diff mbox series

[v14,15/17] PCI: imx6: Disable clocks in reverse order of enable

Message ID 1656645935-1370-16-git-send-email-hongxing.zhu@nxp.com (mailing list archive)
State Superseded
Headers show
Series PCI: imx6: refine codes and add the error propagation | expand

Commit Message

Hongxing Zhu July 1, 2022, 3:25 a.m. UTC
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>
---
 drivers/pci/controller/dwc/pci-imx6.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Lucas Stach July 13, 2022, 8:59 a.m. UTC | #1
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)
diff mbox series

Patch

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)