linux-kernel - [PATCH v2 1/4] fpga: altera-pr-ip: Add dummy definitions of API functions

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Message-ID: <20251105123752.93672-2-abbotti@mev.co.uk>
Date: Wed,  5 Nov 2025 12:31:05 +0000
From: Ian Abbott <abbotti@....co.uk>
To: linux-fpga@...r.kernel.org
Cc: Moritz Fischer <mdf@...nel.org>,
	Xu Yilun <yilun.xu@...el.com>,
	Tom Rix <trix@...hat.com>,
	linux-kernel@...r.kernel.org,
	Ian Abbott <abbotti@....co.uk>
Subject: [PATCH v2 1/4] fpga: altera-pr-ip: Add dummy definitions of API functions

Add a dummy definition of alt_pr_register() for build testing.

Signed-off-by: Ian Abbott <abbotti@....co.uk>
---
v2: (1) Add missing #endif.
    (2) Correct conditional compilation test for ALTERA_PR_IP_CORE
        tristate configuration.
---
 include/linux/fpga/altera-pr-ip-core.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/fpga/altera-pr-ip-core.h b/include/linux/fpga/altera-pr-ip-core.h
index a6b4c07858cc..f91b4cf918fb 100644
--- a/include/linux/fpga/altera-pr-ip-core.h
+++ b/include/linux/fpga/altera-pr-ip-core.h
@@ -11,7 +11,15 @@
 #ifndef _ALT_PR_IP_CORE_H
 #define _ALT_PR_IP_CORE_H
 #include <linux/io.h>
+#include <asm/errno.h>
 
+#if IS_ENABLED(CONFIG_ALTERA_PR_IP_CORE)
 int alt_pr_register(struct device *dev, void __iomem *reg_base);
+#else
+static inline int alt_pr_register(struct device *dev, void __iomem *reg_base)
+{
+	return -EOPNOTSUPP;
+}
+#endif
 
 #endif /* _ALT_PR_IP_CORE_H */
-- 
2.51.0