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Message-ID: <20140630144114.GB25926@lee--X1>
Date: Mon, 30 Jun 2014 15:41:14 +0100
From: Lee Jones <lee.jones@...aro.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
kishon@...com
Cc: kernel@...inux.com
Subject: [PATCH v2 4/5] phy: miphy365x: Represent each PHY channel as a
subnode
phy: miphy365x: Represent each PHY channel as a DT subnode
This has the added advantages of being able to enable/disable each
of the channels as simply as enabling/disabling the DT node.
Suggested-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c
index 1109f42..2c4ea6e 100644
--- a/drivers/phy/phy-miphy365x.c
+++ b/drivers/phy/phy-miphy365x.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <linux/of_address.h>
#include <linux/clk.h>
#include <linux/phy/phy.h>
#include <linux/delay.h>
@@ -144,6 +145,7 @@ struct miphy365x {
void __iomem *pcie;
u8 type;
u8 port;
+ bool enabled;
};
struct miphy365x_dev {
@@ -468,7 +470,7 @@ static struct phy *miphy365x_xlate(struct device *dev,
struct miphy365x_dev *state = dev_get_drvdata(dev);
u8 port, type;
- if (args->count != 2) {
+ if (args->args_count != 2) {
dev_err(dev, "Invalid number of cells in 'phy' property\n");
return ERR_PTR(-EINVAL);
}
@@ -484,6 +486,11 @@ static struct phy *miphy365x_xlate(struct device *dev,
if (WARN_ON(port >= ARRAY_SIZE(ports)))
return ERR_PTR(-EINVAL);
+ if (!state->phys[port].enabled) {
+ dev_warn(dev, "PHY port %d is disabled\n", port);
+ return ERR_PTR(-EINVAL);
+ }
+
if (type == MIPHY_TYPE_SATA)
state->phys[port].base = state->phys[port].sata;
else if (type == MIPHY_TYPE_PCIE)
@@ -503,38 +510,75 @@ static struct phy_ops miphy365x_ops = {
.owner = THIS_MODULE,
};
-static int miphy365x_get_base_addr(struct platform_device *pdev,
- struct miphy365x_phy *phy, u8 port)
+static int miphy365x_get_base_addr_one(struct platform_device *pdev,
+ struct miphy365x *phy,
+ struct device_node *child,
+ int index)
{
- struct resource *res;
- char type[6];
+ void __iomem *base;
+ const char *name;
+ int ret;
- sprintf(type, "sata%d", port);
+ base = of_iomap(child, index);
+ if (!base) {
+ dev_err(&pdev->dev, "Failed to map %s\n", child->full_name);
+ return -EINVAL;
+ }
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type);
- if (!res)
- return -ENODEV;
+ ret = of_property_read_string_index(child, "reg-names", index, &name);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "%s: no reg-names property not found\n", child->name);
+ return ret;
+ }
- phy->sata = devm_ioremap(&pdev->dev, res->start, resource_size(res));
- if (!phy->sata)
- return -ENOMEM;
+ if (!strncmp(name, "sata", 4))
+ phy->sata = base;
+ else if (!strncmp(name, "pcie", 4))
+ phy->pcie = base;
+ else {
+ dev_err(&pdev->dev, "reg-names in %s not sata or pcie: %s",
+ child->name, name);
+ return -EINVAL;
+ }
- sprintf(type, "pcie%d", port);
+ return 0;
+}
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type);
- if (!res)
- return -ENODEV;
+static int miphy365x_get_base_addr(struct platform_device *pdev,
+ struct miphy365x *phy,
+ struct device_node *child)
+{
+ int index;
+ int ret;
- phy->pcie = devm_ioremap(&pdev->dev, res->start, resource_size(res));
- if (!phy->pcie)
- return -ENOMEM;
+ /* Each port handles SATA or PCIE. */
+ for (index = 0; index < 2; index++) {
+ ret = miphy365x_get_base_addr_one(pdev, phy,
+ child, index);
+ if (ret)
+ return ret;
+ }
return 0;
}
-static int miphy365x_of_probe(struct device_node *np,
+static int miphy365x_of_probe(struct platform_device *pdev,
struct miphy365x_dev *phy_dev)
{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *child;
+ int child_count = 0;
+
+ for_each_child_of_node(np, child)
+ child_count++;
+
+ if (child_count != ARRAY_SIZE(ports)) {
+ dev_err(&pdev->dev, "%d ports supported, %d supplied\n",
+ ARRAY_SIZE(ports), child_count);
+ return -EINVAL;
+ }
+
phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
if (IS_ERR(phy_dev->regmap)) {
dev_err(phy_dev->dev, "No syscfg phandle specified\n");
@@ -556,11 +600,10 @@ static int miphy365x_of_probe(struct device_node *np,
static int miphy365x_probe(struct platform_device *pdev)
{
- struct device_node *np = pdev->dev.of_node;
+ struct device_node *child, *np = pdev->dev.of_node;
struct miphy365x_dev *phy_dev;
struct device *dev = &pdev->dev;
struct phy_provider *provider;
- u8 port;
int ret;
if (!np) {
@@ -572,7 +615,7 @@ static int miphy365x_probe(struct platform_device *pdev)
if (!phy_dev)
return -ENOMEM;
- ret = miphy365x_of_probe(np, phy_dev);
+ ret = miphy365x_of_probe(pdev, phy_dev);
if (ret)
return ret;
@@ -582,8 +625,9 @@ static int miphy365x_probe(struct platform_device *pdev)
mutex_init(&phy_dev->miphy_mutex);
- for (port = 0; port < ARRAY_SIZE(ports); port++) {
+ for_each_child_of_node(np, child) {
struct phy *phy;
+ static int port = 0;
phy = devm_phy_create(dev, &miphy365x_ops, NULL);
if (IS_ERR(phy)) {
@@ -591,15 +635,17 @@ static int miphy365x_probe(struct platform_device *pdev)
return PTR_ERR(phy);
}
- phy_dev->phys[port].phy = phy;
- phy_dev->phys[port].port = port;
-
- ret = miphy365x_get_base_addr(pdev,
- &phy_dev->phys[port], port);
+ ret = miphy365x_get_base_addr(pdev, &phy_dev->phys[port],
+ child);
if (ret)
return ret;
+ phy_dev->phys[port].phy = phy;
+ phy_dev->phys[port].port = port;
+ phy_dev->phys[port].enabled = !!of_device_is_available(child);
+
phy_set_drvdata(phy, &phy_dev->phys[port]);
+ port++;
}
provider = devm_of_phy_provider_register(dev, miphy365x_xlate);
--
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