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[PATCH v2 0/3] can: sja1000: support for technologic version

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  [PATCH v2 0/3] can: sja1000: support for technologic version Damien Riegel <damien.riegel@savoirfairelinux.com> - 2015-12-24 18:50 +0100
    [PATCH v2 2/3] can: sja1000: add documentation for Technologic Systems version Damien Riegel <damien.riegel@savoirfairelinux.com> - 2015-12-24 18:50 +0100

#1298017 — [PATCH v2 0/3] can: sja1000: support for technologic version

This patchset introduces support for the technologic version of the
SJA1000. Access to IP's registers are proxied through a window,
requiring two bus accesses to read or write a register. These accesses
must be protected by a spinlock to prevent race conditions. Currently,
there is no easy way to allocate and initialize this spinlock.

SJA1000 already provides a way to allocate private data, but
sja1000_platform.c makes no use of it.

Patch 1 adds the capability to allocate and initialize private data on a
per-compatible basis in sja1000_platform.c.

Patch 2 updates device tree documentation to add the technologic
version.

Patch 3 updates the driver to implement the technologic version

Changes in v2:
 - added a patch to allocate and initialize private data
 - changed device tree documentation
 - added a spinlock to protect bus accesses
 - changed sp_{read,write}_reg16 to io{read,write}16

Damien Riegel (3):
  can: sja1000: of: add per-compatible init hook
  can: sja1000: add documentation for Technologic Systems version
  can: sja1000: of: add compatibility with Technologic Systems version

 .../devicetree/bindings/net/can/sja1000.txt        |  3 +-
 drivers/net/can/sja1000/sja1000_platform.c         | 86 +++++++++++++++++++++-
 2 files changed, 86 insertions(+), 3 deletions(-)

-- 
2.5.0

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#1298018 — [PATCH v2 2/3] can: sja1000: add documentation for Technologic Systems version

This commit adds documentation for the Technologic Systems version of
SJA1000. The difference with the NXP version is in the way the registers
are accessed.

Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
---
 Documentation/devicetree/bindings/net/can/sja1000.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/can/sja1000.txt b/Documentation/devicetree/bindings/net/can/sja1000.txt
index b4a6d53..ac3160e 100644
--- a/Documentation/devicetree/bindings/net/can/sja1000.txt
+++ b/Documentation/devicetree/bindings/net/can/sja1000.txt
@@ -2,7 +2,7 @@ Memory mapped SJA1000 CAN controller from NXP (formerly Philips)
 
 Required properties:
 
-- compatible : should be "nxp,sja1000".
+- compatible : should be one of "nxp,sja1000", "technologic,sja1000".
 
 - reg : should specify the chip select, address offset and size required
 	to map the registers of the SJA1000. The size is usually 0x80.
@@ -14,6 +14,7 @@ Optional properties:
 
 - reg-io-width : Specify the size (in bytes) of the IO accesses that
 	should be performed on the device.  Valid value is 1, 2 or 4.
+	This property is ignored for technologic version.
 	Default to 1 (8 bits).
 
 - nxp,external-clock-frequency : Frequency of the external oscillator
-- 
2.5.0

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