netdev - [PATCH v3 0/2] MCAN: Add support for implementing transceiver as a phy

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Date:   Fri, 16 Apr 2021 17:12:43 +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>,
        Faiz Abbas <faiz_abbas@...com>,
        Aswath Govindraju <a-govindraju@...com>
Subject: [PATCH v3 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].

This patch series is dependent on [4].

changes since v2:
- changed dev_err to dev_err_probe in patch 2
- used mcan_class instead of priv to assign max bit rate
- Picked up  Rob Herring's acked-by for patch 1

changes since v1:
- Used the API devm_phy_get_optional() instead of 
  devm_of_phy_get_optional_by_index()

[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=495511
[4] - https://lore.kernel.org/patchwork/patch/1413286/

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