Adding upstream version 6.7.7.upstream/6.7.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/media/pci/mgb4/mgb4_regs.c b/drivers/media/pci/mgb4/mgb4_regs.c
new file mode 100644
index 0000000000..53d4e4503a
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_regs.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#include <linux/ioport.h>
+#include "mgb4_regs.h"
+
+int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs)
+{
+	regs->mapbase = res->start;
+	regs->mapsize = res->end - res->start;
+
+	if (!request_mem_region(regs->mapbase, regs->mapsize, res->name))
+		return -EINVAL;
+	regs->membase = ioremap(regs->mapbase, regs->mapsize);
+	if (!regs->membase) {
+		release_mem_region(regs->mapbase, regs->mapsize);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void mgb4_regs_free(struct mgb4_regs *regs)
+{
+	iounmap(regs->membase);
+	release_mem_region(regs->mapbase, regs->mapsize);
+}