On Wed, Oct 23, 2019 at 10:49 AM Vignesh Raghavendra vigneshr@ti.com wrote:
Hi Jagan,
On 23/10/19 12:00 AM, Jagan Teki wrote:
Hi Vignesh,
On Fri, Oct 11, 2019 at 1:28 PM Vignesh Raghavendra vigneshr@ti.com wrote:
n25q* and mt25q* (both 256Mb and 512Mb) flashes support Flag status register that indicates various errors that may be encountered during erase/write operations. Therefore add USE_FSR flag wherever missing.
Does 256Mb require FSR? I remember Micron die is created after 512Mb where it creates die between two 256Mb on 512Mb flash. Indeed die switching would require FSR.
Flag Status Register(FSR) is not for switching die but for looking up and printing out reason for write/erase failure. And yes 256Mb part does support FSR. See datasheet at: https://www.micron.com/-/media/client/global/documents/products/data-sheet/n... Table 17: Flag Status Register Bit Definition
https://www.mouser.com/datasheet/2/671/MT25Q_QLJS_U_256_ABA_0-1387271.pdf Table 5: Flag Status Register
Yes, I have seen these. I remember it wasn't require FSR when I did a test on zynq qspi last time. may be it can't consistent between all IP's