Re: [PATCH v6 6/9] dt-bindings: connector: m2: Add M.2 1620 LGA soldered down connector

[Rob Herring]

On Mon, Mar 23, 2026 at 7:16 AM Manivannan Sadhasivam <mani@xxxxxxxxxx> wrote:
>
> On Sun, Mar 22, 2026 at 06:37:13PM -0500, Rob Herring wrote:
> > On Tue, Mar 17, 2026 at 09:59:56AM +0530, Manivannan Sadhasivam wrote:
> > > Lenovo Thinkpad T14s is found to have a soldered down version of M.2 1620
> > > LGA connector. Though, there is no 1620 LGA form factor defined in the M.2
> > > spec, it looks very similar to the M.2 Key E connector. So add the
> > > "pcie-m2-1620-lga-connector" compatible with "pcie-m2-e-connector" fallback
> > > to reuse the Key E binding.
> >
> > What is LGA?
> >
>
> Land Grid Array
>
> > If not in the spec, is it really something generic?
> >
>
> Good question. Yes and No! LGA is not something that Lenovo only uses. Other
> vendors may also use this form factor. PCIe connectors are full of innovation as
> the spec gives room for hardware designers to be as innovative as possible to
> save the BOM cost.

innovation == incompatible changes

> This is why I do not want to make it Lenovo specific. But if you prefer that, I
> can name it as "lenovo,pcie-m2-1620-lga-connector".

Depends if you think that s/w needs to know the differences. Hard to
say with a sample size of 1.

Rob