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Message-ID: <AS8PR04MB867642A785CD47559879AE6B8CAC9@AS8PR04MB8676.eurprd04.prod.outlook.com>
Date: Thu, 16 Jun 2022 02:23:59 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: Bjorn Helgaas <helgaas@...nel.org>,
Lucas Stach <l.stach@...gutronix.de>,
Rob Herring <robh+dt@...nel.org>,
Mark Brown <broonie@...nel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Fabio Estevam <festevam@...il.com>,
Francesco Dolcini <francesco.dolcini@...adex.com>
CC: "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
dl-linux-imx <linux-imx@....com>,
Bjorn Helgaas <bhelgaas@...gle.com>
Subject: RE: [PATCH v12 13/13] PCI: imx6: Disable clocks in reverse order of
enable
> -----Original Message-----
> From: Bjorn Helgaas <helgaas@...nel.org>
> Sent: 2022年6月16日 7:16
> To: Hongxing Zhu <hongxing.zhu@....com>; Lucas Stach
> <l.stach@...gutronix.de>; Rob Herring <robh+dt@...nel.org>; Mark Brown
> <broonie@...nel.org>; Lorenzo Pieralisi <lorenzo.pieralisi@....com>; Fabio
> Estevam <festevam@...il.com>; Francesco Dolcini
> <francesco.dolcini@...adex.com>
> Cc: linux-pci@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; kernel@...gutronix.de; dl-linux-imx
> <linux-imx@....com>; Bjorn Helgaas <bhelgaas@...gle.com>
> Subject: [PATCH v12 13/13] PCI: imx6: Disable clocks in reverse order of enable
>
> From: Bjorn Helgaas <bhelgaas@...gle.com>
>
> imx6_pcie_clk_enable() enables clocks in the order:
>
> pcie_phy
> pcie_bus
> pcie
> imx6_pcie_enable_ref_clk
>
> Change imx6_pcie_clk_disable() to disable them in the reverse order.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Acked-by: Richard Zhu <hongxing.zhu@....com>
Best Regards
Richard Zhu
> ---
> drivers/pci/controller/dwc/pci-imx6.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> b/drivers/pci/controller/dwc/pci-imx6.c
> index bd736aff94a3..738b5a732cef 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -655,10 +655,10 @@ static int imx6_pcie_clk_enable(struct imx6_pcie
> *imx6_pcie)
>
> static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) {
> - clk_disable_unprepare(imx6_pcie->pcie);
> - clk_disable_unprepare(imx6_pcie->pcie_phy);
> - clk_disable_unprepare(imx6_pcie->pcie_bus);
> imx6_pcie_disable_ref_clk(imx6_pcie);
> + clk_disable_unprepare(imx6_pcie->pcie);
> + clk_disable_unprepare(imx6_pcie->pcie_bus);
> + clk_disable_unprepare(imx6_pcie->pcie_phy);
> }
>
> static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
> --
> 2.25.1
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