Add dev->acpi_init_gtm and store initial GTM values on host
initialization. If the field is valid, ATA_PFLAG_INIT_GTM_VALID flag
is set. This is to remember BIOS/firmware programmed initial timing
for later use before reset and mode configuration modify it.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/ata/libata-acpi.c | 3 +++
include/linux/libata.h | 2 ++
2 files changed, 5 insertions(+)
Index: work/drivers/ata/libata-acpi.c
===================================================================
--- work.orig/drivers/ata/libata-acpi.c
+++ work/drivers/ata/libata-acpi.c
@@ -94,6 +94,9 @@ static void ata_acpi_associate_ide_port(
dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
}
+
+ if (ata_acpi_gtm(ap, &ap->acpi_init_gtm) == 0)
+ ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
}
static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj,
Index: work/include/linux/libata.h
===================================================================
--- work.orig/include/linux/libata.h
+++ work/include/linux/libata.h
@@ -209,6 +209,7 @@ enum {
ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
+ ATA_PFLAG_INIT_GTM_VALID = (1 << 20), /* initial gtm data valid */
/* struct ata_queued_cmd flags */
ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
@@ -633,6 +634,7 @@ struct ata_port {
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
struct ata_acpi_gtm acpi_gtm;
+ struct ata_acpi_gtm acpi_init_gtm;
#endif
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
};
-
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