From: Lucas Stach <l.stach@pengutronix.de>
To: Marek Vasut <marex@denx.de>, Shawn Guo <shawnguo@kernel.org>,
Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org,
Frieder Schrempf <frieder.schrempf@kontron.de>,
patchwork-lst@pengutronix.de, NXP Linux Team <linux-imx@nxp.com>,
kernel@pengutronix.de, Fabio Estevam <festevam@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 04/11] soc: imx: gpcv2: wait for ADB400 handshake
Date: Wed, 30 Sep 2020 18:19:47 +0200 [thread overview]
Message-ID: <9533c2b81a9866aec45d2604befe7cdda79d0679.camel@pengutronix.de> (raw)
In-Reply-To: <818925c0-b45f-67b4-02a1-8db49ccc491e@denx.de>
On Mi, 2020-09-30 at 18:11 +0200, Marek Vasut wrote:
> On 9/30/20 5:49 PM, Lucas Stach wrote:
>
> [...]
>
> > @@ -176,9 +180,19 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
> > GPC_PGC_CTRL_PCR, 0);
> >
> > /* request the ADB400 to power up */
> > - if (domain->bits.hsk)
> > + if (domain->bits.hskreq) {
> > regmap_update_bits(domain->regmap, GPC_PU_PWRHSK,
> > - domain->bits.hsk, domain->bits.hsk);
> > + domain->bits.hskreq, domain->bits.hskreq);
> > +
> > + ret = regmap_read_poll_timeout(domain->regmap, GPC_PU_PWRHSK,
> > + reg_val,
> > + (reg_val & domain->bits.hskack),
> > + 0, USEC_PER_MSEC);
> > + if (ret) {
> > + dev_err(domain->dev, "failed to power up ADB400\n");
>
> The ADB400 is a bus bridge, so the bus is being attached here, not
> powered up, right ?
The bits in the PWRHSK register are called "power down" bits, so I kept
this nomenclature. Also I think the ADB400 is mostly isolating the bus
in the power domains from the rest of the NoC, "attaching" of the bus
is really disabling the isolation.
As there are multiple valid naming choices I kept the naming from the
RM.
Regards,
Lucas
next prev parent reply other threads:[~2020-09-30 16:19 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 15:49 [PATCH 00/11] i.MX8MM power domain support Lucas Stach
2020-09-30 15:49 ` [PATCH 01/11] soc: imx: gpcv2: move to more ideomatic error handling in probe Lucas Stach
2020-09-30 16:04 ` Marek Vasut
2020-09-30 15:49 ` [PATCH 02/11] soc: imx: gpcv2: move domain mapping to domain driver probe Lucas Stach
2020-09-30 16:07 ` Marek Vasut
2020-09-30 15:49 ` [PATCH 03/11] soc: imx: gpcv2: split power up and power down sequence control Lucas Stach
2020-09-30 16:10 ` Marek Vasut
2020-09-30 15:49 ` [PATCH 04/11] soc: imx: gpcv2: wait for ADB400 handshake Lucas Stach
2020-09-30 16:11 ` Marek Vasut
2020-09-30 16:19 ` Lucas Stach [this message]
2020-09-30 16:23 ` Marek Vasut
2020-10-09 3:05 ` Jacky Bai
2020-10-09 7:27 ` Marek Vasut
2020-10-09 7:51 ` Jacky Bai
2020-10-09 8:19 ` Marek Vasut
2020-09-30 15:50 ` [PATCH 05/11] soc: imx: gpcv2: add runtime PM support for power-domains Lucas Stach
2020-09-30 16:14 ` Marek Vasut
2020-09-30 16:20 ` Lucas Stach
2020-09-30 15:50 ` [PATCH 06/11] soc: imx: gpcv2: allow domains without power-sequence control Lucas Stach
2020-10-09 7:54 ` Jacky Bai
2020-10-09 7:57 ` Jacky Bai
2020-09-30 15:50 ` [PATCH 07/11] soc: imx: gpcv2: add support for optional resets Lucas Stach
2020-09-30 16:15 ` Marek Vasut
2020-09-30 16:23 ` Lucas Stach
2020-09-30 16:30 ` Marek Vasut
2020-09-30 16:34 ` Lucas Stach
2020-09-30 16:38 ` Marek Vasut
2020-10-01 8:59 ` Krzysztof Kozlowski
2020-10-06 19:42 ` Rob Herring
2020-09-30 15:50 ` [PATCH 08/11] dt-bindings: add defines for i.MX8MM power domains Lucas Stach
2020-10-01 8:54 ` Krzysztof Kozlowski
2020-10-06 19:47 ` Rob Herring
2020-09-30 15:50 ` [PATCH 09/11] soc: imx: gpcv2: add support " Lucas Stach
2020-09-30 16:18 ` Marek Vasut
2020-09-30 15:50 ` [PATCH 10/11] arm64: dts: imx8mm: add GPC node and " Lucas Stach
2020-09-30 16:20 ` Marek Vasut
2020-10-01 8:51 ` Krzysztof Kozlowski
2020-10-23 13:22 ` Adam Ford
2020-10-23 14:39 ` Jacky Bai
2020-10-26 10:56 ` Abel Vesa
2020-10-26 11:01 ` Abel Vesa
2020-10-26 11:13 ` Adam Ford
2020-10-26 11:02 ` Lucas Stach
2020-09-30 15:50 ` [PATCH 11/11] arm64: dts: imx8mm: put USB controllers into power-domains Lucas Stach
2020-10-01 7:46 ` [PATCH 00/11] i.MX8MM power domain support Frieder Schrempf
2020-10-03 18:03 ` Adam Ford
[not found] ` <CAHCN7xKjWEwQr9y0QLrR6KVT=ut=v=coqt4beAvrz1kQSGbX1g@mail.gmail.com>
2020-10-03 18:08 ` Marek Vasut
2020-10-03 18:11 ` Adam Ford
2020-10-08 20:47 ` Adam Ford
2020-10-09 3:00 ` Jacky Bai
2020-10-09 11:12 ` Lucas Stach
2020-10-09 12:57 ` Adam Ford
2020-10-10 2:16 ` Jacky Bai
2020-10-13 18:26 ` Lucas Stach
2020-10-14 1:23 ` Peng Fan
2020-10-22 8:24 ` Lucas Stach
2020-10-22 16:36 ` Fabio Estevam
2020-10-28 13:50 ` Peng Fan
2020-10-31 13:56 ` Adam Ford
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