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* fmc: Delete the FMC subsystemLinus Walleij2019-06-121-102/+0
| | | | | | | | | | | | | | | | | | | | | | | The FMC subsystem was created in 2012 with the ambition to drive development of drivers for this hardware upstream. The current implementation has architectural flaws and would need to be revamped using real hardware to something that can reuse existing kernel abstractions in the subsystems for e.g. I2C, FPGA and GPIO. We have concluded that for the mainline kernel it will be better to delete the subsystem and start over with a clean slate when/if an active maintainer steps up. For details see: https://lkml.org/lkml/2018/10/29/534 Suggested-by: Federico Vaga <federico.vaga@cern.ch> Cc: Pat Riehecky <riehecky@fnal.gov> Acked-by: Alessandro Rubini <rubini@gnudd.com> Signed-off-by: Federico Vaga <federico.vaga@cern.ch> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* fmc: Decouple from Linux GPIO subsystemLinus Walleij2019-06-101-1/+0
| | | | | | | | | | | FMC has its own GPIO handling, the inclusion of <linux/gpio.h> is only to reuse some flags that we can just as well provide using local defines. Cc: Federico Vaga <federico.vaga@cern.ch> Cc: Pat Riehecky <riehecky@fnal.gov> Acked-by: Alessandro Rubini <rubini@gnudd.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* drivers/fmc: hide fmc operations behind helpersFederico Vaga2017-08-281-12/+8
| | | | | | | | | | | | | This gave us more freedom to change/add/remove operations without recompiling all device driver. Typically, Carrier board implement the fmc operations, so they will not use these helpers. Signed-off-by: Federico Vaga <federico.vaga@cern.ch> Tested-by: Pat Riehecky <riehecky@fnal.gov> Acked-by: Alessandro Rubini <rubini@gnudd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* FMC: add a software mezzanine driverAlessandro Rubini2013-06-181-0/+107
This simple do-nothing mezzanine driver shows how to write a mezzanine driver, that can also handle interrupts reported by the carrier. Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Juan David Gonzalez Cobas <dcobas@cern.ch> Acked-by: Emilio G. Cota <cota@braap.org> Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>