linux-kernel - [PATCH v4 08/16] crypto: caam - use ioread64*_hi_lo in rd

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Date:   Wed,  3 Jul 2019 01:13:19 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-crypto@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Chris Spencer <christopher.spencer@....co.uk>,
        Cory Tusar <cory.tusar@....aero>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Horia Geantă <horia.geanta@....com>,
        Aymen Sghaier <aymen.sghaier@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 08/16] crypto: caam - use ioread64*_hi_lo in rd_reg64

Following the same transformation logic as outlined in previous commit
converting wr_reg64, convert rd_reg64 to use helpers from
<linux/io-64-nonatomic-hi-lo.h> first. No functional change intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: Chris Spencer <christopher.spencer@....co.uk>
Cc: Cory Tusar <cory.tusar@....aero>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Horia Geantă <horia.geanta@....com>
Cc: Aymen Sghaier <aymen.sghaier@....com>
Cc: Leonard Crestez <leonard.crestez@....com>
Cc: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/crypto/caam/regs.h | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 6e8352ac0d92..afdc0d1aa338 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -172,12 +172,20 @@ static inline void wr_reg64(void __iomem *reg, u64 data)
 
 static inline u64 rd_reg64(void __iomem *reg)
 {
-	if (!caam_imx && caam_little_end)
-		return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
-			(u64)rd_reg32((u32 __iomem *)(reg)));
+	if (caam_little_end) {
+		if (caam_imx) {
+			u32 low, high;
 
-	return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
-		(u64)rd_reg32((u32 __iomem *)(reg) + 1));
+			high = ioread32(reg);
+			low  = ioread32(reg + sizeof(u32));
+
+			return low + ((u64)high << 32);
+		} else {
+			return ioread64(reg);
+		}
+	} else {
+		return ioread64be(reg);
+	}
 }
 #endif /* CONFIG_64BIT  */
 
-- 
2.21.0