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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-04 09:59:08 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-04 09:59:08 +0900
commit179c96d9f715a619811ded5dcbd35b1fee8caf69 (patch)
tree363b8b1b377eb919cf40ec77da58cb6d0f08dbef /drivers
parenteca94432934fe5f141d084f2e36ee2c0e614cc04 (diff)
parentfbbf145a0e0a0177e089c52275fbfa55763e7d1d (diff)
downloadlinux-179c96d9f715a619811ded5dcbd35b1fee8caf69.tar.bz2
Merge tag 'gpio-v5.2-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fix from Linus Walleij: "A single fixup for the SPI CS gpios that regressed in the current kernel cycle" * tag 'gpio-v5.2-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio/spi: Fix spi-gpio regression on active high CS
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/gpiolib-of.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index aec7bd86ae7e..9c9b965d7d6d 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -118,8 +118,15 @@ static void of_gpio_flags_quirks(struct device_node *np,
* Legacy handling of SPI active high chip select. If we have a
* property named "cs-gpios" we need to inspect the child node
* to determine if the flags should have inverted semantics.
+ *
+ * This does not apply to an SPI device named "spi-gpio", because
+ * these have traditionally obtained their own GPIOs by parsing
+ * the device tree directly and did not respect any "spi-cs-high"
+ * property on the SPI bus children.
*/
- if (IS_ENABLED(CONFIG_SPI_MASTER) && !strcmp(propname, "cs-gpios") &&
+ if (IS_ENABLED(CONFIG_SPI_MASTER) &&
+ !strcmp(propname, "cs-gpios") &&
+ !of_device_is_compatible(np, "spi-gpio") &&
of_property_read_bool(np, "cs-gpios")) {
struct device_node *child;
u32 cs;