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Message-ID: <775a3b0f9ceb26297565c5513cf41a5938817e8b.camel@pengutronix.de>
Subject: Re: [PATCH v14 15/17] PCI: imx6: Disable clocks in reverse order of
 enable
From:   Lucas Stach <l.stach@pengutronix.de>
To:     Richard Zhu <hongxing.zhu@nxp.com>, bhelgaas@google.com,
        robh+dt@kernel.org, broonie@kernel.org, lorenzo.pieralisi@arm.com,
        festevam@gmail.com, francesco.dolcini@toradex.com
Cc:     linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, kernel@pengutronix.de,
        linux-imx@nxp.com
Date:   Wed, 13 Jul 2022 10:59:27 +0200
In-Reply-To: <1656645935-1370-16-git-send-email-hongxing.zhu@nxp.com>
References: <1656645935-1370-1-git-send-email-hongxing.zhu@nxp.com>
         <1656645935-1370-16-git-send-email-hongxing.zhu@nxp.com>
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Am Freitag, dem 01.07.2022 um 11:25 +0800 schrieb Richard Zhu:
> From: Bjorn Helgaas <bhelgaas@google.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@google.com>
> Acked-by: Richard Zhu <hongxing.zhu@nxp.com>

Reviewed-by: Lucas Stach <l.stach@pengutronix.de>

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 0b2a5256fb0d..79a05e190016 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)
>  {
> +	imx6_pcie_disable_ref_clk(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_phy);
>  }
>  
>  static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)