Not all the ARM64 targets that are using ACPI have PCI, so introduce
some stub functions to make ACPI core run without CONFIG_PCI on ARM64.
Since ACPI on X86 and IA64 depends on PCI, it will not break X86 and
IA64 with this patch.
Signed-off-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
Signed-off-by: Al Stone <al.stone@xxxxxxxxxx>
Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
---
drivers/acpi/Makefile | 2 +-
drivers/acpi/internal.h | 5 +++++
drivers/acpi/osl.c | 16 ++++++++++++++
drivers/acpi/reboot.c | 47 +++++++++++++++++++++++++++++-----------
drivers/pnp/pnpacpi/rsparser.c | 2 ++
5 files changed, 58 insertions(+), 14 deletions(-)
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 0331f91..d8cebe3 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -38,7 +38,7 @@ acpi-y += acpi_processor.o
acpi-y += processor_core.o
acpi-y += ec.o
acpi-$(CONFIG_ACPI_DOCK) += dock.o
-acpi-y += pci_root.o pci_link.o pci_irq.o
+acpi-$(CONFIG_PCI) += pci_root.o pci_link.o pci_irq.o
acpi-$(CONFIG_X86_INTEL_LPSS) += acpi_lpss.o
acpi-y += acpi_platform.o
acpi-y += power.o
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index b125fdb..b1ef8fa 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -26,8 +26,13 @@
acpi_status acpi_os_initialize1(void);
int init_acpi_device_notify(void);
int acpi_scan_init(void);
+#ifdef CONFIG_PCI
void acpi_pci_root_init(void);
void acpi_pci_link_init(void);
+#else
+static inline void acpi_pci_root_init(void) {}
+static inline void acpi_pci_link_init(void) {}
+#endif /* CONFIG_PCI */
void acpi_processor_init(void);
void acpi_platform_init(void);
int acpi_sysfs_init(void);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index c543626..6434045 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1016,6 +1016,7 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
return AE_OK;
}
+#ifdef CONFIG_PCI
acpi_status
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
u64 *value, u32 width)
@@ -1074,6 +1075,21 @@ acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
return (result ? AE_ERROR : AE_OK);
}
+#else
+acpi_status
+acpi_os_read_pci_configuration(struct acpi_pci_id *pci_id, u32 reg,
+ u64 *value, u32 width)
+{
+ return AE_ERROR;
+}
+
+acpi_status
+acpi_os_write_pci_configuration(struct acpi_pci_id *pci_id, u32 reg,
+ u64 value, u32 width)
+{
+ return AE_ERROR;
+}
+#endif /* CONFIG_PCI */
static void acpi_os_execute_deferred(struct work_struct *work)
{
diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
index a6c77e8b..89a181f 100644
--- a/drivers/acpi/reboot.c
+++ b/drivers/acpi/reboot.c
@@ -3,12 +3,43 @@
#include <linux/acpi.h>
#include <acpi/reboot.h>
+/*
+ * There are some rare cases in the ARM world with PCI is not one
+ * of the buses available to us, even though we use ACPI.
+ */
+#ifdef CONFIG_PCI
+static void acpi_reset_with_writing_pci_config(u64 address, u8 reset_value)
+{
+ struct pci_bus *bus0;
+ unsigned int devfn;
+
+ /* The reset register can only live on bus 0. */
+ bus0 = pci_find_bus(0, 0);
+ if (!bus0)
+ return;
+
+ /* Form PCI device/function pair. */
+ devfn = PCI_DEVFN((address >> 32) & 0xffff,
+ (address >> 16) & 0xffff);
+ pr_debug("Resetting with ACPI PCI RESET_REG.\n");
+ /* Write the value that resets us. */
+ pci_bus_write_config_byte(bus0, devfn,
+ (address & 0xffff), reset_value);
+
+ return;
+}
+#else
+static void acpi_reset_with_writing_pci_config(u64 address, u8 reset_value)
+{
+ pr_warn("Resetting with ACPI PCI RESET_REG failed, PCI is disabled\n");
+ return;
+}
+#endif
+
void acpi_reboot(void)
{
struct acpi_generic_address *rr;
- struct pci_bus *bus0;
u8 reset_value;
- unsigned int devfn;
if (acpi_disabled)
return;
@@ -32,17 +63,7 @@ void acpi_reboot(void)
* on a device on bus 0. */
switch (rr->space_id) {
case ACPI_ADR_SPACE_PCI_CONFIG:
- /* The reset register can only live on bus 0. */
- bus0 = pci_find_bus(0, 0);
- if (!bus0)
- return;
- /* Form PCI device/function pair. */
- devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
- (rr->address >> 16) & 0xffff);
- printk(KERN_DEBUG "Resetting with ACPI PCI RESET_REG.");
- /* Write the value that resets us. */
- pci_bus_write_config_byte(bus0, devfn,
- (rr->address & 0xffff), reset_value);
+ acpi_reset_with_writing_pci_config(rr->address, reset_value);
break;
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 167f3d0..5804e77 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -113,8 +113,10 @@ static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
static void pnpacpi_add_irqresource(struct pnp_dev *dev, struct resource *r)
{
+#ifdef CONFIG_PCI
if (!(r->flags & IORESOURCE_DISABLED))
pcibios_penalize_isa_irq(r->start, 1);
+#endif
pnp_add_resource(dev, r);
}
--
1.7.9.5
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