3 files changed, 10 insertions, 3 deletions

diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 831a5363f6be..73b98dfbcea4 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -252,6 +252,11 @@ GPIO
   devm_gpiod_get_index_optional()
   devm_gpiod_get_optional()
   devm_gpiod_put()
+  devm_gpiochip_add_data()
+  devm_gpiochip_remove()
+  devm_gpio_request()
+  devm_gpio_request_one()
+  devm_gpio_free()
 
 IIO
   devm_iio_device_alloc()
diff --git a/Documentation/driver-model/platform.txt b/Documentation/driver-model/platform.txt
index e456696cfef2..9d9e47dfc013 100644
--- a/Documentation/driver-model/platform.txt
+++ b/Documentation/driver-model/platform.txt
@@ -75,7 +75,7 @@ If one of the drivers fails to register, all drivers registered up to that
 point will be unregistered in reverse order. Note that there is a convenience
 macro that passes THIS_MODULE as owner parameter:
 
-	#define platform_register_driver(drivers, count)
+	#define platform_register_drivers(drivers, count)
 
 
 Device Enumeration
diff --git a/Documentation/driver-model/porting.txt b/Documentation/driver-model/porting.txt
index 92d86f7271b4..453053f1661f 100644
--- a/Documentation/driver-model/porting.txt
+++ b/Documentation/driver-model/porting.txt
@@ -340,8 +340,10 @@ comparison:
 
   int (*match)(struct device * dev, struct device_driver * drv);
 
-match should return '1' if the driver supports the device, and '0'
-otherwise. 
+match should return positive value if the driver supports the device,
+and zero otherwise. It may also return error code (for example
+-EPROBE_DEFER) if determining that given driver supports the device is
+not possible.
 
 When a device is registered, the bus's list of drivers is iterated
 over. bus->match() is called for each one until a match is found.