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phylib: Support phy module autoloading

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We don't use the normal hotplug mechanism because it doesn't work. It will
load the module some time after the device appears, but that's not good
enough for us -- we need the driver loaded _immediately_ because otherwise
the NIC driver may just abort and then the phy 'device' goes away.

[bwh: s/phy/mdio/ in module alias, kerneldoc for struct mdio_device_id]

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Woodhouse 2010-04-02 01:05:27 +00:00 • committed by David S. Miller
parent 9092c658ba
commit 8626d3b432
4 changed files with 65 additions and 0 deletions
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26
include/linux/mod_devicetable.h
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@ -474,4 +474,30 @@ struct platform_device_id {
__attribute__((aligned(sizeof(kernel_ulong_t))));
};
#define MDIO_MODULE_PREFIX "mdio:"
#define MDIO_ID_FMT "%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d"
#define MDIO_ID_ARGS(_id) \
(_id)>>31, ((_id)>>30) & 1, ((_id)>>29) & 1, ((_id)>>28) & 1, \
((_id)>>27) & 1, ((_id)>>26) & 1, ((_id)>>25) & 1, ((_id)>>24) & 1, \
((_id)>>23) & 1, ((_id)>>22) & 1, ((_id)>>21) & 1, ((_id)>>20) & 1, \
((_id)>>19) & 1, ((_id)>>18) & 1, ((_id)>>17) & 1, ((_id)>>16) & 1, \
((_id)>>15) & 1, ((_id)>>14) & 1, ((_id)>>13) & 1, ((_id)>>12) & 1, \
((_id)>>11) & 1, ((_id)>>10) & 1, ((_id)>>9) & 1, ((_id)>>8) & 1, \
((_id)>>7) & 1, ((_id)>>6) & 1, ((_id)>>5) & 1, ((_id)>>4) & 1, \
((_id)>>3) & 1, ((_id)>>2) & 1, ((_id)>>1) & 1, (_id) & 1
/**
* struct mdio_device_id - identifies PHY devices on an MDIO/MII bus
* @phy_id: The result of
* (mdio_read(&MII_PHYSID1) << 16 | mdio_read(&PHYSID2)) & @phy_id_mask
* for this PHY type
* @phy_id_mask: Defines the significant bits of @phy_id. A value of 0
* is used to terminate an array of struct mdio_device_id.
*/
struct mdio_device_id {
__u32 phy_id;
__u32 phy_id_mask;
};
#endif /* LINUX_MOD_DEVICETABLE_H */