linux-kernel - [PATCH] iio: adc: mcp320x: Use new structure for SPI transfer delays

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Date:   Thu, 27 Feb 2020 14:29:40 +0200
From:   Sergiu Cuciurean <sergiu.cuciurean@...log.com>
To:     <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <jic23@...nel.org>, <gregkh@...uxfoundation.org>
CC:     <knaack.h@....de>, <lars@...afoo.de>, <pmeerw@...erw.net>,
        <info@...ux.net>, <lukas@...ner.de>, <tglx@...utronix.de>,
        Sergiu Cuciurean <sergiu.cuciurean@...log.com>
Subject: [PATCH] iio: adc: mcp320x: Use new structure for SPI transfer delays

In a recent change to the SPI subsystem [1], a new `delay` struct was added
to replace the `delay_usecs`. This change replaces the current
`delay_usecs` with `delay` for this driver.

The `spi_transfer_delay_exec()` function [in the SPI framework] makes sure
that both `delay_usecs` & `delay` are used (in this order to preserve
backwards compatibility).

[1] commit bebcfd272df6 ("spi: introduce `delay` field for
`spi_transfer` + spi_transfer_delay_exec()")

Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@...log.com>
---
 drivers/iio/adc/mcp320x.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
index 465c7625a55a..2c0eb5de110c 100644
--- a/drivers/iio/adc/mcp320x.c
+++ b/drivers/iio/adc/mcp320x.c
@@ -421,7 +421,8 @@ static int mcp320x_probe(struct spi_device *spi)
 			adc->transfer[1].len++;
 
 		/* conversions are started by asserting CS pin for 8 usec */
-		adc->start_conv_transfer.delay_usecs = 8;
+		adc->start_conv_transfer.delay.value = 8;
+		adc->start_conv_transfer.delay.unit = SPI_DELAY_UNIT_USECS;
 		spi_message_init_with_transfers(&adc->start_conv_msg,
 						&adc->start_conv_transfer, 1);
 
-- 
2.17.1