brain-hackers_pepepper-mirror
/
linux-brain
mirror of https://github.com/brain-hackers/linux-brain.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

ata: ahci_brcm: Add missing clock management during recovery 

commit bf0e5013bc2dcac205417e1252205dca39dfc005 upstream.

The downstream implementation of ahci_brcm.c did contain clock
management recovery, but until recently, did that outside of the
libahci_platform helpers and this was unintentionally stripped out while
forward porting the patch upstream.

Add the missing clock management during recovery and sleep for 10
milliseconds per the design team recommendations to ensure the SATA PHY
controller and AFE have been fully quiesced.

Fixes: eb73390ae2 ("ata: ahci_brcm: Recover from failures to identify devices")
Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Florian Fainelli 2019-12-10 10:53:47 -08:00 committed by Greg Kroah-Hartman
parent d9295852f8
commit a3b6848e8d
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/ata/ahci_brcm.c
View File

@ -275,6 +275,13 @@ static unsigned int brcm_ahci_read_id(struct ata_device *dev,
/* Perform the SATA PHY reset sequence */
brcm_sata_phy_disable(priv, ap->port_no);
/* Reset the SATA clock */
ahci_platform_disable_clks(hpriv);
msleep(10);
ahci_platform_enable_clks(hpriv);
msleep(10);
/* Bring the PHY back on */
brcm_sata_phy_enable(priv, ap->port_no);