linux/drivers/uio
Peter Colberg d82a7aed83 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] a494f54a9f/libraries/plugins/xfpga/usrclk/fpga_user_clk.c
[3] a494f54a9f/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>
2022-09-01 17:00:33 +02:00
..
Kconfig uio: Remove leading spaces in Kconfig 2021-05-21 14:52:37 +02:00
Makefile uio: uio_dfl: add userspace i/o driver for DFL bus 2021-03-28 14:58:18 +02:00
uio_aec.c uio: uio_aec: Use pci_iounmap instead of iounmap 2021-05-14 13:39:47 +02:00
uio_cif.c uio: uio_cif: use devm_kzalloc() for uio_info object 2020-12-09 19:59:00 +01:00
uio_dfl.c uio: dfl: add IOPLL user-clock feature id 2022-09-01 17:00:33 +02:00
uio_dmem_genirq.c uio: uio_dmem_genirq: Catch the Exception 2021-12-05 14:25:00 +01:00
uio_fsl_elbc_gpcm.c uio: uio_fsl_elbc_gpcm: use device-managed allocators 2020-12-09 19:59:00 +01:00
uio_hv_generic.c Drivers: hv: vmbus: Mark vmbus ring buffer visible to host in Isolation VM 2021-10-28 11:22:23 +00:00
uio_mf624.c uio: uio_mf624: use devm_kzalloc() for uio_info object 2020-12-09 19:58:54 +01:00
uio_netx.c uio: uio_netx: use devm_kzalloc() for or uio_info object 2020-12-09 19:58:54 +01:00
uio_pci_generic.c Merge 50f09a3dd5 ("Merge tag 'char-misc-5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc") into char-misc-next 2021-05-21 09:48:31 +02:00
uio_pdrv_genirq.c Merge branch 'char-misc-linus' into 'char-misc-next' 2020-07-10 13:42:33 +02:00
uio_pruss.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 2) 2022-06-10 14:51:35 +02:00
uio_sercos3.c uio: uio_sercos3: use device-managed functions for simple allocs 2020-12-09 19:58:54 +01:00
uio.c UIO: use default_groups in kobj_type 2021-12-29 10:54:50 +01:00