diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2011-07-04 14:03:17 +0800 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2011-07-27 09:30:56 +0800 |
| commit | 6ca1a113791eb09dac8c48b2b264c4d72aab410f (patch) | |
| tree | 1c889fc0c3e942c89c1241f433f2c8758e9d24e2 /drivers/of/of_net.c | |
| parent | 0ca1e290b7c517300bf6cc4f14ebcedb5dfea5cc (diff) | |
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>
Diffstat (limited to 'drivers/of/of_net.c')
| -rw-r--r-- | drivers/of/of_net.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c index 86f334a2769..cc117db0589 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 |