linux-kernel - [RFC PATCH 01/15] spi: move `cs_change_delay` backwards compat logic outside switch

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Message-ID: <20190913114550.956-2-alexandru.ardelean@analog.com>
Date:   Fri, 13 Sep 2019 14:45:36 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <linux-spi@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bcm-kernel-feedback-list@...adcom.com>
CC:     <jic23@...nel.org>, <broonie@...nel.org>, <f.fainelli@...il.com>,
        <linus.walleij@...aro.org>, <orsonzhai@...il.com>,
        <baolin.wang@...aro.org>, <zhang.lyra@...il.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [RFC PATCH 01/15] spi: move `cs_change_delay` backwards compat logic outside switch

The `cs_change_delay` backwards compatibility value could be moved outside
of the switch statement.
The only reason to do it, is to make the next patches easier to diff.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 drivers/spi/spi.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 75ac046cae52..c90e02e6d62f 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1114,16 +1114,15 @@ static void _spi_transfer_cs_change_delay(struct spi_message *msg,
 	u32 hz;
 
 	/* return early on "fast" mode - for everything but USECS */
-	if (!delay && unit != SPI_DELAY_UNIT_USECS)
+	if (!delay) {
+		if (unit == SPI_DELAY_UNIT_USECS)
+			_spi_transfer_delay_ns(10000);
 		return;
+	}
 
 	switch (unit) {
 	case SPI_DELAY_UNIT_USECS:
-		/* for compatibility use default of 10us */
-		if (!delay)
-			delay = 10000;
-		else
-			delay *= 1000;
+		delay *= 1000;
 		break;
 	case SPI_DELAY_UNIT_NSECS: /* nothing to do here */
 		break;
-- 
2.20.1