diff options
| author | Daniel Hellstrom <daniel@gaisler.com> | 2011-01-04 01:41:29 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-04 11:16:35 -0800 |
| commit | 53aea7caf2e27108912b9b9dbc5bfe18dbbaec9d (patch) | |
| tree | cebe1a8972da0128eedde3c7bdee703a5b5202ec /arch/sparc/kernel/leon_kernel.c | |
| parent | 5f66dd35b49ea81a03e71bfd74c28364f4e32d21 (diff) | |
SPARC/LEON: find IRQCTRL and Timer via OF-Tree, instead of hardcoded.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/leon_kernel.c')
| -rw-r--r-- | arch/sparc/kernel/leon_kernel.c | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c index f01c42661ee..80ba8f51731 100644 --- a/arch/sparc/kernel/leon_kernel.c +++ b/arch/sparc/kernel/leon_kernel.c @@ -23,15 +23,15 @@ #include "prom.h" #include "irq.h" -struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address, initialized by amba_init() */ -struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address, initialized by amba_init() */ +struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */ +struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */ struct amba_apb_device leon_percpu_timer_dev[16]; int leondebug_irq_disable; int leon_debug_irqout; static int dummy_master_l10_counter; -unsigned long leon3_gptimer_irq; /* interrupt controller irq number, initialized by amba_init() */ +unsigned long leon3_gptimer_irq; /* interrupt controller irq number */ unsigned int sparc_leon_eirq; #define LEON_IMASK ((&leon3_irqctrl_regs->mask[0])) @@ -105,13 +105,41 @@ static void leon_disable_irq(unsigned int irq_nr) void __init leon_init_timers(irq_handler_t counter_fn) { int irq; + struct device_node *rootnp, *np; + struct property *pp; + int len; leondebug_irq_disable = 0; leon_debug_irqout = 0; master_l10_counter = (unsigned int *)&dummy_master_l10_counter; dummy_master_l10_counter = 0; - if (leon3_gptimer_regs && leon3_irqctrl_regs) { + /*Find IRQMP IRQ Controller Registers base address otherwise bail out.*/ + rootnp = of_find_node_by_path("/ambapp0"); + if (!rootnp) + goto bad; + np = of_find_node_by_name(rootnp, "GAISLER_IRQMP"); + if (!np) + goto bad; + pp = of_find_property(np, "reg", &len); + if (!pp) + goto bad; + leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value; + + /* Find GPTIMER Timer Registers base address otherwise bail out. */ + np = of_find_node_by_name(rootnp, "GAISLER_GPTIMER"); + if (!np) + goto bad; + pp = of_find_property(np, "reg", &len); + if (!pp) + goto bad; + leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)pp->value; + pp = of_find_property(np, "interrupts", &len); + if (!pp) + goto bad; + leon3_gptimer_irq = *(unsigned int *)pp->value; + + if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) { LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0); LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld, (((1000000 / HZ) - 1))); @@ -133,8 +161,7 @@ void __init leon_init_timers(irq_handler_t counter_fn) # endif } else { - printk(KERN_ERR "No Timer/irqctrl found\n"); - BUG(); + goto bad; } irq = request_irq(leon3_gptimer_irq, @@ -183,6 +210,11 @@ void __init leon_init_timers(irq_handler_t counter_fn) #endif } + return; +bad: + printk(KERN_ERR "No Timer/irqctrl found\n"); + BUG(); + return; } void leon_clear_clock_irq(void) |