From: Kishon Vijay Abraham I <kishon@ti.com>
To: Tero Kristo <t-kristo@ti.com>, Nishanth Menon <nm@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Tom Joseph <tjoseph@cadence.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: <linux-omap@vger.kernel.org>,
Kishon Vijay Abraham I <kishon@ti.com>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-pci@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH 2/3] PCI: j721e: Get offset within "syscon" from "ti,syscon-pcie-ctrl" phandle arg
Date: Mon, 16 Nov 2020 23:01:40 +0530 [thread overview]
Message-ID: <20201116173141.31873-3-kishon@ti.com> (raw)
In-Reply-To: <20201116173141.31873-1-kishon@ti.com>
Get "syscon" pcie_ctrl offset from the argument of "ti,syscon-pcie-ctrl"
phandle. Previously a subnode to "syscon" node was added which has the
exact memory mapped address of pcie_ctrl but now the offset of pcie_ctrl
within "syscon" is now being passed as argument to "ti,syscon-pcie-ctrl"
phandle.
Link: http://lore.kernel.org/r/CAL_JsqKiUcO76bo1GoepWM1TusJWoty_BRy2hFSgtEVMqtrvvQ@mail.gmail.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/controller/cadence/pci-j721e.c | 28 +++++++++++++++-------
1 file changed, 19 insertions(+), 9 deletions(-)
diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 586b9d69fa5e..d615e6313252 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -12,6 +12,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/syscon.h>
+#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pci.h>
@@ -153,7 +154,8 @@ static const struct cdns_pcie_ops j721e_pcie_ops = {
.link_up = j721e_pcie_link_up,
};
-static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
+static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon,
+ unsigned int offset)
{
struct device *dev = pcie->dev;
u32 mask = J721E_MODE_RC;
@@ -164,7 +166,7 @@ static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
if (mode == PCI_MODE_RC)
val = J721E_MODE_RC;
- ret = regmap_update_bits(syscon, 0, mask, val);
+ ret = regmap_update_bits(syscon, offset, mask, val);
if (ret)
dev_err(dev, "failed to set pcie mode\n");
@@ -172,7 +174,7 @@ static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
}
static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
- struct regmap *syscon)
+ struct regmap *syscon, unsigned int offset)
{
struct device *dev = pcie->dev;
struct device_node *np = dev->of_node;
@@ -185,7 +187,7 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
link_speed = 2;
val = link_speed - 1;
- ret = regmap_update_bits(syscon, 0, GENERATION_SEL_MASK, val);
+ ret = regmap_update_bits(syscon, offset, GENERATION_SEL_MASK, val);
if (ret)
dev_err(dev, "failed to set link speed\n");
@@ -193,7 +195,7 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
}
static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie,
- struct regmap *syscon)
+ struct regmap *syscon, unsigned int offset)
{
struct device *dev = pcie->dev;
u32 lanes = pcie->num_lanes;
@@ -201,7 +203,7 @@ static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie,
int ret;
val = LANE_COUNT(lanes - 1);
- ret = regmap_update_bits(syscon, 0, LANE_COUNT_MASK, val);
+ ret = regmap_update_bits(syscon, offset, LANE_COUNT_MASK, val);
if (ret)
dev_err(dev, "failed to set link count\n");
@@ -212,6 +214,7 @@ static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie)
{
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node;
+ struct of_phandle_args args;
struct regmap *syscon;
int ret;
@@ -221,19 +224,26 @@ static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie)
return PTR_ERR(syscon);
}
- ret = j721e_pcie_set_mode(pcie, syscon);
+ ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1,
+ 0, &args);
+ if (ret) {
+ dev_err(dev, "failed to parse ti,syscon-pcie-ctrl\n");
+ return ret;
+ }
+
+ ret = j721e_pcie_set_mode(pcie, syscon, args.args[0]);
if (ret < 0) {
dev_err(dev, "Failed to set pci mode\n");
return ret;
}
- ret = j721e_pcie_set_link_speed(pcie, syscon);
+ ret = j721e_pcie_set_link_speed(pcie, syscon, args.args[0]);
if (ret < 0) {
dev_err(dev, "Failed to set link speed\n");
return ret;
}
- ret = j721e_pcie_set_lane_count(pcie, syscon);
+ ret = j721e_pcie_set_lane_count(pcie, syscon, args.args[0]);
if (ret < 0) {
dev_err(dev, "Failed to set num-lanes\n");
return ret;
--
2.17.1
next prev parent reply other threads:[~2020-11-16 17:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-16 17:31 [PATCH 0/3] PCI: J721E: Fix Broken DT w.r.t SYSCON DT Kishon Vijay Abraham I
2020-11-16 17:31 ` [PATCH 1/3] dt-bindings: pci: ti,j721e: Fix "ti,syscon-pcie-ctrl" to take argument Kishon Vijay Abraham I
2020-11-18 21:11 ` Rob Herring
2020-11-20 5:09 ` Kishon Vijay Abraham I
2020-11-26 12:53 ` Kishon Vijay Abraham I
2020-11-30 16:12 ` Rob Herring
2020-11-19 13:41 ` [PATCH 1/3] dt-bindings: pci: ti, j721e: Fix "ti, syscon-pcie-ctrl" " Rob Herring
2020-11-16 17:31 ` Kishon Vijay Abraham I [this message]
2020-11-16 17:31 ` [PATCH 3/3] arm64: dts: ti: k3-j721e-main: Remove "syscon" nodes added for pcieX_ctrl Kishon Vijay Abraham I
2020-11-18 21:14 ` Rob Herring
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