pci: imx: Fix potential 64bit memory access clamping

The driver limits the config space base to 32bit, however it can be
64bit on 64bit iMX hardware too. Remove that limitation. This patch
has no impact on the iMX6, which is the only SoC currently supported
by this driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/pci/pcie_imx.c

@@ -307,9 +307,11 @@ static int imx_pcie_regions_setup(void)
 	/* Region #0 is used for Outbound CFG space access. */
 	writel(0, priv->dbi_base + PCIE_ATU_VIEWPORT);
 
-	writel((u32)priv->cfg_base, priv->dbi_base + PCIE_ATU_LOWER_BASE);
-	writel(0, priv->dbi_base + PCIE_ATU_UPPER_BASE);
-	writel((u32)priv->cfg_base + MX6_ROOT_SIZE,
+	writel(lower_32_bits((uintptr_t)priv->cfg_base),
+	       priv->dbi_base + PCIE_ATU_LOWER_BASE);
+	writel(upper_32_bits((uintptr_t)priv->cfg_base),
+	       priv->dbi_base + PCIE_ATU_UPPER_BASE);
+	writel(lower_32_bits((uintptr_t)priv->cfg_base + MX6_ROOT_SIZE),
 	       priv->dbi_base + PCIE_ATU_LIMIT);
 
 	writel(0, priv->dbi_base + PCIE_ATU_LOWER_TARGET);
@@ -323,9 +325,9 @@ static int imx_pcie_regions_setup(void)
 /*
  * PCI Express accessors
  */
-static uint32_t get_bus_address(pci_dev_t d, int where)
+static void __iomem *get_bus_address(pci_dev_t d, int where)
 {
-	uint32_t va_address;
+	void __iomem *va_address;
 
 	/* Reconfigure Region #0 */
 	writel(0, priv->dbi_base + PCIE_ATU_VIEWPORT);
@@ -336,10 +338,10 @@ static uint32_t get_bus_address(pci_dev_t d, int where)
 		writel(PCIE_ATU_TYPE_CFG1, priv->dbi_base + PCIE_ATU_CR1);
 
 	if (PCI_BUS(d) == 0) {
-		va_address = (u32)priv->dbi_base;
+		va_address = priv->dbi_base;
 	} else {
 		writel(d << 8, priv->dbi_base + PCIE_ATU_LOWER_TARGET);
-		va_address = (u32)priv->cfg_base;
+		va_address = priv->cfg_base;
 	}
 
 	va_address += (where & ~0x3);
@@ -390,7 +392,7 @@ static void imx_pcie_fix_dabt_handler(bool set)
 static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d,
 				int where, u32 *val)
 {
-	uint32_t va_address;
+	void __iomem *va_address;
 	int ret;
 
 	ret = imx_pcie_addr_valid(d);
@@ -419,7 +421,7 @@ static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d,
 static int imx_pcie_write_config(struct pci_controller *hose, pci_dev_t d,
 			int where, u32 val)
 {
-	uint32_t va_address = 0;
+	void __iomem *va_address = NULL;
 	int ret;
 
 	ret = imx_pcie_addr_valid(d);