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 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-4.14 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-4.14/mips-cpc-map-registers-using-dt-in-mips_cpc_default_phys_base.patch queue-4.14/dt-bindings-document-mti-mips-cpc-binding.patch