crypto: caam - save Era in driver's private data

Save Era in driver's private data for further usage,
like deciding whether an erratum applies or a feature is available
based on its value.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/ctrl.c

@@ -611,6 +611,8 @@ static int caam_probe(struct platform_device *pdev)
 		goto iounmap_ctrl;
 	}
 
+	ctrlpriv->era = caam_get_era();
+
 	ret = of_platform_populate(nprop, caam_match, NULL, dev);
 	if (ret) {
 		dev_err(dev, "JR platform devices creation error\n");
@@ -742,7 +744,7 @@ 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());
+		 ctrlpriv->era);
 	dev_info(dev, "job rings = %d, qi = %d, dpaa2 = %s\n",
 		 ctrlpriv->total_jobrs, ctrlpriv->qi_present,
 		 caam_dpaa2 ? "yes" : "no");

drivers/crypto/caam/intern.h

@@ -84,6 +84,7 @@ struct caam_drv_private {
 	u8 qi_present;		/* Nonzero if QI present in device */
 	int secvio_irq;		/* Security violation interrupt number */
 	int virt_en;		/* Virtualization enabled in CAAM */
+	int era;		/* CAAM Era (internal HW revision) */
 
 #define	RNG4_MAX_HANDLES 2
 	/* RNG4 block */