diff options
| author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2008-12-18 19:37:26 +0300 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2008-12-30 11:13:45 -0600 |
| commit | 3d64de9c50619d32eb71d993d23a50b98d12d3c0 (patch) | |
| tree | c6477e8309eaddf30c64619794e1f44775cd7352 /arch/powerpc/platforms | |
| parent | 94409d6e1088517b6d6c8e669c604cc86d08ac1b (diff) | |
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>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index 47e956c871f..47fe2bea986 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -312,4 +312,15 @@ config MPC8xxx_GPIO Say Y here if you're going to use hardware that connects to the MPC831x/834x/837x/8572/8610 GPIOs. +config SIMPLE_GPIO + bool "Support for simple, memory-mapped GPIO controllers" + depends on PPC + select GENERIC_GPIO + select ARCH_REQUIRE_GPIOLIB + help + Say Y here to support simple, memory-mapped GPIO controllers. + These are usually BCSRs used to control board's switches, LEDs, + chip-selects, Ethernet/USB PHY's power and various other small + on-board peripherals. + endmenu |