[v3,1/2] doc: Add bindings document for Xilinx LogiCore PR Decoupler

Submitted by mdf@kernel.org on March 17, 2017, 8:11 p.m.

Details

Message ID 1489781473-30772-1-git-send-email-mdf@kernel.org
State Changes Requested
Headers show

Commit Message

mdf@kernel.org March 17, 2017, 8:11 p.m.
This adds the binding documentation for the Xilinx LogiCORE PR
Decoupler soft core.

Signed-off-by: Moritz Fischer <mdf@kernel.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
---

Changes from v2:
- Added refence to generic fpga-region bindings
- Fixed up reg property in example
- Added fallback to "xlnx,pr-decoupler" without version

Changes from v1:
- Added clock names & clock to example
- Merged some of the description from Michal's version

---
 .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt

Comments

Michal Simek March 20, 2017, 10:02 a.m.
On 17.3.2017 21:11, Moritz Fischer wrote:
> This adds support for the Xilinx LogiCORE PR Decoupler
> soft-ip that does decoupling of PR regions in the FPGA
> fabric during partial reconfiguration.
> 
> Signed-off-by: Moritz Fischer <mdf@kernel.org>
> Cc: Michal Simek <michal.simek@xilinx.com>
> Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> ---
> Changes from v2:
> - Added Michal's Signed-off-by

btw: you forgot to add it above. :-)

> - Added "xlnx,pr-decoupler" unversioned fallback
> 
> Changes from v1:
> - Added Michal as Co-Author since I pulled in some of his code
> - Reworked clk handling in _remove()
> - Pulled in Michal's version of show_enable(), ditched priv->enabled
> 
> ---
>  drivers/fpga/Kconfig               |   9 +++
>  drivers/fpga/Makefile              |   1 +
>  drivers/fpga/xilinx-pr-decoupler.c | 148 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 158 insertions(+)
>  create mode 100644 drivers/fpga/xilinx-pr-decoupler.c
> 
> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> index ce861a2..ce0c91d 100644
> --- a/drivers/fpga/Kconfig
> +++ b/drivers/fpga/Kconfig
> @@ -63,6 +63,15 @@ config ALTERA_FREEZE_BRIDGE
>  	  isolate one region of the FPGA from the busses while that
>  	  region is being reprogrammed.
>  
> +config XILINX_PR_DECOUPLER
> +	tristate "Xilinx LogiCORE PR Decoupler"
> +	depends on FPGA_BRIDGE
> +	help
> +	  Say Y to enable drivers for Xilinx LogiCORE PR Decoupler.
> +	  The PR Decoupler exists in the FPGA fabric to isolate one
> +	  region of the FPGA from the busses while that region is
> +	  being reprogrammed during partial reconfig.
> +
>  endif # FPGA
>  
>  endmenu
> diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> index 8df07bc..ba94b79 100644
> --- a/drivers/fpga/Makefile
> +++ b/drivers/fpga/Makefile
> @@ -14,6 +14,7 @@ obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA)	+= zynq-fpga.o
>  obj-$(CONFIG_FPGA_BRIDGE)		+= fpga-bridge.o
>  obj-$(CONFIG_SOCFPGA_FPGA_BRIDGE)	+= altera-hps2fpga.o altera-fpga2sdram.o
>  obj-$(CONFIG_ALTERA_FREEZE_BRIDGE)	+= altera-freeze-bridge.o
> +obj-$(CONFIG_XILINX_PR_DECOUPLER)	+= xilinx-pr-decoupler.o
>  
>  # High Level Interfaces
>  obj-$(CONFIG_FPGA_REGION)		+= fpga-region.o
> diff --git a/drivers/fpga/xilinx-pr-decoupler.c b/drivers/fpga/xilinx-pr-decoupler.c
> new file mode 100644
> index 0000000..dd37b1c
> --- /dev/null
> +++ b/drivers/fpga/xilinx-pr-decoupler.c
> @@ -0,0 +1,148 @@
> +/*
> + * Copyright (c) 2017, National Instruments Corp.
> + * Copyright (c) 2017, Xilix Inc
> + *
> + * FPGA Bridge Driver for the Xilinx LogiCORE Partial Reconfiguration
> + * Decoupler IP Core.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; version 2 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/of_device.h>
> +#include <linux/module.h>
> +#include <linux/fpga/fpga-bridge.h>
> +
> +#define CTRL_CMD_DECOUPLE	BIT(0)
> +#define CTRL_CMD_COUPLE		~BIT(0)

for others - this was reported by 0-day testing system as a warning.

M
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Michal Simek March 20, 2017, 10:03 a.m.
On 17.3.2017 21:11, Moritz Fischer wrote:
> This adds the binding documentation for the Xilinx LogiCORE PR
> Decoupler soft core.
> 
> Signed-off-by: Moritz Fischer <mdf@kernel.org>
> Cc: Michal Simek <michal.simek@xilinx.com>
> Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> ---
> 
> Changes from v2:
> - Added refence to generic fpga-region bindings
> - Fixed up reg property in example
> - Added fallback to "xlnx,pr-decoupler" without version
> 
> Changes from v1:
> - Added clock names & clock to example
> - Merged some of the description from Michal's version
> 
> ---
>  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> 
> diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> new file mode 100644
> index 0000000..16141bd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> @@ -0,0 +1,35 @@
> +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
> +
> +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
> +decouplers / fpga bridges.
> +The controller can decouple/disable the bridges which prevents signal
> +changes from passing through the bridge.  The controller can also
> +couple / enable the bridges which allows traffic to pass through the
> +bridge normally.
> +
> +The Driver supports only MMIO handling. A PR region can have multiple
> +PR Decouples which can bhe handled independently or chaines via decouple/
> +decouple_status signals.
> +
> +Required properties:
> +- compatible		: Should contain "xlnx,pr-decoupler-1.00"

here should be also that "xlnx-pr-decoupler" too.

Other than this all looks good.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Thanks,
Michal

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Alan Tull March 20, 2017, 4:17 p.m.
On Fri, Mar 17, 2017 at 3:11 PM, Moritz Fischer <mdf@kernel.org> wrote:

Hi Moritz,

Minor nits below.  Otherwise, looks good.

> This adds the binding documentation for the Xilinx LogiCORE PR
> Decoupler soft core.
>
> Signed-off-by: Moritz Fischer <mdf@kernel.org>
> Cc: Michal Simek <michal.simek@xilinx.com>
> Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: devicetree@vger.kernel.org

Acked-by: Alan Tull <atull@kernel.org>

> ---
>
> Changes from v2:
> - Added refence to generic fpga-region bindings
> - Fixed up reg property in example
> - Added fallback to "xlnx,pr-decoupler" without version
>
> Changes from v1:
> - Added clock names & clock to example
> - Merged some of the description from Michal's version
>
> ---
>  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
>
> diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> new file mode 100644
> index 0000000..16141bd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> @@ -0,0 +1,35 @@
> +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
> +
> +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
> +decouplers / fpga bridges.
> +The controller can decouple/disable the bridges which prevents signal
> +changes from passing through the bridge.  The controller can also
> +couple / enable the bridges which allows traffic to pass through the
> +bridge normally.
> +
> +The Driver supports only MMIO handling. A PR region can have multiple
> +PR Decouples which can bhe handled independently or chaines via decouple/

s/PR Decoupler/PR Decouplers/
s/bhe/be/
s/chaines/chained/

> +decouple_status signals.
> +
> +Required properties:
> +- compatible           : Should contain "xlnx,pr-decoupler-1.00"
> +- regs                 : base address and size for decoupler module
> +- clocks               : input clock to IP
> +- clock-names          : should contain "aclk"
> +
> +Optional properties:
> +- bridge-enable                : 0 if driver should disable bridge at startup
> +                         1 if driver should enable bridge at startup
> +                         Default is to leave bridge in current state.
> +
> +See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings.
> +
> +Example:
> +       fpga-bridge@100000450 {
> +               compatible = "xlnx,pr-decoupler-1.00",
> +                            "xlnx-pr-decoupler";
> +               regs = <0x10000045 0x10>;
> +               clocks = <&clkc 15>;
> +               clock-names = "aclk";
> +               bridge-enable = <0>;
> +       };
> --
> 2.7.4
>
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Alan Tull March 20, 2017, 4:28 p.m.
On Fri, Mar 17, 2017 at 3:11 PM, Moritz Fischer <mdf@kernel.org> wrote:

Hi Moritz,

Looks good except for the kbuild robot warnings that need to be fixed.

Alan

> This adds support for the Xilinx LogiCORE PR Decoupler
> soft-ip that does decoupling of PR regions in the FPGA
> fabric during partial reconfiguration.
>
> Signed-off-by: Moritz Fischer <mdf@kernel.org>
> Cc: Michal Simek <michal.simek@xilinx.com>
> Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> ---
> Changes from v2:
> - Added Michal's Signed-off-by
> - Added "xlnx,pr-decoupler" unversioned fallback
>
> Changes from v1:
> - Added Michal as Co-Author since I pulled in some of his code
> - Reworked clk handling in _remove()
> - Pulled in Michal's version of show_enable(), ditched priv->enabled
>
> ---
>  drivers/fpga/Kconfig               |   9 +++
>  drivers/fpga/Makefile              |   1 +
>  drivers/fpga/xilinx-pr-decoupler.c | 148 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 158 insertions(+)
>  create mode 100644 drivers/fpga/xilinx-pr-decoupler.c
>
> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> index ce861a2..ce0c91d 100644
> --- a/drivers/fpga/Kconfig
> +++ b/drivers/fpga/Kconfig
> @@ -63,6 +63,15 @@ config ALTERA_FREEZE_BRIDGE
>           isolate one region of the FPGA from the busses while that
>           region is being reprogrammed.
>
> +config XILINX_PR_DECOUPLER
> +       tristate "Xilinx LogiCORE PR Decoupler"
> +       depends on FPGA_BRIDGE
> +       help
> +         Say Y to enable drivers for Xilinx LogiCORE PR Decoupler.
> +         The PR Decoupler exists in the FPGA fabric to isolate one
> +         region of the FPGA from the busses while that region is
> +         being reprogrammed during partial reconfig.
> +
>  endif # FPGA
>
>  endmenu
> diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> index 8df07bc..ba94b79 100644
> --- a/drivers/fpga/Makefile
> +++ b/drivers/fpga/Makefile
> @@ -14,6 +14,7 @@ obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA)      += zynq-fpga.o
>  obj-$(CONFIG_FPGA_BRIDGE)              += fpga-bridge.o
>  obj-$(CONFIG_SOCFPGA_FPGA_BRIDGE)      += altera-hps2fpga.o altera-fpga2sdram.o
>  obj-$(CONFIG_ALTERA_FREEZE_BRIDGE)     += altera-freeze-bridge.o
> +obj-$(CONFIG_XILINX_PR_DECOUPLER)      += xilinx-pr-decoupler.o
>
>  # High Level Interfaces
>  obj-$(CONFIG_FPGA_REGION)              += fpga-region.o
> diff --git a/drivers/fpga/xilinx-pr-decoupler.c b/drivers/fpga/xilinx-pr-decoupler.c
> new file mode 100644
> index 0000000..dd37b1c
> --- /dev/null
> +++ b/drivers/fpga/xilinx-pr-decoupler.c
> @@ -0,0 +1,148 @@
> +/*
> + * Copyright (c) 2017, National Instruments Corp.
> + * Copyright (c) 2017, Xilix Inc
> + *
> + * FPGA Bridge Driver for the Xilinx LogiCORE Partial Reconfiguration
> + * Decoupler IP Core.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; version 2 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/of_device.h>
> +#include <linux/module.h>
> +#include <linux/fpga/fpga-bridge.h>
> +
> +#define CTRL_CMD_DECOUPLE      BIT(0)
> +#define CTRL_CMD_COUPLE                ~BIT(0)
> +
> +struct xlnx_pr_decoupler_data {
> +       void __iomem *io_base;
> +       struct clk *clk;
> +};
> +
> +static int xlnx_pr_decoupler_enable_set(struct fpga_bridge *bridge, bool enable)
> +{
> +       int err;
> +       struct xlnx_pr_decoupler_data *priv = bridge->priv;
> +
> +       err = clk_enable(priv->clk);
> +       if (err)
> +               return err;
> +
> +       if (enable)
> +               writel(CTRL_CMD_COUPLE, priv->io_base);
> +       else
> +               writel(CTRL_CMD_DECOUPLE, priv->io_base);
> +
> +       clk_disable(priv->clk);
> +
> +       return 0;
> +}
> +
> +static int xlnx_pr_decoupler_enable_show(struct fpga_bridge *bridge)
> +{
> +       const struct xlnx_pr_decoupler_data *priv = bridge->priv;
> +       u32 status;
> +       int err;
> +
> +       err = clk_enable(priv->clk);
> +       if (err)
> +               return err;
> +
> +       status = readl(priv->io_base);
> +
> +       clk_disable(priv->clk);
> +
> +       return !status;
> +}
> +
> +static struct fpga_bridge_ops xlnx_pr_decoupler_br_ops = {
> +       .enable_set = xlnx_pr_decoupler_enable_set,
> +       .enable_show = xlnx_pr_decoupler_enable_show,
> +};
> +
> +static const struct of_device_id xlnx_pr_decoupler_of_match[] = {
> +       { .compatible = "xlnx,pr-decoupler-1.00", },
> +       { .compatible = "xlnx,pr-decoupler", },
> +       {},
> +};
> +MODULE_DEVICE_TABLE(of, xlnx_pr_decoupler_of_match);
> +
> +static int xlnx_pr_decoupler_probe(struct platform_device *pdev)
> +{
> +       struct xlnx_pr_decoupler_data *priv;
> +       int err;
> +       struct resource *res;
> +
> +       priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> +       if (!priv)
> +               return -ENOMEM;
> +
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       priv->io_base = devm_ioremap_resource(&pdev->dev, res);
> +       if (IS_ERR(priv->io_base))
> +               return PTR_ERR(priv->io_base);
> +
> +       priv->clk = devm_clk_get(&pdev->dev, "aclk");
> +       if (IS_ERR(priv->clk)) {
> +               dev_err(&pdev->dev, "input clock not found\n");
> +               return PTR_ERR(priv->clk);
> +       }
> +
> +       err = clk_prepare_enable(priv->clk);
> +       if (err) {
> +               dev_err(&pdev->dev, "unable to enable clock\n");
> +               return err;
> +       }
> +
> +       clk_disable(priv->clk);
> +
> +       err = fpga_bridge_register(&pdev->dev, "Xilinx PR Decoupler",
> +                                  &xlnx_pr_decoupler_br_ops, priv);
> +
> +       if (err) {
> +               dev_err(&pdev->dev, "unable to register Xilinx PR Decoupler");
> +               clk_unprepare(priv->clk);
> +               return err;
> +       }
> +
> +       return 0;
> +}
> +
> +static int xlnx_pr_decoupler_remove(struct platform_device *pdev)
> +{
> +       struct fpga_bridge *bridge = platform_get_drvdata(pdev);
> +       struct xlnx_pr_decoupler_data *p = bridge->priv;
> +
> +       fpga_bridge_unregister(&pdev->dev);
> +
> +       clk_unprepare(p->clk);
> +
> +       return 0;
> +}
> +
> +static struct platform_driver xlnx_pr_decoupler_driver = {
> +       .probe = xlnx_pr_decoupler_probe,
> +       .remove = xlnx_pr_decoupler_remove,
> +       .driver = {
> +               .name = "xlnx_pr_decoupler",
> +               .of_match_table = of_match_ptr(xlnx_pr_decoupler_of_match),
> +       },
> +};
> +
> +module_platform_driver(xlnx_pr_decoupler_driver);
> +
> +MODULE_DESCRIPTION("Xilinx Partial Reconfiguration Decoupler");
> +MODULE_AUTHOR("Moritz Fischer <mdf@kernel.org>");
> +MODULE_AUTHOR("Michal Simek <michal.simek@xilinx.com>");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Rob Herring March 24, 2017, 2:59 p.m.
On Fri, Mar 17, 2017 at 01:11:12PM -0700, Moritz Fischer wrote:
> This adds the binding documentation for the Xilinx LogiCORE PR
> Decoupler soft core.
> 
> Signed-off-by: Moritz Fischer <mdf@kernel.org>
> Cc: Michal Simek <michal.simek@xilinx.com>
> Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> ---
> 
> Changes from v2:
> - Added refence to generic fpga-region bindings
> - Fixed up reg property in example
> - Added fallback to "xlnx,pr-decoupler" without version
> 
> Changes from v1:
> - Added clock names & clock to example
> - Merged some of the description from Michal's version
> 
> ---
>  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> 
> diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> new file mode 100644
> index 0000000..16141bd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> @@ -0,0 +1,35 @@
> +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
> +
> +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
> +decouplers / fpga bridges.
> +The controller can decouple/disable the bridges which prevents signal
> +changes from passing through the bridge.  The controller can also
> +couple / enable the bridges which allows traffic to pass through the
> +bridge normally.
> +
> +The Driver supports only MMIO handling. A PR region can have multiple
> +PR Decouples which can bhe handled independently or chaines via decouple/

s/chaines/chains/

> +decouple_status signals.
> +
> +Required properties:
> +- compatible		: Should contain "xlnx,pr-decoupler-1.00"
> +- regs			: base address and size for decoupler module
> +- clocks		: input clock to IP
> +- clock-names		: should contain "aclk"
> +
> +Optional properties:
> +- bridge-enable		: 0 if driver should disable bridge at startup
> +			  1 if driver should enable bridge at startup
> +			  Default is to leave bridge in current state.

This is common and should move into a common doc. Maybe fpga-region.txt 
works?

> +
> +See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings.
> +
> +Example:
> +	fpga-bridge@100000450 {
> +		compatible = "xlnx,pr-decoupler-1.00",
> +			     "xlnx-pr-decoupler";
> +		regs = <0x10000045 0x10>;
> +		clocks = <&clkc 15>;
> +		clock-names = "aclk";
> +		bridge-enable = <0>;
> +	};
> -- 
> 2.7.4
> 
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Moritz Fischer March 24, 2017, 3:23 p.m.
On Fri, Mar 24, 2017 at 09:59:08AM -0500, Rob Herring wrote:
> On Fri, Mar 17, 2017 at 01:11:12PM -0700, Moritz Fischer wrote:
> > This adds the binding documentation for the Xilinx LogiCORE PR
> > Decoupler soft core.
> > 
> > Signed-off-by: Moritz Fischer <mdf@kernel.org>
> > Cc: Michal Simek <michal.simek@xilinx.com>
> > Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> > Cc: linux-kernel@vger.kernel.org
> > Cc: devicetree@vger.kernel.org
> > ---
> > 
> > Changes from v2:
> > - Added refence to generic fpga-region bindings
> > - Fixed up reg property in example
> > - Added fallback to "xlnx,pr-decoupler" without version
> > 
> > Changes from v1:
> > - Added clock names & clock to example
> > - Merged some of the description from Michal's version
> > 
> > ---
> >  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
> >  1 file changed, 35 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> > new file mode 100644
> > index 0000000..16141bd
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> > @@ -0,0 +1,35 @@
> > +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
> > +
> > +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
> > +decouplers / fpga bridges.
> > +The controller can decouple/disable the bridges which prevents signal
> > +changes from passing through the bridge.  The controller can also
> > +couple / enable the bridges which allows traffic to pass through the
> > +bridge normally.
> > +
> > +The Driver supports only MMIO handling. A PR region can have multiple
> > +PR Decouples which can bhe handled independently or chaines via decouple/
> 
> s/chaines/chains/

Fixed in v4.

> > +decouple_status signals.
> > +
> > +Required properties:
> > +- compatible		: Should contain "xlnx,pr-decoupler-1.00"
> > +- regs			: base address and size for decoupler module
> > +- clocks		: input clock to IP
> > +- clock-names		: should contain "aclk"
> > +
> > +Optional properties:
> > +- bridge-enable		: 0 if driver should disable bridge at startup
> > +			  1 if driver should enable bridge at startup
> > +			  Default is to leave bridge in current state.
> 
> This is common and should move into a common doc. Maybe fpga-region.txt 
> works?

Ok will add patch for that to v5 series.

Thanks for your feedback,

Moritz
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Alan Tull March 24, 2017, 5:25 p.m.
On Fri, Mar 24, 2017 at 10:23 AM, Moritz Fischer
<moritz.fischer.private@gmail.com> wrote:
> On Fri, Mar 24, 2017 at 09:59:08AM -0500, Rob Herring wrote:
>> On Fri, Mar 17, 2017 at 01:11:12PM -0700, Moritz Fischer wrote:
>> > This adds the binding documentation for the Xilinx LogiCORE PR
>> > Decoupler soft core.
>> >
>> > Signed-off-by: Moritz Fischer <mdf@kernel.org>
>> > Cc: Michal Simek <michal.simek@xilinx.com>
>> > Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
>> > Cc: linux-kernel@vger.kernel.org
>> > Cc: devicetree@vger.kernel.org
>> > ---
>> >
>> > Changes from v2:
>> > - Added refence to generic fpga-region bindings
>> > - Fixed up reg property in example
>> > - Added fallback to "xlnx,pr-decoupler" without version
>> >
>> > Changes from v1:
>> > - Added clock names & clock to example
>> > - Merged some of the description from Michal's version
>> >
>> > ---
>> >  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
>> >  1 file changed, 35 insertions(+)
>> >  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
>> >
>> > diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
>> > new file mode 100644
>> > index 0000000..16141bd
>> > --- /dev/null
>> > +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
>> > @@ -0,0 +1,35 @@
>> > +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
>> > +
>> > +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
>> > +decouplers / fpga bridges.
>> > +The controller can decouple/disable the bridges which prevents signal
>> > +changes from passing through the bridge.  The controller can also
>> > +couple / enable the bridges which allows traffic to pass through the
>> > +bridge normally.
>> > +
>> > +The Driver supports only MMIO handling. A PR region can have multiple
>> > +PR Decouples which can bhe handled independently or chaines via decouple/
>>
>> s/chaines/chains/
>
> Fixed in v4.
>
>> > +decouple_status signals.
>> > +
>> > +Required properties:
>> > +- compatible               : Should contain "xlnx,pr-decoupler-1.00"
>> > +- regs                     : base address and size for decoupler module
>> > +- clocks           : input clock to IP
>> > +- clock-names              : should contain "aclk"
>> > +
>> > +Optional properties:
>> > +- bridge-enable            : 0 if driver should disable bridge at startup
>> > +                     1 if driver should enable bridge at startup
>> > +                     Default is to leave bridge in current state.
>>
>> This is common and should move into a common doc. Maybe fpga-region.txt
>> works?
>
> Ok will add patch for that to v5 series.

Arg, our emails criss-crossed.  I've already sent v4 to Greg.  I hope
we don't need v5 for this one thing.  bridge-enable is common for the
fpga bridges (altera-fpga2sdram-bridge.txt, altera-freeze-bridge.txt,
altera-hps2fpga-bridge.txt, xilinx-pr-decoupler.txt).  Probably we
need a new patch to move this common bridges binding from all the
above to fpga-region.txt or create a new fpga-bridges.txt.  At first
blush, I prefer the later.

Alan


>
> Thanks for your feedback,
>
> Moritz
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Moritz Fischer March 24, 2017, 6:07 p.m.
On Fri, Mar 24, 2017 at 12:25:25PM -0500, Alan Tull wrote:
> On Fri, Mar 24, 2017 at 10:23 AM, Moritz Fischer
> <moritz.fischer.private@gmail.com> wrote:
> > On Fri, Mar 24, 2017 at 09:59:08AM -0500, Rob Herring wrote:
> >> On Fri, Mar 17, 2017 at 01:11:12PM -0700, Moritz Fischer wrote:
> >> > This adds the binding documentation for the Xilinx LogiCORE PR
> >> > Decoupler soft core.
> >> >
> >> > Signed-off-by: Moritz Fischer <mdf@kernel.org>
> >> > Cc: Michal Simek <michal.simek@xilinx.com>
> >> > Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
> >> > Cc: linux-kernel@vger.kernel.org
> >> > Cc: devicetree@vger.kernel.org
> >> > ---
> >> >
> >> > Changes from v2:
> >> > - Added refence to generic fpga-region bindings
> >> > - Fixed up reg property in example
> >> > - Added fallback to "xlnx,pr-decoupler" without version
> >> >
> >> > Changes from v1:
> >> > - Added clock names & clock to example
> >> > - Merged some of the description from Michal's version
> >> >
> >> > ---
> >> >  .../bindings/fpga/xilinx-pr-decoupler.txt          | 35 ++++++++++++++++++++++
> >> >  1 file changed, 35 insertions(+)
> >> >  create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> >> >
> >> > diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> >> > new file mode 100644
> >> > index 0000000..16141bd
> >> > --- /dev/null
> >> > +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
> >> > @@ -0,0 +1,35 @@
> >> > +Xilinx LogiCORE Partial Reconfig Decoupler Softcore
> >> > +
> >> > +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
> >> > +decouplers / fpga bridges.
> >> > +The controller can decouple/disable the bridges which prevents signal
> >> > +changes from passing through the bridge.  The controller can also
> >> > +couple / enable the bridges which allows traffic to pass through the
> >> > +bridge normally.
> >> > +
> >> > +The Driver supports only MMIO handling. A PR region can have multiple
> >> > +PR Decouples which can bhe handled independently or chaines via decouple/
> >>
> >> s/chaines/chains/
> >
> > Fixed in v4.
> >
> >> > +decouple_status signals.
> >> > +
> >> > +Required properties:
> >> > +- compatible               : Should contain "xlnx,pr-decoupler-1.00"
> >> > +- regs                     : base address and size for decoupler module
> >> > +- clocks           : input clock to IP
> >> > +- clock-names              : should contain "aclk"
> >> > +
> >> > +Optional properties:
> >> > +- bridge-enable            : 0 if driver should disable bridge at startup
> >> > +                     1 if driver should enable bridge at startup
> >> > +                     Default is to leave bridge in current state.
> >>
> >> This is common and should move into a common doc. Maybe fpga-region.txt
> >> works?
> >
> > Ok will add patch for that to v5 series.
> 
> Arg, our emails criss-crossed.  I've already sent v4 to Greg.  I hope
> we don't need v5 for this one thing.  bridge-enable is common for the
> fpga bridges (altera-fpga2sdram-bridge.txt, altera-freeze-bridge.txt,
> altera-hps2fpga-bridge.txt, xilinx-pr-decoupler.txt).  Probably we
> need a new patch to move this common bridges binding from all the
> above to fpga-region.txt or create a new fpga-bridges.txt.  At first
> blush, I prefer the later.

Yeah, I'll just send a follow-up patch, it's not that it breaks anything
the way it is.

- Moritz

Patch hide | download patch | download mbox

diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
new file mode 100644
index 0000000..16141bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt
@@ -0,0 +1,35 @@ 
+Xilinx LogiCORE Partial Reconfig Decoupler Softcore
+
+The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
+decouplers / fpga bridges.
+The controller can decouple/disable the bridges which prevents signal
+changes from passing through the bridge.  The controller can also
+couple / enable the bridges which allows traffic to pass through the
+bridge normally.
+
+The Driver supports only MMIO handling. A PR region can have multiple
+PR Decouples which can bhe handled independently or chaines via decouple/
+decouple_status signals.
+
+Required properties:
+- compatible		: Should contain "xlnx,pr-decoupler-1.00"
+- regs			: base address and size for decoupler module
+- clocks		: input clock to IP
+- clock-names		: should contain "aclk"
+
+Optional properties:
+- bridge-enable		: 0 if driver should disable bridge at startup
+			  1 if driver should enable bridge at startup
+			  Default is to leave bridge in current state.
+
+See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings.
+
+Example:
+	fpga-bridge@100000450 {
+		compatible = "xlnx,pr-decoupler-1.00",
+			     "xlnx-pr-decoupler";
+		regs = <0x10000045 0x10>;
+		clocks = <&clkc 15>;
+		clock-names = "aclk";
+		bridge-enable = <0>;
+	};