gpio: add driver for SAMA5D2 PIOBU pins

PIOBU pins do not lose their voltage during Backup/Self-refresh.
This patch adds a simple GPIO controller for them and a
maintainer for the driver.

This driver adds support for using the pins as GPIO
offering the possibility to read/set the voltage.

Signed-off-by: Andrei Stefanescu <andrei.stefanescu@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 65828b79ae49..79979ca0edd4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9768,6 +9768,12 @@ M:	Nicolas Ferre <nicolas.ferre@microchip.com>
 S:      Supported
 F:      drivers/power/reset/at91-sama5d2_shdwc.c
 
+MICROCHIP SAMA5D2-COMPATIBLE PIOBU GPIO
+M:      Andrei Stefanescu <andrei.stefanescu@microchip.com>
+L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L:      linux-gpio@vger.kernel.org
+F:      drivers/gpio/gpio-sama5d2-piobu.c
+
 MICROCHIP SPI DRIVER
 M:      Nicolas Ferre <nicolas.ferre@microchip.com>
 S:      Supported