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| /openbmc/linux/drivers/media/i2c/ |
| H A D | max2175.c | 672c29b9 Fri Aug 30 08:48:27 CDT 2019 Geert Uytterhoeven <geert+renesas@glider.be> media: i2c: Use div64_ul() for u64-by-unsigned-long divide
div_u64() does a 64-by-32 division, while the divisor max2175.xtal_freq
is unsigned long, thus 64-bit on 64-bit platforms. Hence the proper
function to call is div64_ul().
Note that this change does not have any functional impact, as the
crystal frequency must be much lower than the 32-bit limit anyway.
On 32-bit platforms, the generated code is the same. But at least on
arm64, this saves an AND-instruction to truncate xtal_freq to 32-bit.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
672c29b9 Fri Aug 30 08:48:27 CDT 2019 Geert Uytterhoeven <geert+renesas@glider.be> media: i2c: Use div64_ul() for u64-by-unsigned-long divide
div_u64() does a 64-by-32 division, while the divisor max2175.xtal_freq
is unsigned long, thus 64-bit on 64-bit platforms. Hence the proper
function to call is div64_ul().
Note that this change does not have any functional impact, as the
crystal frequency must be much lower than the 32-bit limit anyway.
On 32-bit platforms, the generated code is the same. But at least on
arm64, this saves an AND-instruction to truncate xtal_freq to 32-bit.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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