iio: imu: adis: use new `delay` 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 bebcfd27 ("spi: introduce `delay` field for
`spi_transfer` + spi_transfer_delay_exec()")
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis.c

@@ -45,7 +45,8 @@ int __adis_write_reg(struct adis *adis, unsigned int reg,
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
-			.delay_usecs = adis->data->write_delay,
+			.delay.value = adis->data->write_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 			.cs_change_delay.value = adis->data->cs_change_delay,
 			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
@@ -53,7 +54,8 @@ int __adis_write_reg(struct adis *adis, unsigned int reg,
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
-			.delay_usecs = adis->data->write_delay,
+			.delay.value = adis->data->write_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 			.cs_change_delay.value = adis->data->cs_change_delay,
 			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
@@ -61,19 +63,22 @@ int __adis_write_reg(struct adis *adis, unsigned int reg,
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
-			.delay_usecs = adis->data->write_delay,
+			.delay.value = adis->data->write_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 			.cs_change_delay.value = adis->data->cs_change_delay,
 			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
 			.tx_buf = adis->tx + 6,
 			.bits_per_word = 8,
 			.len = 2,
-			.delay_usecs = adis->data->write_delay,
+			.delay.value = adis->data->write_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
 			.tx_buf = adis->tx + 8,
 			.bits_per_word = 8,
 			.len = 2,
-			.delay_usecs = adis->data->write_delay,
+			.delay.value = adis->data->write_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 		},
 	};
 
@@ -140,7 +145,8 @@ int __adis_read_reg(struct adis *adis, unsigned int reg,
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
-			.delay_usecs = adis->data->write_delay,
+			.delay.value = adis->data->write_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 			.cs_change_delay.value = adis->data->cs_change_delay,
 			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
@@ -148,7 +154,8 @@ int __adis_read_reg(struct adis *adis, unsigned int reg,
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
-			.delay_usecs = adis->data->read_delay,
+			.delay.value = adis->data->read_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 			.cs_change_delay.value = adis->data->cs_change_delay,
 			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
@@ -157,14 +164,16 @@ int __adis_read_reg(struct adis *adis, unsigned int reg,
 			.bits_per_word = 8,
 			.len = 2,
 			.cs_change = 1,
-			.delay_usecs = adis->data->read_delay,
+			.delay.value = adis->data->read_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 			.cs_change_delay.value = adis->data->cs_change_delay,
 			.cs_change_delay.unit = SPI_DELAY_UNIT_USECS,
 		}, {
 			.rx_buf = adis->rx + 2,
 			.bits_per_word = 8,
 			.len = 2,
-			.delay_usecs = adis->data->read_delay,
+			.delay.value = adis->data->read_delay,
+			.delay.unit = SPI_DELAY_UNIT_USECS,
 		},
 	};