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spi: tegra114: use `spi_transfer_delay_exec` helper 

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 f4fade12d5
("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_exec()`, which
should do the same thing.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-11-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Alexandru Ardelean 2019-09-26 13:51:38 +03:00 committed by Mark Brown
parent bebcfd272d
commit cd13152bce
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 14 deletions
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17
drivers/spi/spi-tegra114.c
View File

@ -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_exec(xfer);
goto exit;
} else if (list_is_last(&xfer->transfer_list,
&msg->transfers)) {
@ -1106,11 +1095,11 @@ complete_xfer:
tspi->cs_control = spi;
else {
tegra_spi_transfer_end(spi);
tegra_spi_transfer_delay(xfer->delay_usecs);
spi_transfer_delay_exec(xfer);
}
} else if (xfer->cs_change) {
tegra_spi_transfer_end(spi);
tegra_spi_transfer_delay(xfer->delay_usecs);
spi_transfer_delay_exec(xfer);
}
}