linux-kernel - [PATCH] input: touchscreen: ad7877: Use new structure for SPI transfer delays

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Date:   Thu, 27 Feb 2020 15:06:19 +0200
From:   Sergiu Cuciurean <sergiu.cuciurean@...log.com>
To:     <linux-kernel@...r.kernel.org>, <linux-input@...r.kernel.org>,
        <dmitry.torokhov@...il.com>, <michael.hennerich@...log.com>
CC:     Sergiu Cuciurean <sergiu.cuciurean@...log.com>
Subject: [PATCH] input: touchscreen: ad7877: 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/input/touchscreen/ad7877.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
index 9b652f61837f..0007aaf5cbd7 100644
--- a/drivers/input/touchscreen/ad7877.c
+++ b/drivers/input/touchscreen/ad7877.c
@@ -281,12 +281,14 @@ static int ad7877_read_adc(struct spi_device *spi, unsigned command)
 
 	req->xfer[1].tx_buf = &req->ref_on;
 	req->xfer[1].len = 2;
-	req->xfer[1].delay_usecs = ts->vref_delay_usecs;
+	req->xfer[1].delay.value = ts->vref_delay_usecs;
+	req->xfer[1].delay.unit = SPI_DELAY_UNIT_USECS;
 	req->xfer[1].cs_change = 1;
 
 	req->xfer[2].tx_buf = &req->command;
 	req->xfer[2].len = 2;
-	req->xfer[2].delay_usecs = ts->vref_delay_usecs;
+	req->xfer[2].delay.value = ts->vref_delay_usecs;
+	req->xfer[2].delay.unit = SPI_DELAY_UNIT_USECS;
 	req->xfer[2].cs_change = 1;
 
 	req->xfer[3].rx_buf = &req->sample;
@@ -716,7 +718,8 @@ static int ad7877_probe(struct spi_device *spi)
 	spin_lock_init(&ts->lock);
 
 	ts->model = pdata->model ? : 7877;
-	ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
+	ts->vref_delay.value = pdata->vref_delay_usecs ? : 100;
+	ts->vref_delay.unit = SPI_DELAY_UNIT_USECS;
 	ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
 	ts->pressure_max = pdata->pressure_max ? : ~0;
 
-- 
2.17.1