSUPP;
+        }
 
         return -ENOTSUPP;
 }
@@ -551,7 +535,7 @@ static int caam_probe(struct platform_device *pdev)
 
         /* Report "alive" for developer to see */
         dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
-                 caam_get_era(caam_id));
+                 caam_get_era());
         dev_info(dev, "job rings = %d, qi = %d\n",
                  ctrlpriv->total_jobrs, ctrlpriv->qi_present);
 
diff --git a/drivers/crypto/caam/ctrl.h b/drivers/crypto/caam/ctrl.h
index 980d44eaaf40..cac5402a46eb 100644
--- a/drivers/crypto/caam/ctrl.h
+++ b/drivers/crypto/caam/ctrl.h
@@ -8,6 +8,6 @@
 #define CTRL_H
 
 /* Prototypes for backend-level services exposed to APIs */
-int caam_get_era(u64 caam_id);
+int caam_get_era(void);
 
 #endif /* CTRL_H */