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net: dsa: microchip: Factor out regmap config generation into common header

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The regmap config tables are rather similar for various generations of
the KSZ8xxx/KSZ9xxx switches. Introduce a macro which allows generating
those tables without duplication. Note that $regalign parameter is not
used right now, but will be used in KSZ87xx series switches.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Tristram Ha <Tristram.Ha@microchip.com>
Cc: Woojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marek Vasut 2019-06-26 01:43:47 +02:00 committed by David S. Miller
parent ee394fea6f
commit 255b59ad0d
2 changed files with 35 additions and 26 deletions
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29
drivers/net/dsa/microchip/ksz9477_spi.c
View File

@ -14,37 +14,14 @@
#include <linux/spi/spi.h>
#include "ksz_priv.h"
#include "ksz_common.h"
#define SPI_ADDR_SHIFT 24
#define SPI_ADDR_ALIGN 3
#define SPI_TURNAROUND_SHIFT 5
/* SPI frame opcodes */
#define KS_SPIOP_RD 3
#define KS_SPIOP_WR 2
#define KS_SPIOP_FLAG_MASK(opcode) \
swab32((opcode) << (SPI_ADDR_SHIFT + SPI_TURNAROUND_SHIFT))
#define KSZ_REGMAP_COMMON(width) \
{ \
.val_bits = (width), \
.reg_stride = (width) / 8, \
.reg_bits = SPI_ADDR_SHIFT + SPI_ADDR_ALIGN, \
.pad_bits = SPI_TURNAROUND_SHIFT, \
.max_register = BIT(SPI_ADDR_SHIFT) - 1, \
.cache_type = REGCACHE_NONE, \
.read_flag_mask = KS_SPIOP_FLAG_MASK(KS_SPIOP_RD), \
.write_flag_mask = KS_SPIOP_FLAG_MASK(KS_SPIOP_WR), \
.reg_format_endian = REGMAP_ENDIAN_BIG, \
.val_format_endian = REGMAP_ENDIAN_BIG \
}
static const struct regmap_config ksz9477_regmap_config[] = {
KSZ_REGMAP_COMMON(8),
KSZ_REGMAP_COMMON(16),
KSZ_REGMAP_COMMON(32),
};
KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT,
SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN);
static int ksz9477_spi_probe(struct spi_device *spi)
{

32
drivers/net/dsa/microchip/ksz_common.h
View File

@ -133,4 +133,36 @@ static inline u32 ksz_pread32_poll(struct ksz_poll_ctx *ctx)
return data;
}
/* Regmap tables generation */
#define KSZ_SPI_OP_RD 3
#define KSZ_SPI_OP_WR 2
#define KSZ_SPI_OP_FLAG_MASK(opcode, swp, regbits, regpad) \
swab##swp((opcode) << ((regbits) + (regpad)))
#define KSZ_REGMAP_ENTRY(width, swp, regbits, regpad, regalign) \
{ \
.val_bits = (width), \
.reg_stride = (width) / 8, \
.reg_bits = (regbits) + (regalign), \
.pad_bits = (regpad), \
.max_register = BIT(regbits) - 1, \
.cache_type = REGCACHE_NONE, \
.read_flag_mask = \
KSZ_SPI_OP_FLAG_MASK(KSZ_SPI_OP_RD, swp, \
regbits, regpad), \
.write_flag_mask = \
KSZ_SPI_OP_FLAG_MASK(KSZ_SPI_OP_WR, swp, \
regbits, regpad), \
.reg_format_endian = REGMAP_ENDIAN_BIG, \
.val_format_endian = REGMAP_ENDIAN_BIG \
}
#define KSZ_REGMAP_TABLE(ksz, swp, regbits, regpad, regalign) \
static const struct regmap_config ksz##_regmap_config[] = { \
KSZ_REGMAP_ENTRY(8, swp, (regbits), (regpad), (regalign)), \
KSZ_REGMAP_ENTRY(16, swp, (regbits), (regpad), (regalign)), \
KSZ_REGMAP_ENTRY(32, swp, (regbits), (regpad), (regalign)), \
}
#endif