Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2051e924 authored by Suthikulpanit, Suravee's avatar Suthikulpanit, Suravee Committed by Rafael J. Wysocki
Browse files

ata: ahci_platform: Add ACPI _CLS matching 



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: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: default avatarSuravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 26095a01

drivers/ata/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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.

drivers/ata/ahci_platform.c

+9 −0
Original line number Diff line number Diff line
@@ -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"
@@ -79,12 +81,19 @@ 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,

	},

};