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PCI: imx6: Factor out ref clock disable to match enable

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The PCIe ref clocks are specific to different variants.  The enables are
already split out into imx6_pcie_enable_ref_clk(), but the disables were
combined with the more generic bus/phy/pcie clock disables in
imx6_pcie_clk_disable().

Split out the variant-specific disables into imx6_pcie_disable_ref_clk() to
match imx6_pcie_enable_ref_clk().

No functional change intended.

Link: https://lore.kernel.org/r/1657783869-19194-6-git-send-email-hongxing.zhu@nxp.com
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Richard Zhu <hongxing.zhu@nxp.com>
This commit is contained in:
Bjorn Helgaas 2022-07-14 15:30:57 +08:00
parent 34b1b90225
commit d0a75c791f
1 changed files with 10 additions and 6 deletions
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16
drivers/pci/controller/dwc/pci-imx6.c
View file

@ -580,12 +580,8 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
return ret;
}
static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie)
static void imx6_pcie_disable_ref_clk(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);
switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
@ -595,8 +591,8 @@ static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie)
IMX7D_GPR12_PCIE_PHY_REFCLK_SEL,
IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
break;
case IMX8MQ:
case IMX8MM:
case IMX8MQ:
clk_disable_unprepare(imx6_pcie->pcie_aux);
break;
default:
@ -604,6 +600,14 @@ static void imx6_pcie_clk_disable(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);
}
static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
{
struct device *dev = imx6_pcie->pci->dev;