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From: "Jernej Škrabec" <jernej.skrabec@siol.net>
To: Maxime Ripard <mripard@kernel.org>
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 16:28:38 +0200	[thread overview]
Message-ID: <4063694.66Ui2fGJfo@jernej-laptop> (raw)
In-Reply-To: <20190727105008.he35sixfvoyl2lm7@flea.home>

Dne sobota, 27. julij 2019 ob 12:50:08 CEST je Maxime Ripard napisal(a):
> 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.

Ok, can you suggest the name for the quirk? "has_bypass" is suspiciously 
similar to "has_prescaler_bypass".

Also, how to name these sun4i_pwm_data structures? Now that there are (will 
be) three new quirks, name of the structure would be just too long, like 
"sun50i_pwm_dual_prescaler_bypass_clk_rst_bypass". 

Best regards,
Jernej

> 
> Maxime
> 
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com





  reply	other threads:[~2019-07-27 14:28 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
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
2019-07-29  6:36   ` Uwe Kleine-König
2019-07-29  6:43     ` Chen-Yu Tsai
2019-07-29  7:12       ` Uwe Kleine-König
2019-07-29 10:18         ` Philipp Zabel
2019-07-29 16:37         ` Maxime Ripard
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
2019-07-27 14:15     ` Jernej Škrabec
2019-07-27 14:27     ` Chen-Yu Tsai
2019-07-29  6:38   ` Uwe Kleine-König
2019-07-29 15:48     ` Jernej Škrabec
2019-07-29 16:14       ` Uwe Kleine-König
2019-07-29 16:45         ` Maxime Ripard
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
2019-07-29  6:40   ` Uwe Kleine-König
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
2019-07-29 16:24           ` Uwe Kleine-König
2019-07-29 16:40             ` Jernej Škrabec
2019-07-29 18:40               ` Uwe Kleine-König
2019-07-29 18:46                 ` Jernej Škrabec
2019-07-29 18:51                   ` Uwe Kleine-König
2019-07-29 22:04                     ` Jernej Škrabec
2019-07-30  8:09                       ` Uwe Kleine-König
2019-07-30  8:32                         ` Chen-Yu Tsai
2019-07-30 17:06                         ` Maxime Ripard
2019-07-31  6:52                           ` Uwe Kleine-König
2019-08-12  9:56                             ` Maxime Ripard
2019-08-12 10:47                               ` Uwe Kleine-König
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
2019-07-27 14:28     ` Jernej Škrabec [this message]
2019-07-27 14:54       ` [linux-sunxi] " Chen-Yu Tsai
2019-07-29  7:06   ` Uwe Kleine-König
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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