sata: xgene: add ACPI support for APM X-Gene SATA ports

This adds ACPI support for the APM X-Gene SATA ports. When the system
boots using ACPI table, the SATA ports are able to configure using the
values supplied by the ACPI table rather than the DTS.

Signed-off-by: Feng Kan <fkan@apm.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index 2e8bb60..2b78510 100644 (file)
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -22,6 +22,7 @@
  * NOTE: PM support is not currently available.
  *
  */
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/ahci_platform.h>
@@ -718,6 +719,14 @@ disable_resources:
        return rc;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_ahci_acpi_match[] = {
+       { "APMC0D0D", },
+       { }
+};
+MODULE_DEVICE_TABLE(acpi, xgene_ahci_acpi_match);
+#endif
+
 static const struct of_device_id xgene_ahci_of_match[] = {
        {.compatible = "apm,xgene-ahci"},
        {},
@@ -730,6 +739,7 @@ static struct platform_driver xgene_ahci_driver = {
        .driver = {
                .name = DRV_NAME,
                .of_match_table = xgene_ahci_of_match,
+               .acpi_match_table = ACPI_PTR(xgene_ahci_acpi_match),
        },
 };