PCI: add power-state name strings

This patch (as1235) adds an array of PCI power-state names, together
with a simple inline accessor routine.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1a91bf9687af969c69f26c8e67fca08747c0d426..07bbb9b3b93fe1a46ba4e15dcd4d309d31b54ba9 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -24,6 +24,11 @@
 #include <asm/setup.h>
 #include "pci.h"
 
+const char *pci_power_names[] = {
+       "error", "D0", "D1", "D2", "D3hot", "D3cold", "unknown",
+};
+EXPORT_SYMBOL_GPL(pci_power_names);
+
 unsigned int pci_pm_d3_delay = PCI_PM_D3_WAIT;
 
 #ifdef CONFIG_PCI_DOMAINS

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 72698d89e767c76909fb0b4cdb65f292c93e0b76..8e366bb0705fc5e4c386d5dea5b2a71f0bbeb58e 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -124,6 +124,14 @@ typedef int __bitwise pci_power_t;
 #define PCI_UNKNOWN    ((pci_power_t __force) 5)
 #define PCI_POWER_ERROR        ((pci_power_t __force) -1)
 
+/* Remember to update this when the list above changes! */
+extern const char *pci_power_names[];
+
+static inline const char *pci_power_name(pci_power_t state)
+{
+       return pci_power_names[1 + (int) state];
+}
+
 #define PCI_PM_D2_DELAY        200
 #define PCI_PM_D3_WAIT 10
 #define PCI_PM_BUS_WAIT        50