Hi all,
On 16/04/21 5:12 pm, Aswath Govindraju wrote:
> 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/
>
Posted v4 for this series after adding phy_power_off in the path when
there is an error.
Thanks,
Aswath
> 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(+)
>