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    Subject[PATCH v7 19/29] fpga: dfl: fme-mgr: add compat_id support
    Date
    This patch adds compat_id support to fme manager driver, it
    reads the ID from the hardware register. And it could be used
    for compatibility check before partial reconfiguration.

    Signed-off-by: Wu Hao <hao.wu@intel.com>
    Acked-by: Alan Tull <atull@kernel.org>
    Acked-by: Moritz Fischer <mdf@kernel.org>
    ---
    v6: add Acked-by from Alan.
    v7: add Acked-by from Moritz.
    ---
    drivers/fpga/dfl-fme-mgr.c | 15 +++++++++++++++
    1 file changed, 15 insertions(+)

    diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
    index df843b5..b5ef405 100644
    --- a/drivers/fpga/dfl-fme-mgr.c
    +++ b/drivers/fpga/dfl-fme-mgr.c
    @@ -272,9 +272,17 @@ static u64 fme_mgr_status(struct fpga_manager *mgr)
    .status = fme_mgr_status,
    };

    +static void fme_mgr_get_compat_id(void __iomem *fme_pr,
    + struct fpga_compat_id *id)
    +{
    + id->id_l = readq(fme_pr + FME_PR_INTFC_ID_L);
    + id->id_h = readq(fme_pr + FME_PR_INTFC_ID_H);
    +}
    +
    static int fme_mgr_probe(struct platform_device *pdev)
    {
    struct dfl_fme_mgr_pdata *pdata = dev_get_platdata(&pdev->dev);
    + struct fpga_compat_id *compat_id;
    struct device *dev = &pdev->dev;
    struct fme_mgr_priv *priv;
    struct fpga_manager *mgr;
    @@ -295,11 +303,18 @@ static int fme_mgr_probe(struct platform_device *pdev)
    return PTR_ERR(priv->ioaddr);
    }

    + compat_id = devm_kzalloc(dev, sizeof(*compat_id), GFP_KERNEL);
    + if (!compat_id)
    + return -ENOMEM;
    +
    + fme_mgr_get_compat_id(priv->ioaddr, compat_id);
    +
    mgr = fpga_mgr_create(dev, "DFL FME FPGA Manager",
    &fme_mgr_ops, priv);
    if (!mgr)
    return -ENOMEM;

    + mgr->compat_id = compat_id;
    platform_set_drvdata(pdev, mgr);

    ret = fpga_mgr_register(mgr);
    --
    1.8.3.1
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