[RFC PATCH 11/15] spi: tegra114: use `spi_transfer_delay` helper

[Alexandru Ardelean]

The tegra114 driver has a weird/separate `tegra_spi_transfer_delay()`
function that does 2 delays: one mdelay() and one udelay().

This was introduced via commit f4fade12d506e14867a2b0a5e2f7aaf227297d8b
("spi/tegra114: Correct support for cs_change").

There doesn't seem to be a mention in that commit message to suggest a
specific need/use-case for having the 2 delay calls.
For the most part, udelay() should be sufficient.

This change replaces it with the new `spi_transfer_delay()`, which should
do the same thing.

Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
 drivers/spi/spi-tegra114.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index 39374c2edcf3..5ac2ceb234fc 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -984,17 +984,6 @@ static int tegra_spi_setup(struct spi_device *spi)
        return 0;
 }
 
-static void tegra_spi_transfer_delay(int delay)
-{
-       if (!delay)
-               return;
-
-       if (delay >= 1000)
-               mdelay(delay / 1000);
-
-       udelay(delay % 1000);
-}
-
 static void tegra_spi_transfer_end(struct spi_device *spi)
 {
        struct tegra_spi_data *tspi = spi_master_get_devdata(spi->master);
@@ -1098,7 +1087,7 @@ static int tegra_spi_transfer_one_message(struct 
spi_master *master,
 complete_xfer:
                if (ret < 0 || skip) {
                        tegra_spi_transfer_end(spi);
-                       tegra_spi_transfer_delay(xfer->delay_usecs);
+                       spi_transfer_delay(xfer);
                        goto exit;
                } else if (list_is_last(&xfer->transfer_list,
                                        &msg->transfers)) {
@@ -1106,11 +1095,11 @@ static int tegra_spi_transfer_one_message(struct 
spi_master *master,
                                tspi->cs_control = spi;
                        else {
                                tegra_spi_transfer_end(spi);
-                               tegra_spi_transfer_delay(xfer->delay_usecs);
+                               spi_transfer_delay(xfer);
                        }
                } else if (xfer->cs_change) {
                        tegra_spi_transfer_end(spi);
-                       tegra_spi_transfer_delay(xfer->delay_usecs);
+                       spi_transfer_delay(xfer);
                }
 
        }
-- 
2.20.1