openwrtv3/target/linux/generic/patches-4.9/131-spi-use-gpio_set_value_cansleep-for-setting-chipsele.patch

From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 30 Dec 2016 14:53:45 +0100
Subject: [PATCH] spi: use gpio_set_value_cansleep for setting chipselect GPIO

Sleeping is safe inside spi_transfer_one_message, and some GPIO chips
need to sleep for setting values

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -700,7 +700,7 @@ static void spi_set_cs(struct spi_device
 		enable = !enable;
 
 	if (gpio_is_valid(spi->cs_gpio))
-		gpio_set_value(spi->cs_gpio, !enable);
+		gpio_set_value_cansleep(spi->cs_gpio, !enable);
 	else if (spi->master->set_cs)
 		spi->master->set_cs(spi, !enable);
 }