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authorPeter Colberg <peter.colberg@intel.com>2022-08-31 23:48:51 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-09-01 18:00:33 +0300
commitd82a7aed83bacaee08cf77503e3d0e6e667f8526 (patch)
treecf05e5336d3f1cc78f8602e547b3c4a9c8a4d027 /drivers/uio
parent116769d385a81f874f9d407ae92c09b1af44023b (diff)
downloadlinux-d82a7aed83bacaee08cf77503e3d0e6e667f8526.tar.xz
uio: dfl: add IOPLL user-clock feature id
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 Acked-by: Xu Yilun <yilun.xu@intel.com> Signed-off-by: Russ Weight <russell.h.weight@intel.com> Signed-off-by: Peter Colberg <peter.colberg@intel.com> Link: https://lore.kernel.org/r/20220831204851.4683-1-peter.colberg@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uio')
-rw-r--r--drivers/uio/uio_dfl.c2
1 files changed, 2 insertions, 0 deletions
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);