GPIO: add single-register GPIO via CREG driver

Add single-register MMIO GPIO driver for complex cases where
only several fields in register belong to GPIO lines and each GPIO
line owns a field with different length and on/off value.

Such CREG GPIOs are used in Synopsys AXS10x and HSDK boards.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 920c0f92bef4..d2f4b8059adf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14018,6 +14018,12 @@ S:	Supported
 F:      drivers/reset/reset-axs10x.c
 F:      Documentation/devicetree/bindings/reset/snps,axs10x-reset.txt
 
+SYNOPSYS CREG GPIO DRIVER
+M:      Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S:      Maintained
+F:      drivers/gpio/gpio-creg-snps.c
+F:      Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt
+
 SYNOPSYS DESIGNWARE 8250 UART DRIVER
 R:      Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 S:      Maintained