linux-kernel - [PATCH v4 11/19] spi: tegra20-sflash: use to new `spi_transfer_delay

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Message-ID: <20190926105147.7839-12-alexandru.ardelean@analog.com>
Date:   Thu, 26 Sep 2019 13:51:39 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <bcm-kernel-feedback-list@...adcom.com>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-spi@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-tegra@...r.kernel.org>
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: [PATCH v4 11/19] spi: tegra20-sflash: use to new `spi_transfer_delay_exec`

This conversion to the spi_transfer_delay_exec() helper is not
straightforward, as it seems that when a delay is present, the controller
issues a command, and then a delay is followed.

This change adds support for the new `delay` field which is of type
`spi_delay` and keeps backwards compatibility with the old `delay_usecs`
field.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 drivers/spi/spi-tegra20-sflash.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index cd714a4f52c6..ff1933e55830 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -341,10 +341,11 @@ static int tegra_sflash_transfer_one_message(struct spi_master *master,
 			goto exit;
 		}
 		msg->actual_length += xfer->len;
-		if (xfer->cs_change && xfer->delay_usecs) {
+		if (xfer->cs_change &&
+		    (xfer->delay_usecs || xfer->delay.value)) {
 			tegra_sflash_writel(tsd, tsd->def_command_reg,
 					SPI_COMMAND);
-			udelay(xfer->delay_usecs);
+			spi_transfer_delay_exec(xfer);
 		}
 	}
 	ret = 0;
-- 
2.20.1