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

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>

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 09cf496b9a2ad180817d929855bbc74341470412..848c8eef949ab5433baf82be1ce8c1e6595b0b36 100644 (file)
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -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;