ARM: integrator: Convert PCI to use generic config accessors

Convert the integrator PCI driver to use the generic config access
functions.

This changes accesses from __raw_readX/__raw_writeX to readX/writeX
variants.  The spinlock is removed because it is unnecessary.  The config
read and write functions are already protected with a spinlock and no
access can occur during the .pre_init function.

[arnd: remove unused "flags"]
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: linux-arm-kernel@lists.infradead.org

1 files changed, 5 insertions, 57 deletions

diff --git a/arch/arm/mach-integrator/pci_v3.c b/arch/arm/mach-integrator/pci_v3.c
index c186a17c2cff..2565f0e7b5cf 100644
--- a/arch/arm/mach-integrator/pci_v3.c
+++ b/arch/arm/mach-integrator/pci_v3.c
@@ -356,7 +356,6 @@ static u64 pre_mem_pci_sz;
  *       7:2    register number
  *
  */
-static DEFINE_RAW_SPINLOCK(v3_lock);
 
 #undef V3_LB_BASE_PREFETCH
 #define V3_LB_BASE_PREFETCH 0
@@ -457,67 +456,21 @@ static void v3_close_config_window(void)
 static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where,
                           int size, u32 *val)
 {
-        void __iomem *addr;
-        unsigned long flags;
-        u32 v;
-
-        raw_spin_lock_irqsave(&v3_lock, flags);
-        addr = v3_open_config_window(bus, devfn, where);
-
-        switch (size) {
-        case 1:
-                v = __raw_readb(addr);
-                break;
-
-        case 2:
-                v = __raw_readw(addr);
-                break;
-
-        default:
-                v = __raw_readl(addr);
-                break;
-        }
-
+        int ret = pci_generic_config_read(bus, devfn, where, size, val);
         v3_close_config_window();
-        raw_spin_unlock_irqrestore(&v3_lock, flags);
-
-        *val = v;
-        return PCIBIOS_SUCCESSFUL;
+        return ret;
 }
 
 static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where,
                            int size, u32 val)
 {
-        void __iomem *addr;
-        unsigned long flags;
-
-        raw_spin_lock_irqsave(&v3_lock, flags);
-        addr = v3_open_config_window(bus, devfn, where);
-
-        switch (size) {
-        case 1:
-                __raw_writeb((u8)val, addr);
-                __raw_readb(addr);
-                break;
-
-        case 2:
-                __raw_writew((u16)val, addr);
-                __raw_readw(addr);
-                break;
-
-        case 4:
-                __raw_writel(val, addr);
-                __raw_readl(addr);
-                break;
-        }
-
+        int ret = pci_generic_config_write(bus, devfn, where, size, val);
         v3_close_config_window();
-        raw_spin_unlock_irqrestore(&v3_lock, flags);
-
-        return PCIBIOS_SUCCESSFUL;
+        return ret;
 }
 
 static struct pci_ops pci_v3_ops = {
+        .map_bus = v3_open_config_window,
         .read   = v3_read_config,
         .write  = v3_write_config,
 };
@@ -658,7 +611,6 @@ static int __init pci_v3_setup(int nr, struct pci_sys_data *sys)
  */
 static void __init pci_v3_preinit(void)
 {
-        unsigned long flags;
         unsigned int temp;
         phys_addr_t io_address = pci_pio_to_address(io_mem.start);
 
@@ -672,8 +624,6 @@ static void __init pci_v3_preinit(void)
         hook_fault_code(8, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
         hook_fault_code(10, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
 
-        raw_spin_lock_irqsave(&v3_lock, flags);
-
         /*
          * Unlock V3 registers, but only if they were previously locked.
          */
@@ -736,8 +686,6 @@ static void __init pci_v3_preinit(void)
         v3_writew(V3_LB_CFG, v3_readw(V3_LB_CFG) | (1 << 10));
         v3_writeb(V3_LB_IMASK, 0x28);
         __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
-
-        raw_spin_unlock_irqrestore(&v3_lock, flags);
 }
 
 static void __init pci_v3_postinit(void)