From: Jaghathiswari Rankappagounder Natarajan <jaghu-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
To: openbmc-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org,
jdelvare-IBi9RG/b67k@public.gmane.org,
linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org,
linux-hwmon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
corbet-T1hC0tSOHrs@public.gmane.org,
linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Jaghathiswari Rankappagounder Natarajan
<jaghu-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: [PATCH linux v1 0/2] Support for ASPEED AST2400/AST2500 PWM and Fan Tach driver
Date: Mon, 9 Jan 2017 13:59:33 -0800 [thread overview]
Message-ID: <20170109215935.30067-1-jaghu@google.com> (raw)
Support for ASPEED AST2400/AST2500 PWM and Fan Tach driver
Support for ASPEED AST2400/AST2500 PWM and Fan Tach driver.
The AST2400/AST2500 PWM controller can support 8 PWM output ports.
The AST2400/AST2500 Fan Tach controller can support 16 tachometer inputs.
There can be three different PWM clock types (Type M, N and O); Those three
types just to have three independent PWM sources.
The driver provides sysfs entries through which the user can configure the
duty cycle for the particular PWM output port and read the fan rpm value for
the particular tachometer input.
Added devicetree binding documentation for AST2400/AST2500 PWM and Fan Tach
support.
Tested on Zaius board (which has AST2500 chip) and observed that when
duty cycle is lowered then the fan speed is lowered and lower fan rpm value(
corresponding to the duty cycle) is reported and when the duty cycle is
increased then the fan speed increases and higher fan rpm value(corresponding
to the duty cycle) is reported.
Tested on AST2500 EVB board and observed the PWM output pulses come
correctly based on the given settings using Logic Saleae Analyzer.
Jaghathiswari Rankappagounder Natarajan (2):
Documentation: dt-bindings: Document bindings for aspeed pwm and fan
tach controller device driver
drivers: hwmon: hwmon driver for ASPEED AST2400/2500 PWM and Fan tach
controller
.../devicetree/bindings/hwmon/aspeed-pwm-tacho.txt | 153 ++++
Documentation/hwmon/aspeed-pwm-tacho | 22 +
drivers/hwmon/Kconfig | 9 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/aspeed-pwm-tacho.c | 884 +++++++++++++++++++++
5 files changed, 1069 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
create mode 100644 Documentation/hwmon/aspeed-pwm-tacho
create mode 100644 drivers/hwmon/aspeed-pwm-tacho.c
--
2.11.0.390.gc69c2f50cf-goog
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next reply other threads:[~2017-01-09 21:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-09 21:59 Jaghathiswari Rankappagounder Natarajan [this message]
2017-01-09 21:59 ` [PATCH linux v1 1/2] Documentation: dt-bindings: Document bindings for ASPEED AST2400/AST2500 pwm and fan tach controller device driver Jaghathiswari Rankappagounder Natarajan
2017-01-13 16:21 ` Rob Herring
2017-01-27 9:32 ` Jaghathiswari Rankappagounder Natarajan
[not found] ` <CANsWYUXFzUewaM21cfk8k1CFP=oVyWHC06vZLqkV-ZrFmbwVtQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-01-27 9:35 ` Jaghathiswari Rankappagounder Natarajan
2017-01-09 21:59 ` [PATCH linux v1 2/2] drivers: hwmon: hwmon driver for ASPEED AST2400/2500 PWM and Fan tach controller Jaghathiswari Rankappagounder Natarajan
2017-01-15 19:11 ` Guenter Roeck
2017-01-23 0:06 ` kbuild test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170109215935.30067-1-jaghu@google.com \
--to=jaghu-hpiqsd4aklfqt0dzr+alfa@public.gmane.org \
--cc=corbet-T1hC0tSOHrs@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=jdelvare-IBi9RG/b67k@public.gmane.org \
--cc=joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org \
--cc=linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org \
--cc=linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-hwmon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=mark.rutland-5wv7dgnIgG8@public.gmane.org \
--cc=openbmc-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org \
--cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).