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authorArnd Bergmann <arnd@arndb.de>2013-04-10 15:17:47 +0200
committerArnd Bergmann <arnd@arndb.de>2013-04-19 23:00:40 +0200
commit6761dcfe8c42b55076753bc8bea7b5dcbfb445c0 (patch)
tree1fff09aea689b937c15ac5f6178d173ac3f062c5 /drivers/irqchip/exynos-combiner.c
parent30269ddff13f417677a27e37086c97a57f1cf2da (diff)
downloadlinux-6761dcfe8c42b55076753bc8bea7b5dcbfb445c0.tar.bz2
irqchip: exynos: pass max combiner number to combiner_init
We can find out the number of combined IRQs from the device tree, but in case of ATAGS boot, the driver currently uses hardcoded values based on the SoC type. We can't do that in general for a multiplatform kernel, so let's instead pass this information from platform code directly in case of ATAGS boot. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/irqchip/exynos-combiner.c')
-rw-r--r--drivers/irqchip/exynos-combiner.c46
1 files changed, 16 insertions, 30 deletions
diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index e8501dbaa0b7..d8683836ee1e 100644
--- a/drivers/irqchip/exynos-combiner.c
+++ b/drivers/irqchip/exynos-combiner.c
@@ -25,6 +25,8 @@
#define COMBINER_ENABLE_CLEAR 0x4
#define COMBINER_INT_STATUS 0xC
+#define IRQ_IN_COMBINER 8
+
static DEFINE_SPINLOCK(irq_controller_lock);
struct combiner_chip_data {
@@ -112,23 +114,9 @@ static struct irq_chip combiner_chip = {
#endif
};
-static unsigned int max_combiner_nr(void)
-{
- if (soc_is_exynos5250())
- return EXYNOS5_MAX_COMBINER_NR;
- else if (soc_is_exynos4412())
- return EXYNOS4412_MAX_COMBINER_NR;
- else if (soc_is_exynos4212())
- return EXYNOS4212_MAX_COMBINER_NR;
- else
- return EXYNOS4210_MAX_COMBINER_NR;
-}
-
static void __init combiner_cascade_irq(unsigned int combiner_nr,
unsigned int irq)
{
- if (combiner_nr >= max_combiner_nr())
- BUG();
if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
BUG();
irq_set_chained_handler(irq, combiner_handle_cascade_irq);
@@ -139,7 +127,7 @@ static void __init combiner_init_one(unsigned int combiner_nr,
{
combiner_data[combiner_nr].base = base;
combiner_data[combiner_nr].irq_offset = irq_find_mapping(
- combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER);
+ combiner_irq_domain, combiner_nr * IRQ_IN_COMBINER);
combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
combiner_data[combiner_nr].parent_irq = irq;
@@ -161,7 +149,7 @@ static int combiner_irq_domain_xlate(struct irq_domain *d,
if (intsize < 2)
return -EINVAL;
- *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1];
+ *out_hwirq = intspec[0] * IRQ_IN_COMBINER + intspec[1];
*out_type = 0;
return 0;
@@ -209,22 +197,13 @@ static unsigned int exynos4x12_combiner_extra_irq(int group)
}
void __init combiner_init(void __iomem *combiner_base,
- struct device_node *np)
+ struct device_node *np,
+ unsigned int max_nr)
{
int i, irq, irq_base;
- unsigned int max_nr, nr_irq;
+ unsigned int nr_irq;
- max_nr = max_combiner_nr();
-
- if (np) {
- if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
- pr_info("%s: number of combiners not specified, "
- "setting default as %d.\n",
- __func__, max_nr);
- }
- }
-
- nr_irq = max_nr * MAX_IRQ_IN_COMBINER;
+ nr_irq = max_nr * IRQ_IN_COMBINER;
irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0);
if (IS_ERR_VALUE(irq_base)) {
@@ -258,6 +237,7 @@ static int __init combiner_of_init(struct device_node *np,
struct device_node *parent)
{
void __iomem *combiner_base;
+ unsigned int max_nr = 20;
combiner_base = of_iomap(np, 0);
if (!combiner_base) {
@@ -265,7 +245,13 @@ static int __init combiner_of_init(struct device_node *np,
return -ENXIO;
}
- combiner_init(combiner_base, np);
+ if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
+ pr_info("%s: number of combiners not specified, "
+ "setting default as %d.\n",
+ __func__, max_nr);
+ }
+
+ combiner_init(combiner_base, np, max_nr);
return 0;
}