[PATCH v1 1/1] soft_spi performance enhancement

[verdun]

From: Jean-Marie Verdun <ver...@hpe.com>

Add a test when delay is set to 0 to improve performances
by 20% on ARM based systems

Signed-off-by: Jean-Marie Verdun <ver...@hpe.com>
---
 drivers/spi/soft_spi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/soft_spi.c b/drivers/spi/soft_spi.c
index 50bd7be5640..e97352000f8 100644
--- a/drivers/spi/soft_spi.c
+++ b/drivers/spi/soft_spi.c
@@ -173,7 +173,8 @@ static int soft_spi_xfer(struct udevice *dev, unsigned int 
bitlen,
                        soft_spi_scl(dev, !cidle);
                if ((txrx & SPI_MASTER_NO_TX) == 0)
                        soft_spi_sda(dev, !!(tmpdout & 0x80));
-               udelay(plat->spi_delay_us);
+               if (plat->spi_delay_us)
+                       udelay(plat->spi_delay_us);
 
                /*
                 * sample bit
@@ -190,7 +191,8 @@ static int soft_spi_xfer(struct udevice *dev, unsigned int 
bitlen,
                                                            &plat->mosi :
                                                            &plat->miso);
                tmpdout <<= 1;
-               udelay(plat->spi_delay_us);
+               if (plat->spi_delay_us)
+                       udelay(plat->spi_delay_us);
 
                /*
                 * drive bit
-- 
2.43.0