linux-kernel - Re: [PATCH v8 1/4] can: m_can: Create a m

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Date:   Tue, 12 Mar 2019 13:43:41 +0100
From:   Wolfgang Grandegger <wg@...ndegger.com>
To:     Dan Murphy <dmurphy@...com>, mkl@...gutronix.de,
        davem@...emloft.net
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 1/4] can: m_can: Create a m_can platform framework

Hello Dan,

Am 12.03.19 um 13:12 schrieb Dan Murphy:
> Create a m_can platform framework that peripherial
> devices can register to and use common code and register sets.
> The peripherial devices may provide read/write and configuration
> support of the IP.
> 
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
> 
> v8 - Added a clean function for the tx_skb, cleaned up skb on BUS_OFF and on xmit
> BUSY - https://lore.kernel.org/patchwork/patch/1047980/
> 
> v7 - Fixed remaining new checkpatch issues, removed CSR setting, fixed tx hard
> start function to return tx_busy, and renamed device callbacks - https://lore.kernel.org/patchwork/patch/1047220/
> v6 - Squashed platform patch to this patch for bissectablity, fixed coding style
> issues, updated Kconfig help, placed mcan reg offsets back into c file, renamed
> priv->skb to priv->tx_skb and cleared perp interrupts at ISR start -
> Patch 1 comments - https://lore.kernel.org/patchwork/patch/1042446/
> Patch 2 comments - https://lore.kernel.org/patchwork/patch/1042442/
> 
>  drivers/net/can/m_can/Kconfig          |  13 +-
>  drivers/net/can/m_can/Makefile         |   1 +
>  drivers/net/can/m_can/m_can.c          | 717 +++++++++++++------------
>  drivers/net/can/m_can/m_can.h          | 110 ++++
>  drivers/net/can/m_can/m_can_platform.c | 202 +++++++
>  5 files changed, 699 insertions(+), 344 deletions(-)
>  create mode 100644 drivers/net/can/m_can/m_can.h
>  create mode 100644 drivers/net/can/m_can/m_can_platform.c
> 
> diff --git a/drivers/net/can/m_can/Kconfig b/drivers/net/can/m_can/Kconfig
> index 04f20dd39007..f7119fd72df4 100644
> --- a/drivers/net/can/m_can/Kconfig
> +++ b/drivers/net/can/m_can/Kconfig
> @@ -1,5 +1,14 @@
>  config CAN_M_CAN
> +	tristate "Bosch M_CAN support"
> +	---help---
> +	  Say Y here if you want support for Bosch M_CAN controller framework.
> +	  This is common support for devices that embed the Bosch M_CAN IP.
> +
> +config CAN_M_CAN_PLATFORM
> +	tristate "Bosch M_CAN support for io-mapped devices"
>  	depends on HAS_IOMEM
> -	tristate "Bosch M_CAN devices"
> +	depends on CAN_M_CAN
>  	---help---
> -	  Say Y here if you want to support for Bosch M_CAN controller.
> +	  Say Y here if you want support for IO Mapped Bosch M_CAN controller.
> +	  This support is for devices that have the Bosch M_CAN controller
> +	  IP embedded into the device and the IP is IO Mapped to the processor.
> diff --git a/drivers/net/can/m_can/Makefile b/drivers/net/can/m_can/Makefile
> index 8bbd7f24f5be..057bbcdb3c74 100644
> --- a/drivers/net/can/m_can/Makefile
> +++ b/drivers/net/can/m_can/Makefile
> @@ -3,3 +3,4 @@
>  #
>  
>  obj-$(CONFIG_CAN_M_CAN) += m_can.o
> +obj-$(CONFIG_CAN_M_CAN_PLATFORM) += m_can_platform.o

... snip ...

> diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
> -static int m_can_dev_setup(struct platform_device *pdev, struct net_device *dev,
> -			   void __iomem *addr)
> +static int m_can_dev_setup(struct m_can_priv *m_can_dev)
>  {
> -	struct m_can_priv *priv;
> +	struct net_device *dev = m_can_dev->net;
>  	int m_can_version;
>  
> -	m_can_version = m_can_check_core_release(addr);
> +	m_can_version = m_can_check_core_release(m_can_dev);

What is m_can_version for the tcan4x5x?

... snip ...

Wolfgang.