diff options
author | Paul Burton <paul.burton@mips.com> | 2018-01-19 10:40:49 -0500 |
---|---|---|
committer | James Hogan <jhogan@kernel.org> | 2018-02-08 09:02:01 -0500 |
commit | 791412dafbbfd860e78983d45cf71db603a82f67 (patch) | |
tree | 0fc152804b6ce53ccb017fdc19c4c5767eaa8f39 | |
parent | aece34cd576c7625181b0488a8129c1e165355f7 (diff) |
MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()
Reading mips_cpc_base value from the DT allows each platform to
define it according to its needs. This is especially convenient
for MIPS_GENERIC kernel where this kind of information should be
determined in runtime.
Use mti,mips-cpc compatible string with just a reg property to
specify the register location for your platform.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Miodrag Dinic <miodrag.dinic@mips.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@mips.com>
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/18513/
Signed-off-by: James Hogan <jhogan@kernel.org>
-rw-r--r-- | arch/mips/kernel/mips-cpc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/kernel/mips-cpc.c b/arch/mips/kernel/mips-cpc.c index 19c88d770054..fcf9af492d60 100644 --- a/arch/mips/kernel/mips-cpc.c +++ b/arch/mips/kernel/mips-cpc.c | |||
@@ -10,6 +10,8 @@ | |||
10 | 10 | ||
11 | #include <linux/errno.h> | 11 | #include <linux/errno.h> |
12 | #include <linux/percpu.h> | 12 | #include <linux/percpu.h> |
13 | #include <linux/of.h> | ||
14 | #include <linux/of_address.h> | ||
13 | #include <linux/spinlock.h> | 15 | #include <linux/spinlock.h> |
14 | 16 | ||
15 | #include <asm/mips-cps.h> | 17 | #include <asm/mips-cps.h> |
@@ -22,6 +24,17 @@ static DEFINE_PER_CPU_ALIGNED(unsigned long, cpc_core_lock_flags); | |||
22 | 24 | ||
23 | phys_addr_t __weak mips_cpc_default_phys_base(void) | 25 | phys_addr_t __weak mips_cpc_default_phys_base(void) |
24 | { | 26 | { |
27 | struct device_node *cpc_node; | ||
28 | struct resource res; | ||
29 | int err; | ||
30 | |||
31 | cpc_node = of_find_compatible_node(of_root, NULL, "mti,mips-cpc"); | ||
32 | if (cpc_node) { | ||
33 | err = of_address_to_resource(cpc_node, 0, &res); | ||
34 | if (!err) | ||
35 | return res.start; | ||
36 | } | ||
37 | |||
25 | return 0; | 38 | return 0; |
26 | } | 39 | } |
27 | 40 | ||