From: 21cnbao@gmail.com (Barry Song)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 2/4] pwm: sirf: add dt-binding document
Date: Thu, 24 Jul 2014 18:08:16 +0800 [thread overview]
Message-ID: <CAGsJ_4y4fw4rfkhntMYG19USsaxBhsyCj41wDDeXDURvR3XEEg@mail.gmail.com> (raw)
In-Reply-To: <1405476113-10127-1-git-send-email-huayi.li@csr.com>
2014-07-16 10:01 GMT+08:00 Huayi Li <huayi.li@csr.com>:
> This patch adds dt-binding document for pwm-sirf. here the controller clock
> can't generate PWM signals, so we need seperate clock as signal source.
>
> Signed-off-by: Huayi Li <huayi.li@csr.com>
Reviewed-by: Barry Song <Baohua.Song@csr.com>
except that the commit log has not explained enough clearly that every
pwm channel can choice one from five clock sources to generate PWM
wave.
> ---
> Documentation/devicetree/bindings/pwm/pwm-sirf.txt | 29 ++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sirf.txt
>
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-sirf.txt b/Documentation/devicetree/bindings/pwm/pwm-sirf.txt
> new file mode 100644
> index 0000000..221e5d9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/pwm-sirf.txt
> @@ -0,0 +1,29 @@
> +SiRF prima2 & atlas6 PWM drivers
> +
> +Required properties:
> +- compatible: "sirf,prima2-pwm"
> +- reg: physical base address and length of the controller's registers
> +- #pwm-cells: should be 2. See pwm.txt in this directory for a description of
> + the cells format.
> +- clocks: Must contain an entry for each entry in clock-names.
> + See ../clock/prima2-clock.txt for details.
> +- clock-names: Must include the following entries:
> + of clock sources to generate PWM signal,
> + - pwmc: PWM controller clock
> + - sigsrc0: source clock 0 for PWM
> + - sigsrc1: source clock 1 for PWM
> + - sigsrc2: source clock 2 for PWM
> + - sigsrc3: source clock 3 for PWM
> + - sigsrc4: source clock 4 for PWM
> +
> +Example:
> +
> +pwm: pwm at b0130000 {
> + compatible = "sirf,prima2-pwm";
> + #pwm-cells = <2>;
> + reg = <0xb0130000 0x10000>;
> + clocks = <&clks 21>, <&clks 1>, <&clks 2>,
> + <&clks 3>, <&clks 0>, <&clks 4>;
> + clock-names = "pwmc", "sigsrc0", "sigsrc1",
> + "sigsrc2", "sigsrc3", "sigsrc4";
> +};
> --
> 1.9.3
>
-barry
prev parent reply other threads:[~2014-07-24 10:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-16 2:01 [PATCH v5 2/4] pwm: sirf: add dt-binding document Huayi Li
2014-07-24 10:08 ` Barry Song [this message]
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=CAGsJ_4y4fw4rfkhntMYG19USsaxBhsyCj41wDDeXDURvR3XEEg@mail.gmail.com \
--to=21cnbao@gmail.com \
--cc=linux-arm-kernel@lists.infradead.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).