mach-ux500: board support for AB8500 GPIO driver

This is the board support patch for ab8500 gpio driver
on mach-ux500.Patch implements 16 virtual
IRQ mapped to 16 interrupt capable AB8500 GPIOs.

Signed-off-by: Bibek Basu <bibek.basu@stericsson.com>
[Modify for header file placement]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

3 files changed, 41 insertions, 2 deletions

diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index d0076453d7ff..6ac0164db6e8 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -22,6 +22,7 @@
 #include <linux/mfd/ab8500.h>
 #include <linux/regulator/ab8500.h>
 #include <linux/mfd/tc3589x.h>
+#include <linux/mfd/ab8500/gpio.h>
 #include <linux/leds-lp5521.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
@@ -42,10 +43,33 @@
 #include "board-mop500.h"
 #include "board-mop500-regulators.h"
 
+static struct ab8500_gpio_platform_data ab8500_gpio_pdata = {
+	.gpio_base		= MOP500_AB8500_GPIO(0),
+	.irq_base		= MOP500_AB8500_VIR_GPIO_IRQ_BASE,
+	/* config_reg is the initial configuration of ab8500 pins.
+	 * The pins can be configured as GPIO or alt functions based
+	 * on value present in GpioSel1 to GpioSel6 and AlternatFunction
+	 * register. This is the array of 7 configuration settings.
+	 * One has to compile time decide these settings. Below is the
+	 * explaination of these setting
+	 * GpioSel1 = 0x00 => Pins GPIO1 to GPIO8 are not used as GPIO
+	 * GpioSel2 = 0x1E => Pins GPIO10 to GPIO13 are configured as GPIO
+	 * GpioSel3 = 0x80 => Pin GPIO24 is configured as GPIO
+	 * GpioSel4 = 0x01 => Pin GPIo25 is configured as GPIO
+	 * GpioSel5 = 0x7A => Pins GPIO34, GPIO36 to GPIO39 are conf as GPIO
+	 * GpioSel6 = 0x00 => Pins GPIO41 & GPIo42 are not configured as GPIO
+	 * AlternaFunction = 0x00 => If Pins GPIO10 to 13 are not configured
+	 * as GPIO then this register selectes the alternate fucntions
+	 */
+	.config_reg		= {0x00, 0x1E, 0x80, 0x01,
+					0x7A, 0x00, 0x00},
+};
+
 static struct ab8500_platform_data ab8500_platdata = {
 	.irq_base	= MOP500_AB8500_IRQ_BASE,
 	.regulator	= ab8500_regulators,
 	.num_regulator	= ARRAY_SIZE(ab8500_regulators),
+	.gpio		= &ab8500_gpio_pdata,
 };
 
 static struct resource ab8500_resources[] = {
diff --git a/arch/arm/mach-ux500/board-mop500.h b/arch/arm/mach-ux500/board-mop500.h
index 56722f4be71b..03a31cc9b084 100644
--- a/arch/arm/mach-ux500/board-mop500.h
+++ b/arch/arm/mach-ux500/board-mop500.h
@@ -27,6 +27,10 @@
 #define GPIO_BU21013_CS			MOP500_EGPIO(13)
 #define GPIO_SDMMC_EN			MOP500_EGPIO(17)
 #define GPIO_SDMMC_1V8_3V_SEL		MOP500_EGPIO(18)
+#define MOP500_EGPIO_END		MOP500_EGPIO(24)
+
+/* GPIOs on the AB8500 mixed-signals circuit */
+#define MOP500_AB8500_GPIO(x)		(MOP500_EGPIO_END + (x))
 
 struct i2c_board_info;
 
diff --git a/arch/arm/mach-ux500/include/mach/irqs-board-mop500.h b/arch/arm/mach-ux500/include/mach/irqs-board-mop500.h
index 7cdeb2af0ebb..97ef55f84934 100644
--- a/arch/arm/mach-ux500/include/mach/irqs-board-mop500.h
+++ b/arch/arm/mach-ux500/include/mach/irqs-board-mop500.h
@@ -35,9 +35,20 @@
 #define MOP500_STMPE1601_IRQBASE        MOP500_EGPIO_IRQ_END
 #define MOP500_STMPE1601_IRQ(x)         (MOP500_STMPE1601_IRQBASE + (x))
 
-#define MOP500_NR_IRQS          MOP500_STMPE1601_IRQ(STMPE_NR_INTERNAL_IRQS)
+#define MOP500_STMPE1601_IRQ_END	\
+	MOP500_STMPE1601_IRQ(STMPE_NR_INTERNAL_IRQS)
 
-#define MOP500_IRQ_END          MOP500_NR_IRQS
+/* AB8500 virtual gpio IRQ */
+#define AB8500_VIR_GPIO_NR_IRQS			16
+
+#define MOP500_AB8500_VIR_GPIO_IRQ_BASE		\
+	MOP500_STMPE1601_IRQ_END
+#define MOP500_AB8500_VIR_GPIO_IRQ_END		\
+	(MOP500_AB8500_VIR_GPIO_IRQ_BASE + AB8500_VIR_GPIO_NR_IRQS)
+
+#define MOP500_NR_IRQS		MOP500_AB8500_VIR_GPIO_IRQ_END
+
+#define MOP500_IRQ_END		MOP500_NR_IRQS
 
 #if MOP500_IRQ_END > IRQ_BOARD_END
 #undef IRQ_BOARD_END