linux-kernel - [PATCH v6 3/5] drivers/soc/litex: s/LITEX_REG_SIZE/LITEX_SUBREG

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Message-Id: <20210112173144.4002594-4-gsomlo@gmail.com>
Date:   Tue, 12 Jan 2021 12:31:42 -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 v6 3/5] drivers/soc/litex: s/LITEX_REG_SIZE/LITEX_SUBREG_ALIGN/g

The constant LITEX_REG_SIZE is renamed to the more descriptive
LITEX_SUBREG_ALIGN (LiteX CSR subregisters are located at 32-bit
aligned MMIO addresses).

NOTE: this is a non-functional change.

Signed-off-by: Gabriel Somlo <gsomlo@...il.com>
---
 include/linux/litex.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/litex.h b/include/linux/litex.h
index 918bab45243c..c63a7e1a337c 100644
--- a/include/linux/litex.h
+++ b/include/linux/litex.h
@@ -20,10 +20,12 @@
  * Supporting other configurations will require extending the logic in this
  * header and in the LiteX SoC controller driver.
  */
-#define LITEX_REG_SIZE	  0x4
 #define LITEX_SUBREG_SIZE	0x1
 #define LITEX_SUBREG_SIZE_BIT	 (LITEX_SUBREG_SIZE * 8)
 
+/* LiteX subregisters of any width are always aligned on a 4-byte boundary */
+#define LITEX_SUBREG_ALIGN	  0x4
+
 static inline void _write_litex_subregister(u32 val, void __iomem *addr)
 {
 	writel((u32 __force)cpu_to_le32(val), addr);
@@ -36,11 +38,11 @@ static inline u32 _read_litex_subregister(void __iomem *addr)
 
 #define WRITE_LITEX_SUBREGISTER(val, base_offset, subreg_id) \
 	_write_litex_subregister(val, (base_offset) + \
-					LITEX_REG_SIZE * (subreg_id))
+					LITEX_SUBREG_ALIGN * (subreg_id))
 
 #define READ_LITEX_SUBREGISTER(base_offset, subreg_id) \
 	_read_litex_subregister((base_offset) + \
-					LITEX_REG_SIZE * (subreg_id))
+					LITEX_SUBREG_ALIGN * (subreg_id))
 
 /*
  * LiteX SoC Generator, depending on the configuration, can split a single
-- 
2.26.2