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| author | Daniel Hellstrom <daniel@gaisler.com> | 2011-01-27 04:26:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-17 04:19:04 +0300 |
| commit | 7279b82cb1975ba4e337a549757f17418cfdffad (patch) | |
| tree | be97311b59bf95471ab2aa6e303e92c9a4427ac9 /arch/sparc/kernel/leon_kernel.c | |
| parent | 684151a75bf25f5aeb8a23010da91a34e17b7353 (diff) | |
| download | linux-7279b82cb1975ba4e337a549757f17418cfdffad.tar.xz | |
SPARC/LEON: power down instruction different of different LEONs
The way a LEON is powered down is implemented differently depending
on CHIP type. The AMBA Plug&Play system ID tells revision of GRLIB
and CHIP.
This is for example needed by the GR-LEON4-ITX board and the UT699.
Previously the power down support for LEON was limited to SMP, now
both SMP and UP systems use the instruction.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
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 | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c index fdab7f854f80..2f8a9a25d10d 100644 --- a/arch/sparc/kernel/leon_kernel.c +++ b/arch/sparc/kernel/leon_kernel.c @@ -30,6 +30,7 @@ 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 amba_system_id; unsigned long leon3_gptimer_irq; /* interrupt controller irq number */ unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */ @@ -117,10 +118,16 @@ void __init leon_init_timers(irq_handler_t counter_fn) master_l10_counter = (unsigned int *)&dummy_master_l10_counter; dummy_master_l10_counter = 0; - /*Find IRQMP IRQ Controller Registers base address otherwise bail out.*/ rootnp = of_find_node_by_path("/ambapp0"); if (!rootnp) goto bad; + + /* Find System ID: GRLIB build ID and optional CHIP ID */ + pp = of_find_property(rootnp, "systemid", &len); + if (pp) + amba_system_id = *(unsigned long *)pp->value; + + /* Find IRQMP IRQ Controller Registers base adr otherwise bail out */ np = of_find_node_by_name(rootnp, "GAISLER_IRQMP"); if (!np) { np = of_find_node_by_name(rootnp, "01_00d"); |