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SubjectRe: [PATCH v2] uio: dfl: add IOPLL user-clock feature id
On 2022-08-26 at 11:01:16 -0400, Peter Colberg wrote:
> Add a Device Feature List (DFL) feature id [1] for the configurable
> IOPLL user clock source, which can be used to configure the clock
> speeds that are used for RTL logic that is programmed into the
> Partial Reconfiguration (PR) region of an FPGA.
>
> The IOPLL user-space driver [2] contains frequency tables [3]
> with the specific user clock frequencies for an implementation.
>
> For each desired frequency, the table values are produced by calling
> the quartus tool, the same tool that generates the IOPLL RTL logic.
> The quartus tool allows the RTL designer to select different options
> which can affect the table values. The table-driven, user-space
> driver allows for supporting future, modified implementations and
> provides users the ability to modify the IOPLL implementation.
>
> [1] https://github.com/OPAE/dfl-feature-id
> [2] https://github.com/OPAE/opae-sdk/blob/a494f54a9f0356d0425edbff228f0254a4c70303/libraries/plugins/xfpga/usrclk/fpga_user_clk.c
> [3] https://github.com/OPAE/opae-sdk/blob/a494f54a9f0356d0425edbff228f0254a4c70303/libraries/plugins/xfpga/usrclk/fpga_user_clk_freq.h
>
> Signed-off-by: Peter Colberg <peter.colberg@intel.com>
> Signed-off-by: Russ Weight <russell.h.weight@intel.com>

Acked-by: Xu Yilun <yilun.xu@intel.com>

> ---
> drivers/uio/uio_dfl.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/uio/uio_dfl.c b/drivers/uio/uio_dfl.c
> index 8f39cc8bb034..69e93f3e7faf 100644
> --- a/drivers/uio/uio_dfl.c
> +++ b/drivers/uio/uio_dfl.c
> @@ -46,10 +46,12 @@ static int uio_dfl_probe(struct dfl_device *ddev)
>
> #define FME_FEATURE_ID_ETH_GROUP 0x10
> #define FME_FEATURE_ID_HSSI_SUBSYS 0x15
> +#define PORT_FEATURE_ID_IOPLL_USRCLK 0x14
>
> static const struct dfl_device_id uio_dfl_ids[] = {
> { FME_ID, FME_FEATURE_ID_ETH_GROUP },
> { FME_ID, FME_FEATURE_ID_HSSI_SUBSYS },
> + { PORT_ID, PORT_FEATURE_ID_IOPLL_USRCLK },
> { }
> };
> MODULE_DEVICE_TABLE(dfl, uio_dfl_ids);
> --
> 2.28.0
>

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