On 2015/3/26 4:46, Suravee Suthikulpanit wrote:
> This patch adds ACPI supports for AHCI platform driver, which uses _CLS
> method to match the device.
>
> The following is an example of ASL structure in DSDT for a SATA controller,
> which contains _CLS package to be matched by the ahci_platform driver:
>
> Device (AHC0) // AHCI Controller
> {
> Name(_HID, "AMDI0600")
> Name (_CCA, 1)
> Name (_CLS, Package (3)
> {
> 0x01, // Base Class: Mass Storage
> 0x06, // Sub-Class: serial ATA
> 0x01, // Interface: AHCI
> })
> Name (_CRS, ResourceTemplate ()
> {
> Memory32Fixed (ReadWrite, 0xE0300000, 0x00010000)
> Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive,,,) { 387 }
> })
> }
>
> Also, since ATA driver should not require PCI support for ATA_ACPI,
> this patch removes dependency in the driver/ata/Kconfig.
>
> Acked-by: Tejun Heo <tj@xxxxxxxxxx>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
Reviewed-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Thanks
Hanjun
> ---
> drivers/ata/Kconfig | 2 +-
> drivers/ata/ahci_platform.c | 9 +++++++++
> 2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
> index 5f60155..50305e3 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 78d6ae0..0536940 100644
> --- a/drivers/ata/ahci_platform.c
> +++ b/drivers/ata/ahci_platform.c
> @@ -20,6 +20,8 @@
> #include <linux/platform_device.h>
> #include <linux/libata.h>
> #include <linux/ahci_platform.h>
> +#include <linux/acpi.h>
> +#include <linux/pci_ids.h>
> #include "ahci.h"
>
> #define DRV_NAME "ahci"
> @@ -78,12 +80,19 @@ static const struct of_device_id ahci_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, ahci_of_match);
>
> +static const struct acpi_device_id ahci_acpi_match[] = {
> + { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xFFFFFF) },
> + {},
> +};
> +MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
> +
> static struct platform_driver ahci_driver = {
> .probe = ahci_probe,
> .remove = ata_platform_remove_one,
> .driver = {
> .name = DRV_NAME,
> .of_match_table = ahci_of_match,
> + .acpi_match_table = ahci_acpi_match,
> .pm = &ahci_pm_ops,
> },
> };
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