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linux/3.2: allow to set platform_data for phy devices

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30905 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2012-03-12 16:28:00 +00:00
parent d4fa1a974d
commit 170eccd8a7
1 changed files with 115 additions and 0 deletions
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115
target/linux/generic/patches-3.2/710-phy-add-mdio_register_board_info.patch Normal file
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@ -0,0 +1,115 @@
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -36,6 +36,44 @@
#include <asm/irq.h>
#include <asm/uaccess.h>
+struct mdio_board_entry {
+ struct list_head list;
+ struct mdio_board_info board_info;
+};
+
+static LIST_HEAD(mdio_board_list);
+static DEFINE_MUTEX(mdio_board_lock);
+
+/**
+ * mdio_register_board_info - register PHY devices for a given board
+ * @info: array of chip descriptors
+ * @n: how many descriptors are provided
+ * Context: can sleep
+ *
+ * The board info passed can safely be __initdata ... but be careful of
+ * any embedded pointers (platform_data, etc), they're copied as-is.
+ */
+int __init
+mdiobus_register_board_info(struct mdio_board_info const *info, unsigned n)
+{
+ struct mdio_board_entry *be;
+ int i;
+
+ be = kzalloc(n * sizeof(*be), GFP_KERNEL);
+ if (!be)
+ return -ENOMEM;
+
+ for (i = 0; i < n; i++, be++, info++) {
+ memcpy(&be->board_info, info, sizeof(*info));
+ mutex_lock(&mdio_board_lock);
+ list_add_tail(&be->list, &mdio_board_list);
+ mutex_unlock(&mdio_board_lock);
+ }
+
+ return 0;
+}
+
+
/**
* mdiobus_alloc - allocate a mii_bus structure
*
@@ -179,15 +217,31 @@ void mdiobus_free(struct mii_bus *bus)
}
EXPORT_SYMBOL(mdiobus_free);
+static void mdiobus_setup_phydev_from_boardinfo(struct mii_bus *bus,
+ struct phy_device *phydev,
+ struct mdio_board_info *bi)
+{
+ if (strcmp(bus->id, bi->bus_id) ||
+ bi->phy_addr != phydev->addr)
+ return;
+
+ phydev->dev.platform_data = (void *) bi->platform_data;
+}
+
struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
{
struct phy_device *phydev;
+ struct mdio_board_entry *be;
int err;
phydev = get_phy_device(bus, addr);
if (IS_ERR(phydev) || phydev == NULL)
return phydev;
+ list_for_each_entry(be, &mdio_board_list, list)
+ mdiobus_setup_phydev_from_boardinfo(bus, phydev,
+ &be->board_info);
+
err = phy_device_register(phydev);
if (err) {
phy_device_free(phydev);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -394,8 +394,8 @@ struct phy_driver {
/* Determines the negotiated speed and duplex */
int (*read_status)(struct phy_device *phydev);
- /*
- * Update the value in phydev->link to reflect the
+ /*
+ * Update the value in phydev->link to reflect the
* current link value
*/
int (*update_link)(struct phy_device *phydev);
@@ -538,4 +538,22 @@ int __init mdio_bus_init(void);
void mdio_bus_exit(void);
extern struct bus_type mdio_bus_type;
+
+struct mdio_board_info {
+ const char *bus_id;
+ int phy_addr;
+
+ const void *platform_data;
+};
+
+#ifdef CONFIG_PHYLIB
+int mdiobus_register_board_info(struct mdio_board_info const *info, unsigned n);
+#else
+static inline int
+mdiobus_register_board_info(struct mdio_board_info const *info, unsigned n)
+{
+ return 0;
+}
+#endif
+
#endif /* __PHY_H */