9d2ab99573
Add support to get and control a list of resets for the device as optional and shared. These resets must be kept de-asserted until the device is enabled. This is specified as shared because some SoCs like UniPhier series have common reset controls with all ahci controller instances. However, according to Thierry's view, https://www.spinics.net/lists/linux-ide/msg55357.html some hardware-specific drivers already use their own resets, and the common reset make a path to occur double controls of resets. The ahci_platform_get_resources() can get and control the reset only when the second argument includes AHCI_PLATFORM_GET_RESETS bit. Suggested-by: Hans de Goede <hdegoede@redhat.com> Cc: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/*
|
|
* AHCI SATA platform driver
|
|
*
|
|
* Copyright 2004-2005 Red Hat, Inc.
|
|
* Jeff Garzik <jgarzik@pobox.com>
|
|
* Copyright 2010 MontaVista Software, LLC.
|
|
* Anton Vorontsov <avorontsov@ru.mvista.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*/
|
|
|
|
#ifndef _AHCI_PLATFORM_H
|
|
#define _AHCI_PLATFORM_H
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
struct device;
|
|
struct ata_port_info;
|
|
struct ahci_host_priv;
|
|
struct platform_device;
|
|
struct scsi_host_template;
|
|
|
|
int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
|
|
void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
|
|
int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv);
|
|
void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv);
|
|
int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
|
|
void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
|
|
struct ahci_host_priv *ahci_platform_get_resources(
|
|
struct platform_device *pdev, unsigned int flags);
|
|
int ahci_platform_init_host(struct platform_device *pdev,
|
|
struct ahci_host_priv *hpriv,
|
|
const struct ata_port_info *pi_template,
|
|
struct scsi_host_template *sht);
|
|
|
|
void ahci_platform_shutdown(struct platform_device *pdev);
|
|
|
|
int ahci_platform_suspend_host(struct device *dev);
|
|
int ahci_platform_resume_host(struct device *dev);
|
|
int ahci_platform_suspend(struct device *dev);
|
|
int ahci_platform_resume(struct device *dev);
|
|
|
|
#define AHCI_PLATFORM_GET_RESETS 0x01
|
|
|
|
#endif /* _AHCI_PLATFORM_H */
|