€•u      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ0/translations/zh_CN/driver-api/mmc/mmc-dev-parts”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/zh_TW/driver-api/mmc/mmc-dev-parts”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/it_IT/driver-api/mmc/mmc-dev-parts”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/ja_JP/driver-api/mmc/mmc-dev-parts”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/ko_KR/driver-api/mmc/mmc-dev-parts”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ0/translations/sp_SP/driver-api/mmc/mmc-dev-parts”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒSD and MMC Device Partitions”h]”hŒSD and MMC Device Partitions”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒJ/var/lib/git/docbuild/linux/Documentation/driver-api/mmc/mmc-dev-parts.rst”h KubhŒ	paragraph”“”)”}”(hŒTDevice partitions are additional logical block devices present on the
SD/MMC device.”h]”hŒTDevice partitions are additional logical block devices present on the
SD/MMC device.”…””}”(hh¹hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒAs of this writing, MMC boot partitions as supported and exposed as
/dev/mmcblkXboot0 and /dev/mmcblkXboot1, where X is the index of the
parent /dev/mmcblkX.”h]”hŒAs of this writing, MMC boot partitions as supported and exposed as
/dev/mmcblkXboot0 and /dev/mmcblkXboot1, where X is the index of the
parent /dev/mmcblkX.”…””}”(hhÇhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒMMC Boot Partitions”h]”hŒMMC Boot Partitions”…””}”(hhØhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hhÕhžhhŸh¶h Kubh¸)”}”(hX1  Read and write access is provided to the two MMC boot partitions. Due to
the sensitive nature of the boot partition contents, which often store
a bootloader or bootloader configuration tables crucial to booting the
platform, write access is disabled by default to reduce the chance of
accidental bricking.”h]”hX1  Read and write access is provided to the two MMC boot partitions. Due to
the sensitive nature of the boot partition contents, which often store
a bootloader or bootloader configuration tables crucial to booting the
platform, write access is disabled by default to reduce the chance of
accidental bricking.”…””}”(hhæhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhhÕhžhubh¸)”}”(hŒWTo enable write access to /dev/mmcblkXbootY, disable the forced read-only
access with::”h]”hŒVTo enable write access to /dev/mmcblkXbootY, disable the forced read-only
access with:”…””}”(hhôhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhhÕhžhubhŒliteral_block”“”)”}”(hŒ)echo 0 > /sys/block/mmcblkXbootY/force_ro”h]”hŒ)echo 0 > /sys/block/mmcblkXbootY/force_ro”…””}”hj  sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1j  hŸh¶h KhhÕhžhubh¸)”}”(hŒTo re-enable read-only access::”h]”hŒTo re-enable read-only access:”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhhÕhžhubj  )”}”(hŒ)echo 1 > /sys/block/mmcblkXbootY/force_ro”h]”hŒ)echo 1 > /sys/block/mmcblkXbootY/force_ro”…””}”hj"  sbah}”(h]”h ]”h"]”h$]”h&]”j  j  uh1j  hŸh¶h KhhÕhžhubh¸)”}”(hŒPThe boot partitions can also be locked read only until the next power on,
with::”h]”hŒOThe boot partitions can also be locked read only until the next power on,
with:”…””}”(hj0  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhhÕhžhubj  )”}”(hŒ<echo 1 > /sys/block/mmcblkXbootY/ro_lock_until_next_power_on”h]”hŒ<echo 1 > /sys/block/mmcblkXbootY/ro_lock_until_next_power_on”…””}”hj>  sbah}”(h]”h ]”h"]”h$]”h&]”j  j  uh1j  hŸh¶h K!hhÕhžhubh¸)”}”(hŒÌThis is a feature of the card and not of the kernel. If the card does
not support boot partition locking, the file will not exist. If the
feature has been disabled on the card, the file will be read-only.”h]”hŒÌThis is a feature of the card and not of the kernel. If the card does
not support boot partition locking, the file will not exist. If the
feature has been disabled on the card, the file will be read-only.”…””}”(hjL  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K#hhÕhžhubh¸)”}”(hŒ˜The boot partitions can also be locked permanently, but this feature is
not accessible through sysfs in order to avoid accidental or malicious
bricking.”h]”hŒ˜The boot partitions can also be locked permanently, but this feature is
not accessible through sysfs in order to avoid accidental or malicious
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