[PATCH] net: dwc_eth_qos: add Kconfig option to select supported configuration

[Marek Vasut]

On 6/10/20 8:52 PM, Tom Rini wrote:
> On Wed, Jun 10, 2020 at 08:42:20PM +0200, Marek Vasut wrote:
>> On 6/10/20 8:10 PM, Tom Rini wrote:
>>> On Mon, Jun 08, 2020 at 11:27:19AM +0200, Patrick Delaunay wrote:
>>>
>>>> Add configuration flag to select the supported dwc driver configuration:
>>>> - CONFIG_DWC_ETH_QOS_TEGRA186
>>>> - CONFIG_DWC_ETH_QOS_IMX
>>>> - CONFIG_DWC_ETH_QOS_STM32
>>>>
>>>> See Linux driver ethernet/stmicro/stmmac and associated glue layers
>>>> for other configuration examples.
>>>>
>>>> This patch removes the not-selected compatibles and lets the linker remove
>>>> the unused functions to reduce the size of the driver.
>>>>
>>>> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
>>>> ---
>>>> Hi,
>>>>
>>>> I propose this patch after Marek's remark in [1].
>>>>
>>>> It is also linked to [2] to limit the STM32 glue for ST compatible.
>>>>
>>>> [1] net: dwc_eth_qos: Make clk_rx and clk_tx optional
>>>>     http://patchwork.ozlabs.org/project/uboot/patch/20200512095603.29126-5-david.wu@rock-chips.com/#2432595
>>>>
>>>> [2] net: dwc_eth_qos: update the compatible supported for STM32
>>>>     http://patchwork.ozlabs.org/project/uboot/list/?series=176917
>>>>
>>>>
>>>>  drivers/net/Kconfig       | 27 ++++++++++++++++++++++++---
>>>>  drivers/net/dwc_eth_qos.c | 12 +++++++++---
>>>>  2 files changed, 33 insertions(+), 6 deletions(-)
>>>>
>>>> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
>>>> index 0b08de0ef4..c4b3667d3b 100644
>>>> --- a/drivers/net/Kconfig
>>>> +++ b/drivers/net/Kconfig
>>>> @@ -156,9 +156,30 @@ config DWC_ETH_QOS
>>>>  	help
>>>>  	  This driver supports the Synopsys Designware Ethernet QOS (Quality
>>>>  	  Of Service) IP block. The IP supports many options for bus type,
>>>> -	  clocking/reset structure, and feature list. This driver currently
>>>> -	  supports the specific configuration used in NVIDIA's Tegra186 chip,
>>>> -	  but should be extensible to other combinations quite easily.
>>>> +	  clocking/reset structure, and feature list.
>>>> +
>>>> +config DWC_ETH_QOS_IMX
>>>> +	bool "Synopsys DWC Ethernet QOS device support for IMX"
>>>> +	depends on DWC_ETH_QOS
>>>> +	help
>>>> +	  The Synopsys Designware Ethernet QOS IP block with the specific
>>>> +	  configuration used in IMX soc.
>>>> +
>>>> +config DWC_ETH_QOS_STM32
>>>> +	bool "Synopsys DWC Ethernet QOS device support for STM32"
>>>> +	depends on DWC_ETH_QOS
>>>> +	default y if ARCH_STM32MP
>>>> +	help
>>>> +	  The Synopsys Designware Ethernet QOS IP block with the specific
>>>> +	  configuration used in STM32MP soc.
>>>> +
>>>> +config DWC_ETH_QOS_TEGRA186
>>>> +	bool "Synopsys DWC Ethernet QOS device support for TEGRA186"
>>>> +	depends on DWC_ETH_QOS
>>>> +	default y if TEGRA186
>>>> +	help
>>>> +	  The Synopsys Designware Ethernet QOS IP block with specific
>>>> +	  configuration used in NVIDIA's Tegra186 chip.
>>>>  
>>>>  config E1000
>>>>  	bool "Intel PRO/1000 Gigabit Ethernet support"
>>>
>>> I like this idea.  But, is there a reason to have more than one of these
>>> enabled?  Assuming not, we should do this as a choice I think so it'll
>>> be clear to the next SoC that they'll need to add this table right away.
>>
>> Should we be able to enable different settings in U-Boot and in SPL ,
>> e.g. for the use case where the SPL is the same on different SoCs, while
>> the U-Boot binary is not ?
> 
> You mean be more like barebox and Linux where the board-specific stuff
> is kicked up one level and we have a more generic binary?  I don't know
> and there's so much work that would be required before having to move
> this from a Kconfig choice to just Kconfig options I don't see that as
> being a relevant question here.
> 
> Or did I misunderstand the question?

More like automatically have a Kconfig option generate it's _SPL and
_TPL variant.