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authorShawn Guo <shawn.guo@linaro.org>2011-07-04 10:03:17 +0400
committerShawn Guo <shawn.guo@linaro.org>2011-07-27 05:30:56 +0400
commit6ca1a113791eb09dac8c48b2b264c4d72aab410f (patch)
tree1c889fc0c3e942c89c1241f433f2c8758e9d24e2
parent0ca1e290b7c517300bf6cc4f14ebcedb5dfea5cc (diff)
downloadlinux-6ca1a113791eb09dac8c48b2b264c4d72aab410f.tar.xz
dt/net: add helper function of_get_phy_mode
It adds the helper function of_get_phy_mode getting phy interface from device tree. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Grant Likely <grant.likely@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David Miller <davem@davemloft.net>
-rw-r--r--drivers/of/of_net.c43
-rw-r--r--include/linux/of_net.h1
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
index 86f334a2769c..cc117db05891 100644
--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -8,6 +8,49 @@
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/of_net.h>
+#include <linux/phy.h>
+
+/**
+ * It maps 'enum phy_interface_t' found in include/linux/phy.h
+ * into the device tree binding of 'phy-mode', so that Ethernet
+ * device driver can get phy interface from device tree.
+ */
+static const char *phy_modes[] = {
+ [PHY_INTERFACE_MODE_MII] = "mii",
+ [PHY_INTERFACE_MODE_GMII] = "gmii",
+ [PHY_INTERFACE_MODE_SGMII] = "sgmii",
+ [PHY_INTERFACE_MODE_TBI] = "tbi",
+ [PHY_INTERFACE_MODE_RMII] = "rmii",
+ [PHY_INTERFACE_MODE_RGMII] = "rgmii",
+ [PHY_INTERFACE_MODE_RGMII_ID] = "rgmii-id",
+ [PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
+ [PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
+ [PHY_INTERFACE_MODE_RTBI] = "rtbi",
+};
+
+/**
+ * of_get_phy_mode - Get phy mode for given device_node
+ * @np: Pointer to the given device_node
+ *
+ * The function gets phy interface string from property 'phy-mode',
+ * and return its index in phy_modes table, or errno in error case.
+ */
+const int of_get_phy_mode(struct device_node *np)
+{
+ const char *pm;
+ int err, i;
+
+ err = of_property_read_string(np, "phy-mode", &pm);
+ if (err < 0)
+ return err;
+
+ for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
+ if (!strcasecmp(pm, phy_modes[i]))
+ return i;
+
+ return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(of_get_phy_mode);
/**
* Search the device tree for the best MAC address to use. 'mac-address' is
diff --git a/include/linux/of_net.h b/include/linux/of_net.h
index e913081fb52a..f47464188710 100644
--- a/include/linux/of_net.h
+++ b/include/linux/of_net.h
@@ -9,6 +9,7 @@
#ifdef CONFIG_OF_NET
#include <linux/of.h>
+extern const int of_get_phy_mode(struct device_node *np);
extern const void *of_get_mac_address(struct device_node *np);
#endif