linux-kernel - [PATCH 14/23] PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number

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Message-ID: <20181106131807.29951-15-Zhiqiang.Hou@nxp.com>
Date:   Tue, 6 Nov 2018 13:20:35 +0000
From:   "Z.q. Hou" <zhiqiang.hou@....com>
To:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "l.subrahmanya@...iveil.co.in" <l.subrahmanya@...iveil.co.in>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Leo Li <leoyang.li@....com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>
CC:     Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Xiaowei Bao <xiaowei.bao@....com>,
        "Z.q. Hou" <zhiqiang.hou@....com>
Subject: [PATCH 14/23] PCI: mobiveil: initialize Primary/Secondary/Subordinate
 bus number

From: Hou Zhiqiang <Zhiqiang.Hou@....com>

The reset value is all zero, so set a workable value for Primary,
Secondary and Subordinate bus numbers.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
---
 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 3da924bb6b3c..8d6a1e98f655 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -581,6 +581,12 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 	u32 value, pab_ctrl, type;
 	struct resource_entry *win;
 
+	/* 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
-- 
2.17.1