Patch "MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()" has been added to the 4.15-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mips-cpc-map-registers-using-dt-in-mips_cpc_default_phys_base.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>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;
 }
 


Patches currently in stable-queue which might be from paul.burton@mips.com are

queue-4.15/mips-cpc-map-registers-using-dt-in-mips_cpc_default_phys_base.patch
queue-4.15/dt-bindings-document-mti-mips-cpc-binding.patch