MIPS: ath79: add PCI registration code for AR934X

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
Cc: linux-mips@linux-mips.org
Cc: mcgrof@infradead.org
Patchwork: https://patchwork.linux-mips.org/patch/3516/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 14 insertions, 1 deletions

diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index 123cc3773b49..ea28e89d0a3c 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -72,6 +72,8 @@ config SOC_AR933X
 
 config SOC_AR934X
         select USB_ARCH_HAS_EHCI
+        select HW_HAS_PCI
+        select PCI_AR724X if PCI
         def_bool n
 
 config PCI_AR724X
diff --git a/arch/mips/ath79/pci.c b/arch/mips/ath79/pci.c
index bc40070e45c9..ca83abd9d31e 100644
--- a/arch/mips/ath79/pci.c
+++ b/arch/mips/ath79/pci.c
@@ -14,6 +14,7 @@
 
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/irq.h>
 #include <asm/mach-ath79/pci.h>
@@ -57,7 +58,9 @@ int __init pcibios_map_irq(const struct pci_dev *dev, uint8_t slot, uint8_t pin)
                 if (soc_is_ar71xx()) {
                         ath79_pci_irq_map = ar71xx_pci_irq_map;
                         ath79_pci_nr_irqs = ARRAY_SIZE(ar71xx_pci_irq_map);
-                } else if (soc_is_ar724x()) {
+                } else if (soc_is_ar724x() ||
+                           soc_is_ar9342() ||
+                           soc_is_ar9344()) {
                         ath79_pci_irq_map = ar724x_pci_irq_map;
                         ath79_pci_nr_irqs = ARRAY_SIZE(ar724x_pci_irq_map);
                 } else {
@@ -115,5 +118,13 @@ int __init ath79_register_pci(void)
         if (soc_is_ar724x())
                 return ar724x_pcibios_init(ATH79_CPU_IRQ_IP2);
 
+        if (soc_is_ar9342() || soc_is_ar9344()) {
+                u32 bootstrap;
+
+                bootstrap = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
+                if (bootstrap & AR934X_BOOTSTRAP_PCIE_RC)
+                        return ar724x_pcibios_init(ATH79_IP2_IRQ(0));
+        }
+
         return -ENODEV;
 }