[PATCH 1/3] spi: spi-gpio: actually delay in spidelay()

[Sascha Hauer <s.hauer@pengutronix.de>]

spidelay() currently only is a no-op dummy function. Actually delay in
this function to avoid spi-gpio being faster than specified.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/gpio_spi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/gpio_spi.c b/drivers/spi/gpio_spi.c
index e5664df3fe..a71b4eddab 100644
--- a/drivers/spi/gpio_spi.c
+++ b/drivers/spi/gpio_spi.c
@@ -48,7 +48,10 @@ static inline int getmiso(const struct spi_device *spi)
 	return !!gpio_get_value(priv->data->miso);
 }
 
-#define spidelay(nsecs) do { } while (0)
+static inline void spidelay(unsigned int nsecs)
+{
+	udelay(max(1U, nsecs / 1000));
+}
 
 #include "spi-bitbang-txrx.h"
 

-- 
2.39.5