linux-kernel - Re: [PATCH v2 0/6] CAN TRANSCEIVER: Add support for CAN transceivers

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Message-ID: <20210414154319.knn323wo6vi3t2dp@pengutronix.de>
Date:   Wed, 14 Apr 2021 17:43:19 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Aswath Govindraju <a-govindraju@...com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-phy@...ts.infradead.org,
        Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, Vignesh Raghavendra <vigneshr@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Grygorii Strashko <grygorii.strashko@...com>
Subject: Re: [PATCH v2 0/6] CAN TRANSCEIVER: Add support for CAN transceivers

On 14.04.2021 19:35:15, Aswath Govindraju wrote:
> The following series of patches add support for CAN transceivers.
> 
> 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.
> 
> Patch 1 rewords the comment that restricts max_link_rate attribute to have
> units of Mbps.
> 
> Patch 2 adds an API for devm_of_phy_optional_get_by_index

You probably want to split this into 2 or even 3 separate series. The
first one would be patches 1+2 then 3+4 they can go via the phy tree.
Patches 5+6 can go via linux-can-next

> Patch 3 models the transceiver as a phy device tree node with properties
> for max bit rate supported, gpio properties for indicating gpio pin numbers
> to which standby and enable signals are connected.
> 
> Patch 4 adds a generic driver to support CAN transceivers.
> 
> Patches 5 & 6 add support for implementing the transceiver as a phy of
> m_can_platform driver.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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