gpio: tc3589x: get rid of static IRQ base

The static IRQ base is not used on any platforms with this chip
(only Ux500). Get rid of it forever, and rely on dynamic IRQ
descriptor allocation.

Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-tc3589x.c

@@ -32,9 +32,6 @@ struct tc3589x_gpio {
 	struct device *dev;
 	struct mutex irq_lock;
 	struct irq_domain *domain;
-
-	int irq_base;
-
 	/* Caches of interrupt control registers for bus_lock */
 	u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS];
 	u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS];
@@ -290,8 +287,6 @@ static struct irq_domain_ops tc3589x_irq_ops = {
 static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio,
 				struct device_node *np)
 {
-	int base = tc3589x_gpio->irq_base;
-
 	/*
 	 * If this results in a linear domain, irq_create_mapping() will
 	 * take care of allocating IRQ descriptors at runtime. When a base
@@ -299,7 +294,7 @@ static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio,
 	 * domain is instantiated.
 	 */
 	tc3589x_gpio->domain = irq_domain_add_simple(np,
-			tc3589x_gpio->chip.ngpio, base, &tc3589x_irq_ops,
+			tc3589x_gpio->chip.ngpio, 0, &tc3589x_irq_ops,
 			tc3589x_gpio);
 	if (!tc3589x_gpio->domain) {
 		dev_err(tc3589x_gpio->dev, "Failed to create irqdomain\n");
@@ -348,9 +343,6 @@ static int tc3589x_gpio_probe(struct platform_device *pdev)
 	tc3589x_gpio->chip.of_node = np;
 #endif
 
-	tc3589x_gpio->irq_base = tc3589x->irq_base ?
-		tc3589x->irq_base + TC3589x_INT_GPIO(0) : 0;
-
 	/* Bring the GPIO module out of reset */
 	ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL,
 			       TC3589x_RSTCTRL_GPIRST, 0);

include/linux/mfd/tc3589x.h

@@ -111,7 +111,6 @@ enum tx3589x_block {
 #define TC3589x_INT_PORIRQ	7
 
 #define TC3589x_NR_INTERNAL_IRQS	8
-#define TC3589x_INT_GPIO(x)	(TC3589x_NR_INTERNAL_IRQS + (x))
 
 struct tc3589x {
 	struct mutex lock;