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

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Date:   Mon, 19 Jun 2017 17:26:42 +0800
From:   Jeremy Kerr <jk@...abs.org>
To:     linux-kernel@...r.kernel.org
Cc:     Joel Stanley <joel@....id.au>,
        Christopher Bostic <cbostic@...ux.vnet.ibm.com>,
        Jeremy Kerr <jk@...abs.org>
Subject: [PATCH 0/3] Add 'external mode' for GPIO-based FSI master

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

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.

Cheers,


Jeremy

---
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

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2.7.4