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drivers/soc/litex: separate MMIO from subregister offset calculation

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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@gmail.com>
Signed-off-by: Stafford Horne <shorne@gmail.com>
This commit is contained in:
Gabriel Somlo 2021-01-12 12:31:41 -05:00 committed by Stafford Horne
parent 9d93a9e8aa
commit b5d3061ea2
1 changed files with 14 additions and 2 deletions
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16
include/linux/litex.h
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@ -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