From mboxrd@z Thu Jan 1 00:00:00 1970 From: cbostic@linux.vnet.ibm.com (Christopher Bostic) Date: Sun, 9 Apr 2017 16:07:02 -0500 Subject: [PATCH v5 22/23] drivers/fsi: Add hub master support In-Reply-To: <8c841062-62e9-77c6-b0c9-e0da73cad3ac@infradead.org> References: <20170405020607.79939-1-cbostic@linux.vnet.ibm.com> <20170405020607.79939-23-cbostic@linux.vnet.ibm.com> <8c841062-62e9-77c6-b0c9-e0da73cad3ac@infradead.org> Message-ID: <0abce906-778f-2478-a859-f993cd40988f@linux.vnet.ibm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 4/5/17 11:36 AM, Randy Dunlap wrote: > On 04/04/17 19:06, Christopher Bostic wrote: >> From: Chris Bostic >> >> Add an engine driver to expose a "hub" FSI master - which has a set of >> control registers in the engine address space, and uses a chunk of the >> slave address space for actual FSI communication. >> >> Additional changes from Jeremy Kerr . >> >> Signed-off-by: Chris Bostic >> Signed-off-by: Jeremy Kerr >> Signed-off-by: Joel Stanley >> --- >> drivers/fsi/Kconfig | 9 ++ >> drivers/fsi/Makefile | 1 + >> drivers/fsi/fsi-master-hub.c | 327 +++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 337 insertions(+) >> create mode 100644 drivers/fsi/fsi-master-hub.c >> >> diff --git a/drivers/fsi/Kconfig b/drivers/fsi/Kconfig >> index 0fa265c..e1156b4 100644 >> --- a/drivers/fsi/Kconfig >> +++ b/drivers/fsi/Kconfig >> @@ -18,6 +18,15 @@ config FSI_MASTER_GPIO >> ---help--- >> This option enables a FSI master driver using GPIO lines. >> >> +config FSI_MASTER_HUB >> + tristate "FSI hub master" >> + depends on FSI > redundant again. Will correct. Thanks, Chris > >> + ---help--- >> + This option enables a FSI hub master driver. Hub is a type of FSI >> + master that is connected to the upstream master via a slave. Hubs >> + allow chaining of FSI links to an arbitrary depth. This allows for >> + a high target device fanout. >> + >> config FSI_SCOM >> tristate "SCOM FSI client device driver" >> depends on FSI >