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| -rw-r--r-- | Documentation/pcmcia/driver.rst | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/pcmcia/driver.rst b/Documentation/pcmcia/driver.rst new file mode 100644 index 000000000..5c4fe84d5 --- /dev/null +++ b/Documentation/pcmcia/driver.rst @@ -0,0 +1,30 @@ +============= +PCMCIA Driver +============= + +sysfs +----- + +New PCMCIA IDs may be added to a device driver pcmcia_device_id table at +runtime as shown below:: + + echo "match_flags manf_id card_id func_id function device_no \ + prod_id_hash[0] prod_id_hash[1] prod_id_hash[2] prod_id_hash[3]" > \ + /sys/bus/pcmcia/drivers/{driver}/new_id + +All fields are passed in as hexadecimal values (no leading 0x). +The meaning is described in the PCMCIA specification, the match_flags is +a bitwise or-ed combination from PCMCIA_DEV_ID_MATCH_* constants +defined in include/linux/mod_devicetable.h. + +Once added, the driver probe routine will be invoked for any unclaimed +PCMCIA device listed in its (newly updated) pcmcia_device_id list. + +A common use-case is to add a new device according to the manufacturer ID +and the card ID (form the manf_id and card_id file in the device tree). +For this, just use:: + + echo "0x3 manf_id card_id 0 0 0 0 0 0 0" > \ + /sys/bus/pcmcia/drivers/{driver}/new_id + +after loading the driver. |