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phy: fixed_phy: Add gpio to determine link up/down.

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An SFP module may have a link up/down status pin which can be
connection to a GPIO line of the host. Add support for reading such an
GPIO in the fixed_phy driver.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2015-08-31 15:56:53 +02:00
committed by David S. Miller
parent 8b59d19e74
commit a5597008db
9 changed files with 59 additions and 15 deletions
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13
drivers/of/of_mdio.c
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@@ -16,6 +16,7 @@
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/module.h>
@@ -294,6 +295,7 @@ int of_phy_register_fixed_link(struct device_node *np)
struct fixed_phy_status status = {};
struct device_node *fixed_link_node;
const __be32 *fixed_link_prop;
int link_gpio;
int len, err;
struct phy_device *phy;
const char *managed;
@@ -302,7 +304,7 @@ int of_phy_register_fixed_link(struct device_node *np)
if (err == 0) {
if (strcmp(managed, "in-band-status") == 0) {
/* status is zeroed, namely its .link member */
phy = fixed_phy_register(PHY_POLL, &status, np);
phy = fixed_phy_register(PHY_POLL, &status, -1, np);
return IS_ERR(phy) ? PTR_ERR(phy) : 0;
}
}
@@ -318,8 +320,13 @@ 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");
link_gpio = of_get_named_gpio_flags(fixed_link_node,
"link-gpios", 0, NULL);
of_node_put(fixed_link_node);
phy = fixed_phy_register(PHY_POLL, &status, np);
if (link_gpio == -EPROBE_DEFER)
return -EPROBE_DEFER;
phy = fixed_phy_register(PHY_POLL, &status, link_gpio, np);
return IS_ERR(phy) ? PTR_ERR(phy) : 0;
}
@@ -331,7 +338,7 @@ int of_phy_register_fixed_link(struct device_node *np)
status.speed = be32_to_cpu(fixed_link_prop[2]);
status.pause = be32_to_cpu(fixed_link_prop[3]);
status.asym_pause = be32_to_cpu(fixed_link_prop[4]);
phy = fixed_phy_register(PHY_POLL, &status, np);
phy = fixed_phy_register(PHY_POLL, &status, -1, np);
return IS_ERR(phy) ? PTR_ERR(phy) : 0;
}