From: Maxime Ripard <mripard@kernel.org>
To: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: thierry.reding@gmail.com, wens@csie.org, robh+dt@kernel.org,
mark.rutland@arm.com, linux-pwm@vger.kernel.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com
Subject: Re: [PATCH 5/6] pwm: sun4i: Add support to output source clock directly
Date: Sat, 27 Jul 2019 12:50:08 +0200 [thread overview]
Message-ID: <20190727105008.he35sixfvoyl2lm7@flea.home> (raw)
In-Reply-To: <20190726184045.14669-6-jernej.skrabec@siol.net>
On Fri, Jul 26, 2019 at 08:40:44PM +0200, Jernej Skrabec wrote:
> PWM core has an option to bypass whole logic and output unchanged source
> clock as PWM output. This is achieved by enabling bypass bit.
>
> Note that when bypass is enabled, no other setting has any meaning, not
> even enable bit.
>
> This mode of operation is needed to achieve high enough frequency to
> serve as clock source for AC200 chip, which is integrated into same
> package as H6 SoC.
>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
It doesn't seem to be available on the A10 (at least) though. The A13
seem to have it, so you should probably check that, and make that
conditional to the compatible if not available on all of them.
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2019-07-27 10:50 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-26 18:40 [PATCH 0/6] pwm: sun4i: Add support for Allwinner H6 Jernej Skrabec
2019-07-26 18:40 ` [PATCH 1/6] dt-bindings: pwm: allwinner: Add H6 PWM description Jernej Skrabec
2019-07-27 10:42 ` Maxime Ripard
[not found] ` <20190726184045.14669-1-jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
2019-07-26 18:40 ` [PATCH 2/6] pwm: sun4i: Add a quirk for reset line Jernej Skrabec
2019-07-27 10:42 ` Maxime Ripard
[not found] ` <20190726184045.14669-3-jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
2019-07-29 6:36 ` Uwe Kleine-König
[not found] ` <20190729063630.rn325whatfnc3m7n-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 6:43 ` Chen-Yu Tsai
[not found] ` <CAGb2v65KOpivHQNkg+R2=D=ejCJYnPdVcyHJZW-GJCR8j0Yk0g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-07-29 7:12 ` Uwe Kleine-König
2019-07-29 10:18 ` Philipp Zabel
2019-07-29 16:37 ` Maxime Ripard
[not found] ` <20190729163715.vtv7lkrywewomxga-YififvaboMKzQB+pC5nmwQ@public.gmane.org>
2019-07-29 18:20 ` Uwe Kleine-König
2019-07-26 18:40 ` [PATCH 3/6] pwm: sun4i: Add a quirk for bus clock Jernej Skrabec
2019-07-27 10:46 ` Maxime Ripard
[not found] ` <20190727104628.jsdvpxvcpzru75v5-YififvaboMKzQB+pC5nmwQ@public.gmane.org>
2019-07-27 14:15 ` Jernej Škrabec
2019-07-27 14:27 ` Chen-Yu Tsai
2019-07-29 6:38 ` Uwe Kleine-König
[not found] ` <20190729063825.wxfky6nswcru26g7-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 15:48 ` Jernej Škrabec
2019-07-29 16:14 ` Uwe Kleine-König
2019-07-29 16:45 ` Maxime Ripard
[not found] ` <20190729164516.yxfgj2zd3d5ii4c4-YififvaboMKzQB+pC5nmwQ@public.gmane.org>
2019-07-29 19:04 ` Uwe Kleine-König
2019-07-26 18:40 ` [PATCH 4/6] pwm: sun4i: Add support for H6 PWM Jernej Skrabec
[not found] ` <20190726184045.14669-5-jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
2019-07-29 6:40 ` Uwe Kleine-König
[not found] ` <20190729064030.7uenld2kbof45zti-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 15:55 ` Jernej Škrabec
2019-07-29 16:07 ` Uwe Kleine-König
2019-07-29 16:09 ` [linux-sunxi] " Chen-Yu Tsai
[not found] ` <CAGb2v66C=ghjck6rxTg6Vt4xN2DcXntzVOa=KJWh98KRjkhnHQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-07-29 16:24 ` Uwe Kleine-König
[not found] ` <20190729162428.bxuzgxg5sjqptlbp-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 16:40 ` Jernej Škrabec
2019-07-29 18:40 ` Uwe Kleine-König
[not found] ` <20190729184041.vlvfz3vz3ykhufdk-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 18:46 ` Jernej Škrabec
2019-07-29 18:51 ` Uwe Kleine-König
[not found] ` <20190729185108.tpilwoooxvi2z72e-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 22:04 ` Jernej Škrabec
2019-07-30 8:09 ` Uwe Kleine-König
[not found] ` <20190730080900.hhxrqun7vk4nsj2h-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-30 8:32 ` Chen-Yu Tsai
2019-07-30 17:06 ` [linux-sunxi] " Maxime Ripard
2019-07-31 6:52 ` Uwe Kleine-König
2019-08-12 9:56 ` [linux-sunxi] " Maxime Ripard
2019-08-12 10:47 ` Uwe Kleine-König
[not found] ` <20190812104700.vzpdxx3yddthiif5-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-08-12 10:51 ` Jernej Škrabec
2019-07-26 18:40 ` [PATCH 5/6] pwm: sun4i: Add support to output source clock directly Jernej Skrabec
2019-07-27 10:50 ` Maxime Ripard [this message]
[not found] ` <20190727105008.he35sixfvoyl2lm7-YififvaboMKzQB+pC5nmwQ@public.gmane.org>
2019-07-27 14:28 ` Jernej Škrabec
2019-07-27 14:54 ` Chen-Yu Tsai
[not found] ` <20190726184045.14669-6-jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
2019-07-29 7:06 ` Uwe Kleine-König
[not found] ` <20190729070605.vlu7kgzn362ph2q3-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2019-07-29 16:16 ` Jernej Škrabec
2019-07-29 16:29 ` Uwe Kleine-König
2019-07-26 18:40 ` [PATCH 6/6] arm64: dts: allwinner: h6: Add PWM node Jernej Skrabec
2019-07-27 10:51 ` Maxime Ripard
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