linux-toradex.git/drivers/fpga/altera-ps-spi.c, branch v6.4

fpga: mgr: Use standard dev_release for class driver

2021-11-28T21:59:13+00:00

The FPGA manager class driver data structure is being treated as a
managed resource instead of using the standard dev_release call-back
function to release the class data structure. This change removes
the managed resource code for the freeing of the class data structure
and combines the create() and register() functions into a single
register() or register_full() function.

The register_full() function accepts an info data structure to provide
flexibility in passing optional parameters. The register() function
supports the current parameter list for users that don't require the
use of optional parameters.

The devm_fpga_mgr_register() function is retained, and the
devm_fpga_mgr_register_full() function is added.

Signed-off-by: Russ Weight 
Reviewed-by: Xu Yilun 
Acked-by: Xu Yilun 
Signed-off-by: Moritz Fischer

fpga: fpga-mgr: altera-ps-spi: Simplify registration

2020-12-01T17:49:32+00:00

Simplify registration by using new devm_fpga_mgr_register() API.

Reviewed-by: Tom Rix 
Signed-off-by: Moritz Fischer 
Link: https://lore.kernel.org/r/20201115195127.284487-3-mdf@kernel.org
Signed-off-by: Greg Kroah-Hartman

fpga: altera-ps-spi: Fix getting of optional confd gpio

2019-08-19T00:40:02+00:00

Currently the driver does not handle EPROBE_DEFER for the confd gpio.
Use devm_gpiod_get_optional() instead of devm_gpiod_get() and return
error codes from altera_ps_probe().

Fixes: 5692fae0742d ("fpga manager: Add altera-ps-spi driver for Altera FPGAs")
Signed-off-by: Phil Reid 
Signed-off-by: Moritz Fischer

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422

2019-06-05T15:37:15+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 101 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531190113.822954939@linutronix.de
Signed-off-by: Greg Kroah-Hartman

fpga: mgr: altera-ps-spi: make array dummy static, shrinks object size

2019-01-31T15:22:51+00:00

Don't populate the const array dummy on the stack but instead
make it static. Makes the object code smaller by 26 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
   7371	   2032	      0	   9403	   24bb	drivers/fpga/altera-ps-spi.o

After:
   text	   data	    bss	    dec	    hex	filename
   7281	   2096	      0	   9377	   24a1	drivers/fpga/altera-ps-spi.o

(gcc version 8.2.0 x86_64)

Signed-off-by: Colin Ian King 
Acked-by: Alan Tull 
Acked-by: Moritz Fischer 
Signed-off-by: Greg Kroah-Hartman

fpga: mgr: altera-ps-spi: enable usage on non-dt platforms

2018-11-26T19:12:05+00:00

Driver probing fails on non-dt platforms since of_match_device()
always returns NULL here. Add spi ids with device names and
matching driver data as an index of a map array with data for
supported devices. Add this map array and a function for mapping
spi ids to driver data. This allows driver binding to dynamically
added PS-SPI devices (e.g. when added via spi_new_device() after
hot-plugging).

Signed-off-by: Anatolij Gustschin 
Acked-by: Alan Tull 
Signed-off-by: Greg Kroah-Hartman

fpga: mgr: add devm_fpga_mgr_create

2018-10-16T09:13:50+00:00

Add devm_fpga_mgr_create() which is the managed
version of fpga_mgr_create().

Change current FPGA manager drivers to use
devm_fpga_mgr_create()

Signed-off-by: Alan Tull 
Suggested-by: Federico Vaga 
Acked-by: Moritz Fischer 
Signed-off-by: Greg Kroah-Hartman

fpga: manager: change api, don't use drvdata

2018-05-25T16:23:55+00:00

Change fpga_mgr_register to not set or use drvdata.  This supports
the case where a PCIe device has more than one manager.

Add fpga_mgr_create/free functions.  Change fpga_mgr_register and
fpga_mgr_unregister functions to take the mgr struct as their only
parameter.

  struct fpga_manager *fpga_mgr_create(struct device *dev,
                const char *name,
                const struct fpga_manager_ops *mops,
                void *priv);
  void fpga_mgr_free(struct fpga_manager *mgr);
  int fpga_mgr_register(struct fpga_manager *mgr);
  void fpga_mgr_unregister(struct fpga_manager *mgr);

Update the drivers that call fpga_mgr_register with the new API.

Signed-off-by: Alan Tull 
[Moritz: Fixup whitespace issue]
Reported-by: Jiuyue Ma 
Signed-off-by: Moritz Fischer 
Signed-off-by: Greg Kroah-Hartman

fpga-manager: altera-ps-spi: preserve nCONFIG state

2018-04-23T11:27:05+00:00

If the driver module is loaded when FPGA is configured, the FPGA
is reset because nconfig is pulled low (low-active gpio inited
with GPIOD_OUT_HIGH activates the signal which means setting its
value to low). Init nconfig with GPIOD_OUT_LOW to prevent this.

Signed-off-by: Anatolij Gustschin 
Acked-by: Alan Tull 
Signed-off-by: Moritz Fischer 
Cc: stable  # 4.14+
Signed-off-by: Greg Kroah-Hartman

fpga-manager: altera-ps-spi: use bitrev8x4

2017-07-17T15:26:14+00:00

Speed up bit reversal by using hardware bit reversal
Add extra code to handle less than 4byte remnants, if any

Signed-off-by: Joshua Clayton 
Signed-off-by: Alan Tull 
Signed-off-by: Greg Kroah-Hartman