netdev - RE: [PATCH RFC v1] net: dsa: microchip: add KSZ9477 I2C driver

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Date:   Fri, 18 Jan 2019 20:25:14 +0000
From:   <Tristram.Ha@...rochip.com>
To:     <marex@...x.de>
CC:     <vivien.didelot@...oirfairelinux.com>,
        <UNGLinuxDriver@...rochip.com>, <netdev@...r.kernel.org>,
        <f.fainelli@...il.com>, <andrew@...n.ch>,
        <dan.carpenter@...cle.com>, <pavel@....cz>,
        <sergio.paracuellos@...il.com>
Subject: RE: [PATCH RFC v1] net: dsa: microchip: add KSZ9477 I2C driver

> > +#define REG_SIZE			0x8000
> > +
> > +#define I2C_REGMAP_VAL			8
> > +#define I2C_REGMAP_REG			16
> > +
> > +#define KSZ_REGMAP_COMMON(n, width)
> 		\
> > +{									\
> > +	.name			= n,					\
> > +	.max_register		= REG_SIZE - (width),			\
> > +	.reg_bits		= I2C_REGMAP_REG,			\
> > +	.val_bits		= I2C_REGMAP_VAL * (width),		\
> > +	.reg_stride		= (width),				\
> > +	.reg_format_endian	= REGMAP_ENDIAN_BIG,
> 	\
> > +	.val_format_endian	= REGMAP_ENDIAN_BIG,
> 	\
> > +}
> This comes from my regmap RFC series, right ? Why do we need to redefine
> it here again ?

This is different from the SPI version.  The variables pad_bits, read_flag_mask, and write_flag_mask are not used.  reg_bits is also different.

For KSZ8795 SPI the differences are SPI_ADDR_S, SPI_TURNAROUND_S, and SPI_CMD_LEN.