diff options
| author | Paul Burton <paul.burton@mips.com> | 2018-01-19 16:40:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2018-02-05 08:58:37 -0800 |
| commit | 5bf8bba0f178a4687035494a3ab995548df2e792 (patch) | |
| tree | 7ad6593211e53bea32d3226351ce9d2325bcea64 /arch | |
| parent | 22904b58933d0d2cfe3e9c0014d02a198320a5c9 (diff) | |
FROMLIST: 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>
(cherry picked from: https://patchwork.linux-mips.org/patch/18513/)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'arch')
| -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 b232caf4d53c..3491ee05737c 100644 --- a/arch/mips/kernel/mips-cpc.c +++ b/arch/mips/kernel/mips-cpc.c @@ -10,6 +10,8 @@ #include <linux/errno.h> #include <linux/percpu.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <linux/spinlock.h> #include <asm/mips-cm.h> @@ -23,6 +25,17 @@ static DEFINE_PER_CPU_ALIGNED(unsigned long, cpc_core_lock_flags); phys_addr_t __weak mips_cpc_default_phys_base(void) { + struct device_node *cpc_node; + struct resource res; + int err; + + cpc_node = of_find_compatible_node(of_root, NULL, "mti,mips-cpc"); + if (cpc_node) { + err = of_address_to_resource(cpc_node, 0, &res); + if (!err) + return res.start; + } + return 0; } |