| From 791412dafbbfd860e78983d45cf71db603a82f67 Mon Sep 17 00:00:00 2001 |
| From: Paul Burton <paul.burton@mips.com> |
| Date: Fri, 19 Jan 2018 16:40:49 +0100 |
| Subject: MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base() |
| |
| From: Paul Burton <paul.burton@mips.com> |
| |
| commit 791412dafbbfd860e78983d45cf71db603a82f67 upstream. |
| |
| 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> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| arch/mips/kernel/mips-cpc.c | 13 +++++++++++++ |
| 1 file changed, 13 insertions(+) |
| |
| --- 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-cps.h> |
| @@ -22,6 +24,17 @@ static DEFINE_PER_CPU_ALIGNED(unsigned l |
| |
| 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; |
| } |
| |