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Subject[PATCH v3 4/4] pci: dwc: pci-dra7xx: Enable errata i870 for both EP and RC mode
Date
Errata i870 is applicable in both EP and RC mode. Therefore rename
function dra7xx_pcie_ep_unaligned_memaccess(), that implements errata
workaround, to dra7xx_pcie_unaligned_memaccess() and call it from a
common place. So, that errata workaround is applied for both modes of
operation.

Reported-by: Chris Welch <Chris.Welch@viavisolutions.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
v3:
collect ACKs.
Fix s/appplied/applied.

drivers/pci/controller/dwc/pci-dra7xx.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index ce9224a36f62..43711561a199 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -542,7 +542,7 @@ static const struct of_device_id of_dra7xx_pcie_match[] = {
};

/*
- * dra7xx_pcie_ep_unaligned_memaccess: workaround for AM572x/AM571x Errata i870
+ * dra7xx_pcie_unaligned_memaccess: workaround for AM572x/AM571x Errata i870
* @dra7xx: the dra7xx device where the workaround should be applied
*
* Access to the PCIe slave port that are not 32-bit aligned will result
@@ -552,7 +552,7 @@ static const struct of_device_id of_dra7xx_pcie_match[] = {
*
* To avoid this issue set PCIE_SS1_AXI2OCP_LEGACY_MODE_ENABLE to 1.
*/
-static int dra7xx_pcie_ep_unaligned_memaccess(struct device *dev)
+static int dra7xx_pcie_unaligned_memaccess(struct device *dev)
{
int ret;
struct device_node *np = dev->of_node;
@@ -695,6 +695,10 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
if (dra7xx->link_gen < 0 || dra7xx->link_gen > 2)
dra7xx->link_gen = 2;

+ ret = dra7xx_pcie_unaligned_memaccess(dev);
+ if (ret)
+ dev_err(dev, "WA for Errata i870 not applied. Update DT\n");
+
switch (mode) {
case DW_PCIE_RC_TYPE:
if (!IS_ENABLED(CONFIG_PCI_DRA7XX_HOST)) {
@@ -717,10 +721,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
dra7xx_pcie_writel(dra7xx, PCIECTRL_TI_CONF_DEVICE_TYPE,
DEVICE_TYPE_EP);

- ret = dra7xx_pcie_ep_unaligned_memaccess(dev);
- if (ret)
- goto err_gpio;
-
ret = dra7xx_add_pcie_ep(dra7xx, pdev);
if (ret < 0)
goto err_gpio;
--
2.18.0
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