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Message-Id: <20201226001649.2061703-3-gsomlo@gmail.com>
Date: Fri, 25 Dec 2020 19:16:48 -0500
From: Gabriel Somlo <gsomlo@...il.com>
To: shorne@...il.com, mholenko@...micro.com, kgugala@...micro.com
Cc: linux-kernel@...r.kernel.org, pczarnecki@...ernships.antmicro.com,
f.kermarrec@...il.com, gregkh@...uxfoundation.org, gsomlo@...il.com
Subject: [PATCH v4 2/3] drivers/soc/litex: separate MMIO from subregister offset calculation
Separate MMIO (read/write) access into _[read|write]_litex_subregister()
static inline functions, leaving existing "READ|WRITE" macros to handle
calculation of the subregister offset only.
NOTE: this is a non-functional change.
Signed-off-by: Gabriel Somlo <gsomlo@...il.com>
---
include/linux/litex.h | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/linux/litex.h b/include/linux/litex.h
index 67c1a18a7425..918bab45243c 100644
--- a/include/linux/litex.h
+++ b/include/linux/litex.h
@@ -24,11 +24,23 @@
#define LITEX_SUBREG_SIZE 0x1
#define LITEX_SUBREG_SIZE_BIT (LITEX_SUBREG_SIZE * 8)
+static inline void _write_litex_subregister(u32 val, void __iomem *addr)
+{
+ writel((u32 __force)cpu_to_le32(val), addr);
+}
+
+static inline u32 _read_litex_subregister(void __iomem *addr)
+{
+ return le32_to_cpu((__le32 __force)readl(addr));
+}
+
#define WRITE_LITEX_SUBREGISTER(val, base_offset, subreg_id) \
- writel((u32 __force)cpu_to_le32(val), base_offset + (LITEX_REG_SIZE * subreg_id))
+ _write_litex_subregister(val, (base_offset) + \
+ LITEX_REG_SIZE * (subreg_id))
#define READ_LITEX_SUBREGISTER(base_offset, subreg_id) \
- le32_to_cpu((__le32 __force)readl(base_offset + (LITEX_REG_SIZE * subreg_id)))
+ _read_litex_subregister((base_offset) + \
+ LITEX_REG_SIZE * (subreg_id))
/*
* LiteX SoC Generator, depending on the configuration, can split a single
--
2.26.2
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