linux-kernel - [PATCHv4 0/2] regulator: handling of error conditions for usb drivers

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Date:   Thu, 15 Dec 2016 17:29:53 +0100
From:   Axel Haslam <ahaslam@...libre.com>
To:     broonie@...nel.org, lgirdwood@...il.com, khilman@...libre.com,
        nsekhar@...com, david@...hnology.com, robh+dt@...nel.org
Cc:     linux-kernel@...r.kernel.org, Axel Haslam <ahaslam@...libre.com>
Subject: [PATCHv4 0/2] regulator: handling of error conditions for usb drivers

Some usb drivers rely on external power switches/regulators
for the port vbus, and some of these drivers are still using
a plain gpio to control the enable and over current
indicator pins.

To make these drivers more generic, we can use a regulator
to handle vbus, and send and over current event, but we are
missing a way to transmit the over current pin status, which
the usb layer may poll at any time.

These patches extend the fixed regulator driver to handle an optional
over current gpio pin.

Changes v3.1 -> 4
* register irq after regulator (Mark)

Changes v3 -> 3.1
* added Acked-by for DT bindings

Changes v2 -> v3
* dropped merged patch to add new API
* rebased on top of regulator-next

Changes v1->v2
* add new API to get error status instead of extending events (Mark)
* use gpiod for fixed regulator: This spears us extra platform
  data and bindings

Axel Haslam (2):
  regulator: fixed: dt: Allow an optional over current pin
  regulator: fixed: Handle optional overcurrent pin

 .../bindings/regulator/fixed-regulator.txt         |  2 +
 drivers/regulator/fixed.c                          | 56 ++++++++++++++++++++++
 2 files changed, 58 insertions(+)

-- 
2.9.3