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From b0c6ae0f8948a2be6bf4e8b4bbab9ca1343289b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Wed, 2 Sep 2020 16:43:44 +0200
Subject: [PATCH] PCI: aardvark: Fix initialization with old Marvell's Arm
Trusted Firmware
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Old ATF automatically power on pcie phy and does not provide SMC call for
phy power on functionality which leads to aardvark initialization failure:
[ 0.330134] mvebu-a3700-comphy d0018300.phy: unsupported SMC call, try updating your firmware
[ 0.338846] phy phy-d0018300.phy.1: phy poweron failed --> -95
[ 0.344753] advk-pcie d0070000.pcie: Failed to initialize PHY (-95)
[ 0.351160] advk-pcie: probe of d0070000.pcie failed with error -95
This patch fixes above failure by ignoring 'not supported' error in
aardvark driver. In this case it is expected that phy is already power on.
Tested-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Link: https://lore.kernel.org/r/20200902144344.16684-3-pali@kernel.org
Fixes: 366697018c9a ("PCI: aardvark: Add PHY support")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: <stable@vger.kernel.org> # 5.8+: ea17a0f153af: phy: marvell: comphy: Convert internal SMCC firmware return codes to errno
---
drivers/pci/controller/pci-aardvark.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1124,7 +1124,9 @@ static int advk_pcie_enable_phy(struct a
}
ret = phy_power_on(pcie->phy);
- if (ret) {
+ if (ret == -EOPNOTSUPP) {
+ dev_warn(&pcie->pdev->dev, "PHY unsupported by firmware\n");
+ } else if (ret) {
phy_exit(pcie->phy);
return ret;
}
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