Merge tag 'gpio-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Here are a few GPIO fixes for v4.8.

  I was expecting some fallout from the new chardev rework but nothing
  like that turned up att all.  Instead a Kconfig confusion that I think
  I have finally nailed, then some ordinary driver noise and trivia.

  This fixes a Kconfig issue with UM: when I made GPIOLIB available to
  all archs, that included UM, but the OF part of GPIOLIB requires
  HAS_IOMEM, so we add HAS_IOMEM as a dependency to OF_GPIO.

  This in turn exposed the fact that a few GPIO drivers were implicitly
  assuming OF_GPIO as their dependency but instead depended on OF alone
  (the typical problem being a pointer inside gpio_chip not existing
  unless OF_GPIO is selected) and then UM would fail to compile with
  these drivers instead.  Then I lost patience and made any GPIO driver
  depending on just OF depend on OF_GPIO instead, that is certainly what
  they meant and the only thing that makes sense anyway.  GPIO with just
  OF but !OF_GPIO does not make sense.

  Also a fix for the max730x driver data pointer, and a minor comment
  fix for the GPIO tools"

* tag 'gpio-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: make any OF dependent driver depend on OF_GPIO
  gpio: Fix OF build problem on UM
  gpio: max730x: set gpiochip data pointer before using it
  tools/gpio: fix gpio-event-mon header comment

3 files changed, 11 insertions, 10 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 98dd47a30fc7..66a94103798b 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -50,6 +50,7 @@ config GPIO_DEVRES
 config OF_GPIO
         def_bool y
         depends on OF
+        depends on HAS_IOMEM
 
 config GPIO_ACPI
         def_bool y
@@ -188,7 +189,7 @@ config GPIO_EP93XX
 config GPIO_ETRAXFS
         bool "Axis ETRAX FS General I/O"
         depends on CRIS || COMPILE_TEST
-        depends on OF
+        depends on OF_GPIO
         select GPIO_GENERIC
         select GPIOLIB_IRQCHIP
         help
@@ -214,7 +215,7 @@ config GPIO_GENERIC_PLATFORM
 
 config GPIO_GRGPIO
         tristate "Aeroflex Gaisler GRGPIO support"
-        depends on OF
+        depends on OF_GPIO
         select GPIO_GENERIC
         select IRQ_DOMAIN
         help
@@ -312,7 +313,7 @@ config GPIO_MPC8XXX
 config GPIO_MVEBU
         def_bool y
         depends on PLAT_ORION
-        depends on OF
+        depends on OF_GPIO
         select GENERIC_IRQ_CHIP
 
 config GPIO_MXC
@@ -405,7 +406,7 @@ config GPIO_TEGRA
         bool "NVIDIA Tegra GPIO support"
         default ARCH_TEGRA
         depends on ARCH_TEGRA || COMPILE_TEST
-        depends on OF
+        depends on OF_GPIO
         help
           Say yes here to support GPIO pins on NVIDIA Tegra SoCs.
 
@@ -1099,7 +1100,7 @@ menu "SPI GPIO expanders"
 
 config GPIO_74X164
         tristate "74x164 serial-in/parallel-out 8-bits shift register"
-        depends on OF
+        depends on OF_GPIO
         help
           Driver for 74x164 compatible serial-in/parallel-out 8-outputs
           shift registers. This driver can be used to provide access
diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c
index 08807368f007..946d09195598 100644
--- a/drivers/gpio/gpio-max730x.c
+++ b/drivers/gpio/gpio-max730x.c
@@ -192,6 +192,10 @@ int __max730x_probe(struct max7301 *ts)
         ts->chip.parent = dev;
         ts->chip.owner = THIS_MODULE;
 
+        ret = gpiochip_add_data(&ts->chip, ts);
+        if (ret)
+                goto exit_destroy;
+
         /*
          * initialize pullups according to platform data and cache the
          * register values for later use.
@@ -213,10 +217,6 @@ int __max730x_probe(struct max7301 *ts)
                 }
         }
 
-        ret = gpiochip_add_data(&ts->chip, ts);
-        if (ret)
-                goto exit_destroy;
-
         return ret;
 
 exit_destroy:
diff --git a/tools/gpio/gpio-event-mon.c b/tools/gpio/gpio-event-mon.c
index 448ed96b3b4f..1c14c2595158 100644
--- a/tools/gpio/gpio-event-mon.c
+++ b/tools/gpio/gpio-event-mon.c
@@ -1,5 +1,5 @@
 /*
- * gpio-hammer - example swiss army knife to shake GPIO lines on a system
+ * gpio-event-mon - monitor GPIO line events from userspace
  *
  * Copyright (C) 2016 Linus Walleij
  *