[PATCH 0/3] Add 'external mode' for GPIO-based FSI master

From: Jeremy Kerr
Date: Mon Jun 19 2017 - 05:28:03 EST

This series (on top of current char-misc-next) implements "external
mode" (ie, support for FSI debug devices) for the GPIO-based FSI master

We implement this control in the GPIO master driver, as it has the
mapping of raw GPIO pins to fsi control signals, and provides a
mechanism for the kernel to retain exclusive access to those GPIOs.



Jeremy Kerr (3):
fsi: Add fsi_master_rescan()
fsi/master-gpio: Add locking around gpio operations during break &
link enable
fsi/master-gpio: Add external mode

.../ABI/testing/sysfs-driver-fsi-master-gpio | 10 +++
drivers/fsi/fsi-core.c | 9 ++-
drivers/fsi/fsi-master-gpio.c | 85 +++++++++++++++++++++-
drivers/fsi/fsi-master.h | 2 +
4 files changed, 102 insertions(+), 4 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-fsi-master-gpio