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

[Tom Rini]

On Wed, Jun 10, 2020 at 08:55:36PM +0200, Marek Vasut wrote:
> 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.

Ah.  Well, that is rephrasing my first question.  Would it ever make
sense to have more than one of these enabled?

-- 
Tom
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