linux-kernel - [PATCH 0/2] MCAN: Add support for implementing transceiver as a phy

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 15 Apr 2021 20:36:27 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-can@...r.kernel.org>, <netdev@...r.kernel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Rob Herring <robh+dt@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Aswath Govindraju <a-govindraju@...com>
Subject: [PATCH 0/2] MCAN: Add support for implementing transceiver as a phy

The following series of patches add support for implementing the
transceiver as a phy of m_can_platform driver.

TCAN1042 has a standby signal that needs to be pulled high for
sending/receiving messages[1]. TCAN1043 has a enable signal along with
standby signal that needs to be pulled up for sending/receiving
messages[2], and other combinations of the two lines can be used to put the
transceiver in different states to reduce power consumption. On boards
like the AM654-idk and J721e-evm these signals are controlled using gpios.

These gpios are set in phy driver, and the transceiver can be put in
different states using phy API. The phy driver is added in the series [3].

[1] - https://www.ti.com/lit/ds/symlink/tcan1042h.pdf
[2] - https://www.ti.com/lit/ds/symlink/tcan1043-q1.pdf
[3] - https://lore.kernel.org/patchwork/project/lkml/list/?series=495365

Faiz Abbas (2):
  dt-bindings: net: can: Document transceiver implementation as phy
  can: m_can: Add support for transceiver as phy

 .../devicetree/bindings/net/can/bosch,m_can.yaml    |  3 +++
 drivers/net/can/m_can/m_can.c                       | 10 ++++++++++
 drivers/net/can/m_can/m_can.h                       |  2 ++
 drivers/net/can/m_can/m_can_platform.c              | 13 +++++++++++++
 4 files changed, 28 insertions(+)

-- 
2.17.1