From: Francesco Dolcini <francesco.dolcini@toradex.com>
To: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Mark Brown <broonie@kernel.org>,
Francesco Dolcini <francesco.dolcini@toradex.com>,
"l.stach@pengutronix.de" <l.stach@pengutronix.de>,
"bhelgaas@google.com" <bhelgaas@google.com>,
"lorenzo.pieralisi@arm.com" <lorenzo.pieralisi@arm.com>,
"jingoohan1@gmail.com" <jingoohan1@gmail.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
dl-linux-imx <linux-imx@nxp.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kernel@pengutronix.de" <kernel@pengutronix.de>
Subject: Re: [PATCH v3 3/7] PCI: imx6: Fix the regulator dump when link never came up
Date: Tue, 26 Oct 2021 10:52:21 +0200 [thread overview]
Message-ID: <20211026085221.GA87230@francesco-nb.int.toradex.com> (raw)
In-Reply-To: <AS8PR04MB8676A0F3DA3248C6A27801148C849@AS8PR04MB8676.eurprd04.prod.outlook.com>
On Tue, Oct 26, 2021 at 02:18:18AM +0000, Richard Zhu wrote:
> The _enabled check is used because that this regulator is optional in the HW design.
> To make the codes clean and aligned on different HW boards, the _enabled check is added.
>
> The root cause is that the error return is not handled properly by the controller driver.
> I.MX PCIe controller doesn't support the Hot-Plug, and it would return -110 error
> when PCIe link never came up. Thus, the _probe would be failed in the end.
> The clocks/regulator usage balance should be considered by i.MX PCIe controller, that's all.
> It's not a general case, and the problem is not caused by the regulator support.
Hello Richard,
I have one curiosity on this topic. Does this works well in case the regulator
is shared? I just want to be sure that if the regulator is shared everything is working fine
even if the PCI-E link is not used or not coming up for any reason.
Francesco
next prev parent reply other threads:[~2021-10-26 8:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-22 7:12 [PATCH v3 0/7] PCI: imx6: refine codes and add compliance tests mode support Richard Zhu
2021-10-22 7:12 ` [PATCH v3 1/7] PCI: imx6: Encapsulate the clock enable into one standalone function Richard Zhu
2021-10-22 7:12 ` [PATCH v3 2/7] PCI: imx6: Add the error propagation from host_init Richard Zhu
2021-10-22 7:12 ` [PATCH v3 3/7] PCI: imx6: Fix the regulator dump when link never came up Richard Zhu
2021-10-25 11:13 ` Francesco Dolcini
2021-10-25 11:23 ` Mark Brown
2021-10-26 2:18 ` Richard Zhu
2021-10-26 8:52 ` Francesco Dolcini [this message]
2021-10-26 9:06 ` Richard Zhu
2021-10-26 9:11 ` Francesco Dolcini
2021-10-26 9:18 ` Richard Zhu
2021-10-26 9:48 ` Francesco Dolcini
2021-10-28 6:48 ` Richard Zhu
2021-10-26 10:58 ` Mark Brown
2021-10-28 6:50 ` Richard Zhu
2021-10-28 11:50 ` Mark Brown
2021-10-29 3:58 ` Richard Zhu
2021-10-29 11:46 ` Mark Brown
2021-11-01 1:46 ` Richard Zhu
2021-10-26 1:57 ` Richard Zhu
2021-10-22 7:12 ` [PATCH v3 4/7] PCI: imx6: move the clock disable function to a proper place Richard Zhu
2021-10-22 7:12 ` [PATCH v3 5/7] PCI: dwc: add a new callback host exit function into host ops Richard Zhu
2021-10-22 7:12 ` [PATCH v3 6/7] PCI: imx6: Fix the reference handling unbalance when link never came up Richard Zhu
2021-10-22 7:12 ` [PATCH v3 7/7] PCI: imx6: Add the compliance tests mode support Richard Zhu
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