linux-kernel - [PATCH 06/10] PCI: dwc: designware: Parse *num-lanes* property in dw_pcie_setup

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Message-ID: <1487164699-30708-7-git-send-email-kishon@ti.com>
Date:   Wed, 15 Feb 2017 18:48:15 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Jingoo Han <jingoohan1@...il.com>,
        <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>,
        <linuxppc-dev@...ts.ozlabs.org>, <linux-arm-kernel@...s.com>
CC:     <nsekhar@...com>, Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 06/10] PCI: dwc: designware: Parse *num-lanes* property in dw_pcie_setup_rc

*num-lanes* dt property is parsed in dw_pcie_host_init. However
*num-lanes* property is applicable to both root complex mode and
endpoint mode. As a first step, move the parsing of this property
outside dw_pcie_host_init. This is in preparation for splitting
pcie-designware.c to pcie-designware.c and pcie-designware-host.c

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/pci/dwc/pcie-designware.c |   18 +++++++++++-------
 drivers/pci/dwc/pcie-designware.h |    1 -
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index be61039..237da48 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -548,10 +548,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		}
 	}
 
-	ret = of_property_read_u32(np, "num-lanes", &pci->lanes);
-	if (ret)
-		pci->lanes = 0;
-
 	ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
 	if (ret)
 		pci->num_viewport = 2;
@@ -748,13 +744,21 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
 
 void dw_pcie_setup_rc(struct pcie_port *pp)
 {
+	int ret;
+	u32 lanes;
 	u32 val;
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct device *dev = pci->dev;
+	struct device_node *np = dev->of_node;
+
+	ret = of_property_read_u32(np, "num-lanes", &lanes);
+	if (ret)
+		lanes = 0;
 
 	/* set the number of lanes */
 	val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);
 	val &= ~PORT_LINK_MODE_MASK;
-	switch (pci->lanes) {
+	switch (lanes) {
 	case 1:
 		val |= PORT_LINK_MODE_1_LANES;
 		break;
@@ -768,7 +772,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
 		val |= PORT_LINK_MODE_8_LANES;
 		break;
 	default:
-		dev_err(pci->dev, "num-lanes %u: invalid value\n", pci->lanes);
+		dev_err(pci->dev, "num-lanes %u: invalid value\n", lanes);
 		return;
 	}
 	dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val);
@@ -776,7 +780,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
 	/* set link width speed control register */
 	val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
 	val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
-	switch (pci->lanes) {
+	switch (lanes) {
 	case 1:
 		val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
 		break;
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index b23a5b3..1fbe3b8 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -147,7 +147,6 @@ struct dw_pcie_ops {
 struct dw_pcie {
 	struct device		*dev;
 	void __iomem		*dbi_base;
-	u32			lanes;
 	u32			num_viewport;
 	u8			iatu_unroll_enabled;
 	struct pcie_port	pp;
-- 
1.7.9.5