openwrtv4/target/linux/generic/patches-4.4/106-spi-use-gpio_set_value_cansleep-for-setting-chipsele.patch
Felix Fietkau 5f9e367127 kernel: spi: allow setting chipselect gpio to sleep
Fixes issues on some ar71xx MikroTik RouterBoard devices

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2017-01-05 11:09:13 +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
@@ -674,7 +674,7 @@ 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);
}