powerpc/5xxx: extend mpc8xxx_gpio driver to support mpc512x gpios

The GPIO controller of MPC512x is slightly different from
8xxx GPIO controllers. The register interface is the same
except the external interrupt control register. The MPC512x
GPIO controller differentiates between four interrupt event
types and therefore provides two interrupt control registers,
GPICR1 and GPICR2. GPIO[0:15] interrupt event types are
configured in GPICR1 register, GPIO[16:31] - in GPICR2 register.

This patch adds MPC512x speciffic set_type() callback and
updates config file and comments. Additionally the gpio chip
registration function is changed to use for_each_matching_node()
preventing multiple registration if a node claimes compatibility
with another gpio controller type.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 4 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index d1663db7810f..471115a13d1b 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -304,13 +304,14 @@ config OF_RTC
 source "arch/powerpc/sysdev/bestcomm/Kconfig"
 
 config MPC8xxx_GPIO
-        bool "MPC8xxx GPIO support"
-        depends on PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || FSL_SOC_BOOKE || PPC_86xx
+        bool "MPC512x/MPC8xxx GPIO support"
+        depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
+                   FSL_SOC_BOOKE || PPC_86xx
         select GENERIC_GPIO
         select ARCH_REQUIRE_GPIOLIB
         help
           Say Y here if you're going to use hardware that connects to the
-          MPC831x/834x/837x/8572/8610 GPIOs.
+          MPC512x/831x/834x/837x/8572/8610 GPIOs.
 
 config SIMPLE_GPIO
         bool "Support for simple, memory-mapped GPIO controllers"