openwrtv3/target/linux/generic/patches-4.9/131-spi-use-gpio_set_value_cansleep-for-setting-chipsele.patch
Felix Fietkau f791fb4af4 kernel: add linux 4.9 support
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Tim Harvey <tharvey@gateworks.com> [fixes]
2017-02-04 20:28:14 +01:00

21 lines
638 B
Diff

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
@@ -698,7 +698,7 @@ 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);
}