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author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
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committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /Documentation/pcmcia/driver.txt | |
parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'Documentation/pcmcia/driver.txt')
-rw-r--r-- | Documentation/pcmcia/driver.txt | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/pcmcia/driver.txt b/Documentation/pcmcia/driver.txt new file mode 100644 index 00000000..0ac16792 --- /dev/null +++ b/Documentation/pcmcia/driver.txt @@ -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. |