linux-kernel - [PATCH 1/3] spi: dw: Convert to using BITS_TO

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Date: Thu, 15 Feb 2024 21:00:46 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: Serge Semin <fancer.lancer@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Andy Shevchenko <andy@...nel.org>,
	linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] spi: dw: Convert to using BITS_TO_BYTES() macro

Since commit dd3e7cba1627 ("ocfs2/dlm: move BITS_TO_BYTES() to bitops.h
for wider use") there is a generic helper available to calculate a number
of bytes needed to accommodate the specified number of bits. Let's use it
instead of the hard-coded DIV_ROUND_UP() macro function.

Signed-off-by: Serge Semin <fancer.lancer@...il.com>
---
 drivers/spi/spi-dw-core.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index 0274c9295514..722b5eb1f709 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/bitops.h>
 #include <linux/dma-mapping.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
@@ -421,10 +422,7 @@ static int dw_spi_transfer_one(struct spi_controller *host,
 	int ret;
 
 	dws->dma_mapped = 0;
-	dws->n_bytes =
-		roundup_pow_of_two(DIV_ROUND_UP(transfer->bits_per_word,
-						BITS_PER_BYTE));
-
+	dws->n_bytes = roundup_pow_of_two(BITS_TO_BYTES(transfer->bits_per_word));
 	dws->tx = (void *)transfer->tx_buf;
 	dws->tx_len = transfer->len / dws->n_bytes;
 	dws->rx = transfer->rx_buf;
-- 
2.43.0