phy: rockchip-inno-usb2: add support of u2phy for rk3328

The u2phy driver of kernel 4.4 need add config and specific tuning
for rk3328. This patch add support of u2phy for rk3328.

Change-Id: Ie1bdfc0fde37d7d0b26d0f3aac136481bd6f4c44
Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>

diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c
index bc376687fba3b91df7e1c4266a6604be3d6e05ee..f258c90070842bc724fc1b25a22aae089e5f9619 100644 (file)
--- a/drivers/phy/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/phy-rockchip-inno-usb2.c
@@ -1364,6 +1364,26 @@ disable_clks:
        return ret;
 }
 
+static int rk3328_usb2phy_tuning(struct rockchip_usb2phy *rphy)
+{
+       int ret;
+
+       /* Open debug mode for tuning */
+       ret = regmap_write(rphy->grf, 0x2c, 0xffff0400);
+       if (ret)
+               return ret;
+
+       /*
+        * Open HS pre-emphasize function to increase
+        * HS slew rate for host port
+        */
+       ret = regmap_write(rphy->grf, 0x30, 0xffff851d);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
 static int rk3366_usb2phy_tuning(struct rockchip_usb2phy *rphy)
 {
        unsigned int open_pre_emphasize = 0xffff851f;
@@ -1475,6 +1495,26 @@ static const struct dev_pm_ops rockchip_usb2phy_dev_pm_ops = {
 #define ROCKCHIP_USB2PHY_DEV_PM        NULL
 #endif /* CONFIG_PM_SLEEP */
 
+static const struct rockchip_usb2phy_cfg rk3328_phy_cfgs[] = {
+       {
+               .reg = 0x100,
+               .num_ports      = 2,
+               .phy_tuning     = rk3328_usb2phy_tuning,
+               .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
+               .port_cfgs      = {
+                       [USB2PHY_PORT_HOST] = {
+                               .phy_sus        = { 0x104, 15, 0, 0, 0x1d1 },
+                               .ls_det_en      = { 0x110, 1, 1, 0, 1 },
+                               .ls_det_st      = { 0x114, 1, 1, 0, 1 },
+                               .ls_det_clr     = { 0x118, 1, 1, 0, 1 },
+                               .utmi_ls        = { 0x120, 17, 16, 0, 1 },
+                               .utmi_hstdet    = { 0x120, 19, 19, 0, 1 }
+                       }
+               },
+       },
+       { /* sentinel */ }
+};
+
 static const struct rockchip_usb2phy_cfg rk3366_phy_cfgs[] = {
        {
                .reg = 0x700,
@@ -1584,6 +1624,7 @@ static const struct rockchip_usb2phy_cfg rk3399_phy_cfgs[] = {
 };
 
 static const struct of_device_id rockchip_usb2phy_dt_match[] = {
+       { .compatible = "rockchip,rk3328-usb2phy", .data = &rk3328_phy_cfgs },
        { .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
        { .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
        {}