lkml.org 
[lkml]   [2020]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.9 27/91] ata: ahci_brcm: Allow optional reset controller to be used
Date
From: Florian Fainelli <f.fainelli@gmail.com>

commit 2b2c47d9e1fe90311b725125d6252a859ee87a79 upstream.

On BCM63138, we need to reset the AHCI core prior to start utilizing it,
grab the reset controller device cookie and do that.

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>

---
drivers/ata/ahci_brcm.c | 7 +++++++
1 file changed, 7 insertions(+)

--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/reset.h>
#include <linux/string.h>

#include "ahci.h"
@@ -88,6 +89,7 @@ struct brcm_ahci_priv {
u32 port_mask;
u32 quirks;
enum brcm_ahci_version version;
+ struct reset_control *rcdev;
};

static const struct ata_port_info ahci_brcm_port_info = {
@@ -332,6 +334,11 @@ static int brcm_ahci_probe(struct platfo
if (IS_ERR(priv->top_ctrl))
return PTR_ERR(priv->top_ctrl);

+ /* Reset is optional depending on platform */
+ priv->rcdev = devm_reset_control_get(&pdev->dev, "ahci");
+ if (!IS_ERR_OR_NULL(priv->rcdev))
+ reset_control_deassert(priv->rcdev);
+
if ((priv->version == BRCM_SATA_BCM7425) ||
(priv->version == BRCM_SATA_NSP)) {
priv->quirks |= BRCM_AHCI_QUIRK_NO_NCQ;

\
 
 \ /
  Last update: 2020-01-11 11:03    [W:0.206 / U:1.872 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site