linux-kernel - Re: [PATCH v5 4/4] fpga pr ip: Platform driver for Altera Partial Reconfiguration IP.

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Message-ID: <CAAtXAHfvFamErNKiSqvKMk2C_6fNH5dkdkq5i_G26j9XLpOGPA@mail.gmail.com>
Date:   Mon, 13 Mar 2017 13:48:55 -0700
From:   Moritz Fischer <moritz.fischer@...us.com>
To:     matthew.gerlach@...ux.intel.com
Cc:     Alan Tull <atull@...nel.org>, linux-fpga@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Anatolij Gustschin <agust@...x.de>
Subject: Re: [PATCH v5 4/4] fpga pr ip: Platform driver for Altera Partial
 Reconfiguration IP.

On Fri, Mar 10, 2017 at 11:40 AM,  <matthew.gerlach@...ux.intel.com> wrote:
> From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
>
> This adds a platform bus driver for a fpga-mgr driver
> that uses the Altera Partial Reconfiguration IP component.
>
> Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Reviewed-by: Moritz Fischer <mdf@...nel.org>
> ---
> v5: fix comment as suggested by Rob Herring <robh@...nel.org>
> v4: v3 patch set mistakenly sent out labeled as v4
> v3:
>     s/altr,pr-ip/altr,a10-pr-ip/
>     s/alt_pr_probe/alt_pr_register/
>     s/alt_pr_remove/alt_pr_unregister/
>     fix error found by kbuild robot with more precise Kconfig depends
>
> v2: s/altr,pr-ip-core/altr,pr-ip/
> ---
>  drivers/fpga/Kconfig                  |  7 ++++
>  drivers/fpga/Makefile                 |  1 +
>  drivers/fpga/altera-pr-ip-core-plat.c | 65 +++++++++++++++++++++++++++++++++++
>  3 files changed, 73 insertions(+)
>  create mode 100644 drivers/fpga/altera-pr-ip-core-plat.c
>
> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> index a46c173..0c51427 100644
> --- a/drivers/fpga/Kconfig
> +++ b/drivers/fpga/Kconfig
> @@ -68,6 +68,13 @@ config ALTERA_PR_IP_CORE
>          help
>            Core driver support for Altera Partial Reconfiguration IP component
>
> +config ALTERA_PR_IP_CORE_PLAT
> +       tristate "Platform support of Altera Partial Reconfiguration IP Core"
> +       depends on ALTERA_PR_IP_CORE && OF && HAS_IOMEM
> +       help
> +         Platform driver support for Altera Partial Reconfiguration IP
> +         component
> +
>  endif # FPGA
>
>  endmenu
> diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> index 82693d2..5b8ae2b 100644
> --- a/drivers/fpga/Makefile
> +++ b/drivers/fpga/Makefile
> @@ -10,6 +10,7 @@ obj-$(CONFIG_FPGA_MGR_SOCFPGA)                += socfpga.o
>  obj-$(CONFIG_FPGA_MGR_SOCFPGA_A10)     += socfpga-a10.o
>  obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA)       += zynq-fpga.o
>  obj-$(CONFIG_ALTERA_PR_IP_CORE)         += altera-pr-ip-core.o
> +obj-$(CONFIG_ALTERA_PR_IP_CORE_PLAT)    += altera-pr-ip-core-plat.o
>
>  # FPGA Bridge Drivers
>  obj-$(CONFIG_FPGA_BRIDGE)              += fpga-bridge.o
> diff --git a/drivers/fpga/altera-pr-ip-core-plat.c b/drivers/fpga/altera-pr-ip-core-plat.c
> new file mode 100644
> index 0000000..cff189a
> --- /dev/null
> +++ b/drivers/fpga/altera-pr-ip-core-plat.c
> @@ -0,0 +1,65 @@
> +/*
> + * Driver for Altera Partial Reconfiguration IP Core
> + *
> + * Copyright (C) 2016-2017 Intel Corporation
> + *
> + * Based on socfpga-a10.c Copyright (C) 2015-2016 Altera Corporation
> + *  by Alan Tull <atull@...nsource.altera.com>
> + *
> + * 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.
> + *
> + * This program is distributed in the hope 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.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +#include "altera-pr-ip-core.h"
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +
> +static int alt_pr_platform_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       void __iomem *reg_base;
> +       struct resource *res;
> +
> +       /* First mmio base is for register access */
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +
> +       reg_base = devm_ioremap_resource(dev, res);
> +
> +       if (IS_ERR(reg_base))
> +               return PTR_ERR(reg_base);
> +
> +       return alt_pr_register(dev, reg_base);
> +}
> +
> +static int alt_pr_platform_remove(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +
> +       return alt_pr_unregister(dev);
> +}
> +
> +static const struct of_device_id alt_pr_of_match[] = {
> +       { .compatible = "altr,a10-pr-ip", },
> +       {},
> +};
> +
> +MODULE_DEVICE_TABLE(of, alt_pr_of_match);
> +
> +static struct platform_driver alt_pr_platform_driver = {
> +       .probe = alt_pr_platform_probe,
> +       .remove = alt_pr_platform_remove,
> +       .driver = {
> +               .name   = "alt_a10_pr_ip",
> +               .of_match_table = alt_pr_of_match,
> +       },
> +};
> +
> +module_platform_driver(alt_pr_platform_driver);
> --
> 2.7.4
>

Thanks,
Moritz Fischer