linux-kernel - [PATCH 0/4] can: mcp251xfd: add gpio functionality

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Date: Wed, 17 Apr 2024 15:43:53 +0200
From: Gregor Herburger <gregor.herburger@...tq-group.com>
To: Marc Kleine-Budde <mkl@...gutronix.de>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Thomas Kopp <thomas.kopp@...rochip.com>, 
 Vincent Mailhol <mailhol.vincent@...adoo.fr>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-can@...r.kernel.org, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 linux@...tq-group.com, gregor.herburger@...tq-group.com, 
 alexander.stein@...tq-group.com
Subject: [PATCH 0/4] can: mcp251xfd: add gpio functionality

Hi all,

The mcp251xfd allows two pins to be configured as GPIOs. This series
adds support for this feature.

The GPIO functionality is controlled with the IOCON register which has
an erratum. The second patch is to work around this erratum. I am not
sure if the place for the check and workaround in
mcp251xfd_regmap_crc_write is correct or if the check could be bypassed
with a direct call to mcp251xfd_regmap_crc_gather_write. If you have a
better suggestion where to add the check please let me know.

Patch 1 fixes a unwanted wakeup of the chip
Patch 2 is the fix/workaround for the aforementioned erratum
Patch 3 adds the gpio support
Patch 4 updates dt-binding

---
Gregor Herburger (4):
      can: mcp251xfd: stop timestamp before sending chip to sleep
      can: mcp251xfd: mcp251xfd_regmap_crc_write(): workaround for errata 5
      can: mcp251xfd: add gpio functionality
      dt-binding: can: mcp251xfd: add gpio-controller property

 .../bindings/net/can/microchip,mcp251xfd.yaml      |   2 +
 drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c     | 139 ++++++++++++++++++++-
 drivers/net/can/spi/mcp251xfd/mcp251xfd-regmap.c   |  56 ++++++++-
 .../net/can/spi/mcp251xfd/mcp251xfd-timestamp.c    |   5 +-
 drivers/net/can/spi/mcp251xfd/mcp251xfd.h          |   4 +
 5 files changed, 200 insertions(+), 6 deletions(-)
---
base-commit: 1fdad13606e104ff103ca19d2d660830cb36d43e
change-id: 20240417-mcp251xfd-gpio-feature-29a1bf6acb54

Best regards,
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