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dt/net: add helper function of_get_phy_mode

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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>
This commit is contained in:
Shawn Guo 2011-07-04 14:03:17 +08:00
parent 0ca1e290b7
commit 6ca1a11379
2 changed files with 44 additions and 0 deletions
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43
drivers/of/of_net.c
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@ -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

1
include/linux/of_net.h
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@ -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