From: Hou Zhiqiang <zhiqiang....@nxp.com>
[ Upstream commit 6f3ab451aa5c2cbff33197d82fe8489cbd55ad91 ]
The reset value of Primary, Secondary and Subordinate bus numbers is
zero which is a broken setup.
Program a sensible default value for Primary/Secondary/Subordinate
bus numbers.
Signed-off-by: Hou Zhiqiang <zhiqiang....@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieral...@arm.com>
Reviewed-by: Minghuan Lian <minghuan.l...@nxp.com>
Reviewed-by: Subrahmanya Lingappa <l.subrahma...@mobiveil.co.in>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/pci/controller/pcie-mobiveil.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/pci/controller/pcie-mobiveil.c
b/drivers/pci/controller/pcie-mobiveil.c
index 88e9b70081fc..e4a1964e1b43 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -501,6 +501,12 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
return err;
}
+ /* setup bus numbers */
+ value = csr_readl(pcie, PCI_PRIMARY_BUS);
+ value &= 0xff000000;
+ value |= 0x00ff0100;
+ csr_writel(pcie, value, PCI_PRIMARY_BUS);
+
/*
* program Bus Master Enable Bit in Command Register in PAB Config
* Space
--
2.20.1
