PCI: uniphier: Set mode register to host mode

Set the mode register to host(RC) mode so that the host controller
mode is set-up consistently across SoCs.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
[lorenzo.pieralisi@arm.com: updated log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>

drivers/pci/controller/dwc/pcie-uniphier.c

@@ -33,6 +33,10 @@
 #define PCL_PIPEMON			0x0044
 #define PCL_PCLK_ALIVE			BIT(15)
 
+#define PCL_MODE			0x8000
+#define PCL_MODE_REGEN			BIT(8)
+#define PCL_MODE_REGVAL			BIT(0)
+
 #define PCL_APP_READY_CTRL		0x8008
 #define PCL_APP_LTSSM_ENABLE		BIT(0)
 
@@ -85,6 +89,12 @@ static void uniphier_pcie_init_rc(struct uniphier_pcie_priv *priv)
 {
 	u32 val;
 
+	/* set RC MODE */
+	val = readl(priv->base + PCL_MODE);
+	val |= PCL_MODE_REGEN;
+	val &= ~PCL_MODE_REGVAL;
+	writel(val, priv->base + PCL_MODE);
+
 	/* use auxiliary power detection */
 	val = readl(priv->base + PCL_APP_PM0);
 	val |= PCL_SYS_AUX_PWR_DET;