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Message-Id: <20190206205106.11517-1-mdf@kernel.org>
Date: Wed, 6 Feb 2019 12:51:06 -0800
From: Moritz Fischer <mdf@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-usb@...r.kernel.org, netdev@...r.kernel.org,
colin.king@...onical.com, linus.walleij@...aro.org,
yuehaibing@...wei.com, mcgrof@...nel.org, frowand.list@...il.com,
robh+dt@...nel.org, UNGLinuxDriver@...rochip.com,
woojung.huh@...rochip.com, hkallweit1@...il.com,
davem@...emloft.net, f.fainelli@...il.com,
vivien.didelot@...il.com, andrew@...n.ch, moritz@...us.com,
alex.williams@...com, Moritz Fischer <mdf@...nel.org>
Subject: [RFC net-next] net: fixed_phy: Move the DT based link GPIO parsing to of_mdio.c
Move the DT based link GPIO parsing to of_mdio and let the places
that register a fixed_phy pass in a GPIO descriptor or NULL.
This allows fixed_phy on non-DT platforms to have link GPIOs, too.
Signed-off-by: Moritz Fischer <mdf@...nel.org>
---
drivers/net/dsa/dsa_loop.c | 2 +-
drivers/net/ethernet/broadcom/bgmac.c | 2 +-
drivers/net/ethernet/broadcom/genet/bcmmii.c | 2 +-
drivers/net/phy/fixed_phy.c | 48 ++------------------
drivers/net/usb/lan78xx.c | 2 +-
drivers/of/of_mdio.c | 15 +++++-
include/linux/phy_fixed.h | 3 +-
7 files changed, 23 insertions(+), 51 deletions(-)
diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c
index 17482ae09aa5..7f124c620092 100644
--- a/drivers/net/dsa/dsa_loop.c
+++ b/drivers/net/dsa/dsa_loop.c
@@ -343,7 +343,7 @@ static int __init dsa_loop_init(void)
unsigned int i;
for (i = 0; i < NUM_FIXED_PHYS; i++)
- phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL);
+ phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL, NULL);
return mdio_driver_register(&dsa_loop_drv);
}
diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 4632dd5dbad1..bce644dec5c2 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1446,7 +1446,7 @@ int bgmac_phy_connect_direct(struct bgmac *bgmac)
struct phy_device *phy_dev;
int err;
- phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
+ phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, NULL, NULL);
if (!phy_dev || IS_ERR(phy_dev)) {
dev_err(bgmac->dev, "Failed to register fixed PHY device\n");
return -ENODEV;
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 51880d83131a..7cbd737aba80 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -525,7 +525,7 @@ static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv)
.asym_pause = 0,
};
- phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
+ phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL, NULL);
if (!phydev || IS_ERR(phydev)) {
dev_err(kdev, "failed to register fixed PHY device\n");
return -ENODEV;
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index d810f914aaa4..845bd7c2065a 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -18,6 +18,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
+#include <linux/of_mdio.h>
#include <linux/gpio/consumer.h>
#include <linux/seqlock.h>
#include <linux/idr.h>
@@ -191,50 +192,12 @@ static void fixed_phy_del(int phy_addr)
}
}
-#ifdef CONFIG_OF_GPIO
-static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np)
-{
- struct device_node *fixed_link_node;
- struct gpio_desc *gpiod;
-
- if (!np)
- return NULL;
-
- fixed_link_node = of_get_child_by_name(np, "fixed-link");
- if (!fixed_link_node)
- return NULL;
-
- /*
- * As the fixed link is just a device tree node without any
- * Linux device associated with it, we simply have obtain
- * the GPIO descriptor from the device tree like this.
- */
- gpiod = gpiod_get_from_of_node(fixed_link_node, "link-gpios", 0,
- GPIOD_IN, "mdio");
- of_node_put(fixed_link_node);
- if (IS_ERR(gpiod)) {
- if (PTR_ERR(gpiod) == -EPROBE_DEFER)
- return gpiod;
- pr_err("error getting GPIO for fixed link %pOF, proceed without\n",
- fixed_link_node);
- gpiod = NULL;
- }
-
- return gpiod;
-}
-#else
-static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np)
-{
- return NULL;
-}
-#endif
-
struct phy_device *fixed_phy_register(unsigned int irq,
struct fixed_phy_status *status,
- struct device_node *np)
+ struct device_node *np,
+ struct gpio_desc *gpiod)
{
struct fixed_mdio_bus *fmb = &platform_fmb;
- struct gpio_desc *gpiod = NULL;
struct phy_device *phy;
int phy_addr;
int ret;
@@ -242,11 +205,6 @@ struct phy_device *fixed_phy_register(unsigned int irq,
if (!fmb->mii_bus || fmb->mii_bus->state != MDIOBUS_REGISTERED)
return ERR_PTR(-EPROBE_DEFER);
- /* Check if we have a GPIO associated with this fixed phy */
- gpiod = fixed_phy_get_gpiod(np);
- if (IS_ERR(gpiod))
- return ERR_CAST(gpiod);
-
/* Get the next available PHY address, up to PHY_MAX_ADDR */
phy_addr = ida_simple_get(&phy_fixed_ida, 0, PHY_MAX_ADDR, GFP_KERNEL);
if (phy_addr < 0)
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 3d92ea6fcc02..bd88f0aef2fa 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2051,7 +2051,7 @@ static struct phy_device *lan7801_phy_init(struct lan78xx_net *dev)
phydev = phy_find_first(dev->mdiobus);
if (!phydev) {
netdev_dbg(dev->net, "PHY Not Found!! Registering Fixed PHY\n");
- phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
+ phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL, NULL);
if (IS_ERR(phydev)) {
netdev_err(dev->net, "No PHY/fixed_PHY found\n");
return NULL;
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index de6157357e26..6be2120b5f03 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -20,6 +20,7 @@
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/module.h>
+#include <linux/gpio/consumer.h>
#define DEFAULT_GPIO_RESET_DELAY 10 /* in microseconds */
@@ -460,6 +461,7 @@ int of_phy_register_fixed_link(struct device_node *np)
{
struct fixed_phy_status status = {};
struct device_node *fixed_link_node;
+ struct gpio_desc *gpiod = NULL;
u32 fixed_link_prop[5];
const char *managed;
@@ -483,7 +485,17 @@ int of_phy_register_fixed_link(struct device_node *np)
status.pause = of_property_read_bool(fixed_link_node, "pause");
status.asym_pause = of_property_read_bool(fixed_link_node,
"asym-pause");
+
+ gpiod = gpiod_get_from_of_node(fixed_link_node, "link-gpios", 0,
+ GPIOD_IN, "mdio");
of_node_put(fixed_link_node);
+ if (IS_ERR(gpiod)) {
+ if (PTR_ERR(gpiod) == -EPROBE_DEFER)
+ return PTR_ERR(gpiod);
+ pr_err("error getting GPIO for fixed link %pOF, proceed without\n",
+ fixed_link_node);
+ gpiod = NULL;
+ }
goto register_phy;
}
@@ -502,7 +514,8 @@ int of_phy_register_fixed_link(struct device_node *np)
return -ENODEV;
register_phy:
- return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np));
+ return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np,
+ gpiod));
}
EXPORT_SYMBOL(of_phy_register_fixed_link);
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index c78fc203db43..69caa8cda767 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -18,7 +18,8 @@ extern int fixed_phy_add(unsigned int irq, int phy_id,
struct fixed_phy_status *status);
extern struct phy_device *fixed_phy_register(unsigned int irq,
struct fixed_phy_status *status,
- struct device_node *np);
+ struct device_node *np,
+ struct gpio_desc *gpiod);
extern void fixed_phy_unregister(struct phy_device *phydev);
extern int fixed_phy_set_link_update(struct phy_device *phydev,
int (*link_update)(struct net_device *,
--
2.20.1
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