On Wed, May 20, 2020 at 04:45:44PM +0200, Michal Kubecek wrote: > On Wed, May 20, 2020 at 08:29:14AM +0200, Oleksij Rempel wrote: > > Signal Quality Index is a mandatory value required by "OPEN Alliance > > SIG" for the 100Base-T1 PHYs [1]. This indicator can be used for cable > > integrity diagnostic and investigating other noise sources and > > implement by at least two vendors: NXP[2] and TI[3]. > > > > [1] > > http://www.opensig.org/download/document/218/Advanced_PHY_features_for_automotive_Ethernet_V1.0.pdf > > [2] https://www.nxp.com/docs/en/data-sheet/TJA1100.pdf > > [3] https://www.ti.com/product/DP83TC811R-Q1 > > > > Signed-off-by: Oleksij Rempel <o.rem...@pengutronix.de> > > --- > > This looks good to me, there is just one thing I'm not sure about: > > > diff --git a/include/linux/phy.h b/include/linux/phy.h > > index 59344db43fcb1..950ba479754bd 100644 > > --- a/include/linux/phy.h > > +++ b/include/linux/phy.h > > @@ -706,6 +706,8 @@ struct phy_driver { > > struct ethtool_tunable *tuna, > > const void *data); > > int (*set_loopback)(struct phy_device *dev, bool enable); > > + int (*get_sqi)(struct phy_device *dev); > > + int (*get_sqi_max)(struct phy_device *dev); > > }; > > #define to_phy_driver(d) container_of(to_mdio_common_driver(d), > > \ > > struct phy_driver, mdiodrv) > > I'm not sure if it's a good idea to define two separate callbacks. It > means adding two pointers instead of one (for every instance of the > structure, not only those implementing them), doing two calls, running > the same checks twice, locking twice, checking the result twice. > > Also, passing a structure pointer would mean less code changed if we > decide to add more related state values later. > > What do you think? > > If you don't agree, I have no objections so > > Reviewed-by: Michal Kubecek <mkube...@suse.cz>
I have no strong opinion on it. Should I rework it? -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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