From: Aleksandar Markovic <aleksandar.markovic@rt-rk.com>
To: linux-mips@linux-mips.org
Cc: Paul Burton <paul.burton@mips.com>,
Miodrag Dinic <miodrag.dinic@mips.com>,
Aleksandar Markovic <aleksandar.markovic@mips.com>,
Dengcheng Zhu <dengcheng.zhu@mips.com>,
Douglas Leung <douglas.leung@mips.com>,
Goran Ferenc <goran.ferenc@mips.com>,
James Hogan <james.hogan@mips.com>,
James Hogan <jhogan@kernel.org>,
linux-kernel@vger.kernel.org,
Matt Redfearn <matt.redfearn@mips.com>,
Petar Jovanovic <petar.jovanovic@mips.com>,
Raghu Gandham <raghu.gandham@mips.com>,
Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH v4 2/2] MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()
Date: Fri, 19 Jan 2018 16:40:49 +0100 [thread overview]
Message-ID: <1516376459-25672-3-git-send-email-aleksandar.markovic@rt-rk.com> (raw)
In-Reply-To: <1516376459-25672-1-git-send-email-aleksandar.markovic@rt-rk.com>
From: Paul Burton <paul.burton@mips.com>
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>
---
arch/mips/kernel/mips-cpc.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/mips/kernel/mips-cpc.c b/arch/mips/kernel/mips-cpc.c
index 19c88d7..fcf9af4 100644
--- 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 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;
}
--
2.7.4
next prev parent reply other threads:[~2018-01-19 15:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-19 15:40 [PATCH v4 0/2] MIPS: Augment CPC support Aleksandar Markovic
2018-01-19 15:40 ` [PATCH v4 1/2] dt-bindings: Document mti,mips-cpc binding Aleksandar Markovic
2018-01-19 15:40 ` Aleksandar Markovic [this message]
2018-02-08 14:19 ` [PATCH v4 0/2] MIPS: Augment CPC support James Hogan
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