[RFC 1/6] powerpc:/drc Define interface to acquire arch-specific drc info

From: Michael Bringmann <mwb@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman <mpe@ellerman.id.au>,
	Juliet Kim <minkim@us.ibm.com>,
	Tyrel Datwyler <tyreld@linux.vnet.ibm.com>,
	Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Subject: [RFC 1/6] powerpc:/drc Define interface to acquire arch-specific drc info
Date: Fri, 14 Dec 2018 14:50:26 -0600	[thread overview]
Message-ID: <20181214204957.16435.29255.stgit@powerkvm6.aus.stglabs.ibm.com> (raw)
In-Reply-To: <20181214204914.16435.59083.stgit@powerkvm6.aus.stglabs.ibm.com>

Define interface to acquire arch-specific drc info to match against
hotpluggable devices.  The current implementation exposes several
pseries-specific dynamic memory properties in generic kernel code.
This patch set provides an interface to pull that code out of the
generic kernel.

Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
---
 include/linux/topology.h |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/topology.h b/include/linux/topology.h
index cb0775e..df97f5f 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -44,6 +44,15 @@
 
 int arch_update_cpu_topology(void);
 
+int arch_find_drc_match(struct device_node *dn,
+			bool (*usercb)(struct device_node *dn,
+				u32 drc_index, char *drc_name,
+				char *drc_type, u32 drc_power_domain,
+				void *data),
+			char *opt_drc_type, char *opt_drc_name,
+			bool match_drc_index, bool ck_php_type,
+			void *data);
+
 /* Conform to ACPI 2.0 SLIT distance definitions */
 #define LOCAL_DISTANCE		10
 #define REMOTE_DISTANCE		20

