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Subject[PATCH] ata: ahci_platform: Add ACPI support for AMD Seattle SATA controller
Date
From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>

This patch adds ACPI support for non-PCI SATA contoller in ahci_platform driver.
It adds ACPI matching table in ahci_platform to support AMD Seattle SATA controller
with following ASL structure in DSDT:

Device (SATA0)
{
Name(_HID, "AMDI0600") // Seattle AHSATA
Name (_CCA, 1) // Cache-coherent controller
Name (_CRS, ResourceTemplate ()
{
Memory32Fixed (ReadWrite, 0xE0300000, 0x00010000)
Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive,,,) { 387 }
})
}

Since ATA driver should not require PCI support for ATA_ACPI,
this patch also removes dependency in the driver/ata/Kconfig.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/ata/Kconfig | 2 +-
drivers/ata/ahci_platform.c | 13 +++++++++++++
2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index e1b9278..f2e6c9e 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -48,7 +48,7 @@ config ATA_VERBOSE_ERROR

config ATA_ACPI
bool "ATA ACPI Support"
- depends on ACPI && PCI
+ depends on ACPI
default y
help
This option adds support for ATA-related ACPI objects.
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index f61ddb9..3499bab 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -20,6 +20,9 @@
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
+#ifdef CONFIG_ATA_ACPI
+#include <linux/acpi.h>
+#endif
#include "ahci.h"

static const struct ata_port_info ahci_port_info = {
@@ -87,6 +90,13 @@ static const struct of_device_id ahci_of_match[] = {
};
MODULE_DEVICE_TABLE(of, ahci_of_match);

+#ifdef CONFIG_ATA_ACPI
+static const struct acpi_device_id ahci_acpi_match[] = {
+ { "AMDI0600", 0 }, /* AMD Seattle AHCI */
+ { },
+};
+#endif
+
static struct platform_driver ahci_driver = {
.probe = ahci_probe,
.remove = ata_platform_remove_one,
@@ -94,6 +104,9 @@ static struct platform_driver ahci_driver = {
.name = "ahci",
.owner = THIS_MODULE,
.of_match_table = ahci_of_match,
+#ifdef CONFIG_ATA_ACPI
+ .acpi_match_table = ACPI_PTR(ahci_acpi_match),
+#endif
.pm = &ahci_pm_ops,
},
};
--
1.9.3


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