[PATCH 2/3] phy: renesas: rcar-gen3-usb2: Add support for R7S9210

[Chris Brandt]

The RZ/A2 has the same USB2 host controller as R-Car Gen3 with only some
minor differences.

Signed-off-by: Chris Brandt <chris.bra...@renesas.com>
---
 drivers/phy/renesas/Kconfig              |  2 +-
 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/renesas/Kconfig b/drivers/phy/renesas/Kconfig
index e340a925bbb1..beebeba31e84 100644
--- a/drivers/phy/renesas/Kconfig
+++ b/drivers/phy/renesas/Kconfig
@@ -19,7 +19,7 @@ config PHY_RCAR_GEN3_PCIE
 config PHY_RCAR_GEN3_USB2
        tristate "Renesas R-Car generation 3 USB 2.0 PHY driver"
        depends on ARCH_RENESAS
-       depends on EXTCON
+       depends on EXTCON || ARCH_R7S9210
        depends on USB_SUPPORT
        select GENERIC_PHY
        select USB_COMMON
diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c 
b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index d0f412c25981..96ac75ba40ea 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -34,6 +34,7 @@
 #define USB2_VBCTRL            0x60c
 #define USB2_LINECTRL1         0x610
 #define USB2_ADPCTRL           0x630
+#define USB2_PHYCLK_CTRL       0x644
 
 /* INT_ENABLE */
 #define USB2_INT_ENABLE_UCOM_INTEN     BIT(3)
@@ -88,6 +89,7 @@ struct rcar_gen3_chan {
        bool extcon_host;
        bool is_otg_channel;
        bool uses_otg_pins;
+       bool uses_usb_x1;
 };
 
 /*
@@ -326,6 +328,9 @@ static int rcar_gen3_phy_usb2_init(struct phy *p)
        struct rcar_gen3_chan *channel = phy_get_drvdata(p);
        void __iomem *usb2_base = channel->base;
 
+       if (channel->uses_usb_x1)
+               writel(0x00000001, usb2_base + USB2_PHYCLK_CTRL);
+
        /* Initialize USB2 part */
        writel(USB2_INT_ENABLE_INIT, usb2_base + USB2_INT_ENABLE);
        writel(USB2_SPD_RSM_TIMSET_INIT, usb2_base + USB2_SPD_RSM_TIMSET);
@@ -334,6 +339,9 @@ static int rcar_gen3_phy_usb2_init(struct phy *p)
        /* Initialize otg part */
        if (channel->is_otg_channel)
                rcar_gen3_init_otg(channel);
+       else
+               /* No otg, so default to host mode */
+               writel(0x00000000, usb2_base + USB2_COMMCTRL);
 
        return 0;
 }
@@ -406,6 +414,7 @@ static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void 
*_ch)
 }
 
 static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
+       { .compatible = "renesas,usb2-phy-r7s9210" },
        { .compatible = "renesas,usb2-phy-r8a7795" },
        { .compatible = "renesas,usb2-phy-r8a7796" },
        { .compatible = "renesas,usb2-phy-r8a77965" },
@@ -471,6 +480,9 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device 
*pdev)
                }
        }
 
+       if (of_property_read_bool(dev->of_node, "renesas,uses_usb_x1"))
+               channel->uses_usb_x1 = true;
+
        /*
         * devm_phy_create() will call pm_runtime_enable(&phy->dev);
         * And then, phy-core will manage runtime pm for this device.
-- 
2.16.1