gpio: Add Spreadtrum EIC driver support
The Spreadtrum digital-chip EIC controller has 4 sub-modules: debounce EIC,
latch EIC, async EIC and sync EIC, and each sub-module can has multiple
banks and each bank contains 8 EICs.
Each EIC can only be used as input mode, and has the capability to trigger
interrupts when detecting input signals.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 6b1ee11..380aa90 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -170,6 +170,14 @@
Say Y or M here to build support for the Synopsys DesignWare APB
GPIO block.
+config GPIO_EIC_SPRD
+ tristate "Spreadtrum EIC support"
+ depends on ARCH_SPRD || COMPILE_TEST
+ depends on OF_GPIO
+ select GPIOLIB_IRQCHIP
+ help
+ Say yes here to support Spreadtrum EIC device.
+
config GPIO_EM
tristate "Emma Mobile GPIO"
depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO