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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Mark Brown <broonie@kernel.org>
Cc: linux-rockchip@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	Heiko Stuebner <heiko@sntech.de>,
	Michael Riesch <michael.riesch@wolfvision.net>,
	kernel@pengutronix.de, Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 3/4] soc: rockchip: power-domain: Add regulator support
Date: Wed, 22 Dec 2021 11:40:36 +0100	[thread overview]
Message-ID: <20211222104036.GY6003@pengutronix.de> (raw)
In-Reply-To: <YcB85mzJHrirUEDA@sirena.org.uk>

On Mon, Dec 20, 2021 at 12:53:58PM +0000, Mark Brown wrote:
> On Mon, Dec 20, 2021 at 10:44:35AM +0100, Sascha Hauer wrote:
> 
> > Well, all true and on one specific board the regulator is indeed not
> > optional. However, on all other power domains that don't need a
> > regulator and all other boards and all other SoCs this driver is used we
> > now get:
> 
> This seems unlikely to be board specific, if the chip requires power the
> chip requires power.  If there are power domains that don't take
> external supplies then they shouldn't be requesting any regulators and
> should be fixed.
> 
> > [    0.185588] rk-power-domain rk-power-domain.8: supply power not found, using dummy regulator
> 
> It seems vanishingly unlikely that the SoC takes a single supply called
> "power" shared by everything in the SoC but that is what the code
> appears to be requesting - the power domains should be requesting the
> supplies they actually use, and as ever the supplies should be named
> such that someone looking at the schematic can hook them up.  The
> general recommendation is to use the names used in the datasheet.

Ok. I'll change the patch in a way that only for the GPU power domain on
rk3568 a supply is requested. That's the one power domain I know that a
regulator is needed. I'm sure there are more, if not on rk3568 then
probably on other SoCs the driver handles. Once we notice that other
domains need a supply we'll have to add the supply name to driver data
for that domain.

Sascha


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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WARNING: multiple messages have this Message-ID
From: Sascha Hauer <s.hauer@pengutronix.de>
To: Mark Brown <broonie@kernel.org>
Cc: linux-rockchip@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	Heiko Stuebner <heiko@sntech.de>,
	Michael Riesch <michael.riesch@wolfvision.net>,
	kernel@pengutronix.de, Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 3/4] soc: rockchip: power-domain: Add regulator support
Date: Wed, 22 Dec 2021 11:40:36 +0100	[thread overview]
Message-ID: <20211222104036.GY6003@pengutronix.de> (raw)
In-Reply-To: <YcB85mzJHrirUEDA@sirena.org.uk>

On Mon, Dec 20, 2021 at 12:53:58PM +0000, Mark Brown wrote:
> On Mon, Dec 20, 2021 at 10:44:35AM +0100, Sascha Hauer wrote:
> 
> > Well, all true and on one specific board the regulator is indeed not
> > optional. However, on all other power domains that don't need a
> > regulator and all other boards and all other SoCs this driver is used we
> > now get:
> 
> This seems unlikely to be board specific, if the chip requires power the
> chip requires power.  If there are power domains that don't take
> external supplies then they shouldn't be requesting any regulators and
> should be fixed.
> 
> > [    0.185588] rk-power-domain rk-power-domain.8: supply power not found, using dummy regulator
> 
> It seems vanishingly unlikely that the SoC takes a single supply called
> "power" shared by everything in the SoC but that is what the code
> appears to be requesting - the power domains should be requesting the
> supplies they actually use, and as ever the supplies should be named
> such that someone looking at the schematic can hook them up.  The
> general recommendation is to use the names used in the datasheet.

Ok. I'll change the patch in a way that only for the GPU power domain on
rk3568 a supply is requested. That's the one power domain I know that a
regulator is needed. I'm sure there are more, if not on rk3568 then
probably on other SoCs the driver handles. Once we notice that other
domains need a supply we'll have to add the supply name to driver data
for that domain.

Sascha


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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

  reply	other threads:[~2021-12-22 10:40 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-17 13:09 [PATCH 0/4] " Sascha Hauer
2021-12-17 13:09 ` Sascha Hauer
2021-12-17 13:09 ` [PATCH 1/4] soc: rockchip: power-domain: register device for each domain Sascha Hauer
2021-12-17 13:09   ` Sascha Hauer
2021-12-17 13:09 ` [PATCH 2/4] soc: rockchip: power-domain: Use devm_clk_bulk_get_all() Sascha Hauer
2021-12-17 13:09   ` Sascha Hauer
2021-12-17 13:09 ` [PATCH 3/4] soc: rockchip: power-domain: Add regulator support Sascha Hauer
2021-12-17 13:09   ` Sascha Hauer
2021-12-20  9:44   ` Sascha Hauer
2021-12-20  9:44     ` Sascha Hauer
2021-12-20 10:46     ` Robin Murphy
2021-12-20 10:46       ` Robin Murphy
2021-12-20 12:56       ` Mark Brown
2021-12-20 12:56         ` Mark Brown
2021-12-20 12:53     ` Mark Brown
2021-12-20 12:53       ` Mark Brown
2021-12-22 10:40       ` Sascha Hauer [this message]
2021-12-22 10:40         ` Sascha Hauer
2021-12-22 12:54         ` Robin Murphy
2021-12-22 12:54           ` Robin Murphy
2021-12-22 13:00           ` Mark Brown
2021-12-22 13:00             ` Mark Brown
2021-12-22 13:19             ` Robin Murphy
2021-12-22 13:19               ` Robin Murphy
2021-12-22 13:25               ` Mark Brown
2021-12-22 13:25                 ` Mark Brown
2021-12-22 13:29                 ` Michael Riesch
2021-12-22 13:29                   ` Michael Riesch
2021-12-22 13:37                   ` Michael Riesch
2021-12-22 13:40                   ` Mark Brown
2021-12-22 13:40                     ` Mark Brown
2022-02-23  8:51                     ` Michael Riesch
2022-02-23  8:51                       ` Michael Riesch
2021-12-17 13:09 ` [PATCH 4/4] dt-bindings: power: rockchip: Add power-supply to domain nodes Sascha Hauer
2021-12-17 13:09   ` Sascha Hauer

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