Messages in this thread | | | From | Guenter Roeck <> | Subject | Re: [PATCH v15 3/8] mfd: simple-mfd-i2c: Enable support for the silergy,sy7636a | Date | Wed, 24 Nov 2021 12:09:44 -0800 |
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On 11/24/21 11:35 AM, Andreas Kemnade wrote: > Hi, > > On Tue, 23 Nov 2021 07:39:05 -0800 > Guenter Roeck <linux@roeck-us.net> wrote: > >> On 11/23/21 4:14 AM, Alistair Francis wrote: >>> On Tue, Nov 16, 2021 at 9:10 AM Andreas Kemnade <andreas@kemnade.info> wrote: >>>> >>>> Hi, >>>> >>>> this all creates a lot of question marks... >>>> One of my main question is whether sy7636a = sy7636 (at least the >>>> driver in the kobo vendor kernels does not have the "A" at the end, >>>> whic does not necessarily mean a difference). >>>> >>>> https://www.silergy.com/products/panel_pmic >>>> lists only a SY7636ARMC, so chances are good that the letters were just >>>> stripped away by the driver developers. Printing on chip package is >>>> cryptic so it is not that helpful. It is just "BWNBDA" >>> >>> I don't have a definite answer for you. But I think it's sy7636a >>> >>> The page you linked to above lists SY7636ARMC as well as SY7627RMC, >>> SY7570RMC. That makes me think that the RMC is a generic suffix and >>> this actual IC is the SY7636A. >>> >> >> Almost all chips have an ordering suffix, indicating things like >> temperature range or packaging. The datasheet says: >> > yes, they have. The only question is where it starts. So did you find a > public datasheet which you can chere >
I registered an account on the Silergy web site, and I was subsequently able to download the datasheet. The document has a "confidential" watermark, so I can not share it. You should be able to register an account and download it yourself, though.
>> Ordering Information >> SY7636 □(□□)□ >> | Temperature Code (C) >> | Package Code (RM) >> | Optional Spec Code (A) >> >> The datasheet otherwise refers to the chip as SY7636A. >> > so there is no indication of something like this where the A really > makes a difference: >
I may be missing it, but I see nothing in the datasheet that would indicate that or if the "A" has any relevance other than "Optional Spec Code", and I do not see an explanation for that term either.
Guenter
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