lkml.org 
[lkml]   [2020]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ata: ahci: mvebu: Make SATA PHY optional for Armada 3720
Date
Older ATF does not provide SMC call for SATA phy power on functionality and
therefore initialization of ahci_mvebu is failing when older version of ATF
is using. In this case phy_power_on() function returns -EOPNOTSUPP.

This patch adds a new hflag AHCI_HFLAG_IGN_NOTSUPP_POWER_ON which cause
that ahci_platform_enable_phys() would ignore -EOPNOTSUPP errors from
phy_power_on() call.

It fixes initialization of ahci_mvebu on Espressobin boards where is older
Marvell's Arm Trusted Firmware without SMC call for SATA phy power.

This is regression introduced in commit 8e18c8e58da64 ("arm64: dts: marvell:
armada-3720-espressobin: declare SATA PHY property") where SATA phy was
defined and therefore ahci_platform_enable_phys() on Espressobin started
failing.

Signed-off-by: Pali Rohár <pali@kernel.org>
Tested-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Fixes: 8e18c8e58da64 ("arm64: dts: marvell: armada-3720-espressobin: declare SATA PHY property")
Cc: <stable@vger.kernel.org> # 5.1+: ea17a0f153af: phy: marvell: comphy: Convert internal SMCC firmware return codes to errno
---
drivers/ata/ahci.h | 2 ++
drivers/ata/ahci_mvebu.c | 2 +-
drivers/ata/libahci_platform.c | 2 +-
3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index d991dd46e89c..98b8baa47dc5 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -240,6 +240,8 @@ enum {
as default lpm_policy */
AHCI_HFLAG_SUSPEND_PHYS = (1 << 26), /* handle PHYs during
suspend/resume */
+ AHCI_HFLAG_IGN_NOTSUPP_POWER_ON = (1 << 27), /* ignore -EOPNOTSUPP
+ from phy_power_on() */

/* ap->flags bits */

diff --git a/drivers/ata/ahci_mvebu.c b/drivers/ata/ahci_mvebu.c
index d4bba3ace45d..3ad46d26d9d5 100644
--- a/drivers/ata/ahci_mvebu.c
+++ b/drivers/ata/ahci_mvebu.c
@@ -227,7 +227,7 @@ static const struct ahci_mvebu_plat_data ahci_mvebu_armada_380_plat_data = {

static const struct ahci_mvebu_plat_data ahci_mvebu_armada_3700_plat_data = {
.plat_config = ahci_mvebu_armada_3700_config,
- .flags = AHCI_HFLAG_SUSPEND_PHYS,
+ .flags = AHCI_HFLAG_SUSPEND_PHYS | AHCI_HFLAG_IGN_NOTSUPP_POWER_ON,
};

static const struct of_device_id ahci_mvebu_of_match[] = {
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 86261deeb4c5..de638dafce21 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -59,7 +59,7 @@ int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
}

rc = phy_power_on(hpriv->phys[i]);
- if (rc) {
+ if (rc && !(rc == -EOPNOTSUPP && (hpriv->flags & AHCI_HFLAG_IGN_NOTSUPP_POWER_ON))) {
phy_exit(hpriv->phys[i]);
goto disable_phys;
}
--
2.20.1
\
 
 \ /
  Last update: 2020-10-09 10:44    [W:0.048 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site