[ARM] locomo: allow cascaded IRQ base to be specified by platforms
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/common/locomo.c b/arch/arm/common/locomo.c
index d8a1261..90ae00b 100644
--- a/arch/arm/common/locomo.c
+++ b/arch/arm/common/locomo.c
@@ -32,6 +32,12 @@
#include <asm/hardware/locomo.h>
+/* LoCoMo Interrupts */
+#define IRQ_LOCOMO_KEY (0)
+#define IRQ_LOCOMO_GPIO (1)
+#define IRQ_LOCOMO_LT (2)
+#define IRQ_LOCOMO_SPI (3)
+
/* M62332 output channel selection */
#define M62332_EVR_CH 1 /* M62332 volume channel number */
/* 0 : CH.1 , 1 : CH. 2 */
@@ -58,6 +64,7 @@
struct device *dev;
unsigned long phys;
unsigned int irq;
+ int irq_base;
spinlock_t lock;
void __iomem *base;
#ifdef CONFIG_PM
@@ -81,9 +88,7 @@
static struct locomo_dev_info locomo_devices[] = {
{
.devid = LOCOMO_DEVID_KEYBOARD,
- .irq = {
- IRQ_LOCOMO_KEY,
- },
+ .irq = { IRQ_LOCOMO_KEY },
.name = "locomo-keyboard",
.offset = LOCOMO_KEYBOARD,
.length = 16,
@@ -135,18 +140,18 @@
static void locomo_handler(unsigned int irq, struct irq_desc *desc)
{
+ struct locomo *lchip = get_irq_chip_data(irq);
int req, i;
- void __iomem *mapbase = get_irq_chip_data(irq);
/* Acknowledge the parent IRQ */
desc->chip->ack(irq);
/* check why this interrupt was generated */
- req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
+ req = locomo_readl(lchip->base + LOCOMO_ICR) & 0x0f00;
if (req) {
/* generate the next interrupt(s) */
- irq = IRQ_LOCOMO_KEY;
+ irq = lchip->irq_base;
for (i = 0; i <= 3; i++, irq++) {
if (req & (0x0100 << i)) {
generic_handle_irq(irq);
@@ -162,20 +167,20 @@
static void locomo_mask_irq(unsigned int irq)
{
- void __iomem *mapbase = get_irq_chip_data(irq);
+ struct locomo *lchip = get_irq_chip_data(irq);
unsigned int r;
- r = locomo_readl(mapbase + LOCOMO_ICR);
- r &= ~(0x0010 << (irq - IRQ_LOCOMO_KEY));
- locomo_writel(r, mapbase + LOCOMO_ICR);
+ r = locomo_readl(lchip->base + LOCOMO_ICR);
+ r &= ~(0x0010 << (irq - lchip->irq_base));
+ locomo_writel(r, lchip->base + LOCOMO_ICR);
}
static void locomo_unmask_irq(unsigned int irq)
{
- void __iomem *mapbase = get_irq_chip_data(irq);
+ struct locomo *lchip = get_irq_chip_data(irq);
unsigned int r;
- r = locomo_readl(mapbase + LOCOMO_ICR);
- r |= (0x0010 << (irq - IRQ_LOCOMO_KEY));
- locomo_writel(r, mapbase + LOCOMO_ICR);
+ r = locomo_readl(lchip->base + LOCOMO_ICR);
+ r |= (0x0010 << (irq - lchip->irq_base));
+ locomo_writel(r, lchip->base + LOCOMO_ICR);
}
static struct irq_chip locomo_chip = {
@@ -187,21 +192,20 @@
static void locomo_setup_irq(struct locomo *lchip)
{
- int irq;
- void __iomem *irqbase = lchip->base;
+ int irq = lchip->irq_base;
/*
* Install handler for IRQ_LOCOMO_HW.
*/
set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
- set_irq_chip_data(lchip->irq, irqbase);
+ set_irq_chip_data(lchip->irq, lchip);
set_irq_chained_handler(lchip->irq, locomo_handler);
- /* install handlers for IRQ_LOCOMO_* */
- for (irq = IRQ_LOCOMO_KEY; irq < IRQ_LOCOMO_KEY + 4; irq++) {
+ /* Install handlers for IRQ_LOCOMO_* */
+ for ( ; irq <= lchip->irq_base + 3; irq++) {
set_irq_chip(irq, &locomo_chip);
- set_irq_chip_data(irq, irqbase);
- set_irq_handler(irq, handle_edge_irq);
+ set_irq_chip_data(irq, lchip);
+ set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
}
@@ -248,7 +252,8 @@
dev->mapbase = 0;
dev->length = info->length;
- memmove(dev->irq, info->irq, sizeof(dev->irq));
+ dev->irq[0] = (lchip->irq_base == NO_IRQ) ?
+ NO_IRQ : lchip->irq_base + info->irq[0];
ret = device_register(&dev->dev);
if (ret) {
@@ -365,6 +370,7 @@
static int
__locomo_probe(struct device *me, struct resource *mem, int irq)
{
+ struct locomo_platform_data *pdata = me->platform_data;
struct locomo *lchip;
unsigned long r;
int i, ret = -ENODEV;
@@ -380,6 +386,7 @@
lchip->phys = mem->start;
lchip->irq = irq;
+ lchip->irq_base = (pdata) ? pdata->irq_base : NO_IRQ;
/*
* Map the whole region. This also maps the
@@ -446,7 +453,7 @@
* The interrupt controller must be initialised before any
* other device to ensure that the interrupts are available.
*/
- if (lchip->irq != NO_IRQ)
+ if (lchip->irq != NO_IRQ && lchip->irq_base != NO_IRQ)
locomo_setup_irq(lchip);
for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)