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* x86, olpc: fix model detection without OFWChris Ball2009-02-141-1/+1
| | | | | | | | | | | | | | | | | | Impact: fix "garbled display, laptop is unusable" bug Commit e51a1ac2dfca9ad869471e88f828281db7e810c0 ("x86, olpc: fix endian bug in openfirmware workaround") breaks model comparison on OLPC; the value 0xc2 needs to be scaled up by olpc_board(). The pre-patch version was wrong, but accidentally worked anyway (big-endian 0xc2 is big enough to satisfy all other board revisions, but little endian 0xc2 is not). Signed-off-by: Chris Ball <cjb@laptop.org> Cc: Andrew Morton <akpm@linux-foundation.org> Acked-by: Andres Salomon <dilinger@queued.net> Cc: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, olpc: fix endian bug in openfirmware workaroundHarvey Harrison2008-09-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | Boardrev is always treated as a u32 everywhere else, no reason to byteswap the 0xc2 value. The only use is to print out if it is a prerelease board, the test being: (olpc_platform_info.boardrev & 0xf) < 8 Which is currently always true as be32_to_cpu(0xc2) & 0xf = 0 but I doubt that was the intention here. The consequences of the bug are pretty minor though (incorrect boardrev displayed in dmesg when ofw support not configured) Also annotate the temporary used to read the boardrev in the ofw case. The confusion was noticed by Sparse: arch/x86/kernel/olpc.c:206:32: warning: cast to restricted __be32 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: olpc: add One Laptop Per Child architecture supportAndres Salomon2008-04-291-0/+260
This adds support for OLPC XO hardware. Open Firmware on XOs don't contain the VSA, so it is necessary to emulate the PCI BARs in the kernel. This also adds functionality for running EC commands, and a CONFIG_OLPC. A number of OLPC drivers depend upon CONFIG_OLPC. olpc_ec_timeout is a hack to work around Embedded Controller bugs. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: geode_has_vsa build fix] [akpm@linux-foundation.org: olpc_register_battery_callback doesn't exist] Signed-off-by: Andres Salomon <dilinger@debian.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Cc: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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