| Message ID | 20170201165358.45415-2-cbostic@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Chris, Jeremy, On Wed, Feb 1, 2017 at 5:53 PM, Christopher Bostic <cbostic@linux.vnet.ibm.com> wrote: > From: Jeremy Kerr <jk@ozlabs.org> > > This change adds the initial (empty) fsi bus definition, and introduces > drivers/fsi/. > > Signed-off-by: Jeremy Kerr <jk@ozlabs.org> > Signed-off-by: Chris Bostic <cbostic@us.ibm.com> > --- /dev/null > +++ b/drivers/fsi/Kconfig > @@ -0,0 +1,12 @@ > +# > +# FSI subsystem > +# > + > +menu "FSI support" > + > +config FSI > + tristate "FSI support" I guess this should depend on some POWER symbol || COMPILE_TEST? > + ---help--- > + FSI - the FRU Support Interface - is a simple bus for low-level > + access to POWER-based hardware. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
Hi Geert, >> --- /dev/null >> +++ b/drivers/fsi/Kconfig >> @@ -0,0 +1,12 @@ >> +# >> +# FSI subsystem >> +# >> + >> +menu "FSI support" >> + >> +config FSI >> + tristate "FSI support" > > I guess this should depend on some POWER symbol || COMPILE_TEST? No, this is pretty hardware-independent - all it requires on the HW side is two GPIOs. Although the FSI slave devices are typically only present on POWER systems, they can be driven from anything, with currently implementations being on ARM and 32-bit powerpc. Cheers, Jeremy
diff --git a/drivers/Kconfig b/drivers/Kconfig index e1e2066..117ca14c 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -202,4 +202,6 @@ source "drivers/hwtracing/intel_th/Kconfig" source "drivers/fpga/Kconfig" +source "drivers/fsi/Kconfig" + endmenu diff --git a/drivers/Makefile b/drivers/Makefile index f0afdfb..126e109 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -173,3 +173,4 @@ obj-$(CONFIG_STM) += hwtracing/stm/ obj-$(CONFIG_ANDROID) += android/ obj-$(CONFIG_NVMEM) += nvmem/ obj-$(CONFIG_FPGA) += fpga/ +obj-$(CONFIG_FSI) += fsi/ diff --git a/drivers/fsi/Kconfig b/drivers/fsi/Kconfig new file mode 100644 index 0000000..04c1a0e --- /dev/null +++ b/drivers/fsi/Kconfig @@ -0,0 +1,12 @@ +# +# FSI subsystem +# + +menu "FSI support" + +config FSI + tristate "FSI support" + ---help--- + FSI - the FRU Support Interface - is a simple bus for low-level + access to POWER-based hardware. +endmenu diff --git a/drivers/fsi/Makefile b/drivers/fsi/Makefile new file mode 100644 index 0000000..db0e5e7 --- /dev/null +++ b/drivers/fsi/Makefile @@ -0,0 +1,2 @@ + +obj-$(CONFIG_FSI) += fsi-core.o diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c new file mode 100644 index 0000000..3e45306 --- /dev/null +++ b/drivers/fsi/fsi-core.c @@ -0,0 +1,38 @@ +/* + * FSI core driver + * + * Copyright (C) IBM Corporation 2016 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/device.h> +#include <linux/fsi.h> +#include <linux/module.h> + +/* FSI core & Linux bus type definitions */ + +struct bus_type fsi_bus_type = { + .name = "fsi", +}; +EXPORT_SYMBOL_GPL(fsi_bus_type); + +static int fsi_init(void) +{ + return bus_register(&fsi_bus_type); +} + +static void fsi_exit(void) +{ + bus_unregister(&fsi_bus_type); +} + +module_init(fsi_init); +module_exit(fsi_exit); diff --git a/include/linux/fsi.h b/include/linux/fsi.h new file mode 100644 index 0000000..47aa181 --- /dev/null +++ b/include/linux/fsi.h @@ -0,0 +1,22 @@ +/* FSI device & driver interfaces + * + * Copyright (C) IBM Corporation 2016 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef LINUX_FSI_H +#define LINUX_FSI_H + +#include <linux/device.h> + +extern struct bus_type fsi_bus_type; + +#endif /* LINUX_FSI_H */