Commit 255b59ad authored by Marek Vasut's avatar Marek Vasut Committed by David S. Miller
Browse files

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



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: default avatarMarek 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: default avatarDavid S. Miller <davem@davemloft.net>
parent ee394fea

drivers/net/dsa/microchip/ksz9477_spi.c

+3 −26
Original line number Diff line number Diff line
@@ -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)

{

drivers/net/dsa/microchip/ksz_common.h

+32 −0
Original line number Diff line number Diff line
@@ -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

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