From 791412dafbbfd860e78983d45cf71db603a82f67 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Fri, 19 Jan 2018 16:40:49 +0100 Subject: 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 Signed-off-by: Miodrag Dinic Signed-off-by: Aleksandar Markovic Cc: linux-mips@linux-mips.org Cc: Ralf Baechle Patchwork: https://patchwork.linux-mips.org/patch/18513/ Signed-off-by: James Hogan --- arch/mips/kernel/mips-cpc.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/mips/kernel') 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 @@ #include #include +#include +#include #include #include @@ -22,6 +24,17 @@ 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; } -- cgit v1.2.3