diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2014-02-22 16:53:30 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-02-22 21:35:41 +0100 |
| commit | 039ece38da45f5e6a94be3aa7611cf3634bc2461 (patch) | |
| tree | c496379b086ca1c4251b1fd914ecafb68eb22063 /drivers/ata/ahci.h | |
| parent | ata: libahci: replace obsolete simple_strtoul() with kstrtouint() (diff) | |
| download | linux-039ece38da45f5e6a94be3aa7611cf3634bc2461.tar.xz linux-039ece38da45f5e6a94be3aa7611cf3634bc2461.zip | |
libahci: Allow drivers to override start_engine
Allwinner A10 and A20 ARM SoCs have an AHCI sata controller which needs a
special register to be poked before starting the DMA engine.
This register gets reset on an ahci_stop_engine call, so there is no other
place then ahci_start_engine where this poking can be done.
This commit allows drivers to override ahci_start_engine behavior for use by
the Allwinner AHCI driver (and potentially other drivers in the future).
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci.h')
| -rw-r--r-- | drivers/ata/ahci.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h index 2289efdf8203..64d1a99de5e4 100644 --- a/drivers/ata/ahci.h +++ b/drivers/ata/ahci.h @@ -323,6 +323,12 @@ struct ahci_host_priv { u32 em_msg_type; /* EM message type */ struct clk *clk; /* Only for platforms supporting clk */ void *plat_data; /* Other platform data */ + /* + * Optional ahci_start_engine override, if not set this gets set to the + * default ahci_start_engine during ahci_save_initial_config, this can + * be overridden anytime before the host is activated. + */ + void (*start_engine)(struct ata_port *ap); }; extern int ahci_ignore_sss; |