Now that we solely depend on the vendor pci id the station id will be
compared for a large number of pci device ids. Cache the station id to
avoid retreiving it from SMBIOSTable every time.
Signed-off-by: Tobias Schaffner <tobias.schaff...@siemens.com>
---
drivers/watchdog/w83627hf_wdt.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 68cb42a..c0c35d2 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -39,6 +39,7 @@
#include <efi.h>
#include <efilib.h>
#include <pci/header.h>
+#include <stdbool.h>
#include <sys/io.h>
#include <mmio.h>
#include "simatic.h"
@@ -69,6 +70,8 @@ static int cr_wdt_control; /* WDT control register */
static int cr_wdt_csr; /* WDT control & status register */
static int wdt_cfg_enter = 0x87;/* key to unlock configuration space */
static int wdt_cfg_leave = 0xAA;/* key to lock configuration space */
+static UINT32 station_id = 0;
+static BOOLEAN station_id_cached = false;
static void superio_outb(int reg, int val)
{
@@ -192,6 +195,15 @@ static int wdt_set_time(unsigned int timeout)
return 0;
}
+static UINT32 cached_simatic_station_id(VOID)
+{
+ if (station_id_cached) return station_id;
+
+ station_id = simatic_station_id();
+ station_id_cached = true;
+ return station_id;
+}
+
static EFI_STATUS init(EFI_PCI_IO *pci_io, UINT16 pci_vendor_id,
UINT16 __attribute__((unused)) pci_device_id,
UINTN timeout)
@@ -202,7 +214,7 @@ static EFI_STATUS init(EFI_PCI_IO *pci_io, UINT16
pci_vendor_id,
return EFI_UNSUPPORTED;
}
- switch (simatic_station_id()) {
+ switch (cached_simatic_station_id()) {
case SIMATIC_IPCBX_56A:
case SIMATIC_IPCBX_59A:
chip = wdt_find(0x2e);
--
2.34.1
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