* [PATCH v4 1/2] dt-bindings: Document mti,mips-cpc binding
2018-01-19 15:40 [PATCH v4 0/2] MIPS: Augment CPC support Aleksandar Markovic
@ 2018-01-19 15:40 ` Aleksandar Markovic
2018-01-19 15:40 ` [PATCH v4 2/2] MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base() Aleksandar Markovic
2018-02-08 14:19 ` [PATCH v4 0/2] MIPS: Augment CPC support James Hogan
2 siblings, 0 replies; 4+ messages in thread
From: Aleksandar Markovic @ 2018-01-19 15:40 UTC (permalink / raw)
To: linux-mips
Cc: Paul Burton, Aleksandar Markovic, David S. Miller, devicetree,
Douglas Leung, Goran Ferenc, Greg Kroah-Hartman, James Hogan,
Linus Walleij, linux-kernel, Mark Rutland, Mauro Carvalho Chehab,
Miodrag Dinic, Petar Jovanovic, Raghu Gandham, Randy Dunlap,
Rob Herring
From: Paul Burton <paul.burton@mips.com>
Document a binding for the MIPS Cluster Power Controller (CPC) that
allows the device tree to specify where the CPC registers are located.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@mips.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Documentation/devicetree/bindings/power/mti,mips-cpc.txt | 8 ++++++++
MAINTAINERS | 1 +
2 files changed, 9 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/mti,mips-cpc.txt
diff --git a/Documentation/devicetree/bindings/power/mti,mips-cpc.txt b/Documentation/devicetree/bindings/power/mti,mips-cpc.txt
new file mode 100644
index 0000000..c6b8251
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/mti,mips-cpc.txt
@@ -0,0 +1,8 @@
+Binding for MIPS Cluster Power Controller (CPC).
+
+This binding allows a system to specify where the CPC registers are
+located.
+
+Required properties:
+compatible : Should be "mti,mips-cpc".
+regs: Should describe the address & size of the CPC register region.
diff --git a/MAINTAINERS b/MAINTAINERS
index 1899480..cca71b8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9108,6 +9108,7 @@ MIPS GENERIC PLATFORM
M: Paul Burton <paul.burton@mips.com>
L: linux-mips@linux-mips.org
S: Supported
+F: Documentation/devicetree/bindings/power/mti,mips-cpc.txt
F: arch/mips/generic/
F: arch/mips/tools/generic-board-config.sh
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v4 2/2] MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()
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
2018-02-08 14:19 ` [PATCH v4 0/2] MIPS: Augment CPC support James Hogan
2 siblings, 0 replies; 4+ messages in thread
From: Aleksandar Markovic @ 2018-01-19 15:40 UTC (permalink / raw)
To: linux-mips
Cc: Paul Burton, Miodrag Dinic, Aleksandar Markovic, Dengcheng Zhu,
Douglas Leung, Goran Ferenc, James Hogan, James Hogan,
linux-kernel, Matt Redfearn, Petar Jovanovic, Raghu Gandham,
Ralf Baechle
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
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v4 0/2] MIPS: Augment CPC support
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 ` [PATCH v4 2/2] MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base() Aleksandar Markovic
@ 2018-02-08 14:19 ` James Hogan
2 siblings, 0 replies; 4+ messages in thread
From: James Hogan @ 2018-02-08 14:19 UTC (permalink / raw)
To: Aleksandar Markovic
Cc: linux-mips, Aleksandar Markovic, Dengcheng Zhu, Douglas Leung,
Goran Ferenc, linux-kernel, Matt Redfearn, Miodrag Dinic,
Paul Burton, Petar Jovanovic, Raghu Gandham, Ralf Baechle,
Thomas Gleixner
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On Fri, Jan 19, 2018 at 04:40:47PM +0100, Aleksandar Markovic wrote:
> From: Aleksandar Markovic <aleksandar.markovic@mips.com>
>
> v3->v4:
>
> - documentation patch now contains updating of MAINTAINERS file
> - rebased to the latest code
Thanks, I've applied with the intention of squeezing into 4.16 (I
presume this is important for Ranchu).
Cheers
James
>
> v2->v3:
>
> - changed documentation file location from
> devicetree/bindings/misc to devicetree/bindings/power
> - minor commit message improvements
> - rebased to the latest code
>
> v1->v2:
>
> - corrected wording in commit messages and documentation text
> - expanded cover letter to better explain the context of proposed
> changes
> - rebased to the latest code
>
> This series is based on two patches from the larger series submitted
> some time ago (30 Aug 2016):
>
> https://www.linux-mips.org/archives/linux-mips/2016-08/msg00456.html
>
> Both patches deal with MIPS Cluster Power Controller (CPC) support.
> More specifically, they add device tree related functionalities to
> that support.
>
> This functionality is needed for further development of kernel support
> for generic-based MIPS platforms that must be DT-based and will at the
> same time make more extensive use of CPC.
>
> This series is reviewed by the original author of the above-mentioned
> larger series:
>
> Reviewed-by: Paul Burton <paul.burton@mips.com>
>
> Paul Burton (2):
> dt-bindings: Document mti,mips-cpc binding
> MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()
>
> Documentation/devicetree/bindings/power/mti,mips-cpc.txt | 8 ++++++++
> MAINTAINERS | 1 +
> arch/mips/kernel/mips-cpc.c | 13 +++++++++++++
> 3 files changed, 22 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/power/mti,mips-cpc.txt
>
> --
> 2.7.4
>
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