Unverified Commit 791412da authored Jan 19, 2018 by Paul Burton Committed by James Hogan Feb 08, 2018

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>
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>

parent aece34cd

arch/mips/kernel/mips-cpc.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -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 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;
		}

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