Patchwork [v7,2/4] PCI: imx6: Mark PHY functions as i.MX6 specific

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Submitter Andrey Smirnov
Date Feb. 2, 2019, 12:15 a.m.
Message ID <20190202001523.12517-3-andrew.smirnov@gmail.com>
Download mbox | patch
Permalink /patch/716351/
State New
Headers show

Comments

Andrey Smirnov - Feb. 2, 2019, 12:15 a.m.
PCIe PHY IP block on i.MX7D differs from the one used on i.MX6 family,
so none of the code in current implementation of imx6_setup_phy_mpll()
or imx6_pcie_reset_phy() is applicable. Introduce
IMX6_PCIE_FLAG_IMX6_PHY and checks for it to aforementioned functions
to make sure they are only executed on apporpriate PCIe IP variants.

Tested-by: Trent Piepho <tpiepho@impinj.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: "A.s. Dong" <aisheng.dong@nxp.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: linux-imx@nxp.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
---
 drivers/pci/controller/dwc/pci-imx6.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 1e940ba7e4c4..26e1e974b0dd 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -41,8 +41,11 @@  enum imx6_pcie_variants {
 	IMX7D,
 };
 
+#define IMX6_PCIE_FLAG_IMX6_PHY			BIT(0)
+
 struct imx6_pcie_drvdata {
 	enum imx6_pcie_variants variant;
+	u32 flags;
 };
 
 struct imx6_pcie {
@@ -255,6 +258,9 @@  static void imx6_pcie_reset_phy(struct imx6_pcie *imx6_pcie)
 {
 	u32 tmp;
 
+	if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_PHY))
+		return;
+
 	pcie_phy_read(imx6_pcie, PHY_RX_OVRD_IN_LO, &tmp);
 	tmp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN |
 		PHY_RX_OVRD_IN_LO_RX_PLL_EN);
@@ -572,6 +578,9 @@  static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie)
 	int mult, div;
 	u32 val;
 
+	if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_PHY))
+		return 0;
+
 	switch (phy_rate) {
 	case 125000000:
 		/*
@@ -1090,12 +1099,15 @@  static void imx6_pcie_shutdown(struct platform_device *pdev)
 static const struct imx6_pcie_drvdata drvdata[] = {
 	[IMX6Q] = {
 		.variant = IMX6Q,
+		.flags = IMX6_PCIE_FLAG_IMX6_PHY,
 	},
 	[IMX6SX] = {
 		.variant = IMX6SX,
+		.flags = IMX6_PCIE_FLAG_IMX6_PHY,
 	},
 	[IMX6QP] = {
 		.variant = IMX6QP,
+		.flags = IMX6_PCIE_FLAG_IMX6_PHY,
 	},
 	[IMX7D] = {
 		.variant = IMX7D,