Add a GPIO driver for the low-power Powerdown Controller GPIOs in the
TZ1090 SoC.
The driver is instantiated by device tree and supports interrupts for
the SysWake GPIOs only.
Signed-off-by: James Hogan james.ho...@imgtec.com
Cc: Grant Likely grant.lik...@linaro.org
Cc: Rob Herring rob.herr...@calxeda.com
Cc: Rob Landley r...@landley.net
Cc: Linus Walleij linus.wall...@linaro.org
Cc: linux-...@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
---
Changes in v3:
- separated from irq-imgpdc and removed arch/metag changes to allow
these patches to go upstream separately via the pinctrl[/gpio] trees
(particularly the pinctrl drivers depend on the new pinconf DT
bindings).
- some s/unsigned/unsigned int/.
- gpio-tz1090*: refer to dt-bindings/gpio/gpio.h and
dt-bindings/interrupt-controller/irq.h flags in bindings.
- gpio-tz1090*: move initcall from postcore to subsys.
Changes in v2:
- gpio-tz1090-pdc: remove references to Linux flags in dt bindings
- gpio-tz1090-pdc: make use of BIT() from linux/bitops.h
- gpio-tz1090-pdc: make register accessors inline to match pinctrl
- gpio-tz1090-pdc: update gpio-ranges to use 3 cells after recent ABI
breakage
.../devicetree/bindings/gpio/gpio-tz1090-pdc.txt | 43
drivers/gpio/Kconfig | 7 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-tz1090-pdc.c | 243 +
4 files changed, 294 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt
create mode 100644 drivers/gpio/gpio-tz1090-pdc.c
diff --git a/Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt
b/Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt
new file mode 100644
index 000..704a277
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt
@@ -0,0 +1,43 @@
+ImgTec TZ1090 PDC GPIO Controller
+
+Required properties:
+- compatible: Compatible property value should be img,tz1090-pdc-gpio.
+
+- reg: Physical base address of the controller and length of memory mapped
+ region. This starts at and cover the SOC_GPIO_CONTROL registers.
+
+- gpio-controller: Specifies that the node is a gpio controller.
+
+- #gpio-cells: Should be 2. The syntax of the gpio specifier used by client
+ nodes should have the following values.
+ [phandle of the gpio controller node]
+ [PDC gpio number]
+ [gpio flags]
+
+ Values for gpio specifier:
+ - GPIO number: a value in the range 0 to 6.
+ - GPIO flags: bit field of flags, as defined in dt-bindings/gpio/gpio.h.
+Only the following flags are supported:
+ GPIO_ACTIVE_HIGH
+ GPIO_ACTIVE_LOW
+
+Optional properties:
+- gpio-ranges: Mapping to pin controller pins
+
+- interrupts: Individual syswake interrupts (other GPIOs cannot interrupt)
+
+
+Example:
+
+ pdc_gpios: gpio-controller@02006500 {
+ gpio-controller;
+ #gpio-cells = 2;
+
+ compatible = img,tz1090-pdc-gpio;
+ reg = 0x02006500 0x100;
+
+ interrupt-parent = pdc;
+ interrupts =8 IRQ_TYPE_NONE, /* Syswake 0 */
+ 9 IRQ_TYPE_NONE, /* Syswake 1 */
+ 10 IRQ_TYPE_NONE; /* Syswake 2 */
+ };
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ee27c2e..08dbfbe 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -239,6 +239,13 @@ config GPIO_TZ1090
help
Say yes here to support Toumaz Xenif TZ1090 GPIOs.
+config GPIO_TZ1090_PDC
+ bool Toumaz Xenif TZ1090 PDC GPIO support
+ depends on SOC_TZ1090
+ default y
+ help
+ Say yes here to support Toumaz Xenif TZ1090 PDC GPIOs.
+
config GPIO_XILINX
bool Xilinx GPIO support
depends on PPC_OF || MICROBLAZE
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 37bdc1e..44341c7 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_GPIO_TS5500) += gpio-ts5500.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o
obj-$(CONFIG_GPIO_TZ1090) += gpio-tz1090.o
+obj-$(CONFIG_GPIO_TZ1090_PDC) += gpio-tz1090-pdc.o
obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o
obj-$(CONFIG_GPIO_VIPERBOARD) += gpio-viperboard.o
obj-$(CONFIG_GPIO_VR41XX) += gpio-vr41xx.o
diff --git a/drivers/gpio/gpio-tz1090-pdc.c b/drivers/gpio/gpio-tz1090-pdc.c
new file mode 100644
index 000..f512da2
--- /dev/null
+++ b/drivers/gpio/gpio-tz1090-pdc.c
@@ -0,0 +1,243 @@
+/*
+ * Toumaz Xenif TZ1090 PDC GPIO handling.
+ *
+ * Copyright (C) 2012-2013 Imagination Technologies Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include linux/bitops.h
+#include linux/gpio.h
