Linux-Amlogic Archive on lore.kernel.org
 help / color / Atom feed
* [PATCH v4 0/6] Add drive-strength in Meson pinctrl driver
@ 2019-05-09 16:29 Guillaume La Roque
  2019-05-09 16:29 ` [PATCH v4 1/6] dt-bindings: pinctrl: add a 'drive-strength-microamp' property Guillaume La Roque
                   ` (6 more replies)
  0 siblings, 7 replies; 10+ messages in thread
From: Guillaume La Roque @ 2019-05-09 16:29 UTC (permalink / raw)
  To: linus.walleij, khilman
  Cc: linux-gpio, devicetree, linux-amlogic, linux-kernel, jbrunet

The purpose of this patchset is to add drive-strength support in meson pinconf
driver. This is a new feature that was added on the g12a. It is critical for us
to support this since many functions are failing with default pad drive-strength.

The value achievable by the SoC are 0.5mA, 2.5mA, 3mA and 4mA and the DT property
'drive-strength' is expressed in mA.
So this patch add another generic property "drive-strength-uA". The change to do so
would be minimal and could be benefit to other platforms later on.

Cheers
Guillaume

Changes since v3:
- remove dev_err in meson_get_drive_strength
- cleanup code

Changes since v2:
- update driver-strength-uA property to be compliant with DT documentation
- rework patch series for better understanding
- rework set_bias function

Changes since v1:
- fix missing break
- implement new pinctrl generic property "drive-strength-uA"

[1] https://lkml.kernel.org/r/20190314163725.7918-1-jbrunet@baylibre.com

Guillaume La Roque (6):
  dt-bindings: pinctrl: add a 'drive-strength-microamp' property
  pinctrl: generic: add new 'drive-strength-microamp' property support
  dt-bindings: pinctrl: meson: Add drive-strength-microamp property
  pinctrl: meson: Rework enable/disable bias part
  pinctrl: meson: add support of drive-strength-microamp
  pinctrl: meson: g12a: add DS bank value

 .../bindings/pinctrl/meson,pinctrl.txt        |   4 +
 .../bindings/pinctrl/pinctrl-bindings.txt     |   3 +
 drivers/pinctrl/meson/pinctrl-meson-g12a.c    |  36 ++--
 drivers/pinctrl/meson/pinctrl-meson.c         | 180 ++++++++++++++----
 drivers/pinctrl/meson/pinctrl-meson.h         |  18 +-
 drivers/pinctrl/pinconf-generic.c             |   2 +
 include/linux/pinctrl/pinconf-generic.h       |   3 +
 7 files changed, 193 insertions(+), 53 deletions(-)

-- 
2.17.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply	[flat|nested] 10+ messages in thread
* [PATCH v4 0/6] Add drive-strength in Meson pinctrl driver
@ 2019-05-09 16:28 Guillaume La Roque
  0 siblings, 0 replies; 10+ messages in thread
From: Guillaume La Roque @ 2019-05-09 16:28 UTC (permalink / raw)
  To: linus.walleij, khilman
  Cc: linux-gpio, devicetree, linux-amlogic, linux-kernel, jbrunet

The purpose of this patchset is to add drive-strength support in meson pinconf
driver. This is a new feature that was added on the g12a. It is critical for us
to support this since many functions are failing with default pad drive-strength.

The value achievable by the SoC are 0.5mA, 2.5mA, 3mA and 4mA and the DT property
'drive-strength' is expressed in mA.
So this patch add another generic property "drive-strength-uA". The change to do so
would be minimal and could be benefit to other platforms later on.

Cheers
Guillaume

Changes since v3:
- remove dev_err in meson_get_drive_strength
- cleanup code

Changes since v2:
- update driver-strength-uA property to be compliant with DT documentation
- rework patch series for better understanding
- rework set_bias function

Changes since v1:
- fix missing break
- implement new pinctrl generic property "drive-strength-uA"

[1] https://lkml.kernel.org/r/20190314163725.7918-1-jbrunet@baylibre.com

Guillaume La Roque (6):
  dt-bindings: pinctrl: add a 'drive-strength-microamp' property
  pinctrl: generic: add new 'drive-strength-microamp' property support
  dt-bindings: pinctrl: meson: Add drive-strength-microamp property
  pinctrl: meson: Rework enable/disable bias part
  pinctrl: meson: add support of drive-strength-microamp
  pinctrl: meson: g12a: add DS bank value

 .../bindings/pinctrl/meson,pinctrl.txt        |   4 +
 .../bindings/pinctrl/pinctrl-bindings.txt     |   3 +
 drivers/pinctrl/meson/pinctrl-meson-g12a.c    |  36 ++--
 drivers/pinctrl/meson/pinctrl-meson.c         | 180 ++++++++++++++----
 drivers/pinctrl/meson/pinctrl-meson.h         |  18 +-
 drivers/pinctrl/pinconf-generic.c             |   2 +
 include/linux/pinctrl/pinconf-generic.h       |   3 +
 7 files changed, 193 insertions(+), 53 deletions(-)

-- 
2.17.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, back to index

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-05-09 16:29 [PATCH v4 0/6] Add drive-strength in Meson pinctrl driver Guillaume La Roque
2019-05-09 16:29 ` [PATCH v4 1/6] dt-bindings: pinctrl: add a 'drive-strength-microamp' property Guillaume La Roque
2019-05-09 17:35   ` Kevin Hilman
2019-05-09 16:29 ` [PATCH v4 2/6] pinctrl: generic: add new 'drive-strength-microamp' property support Guillaume La Roque
2019-05-09 16:29 ` [PATCH v4 3/6] dt-bindings: pinctrl: meson: Add drive-strength-microamp property Guillaume La Roque
2019-05-09 16:29 ` [PATCH v4 4/6] pinctrl: meson: Rework enable/disable bias part Guillaume La Roque
2019-05-09 16:29 ` [PATCH v4 5/6] pinctrl: meson: add support of drive-strength-microamp Guillaume La Roque
2019-05-09 16:29 ` [PATCH v4 6/6] pinctrl: meson: g12a: add DS bank value Guillaume La Roque
2019-05-09 17:34 ` [PATCH v4 0/6] Add drive-strength in Meson pinctrl driver Kevin Hilman
  -- strict thread matches above, loose matches on Subject: below --
2019-05-09 16:28 Guillaume La Roque

Linux-Amlogic Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-amlogic/0 linux-amlogic/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-amlogic linux-amlogic/ https://lore.kernel.org/linux-amlogic \
		linux-amlogic@lists.infradead.org linux-amlogic@archiver.kernel.org
	public-inbox-index linux-amlogic

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-amlogic


AGPL code for this site: git clone https://public-inbox.org/ public-inbox