[PATCH v2 4/4] phy: qcom: phy-qcom-snps-eusb2: Add extra register write for Milos

[Luca Weiss]

As per the downstream devicetree for Milos, add a register write for
QCOM_USB_PHY_CFG_CTRL_1 as per the "eUSB2 HPG version 1.0.2 update".

Reviewed-by: Neil Armstrong <neil.armstrong at linaro.org>
Signed-off-by: Luca Weiss <luca.weiss at fairphone.com>
---
The downstream driver supports an arbitrary extra init sequence via
qcom,param-override-seq.

volcano-usb.dtsi has the following which is implemented in this patch:

    /* eUSB2 HPG version 1.0.2 update */
    qcom,param-override-seq =
            <0x00 0x58>;
---
 drivers/phy/phy-snps-eusb2.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/phy/phy-snps-eusb2.c b/drivers/phy/phy-snps-eusb2.c
index e232b8b4d29100b8fee9e913e2124788af09f2aa..87fc086424ba4d9fb3ce870aa7f7971a51d4a567 100644
--- a/drivers/phy/phy-snps-eusb2.c
+++ b/drivers/phy/phy-snps-eusb2.c
@@ -420,6 +420,12 @@ static int qcom_snps_eusb2_hsphy_init(struct phy *p)
 	/* set default parameters */
 	qcom_eusb2_default_parameters(phy);
 
+	if (of_device_is_compatible(p->dev.of_node, "qcom,milos-snps-eusb2-phy")) {
+		/* eUSB2 HPG version 1.0.2 update */
+		writel_relaxed(0x0, phy->base + QCOM_USB_PHY_CFG_CTRL_1);
+		readl_relaxed(phy->base + QCOM_USB_PHY_CFG_CTRL_1);
+	}
+
 	snps_eusb2_hsphy_write_mask(phy->base, QCOM_USB_PHY_HS_PHY_CTRL2,
 				    USB2_SUSPEND_N_SEL | USB2_SUSPEND_N,
 				    USB2_SUSPEND_N_SEL | USB2_SUSPEND_N);

-- 
2.50.0