1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index fced1909cbba..6ec0e35b98e3 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -23,6 +23,21 @@ config DEBUG_GPIO
           slower.  The diagnostics help catch the type of setup errors
           that are most common when setting up new platforms or boards.
 
+config GPIO_SYSFS
+        bool "/sys/class/gpio/... (sysfs interface)"
+        depends on SYSFS && EXPERIMENTAL
+        help
+          Say Y here to add a sysfs interface for GPIOs.
+
+          This is mostly useful to work around omissions in a system's
+          kernel support.  Those are common in custom and semicustom
+          hardware assembled using standard kernels with a minimum of
+          custom patches.  In those cases, userspace code may import
+          a given GPIO from the kernel, if no kernel driver requested it.
+
+          Kernel drivers may also request that a particular GPIO be
+          exported to userspace; this can be useful when debugging.
+
 # put expanders in the right section, in alphabetical order
 
 comment "I2C GPIO expanders:"