Re: [PATCH 0/3] nvmem: eeprom: add support for FRAM
On 09. 04. 21 19:21, Christian Eggers wrote: Hi Jiri, I have two Fujitsu different FRAMs running with the stock at25 driver. I set the page size equal to the device size (as FRAMs have no pages). Are you able to run your FRAM with the unmodified driver? I assume that getting the device geometry from the chip is vendor specific (in contrast to flash devices which have standard commands for this). I suppose that there is no much value getting vendor specific information from a chip. If the drivers knows the vendor, it should also know the chip (e.g. from the dt). Hi Christian, main purpose of this patch is to get serial number from this chip. I don't have it done yet, in older kernels I expose it as separate file in sysfs, but in this kernel no luck. So a post first things while I'm working on sernum exposing. Does your chip has serial number? Can you read it? Any help welcomed. Thanks Jiri PS: If standard EEPROMs has some commands to get size etc., why it's not used? I guess that size is increased as time goes while board is still the same, so isn't it annoying changing dt every new lot with bigger eeproms.
Re: [PATCH 0/3] nvmem: eeprom: add support for FRAM
Hi Jiri, I have two Fujitsu different FRAMs running with the stock at25 driver. I set the page size equal to the device size (as FRAMs have no pages). Are you able to run your FRAM with the unmodified driver? I assume that getting the device geometry from the chip is vendor specific (in contrast to flash devices which have standard commands for this). I suppose that there is no much value getting vendor specific information from a chip. If the drivers knows the vendor, it should also know the chip (e.g. from the dt). regards Christian On Friday, 9 April 2021, 17:47:17 CEST, Jiri Prchal wrote: > Adds sopport for Cypress FRAMs. > > Jiri Prchal (3): > nvmem: eeprom: at25: add support for FRAM > nvmem: eeprom: at25: add support for FRAM > nvmem: eeprom: add documentation for FRAM > > .../devicetree/bindings/eeprom/at25.yaml | 12 +- > drivers/misc/eeprom/Kconfig | 5 +- > drivers/misc/eeprom/at25.c| 151 ++ > drivers/nvmem/core.c | 4 + > include/linux/nvmem-provider.h| 1 + > 5 files changed, 139 insertions(+), 34 deletions(-) > >
[PATCH 0/3] nvmem: eeprom: add support for FRAM
Adds sopport for Cypress FRAMs. Jiri Prchal (3): nvmem: eeprom: at25: add support for FRAM nvmem: eeprom: at25: add support for FRAM nvmem: eeprom: add documentation for FRAM .../devicetree/bindings/eeprom/at25.yaml | 12 +- drivers/misc/eeprom/Kconfig | 5 +- drivers/misc/eeprom/at25.c| 151 ++ drivers/nvmem/core.c | 4 + include/linux/nvmem-provider.h| 1 + 5 files changed, 139 insertions(+), 34 deletions(-) -- 2.25.1
