linux-kernel - [PATCH v1] asm-generic: introduce be56 unaligned accessors

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Message-ID: <20240927083543.80275-1-marius.cristea@microchip.com>
Date: Fri, 27 Sep 2024 11:35:43 +0300
From: <marius.cristea@...rochip.com>
To: <arnd@...db.de>
CC: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<marius.cristea@...rochip.com>
Subject: [PATCH v1] asm-generic: introduce be56 unaligned accessors

From: Marius Cristea <marius.cristea@...rochip.com>

The PAC194X, IIO driver, is using some unaligned 56 bit registers.
Provide some helper accessors in preparation for the new driver.

Signed-off-by: Marius Cristea <marius.cristea@...rochip.com>
---
 include/asm-generic/unaligned.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
index a84c64e5f11e..d171a9f2377a 100644
--- a/include/asm-generic/unaligned.h
+++ b/include/asm-generic/unaligned.h
@@ -152,4 +152,31 @@ static inline u64 get_unaligned_be48(const void *p)
 	return __get_unaligned_be48(p);
 }
 
+static inline void __put_unaligned_be56(const u64 val, u8 *p)
+{
+	*p++ = (val >> 48) & 0xff;
+	*p++ = (val >> 40) & 0xff;
+	*p++ = (val >> 32) & 0xff;
+	*p++ = (val >> 24) & 0xff;
+	*p++ = (val >> 16) & 0xff;
+	*p++ = (val >> 8) & 0xff;
+	*p++ = val & 0xff;
+}
+
+static inline void put_unaligned_be56(const u64 val, void *p)
+{
+	__put_unaligned_be56(val, p);
+}
+
+static inline u64 __get_unaligned_be56(const u8 *p)
+{
+	return (u64)p[0] << 48 | (u64)p[1] << 40 | (u64)p[2] << 32 |
+		(u64)p[3] << 24 | p[4] << 16 | p[5] << 8 | p[6];
+}
+
+static inline u64 get_unaligned_be56(const void *p)
+{
+	return __get_unaligned_be56(p);
+}
+
 #endif /* __ASM_GENERIC_UNALIGNED_H */

base-commit: b82c1d235a30622177ce10dcb94dfd691a49922f
-- 
2.43.0