powerpc: Implement GPIO driver for simple memory-mapped banks

The driver supports very simple GPIO controllers, that is, when a
controller provides just a 'data' register. Such controllers may be
found in various BCSRs (Board's FPGAs used to control board's
switches, LEDs, chip-selects, Ethernet/USB PHY power, etc).

So far we support only 1-byte GPIO banks. Support for other widths may
be implemented when/if needed.

p.s.
To avoid "made up" compatible entries (like compatible = "simple-gpio"),
boards must call simple_gpiochip_init() to pass the compatible string.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 5afce115ab1f..b33b28a6fe12 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_FSL_PCI)		+= fsl_pci.o $(fsl-msi-obj-y)
 obj-$(CONFIG_FSL_LBC)           += fsl_lbc.o
 obj-$(CONFIG_FSL_GTM)           += fsl_gtm.o
 obj-$(CONFIG_MPC8xxx_GPIO)      += mpc8xxx_gpio.o
+obj-$(CONFIG_SIMPLE_GPIO)       += simple_gpio.o
 obj-$(CONFIG_RAPIDIO)           += fsl_rio.o
 obj-$(CONFIG_TSI108_BRIDGE)     += tsi108_pci.o tsi108_dev.o
 obj-$(CONFIG_QUICC_ENGINE)      += qe_lib/