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Inspired by Andy Shevchenko's proposal to use get_unaligned_leXX().
The whole one time programable memory is treated as a single 64bit
little endian value. Thus we can avoid a lot of messy handling
of fields overlapping byte boundaries by just loading and manipulating
it as an __le64 converted to a u64. That lets us just use FIELD_GET()
and GENMASK() to extract the values desired.
Note only build tested. We need to use GENMASK_ULL and %llX formatters
to account for the larger types used in computing the various fields.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201128185156.428327-1-jic23@kernel.org
Link: https://lore.kernel.org/r/20201129184459.647538-1-jic23@kernel.org
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