linux-kernel - [PATCH v2 09/12] mtd: nand: denali: use upper/lower_32

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Date:   Fri, 22 Sep 2017 12:46:46 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-mtd@...ts.infradead.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-kernel@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Brian Norris <computersforpeace@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>
Subject: [PATCH v2 09/12] mtd: nand: denali: use upper/lower_32_bits() macro for clean-up

I used (uint64_t) cast to avoid "right shift count >= width of type"
warning.  <linux/kernel.h> provides nice helpers to cater to it.
The code will be cleaner, and easier to understand.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

Changes in v2:
  - Newly added

 drivers/mtd/nand/denali.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 02ce310..e567ad9 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -469,10 +469,10 @@ static void denali_setup_dma64(struct denali_nand_info *denali,
 			  0x01002000 | (64 << 16) | (write << 8) | page_count);
 
 	/* 2. set memory low address */
-	denali_host_write(denali, mode, dma_addr);
+	denali_host_write(denali, mode, lower_32_bits(dma_addr));
 
 	/* 3. set memory high address */
-	denali_host_write(denali, mode, (uint64_t)dma_addr >> 32);
+	denali_host_write(denali, mode, upper_32_bits(dma_addr));
 }
 
 static void denali_setup_dma32(struct denali_nand_info *denali,
-- 
2.7.4