#define XXX_REG_STATUS	0x06
#define XXX_REG_CTRL0	0x07
#define XXX_REG_CTRL1	0x08

static bool xxx_is_writeable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case XXX_REG_CTRL0:
	case XXX_REG_CTRL1:
		return true;
	default:
		return false;
	}
}

static bool xxx_is_readable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case XXX_REG_XOUT_L:
	case XXX_REG_XOUT_H:
	case XXX_REG_YOUT_L:
	case XXX_REG_YOUT_H:
	case XXX_REG_ZOUT_L:
	case XXX_REG_ZOUT_H:
	case XXX_REG_STATUS:
	case XXX_REG_ID:
		return true;
	default:
		return false;
	}
}

static bool xxx_is_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case XXX_REG_CTRL0:
	case XXX_REG_CTRL1:
	case XXX_REG_STATUS:
		return false;
	default:
		return true;
	}
}

static struct reg_default xxx_reg_defaults[] = {
	{ XXX_REG_CTRL0,  0x00 },
	{ XXX_REG_CTRL1,  0x00 },
	{ XXX_REG_STATUS, 0x00 },
};

static const struct regmap_config xxx_regmap_config = {
	.name = XXX_REGMAP_NAME,

	.reg_bits = 8,
	.val_bits = 8,

	.max_register = XXX_REG_ID,
	.cache_type = REGCACHE_RBTREE,

	.writeable_reg = xxx_is_writeable_reg,
	.readable_reg = xxx_is_readable_reg,
	.volatile_reg = xxx_is_volatile_reg,

	.reg_defaults = xxx_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(xxx_reg_defaults),
};