From 5ebae801d960d46e39574cb83ec24ab44d1a6c2a Mon Sep 17 00:00:00 2001
From: Wu Hao <hao.wu@intel.com>
Date: Sat, 30 Jun 2018 08:53:26 +0800
Subject: [PATCH] fpga: dfl: fme-mgr: add compat_id support
Git-commit: 5ebae801d960d46e39574cb83ec24ab44d1a6c2a
Patch-mainline: v4.19-rc1
References: FATE#326235

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 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 df843b51c663..b5ef405b6d88 100644
--- a/drivers/fpga/dfl-fme-mgr.c
+++ b/drivers/fpga/dfl-fme-mgr.c
@@ -272,9 +272,17 @@ static const struct fpga_manager_ops fme_mgr_ops = {
 	.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);
-- 
2.16.4