kernel_optimize_test/sound
Nicolin Chen 6c8ca30eec ASoC: fsl_ssi: Don't try to round-up for PM divisor calculation
According to i.MX6 Series Reference Manual, the formula to calculate
the sys clock is

sysclk rate = bclk rate * (div2 + 1) * (7 * psr + 1) * (pm + 1) * 2

Commit aafa85e71a ("ASoC: fsl_ssi: Add DAI master mode support for
SSI on i.MX series") added the divisor calculation which relies on
the clk_round_rate(). However, at that time, clk_round_rate() didn't
provide closest clock rates for some cases because it might not use
a correct rounding policy. So using the original formula (pm + 1) for
PM divisor was not able to give us a desired clock rate. And then we
used (pm + 2) to do the trick.

However, the clk-divider driver has been refined a lot since commit
b11d282dbe ("clk: divider: fix rate calculation for fractional rates")
Now using (pm + 2) trick would result an incorrect clock rate.

So this patch fixes the problem by removing the useless trick.

Reported-by: Stephane Cerveau <scerveau@voxtok.com>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-05 12:23:29 +00:00
..
aoa ALSA: i2sbus: Deletion of unnecessary checks before the function call "release_and_free_resource" 2014-12-03 07:59:04 +01:00
arm Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
atmel Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
core ALSA: seq-dummy: remove deadlock-causing events on close 2015-01-26 13:53:13 +01:00
drivers Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
firewire ALSA: firewire-lib: limit the MIDI data rate 2015-01-16 22:51:23 +01:00
i2c ALSA: ak411x: Fix stall in work callback 2015-01-28 22:29:20 +01:00
isa ALSA: sb: Deletion of unnecessary checks before two function calls 2014-11-21 20:07:36 +01:00
mips Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
oss Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
parisc
pci ALSA: hda - Add new GPU codec ID 0x10de0072 to snd-hda 2015-01-07 07:55:42 +01:00
pcmcia
ppc Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
sh
soc ASoC: fsl_ssi: Don't try to round-up for PM divisor calculation 2015-03-05 12:23:29 +00:00
sparc Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
spi
synth
usb ALSA: usb-audio: Add mic volume fix quirk for Logitech Webcam C210 2015-01-18 10:03:50 +01:00
ac97_bus.c
Kconfig
last.c
Makefile
sound_core.c
sound_firmware.c