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The SHDLC link layer of HCI based drivers uses CRC-CCITT and thus needs to select that kernel option. Otherwise it ends up with this linking error: net/built-in.o: In function `nfc_shdlc_add_len_crc': net/nfc/hci/shdlc.c:113: undefined reference to `crc_ccitt' Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
17 lines
514 B
Text
17 lines
514 B
Text
config NFC_HCI
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depends on NFC
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tristate "NFC HCI implementation"
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default n
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help
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Say Y here if you want to build support for a kernel NFC HCI
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implementation. This is mostly needed for devices that only process
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HCI frames, like for example the NXP pn544.
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config NFC_SHDLC
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depends on NFC_HCI
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select CRC_CCITT
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bool "SHDLC link layer for HCI based NFC drivers"
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default n
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---help---
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Say yes if you use an NFC HCI driver that requires SHDLC link layer.
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If unsure, say N here.
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