Re: [PATCH v2 11/35] mtd: spi-nor: winbond: Use manufacturer late_init() for OTP ops
From: <hidden>
Date: 2021-10-01 12:01:05
On 9/10/21 12:50 AM, Michael Walle wrote:
EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe Am 2021-08-16 21:17, schrieb Pratyush Yadav:quoted
On 27/07/21 07:51AM, Tudor Ambarus wrote:quoted
OTP info is not yet discoverable via SFDP, use late_init() to init the OTP ops.What do you mean by the "yet"? Does it mean that OTP info is planned to be added to the next SFDP version? Or does it mean that it is possible to discover it via SFDP but we just don't support it yet?I've seen a bit (again in the XTX SFDP) which indicates it supports OTP. But thats all. It doesn't mention _how_ you can actually use it. And there are at least two different variants.
I've checked JEDEC Standard No. 216D.01, there are some OTP bits, but no OTP memory as we handle in SPI NOR. https://datasheet.lcsc.com/szlcsc/2005251034_XTX-XT25F128BSSIGT_C558844.pdf, Table 5, pg. 60 mentions something about Secured OTP, but that is a vendor table, we're good for now. cheers, ta _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel