From: Roger Quadros <rogerq@ti.com>
To: <kishon@ti.com>
Cc: <aniljoy@cadence.com>, <adouglas@cadence.com>, <nsekhar@ti.com>,
<jsarha@ti.com>, <linux-kernel@vger.kernel.org>,
<devicetree@vger.kernel.org>, Roger Quadros <rogerq@ti.com>
Subject: [PATCH v4 0/3] phy: cadence: j721e-wiz: Add Type-C plug flip support
Date: Mon, 28 Oct 2019 12:21:50 +0200 [thread overview]
Message-ID: <20191028102153.24866-1-rogerq@ti.com> (raw)
Hi,
On J721e platform, the 2 lanes of SERDES PHY are used to achieve
USB Type-C plug flip support without any additional MUX component
by using a lane swap feature.
However, the driver needs to know the Type-C plug orientation before
it can decide whether to swap the lanes or not. This is achieved via a
GPIO named DIR.
Another constraint is that the lane swap must happen only when the PHY
is in inactive state. This is achieved by sampling the GPIO and
programming the lane swap before bringing the PHY out of reset.
This series adds support to read the GPIO and accordingly program
the Lane swap for Type-C plug flip support.
Series must be applied on top of
https://lkml.org/lkml/2019/10/23/589
cheers,
-roger
Changelog:
v4
- fixes in dt-binding document
- fix typo
- change to typec-dir-debounce-ms and add min/max/default values
- drop reference to uint32 type
- fixes in driver
- change to updated typec-dir-debounce-ms property
- add limit checks and use default value if not specified
v3
- Rebase on v2 of PHY series and update DT binding to yaml
v2
- revise commit log of patch 1
- use regmap_field in patch 3
Roger Quadros (3):
phy: cadence: Sierra: add phy_reset hook
dt-bindings: phy: ti,phy-j721e-wiz: Add Type-C dir GPIO
phy: ti: j721e-wiz: Manage typec-gpio-dir
.../bindings/phy/ti,phy-j721e-wiz.yaml | 17 ++++++
drivers/phy/cadence/phy-cadence-sierra.c | 10 +++
drivers/phy/ti/phy-j721e-wiz.c | 61 +++++++++++++++++++
3 files changed, 88 insertions(+)
--
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next reply other threads:[~2019-10-28 10:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 10:21 Roger Quadros [this message]
2019-10-28 10:21 ` [PATCH v4 1/3] phy: cadence: Sierra: add phy_reset hook Roger Quadros
2019-10-28 10:21 ` [PATCH v4 2/3] dt-bindings: phy: ti,phy-j721e-wiz: Add Type-C dir GPIO Roger Quadros
2019-11-05 1:28 ` Rob Herring
2019-10-28 10:21 ` [PATCH v4 3/3] phy: ti: j721e-wiz: Manage typec-gpio-dir Roger Quadros
2019-12-09 9:49 ` [PATCH v4 0/3] phy: cadence: j721e-wiz: Add Type-C plug flip support Roger Quadros
2020-01-06 6:34 ` Kishon Vijay Abraham I
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