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>
diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index e8501db..d868383 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 @@
#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 @@
{
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 @@
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 @@
}
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 @@
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 @@
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;
}