Subject: Re: [PATCH v3 7/8] net: can: c_can: Add support for TI DRA7 DCAN

From: Roger Quadros <[email-masked]>
Date: Wed, 5 Nov 2014 15:36:40 +0200

On 11/05/2014 03:30 PM, Marc Kleine-Budde wrote:
> On 11/04/2014 11:21 AM, Roger Quadros wrote:
>> DRA7 SoC has 2 CAN IPs. Provide compatible IDs and RAMINIT
>> register data for both.
> 
> My understanding of the discussion with Wolfram was:
> - We should put the number of the Interface into to DT as a regmap
>   parameter.
> - We put the method how to find the correct bits into the DT, via the
>   compatible.
> 
> So for both CAN instances on the DRA7 we have a single compatible
> "ti,dra7-d_can" and in the driver a mechanism that translates the number
> of the instance into the needed bit offsets, e.g. via two arrays.
> 

OK. I'll revise this series.

The new syscon-raminit property will be like
syscon-raminit = <syscon_phandle raminit-reg-offset dcan-interface-number>;

cheers,
-roger

> Same comments for patch 8/8.
> 
> Marc
> 
>>
>> Signed-off-by: Roger Quadros <[email-masked]>
>> ---
>>  Documentation/devicetree/bindings/net/can/c_can.txt |  1 +
>>  drivers/net/can/c_can/c_can_platform.c              | 16 ++++++++++++++++
>>  2 files changed, 17 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/can/c_can.txt b/Documentation/devicetree/bindings/net/can/c_can.txt
>> index 917ac0e..746cc07 100644
>> --- a/Documentation/devicetree/bindings/net/can/c_can.txt
>> +++ b/Documentation/devicetree/bindings/net/can/c_can.txt
>> @@ -4,6 +4,7 @@ Bosch C_CAN/D_CAN controller Device Tree Bindings
>>  Required properties:
>>  - compatible		: Should be "bosch,c_can" for C_CAN controllers and
>>  			  "bosch,d_can" for D_CAN controllers.
>> +			  Can be "ti,dra7-d_can1" or "ti,dra7-d_can2".
>>  - reg			: physical base address and size of the C_CAN/D_CAN
>>  			  registers map
>>  - interrupts		: property with a value describing the interrupt
>> diff --git a/drivers/net/can/c_can/c_can_platform.c b/drivers/net/can/c_can/c_can_platform.c
>> index d058820..dc618ce 100644
>> --- a/drivers/net/can/c_can/c_can_platform.c
>> +++ b/drivers/net/can/c_can/c_can_platform.c
>> @@ -195,6 +195,20 @@ static struct c_can_driver_data d_can_drvdata = {
>>  	.id = BOSCH_D_CAN,
>>  };
>>  
>> +static struct c_can_driver_data dra7_dcan1_drvdata = {
>> +	.id = BOSCH_D_CAN,
>> +	.raminit_start_bit = 3,
>> +	.raminit_done_bit = 1,
>> +	.raminit_pulse = true,
>> +};
>> +
>> +static struct c_can_driver_data dra7_dcan2_drvdata = {
>> +	.id = BOSCH_D_CAN,
>> +	.raminit_start_bit = 5,
>> +	.raminit_done_bit = 2,
>> +	.raminit_pulse = true,
>> +};
>> +
>>  static struct platform_device_id c_can_id_table[] = {
>>  	{
>>  		.name = KBUILD_MODNAME,
>> @@ -215,6 +229,8 @@ MODULE_DEVICE_TABLE(platform, c_can_id_table);
>>  static const struct of_device_id c_can_of_table[] = {
>>  	{ .compatible = "bosch,c_can", .data = &c_can_drvdata },
>>  	{ .compatible = "bosch,d_can", .data = &d_can_drvdata },
>> +	{ .compatible = "ti,dra7-d_can1", .data = &dra7_dcan1_drvdata },
>> +	{ .compatible = "ti,dra7-d_can2", .data = &dra7_dcan2_drvdata },
>>  	{ /* sentinel */ },
>>  };
>>  MODULE_DEVICE_TABLE(of, c_can_of_table);
>>
> 
>