rockbox/firmware/export
Aidan MacDonald 92140752d7 FiiO M3K: disable CPU frequency switching
After conducting some simplistic tests, I found that the power usage
did not appear to be affected by the CPU frequency.

I tested by playing back a 44.1 KHz FLAC file on single track repeat,
and measured current with the AXP173's battery discharge current ADC.
The button and LCD backlights were set to always on. Headphones were
unplugged and the volume was muted to eliminate any influence from
the headphone amp.

On average the current usage was between 78-81 mA at 1008 MHz, 252 MHz,
and 112 MHz. If anything, 1008 MHz drew _less_ current than the lower
frequencies, by about 1-3 mA.

A possible explanation for this, assuming it's not just a bias of the
test, is that the CPU idle state saves so much power that it's better
to maximize the real time that the CPU spends idling. More systematic
testing is needed to confirm this.

Change-Id: I527473e8c4c12bc1e94f8d4e849fecc108022abe
2021-04-17 20:24:36 +00:00
..
config FiiO M3K: disable CPU frequency switching 2021-04-17 20:24:36 +00:00
adc.h adc-target.h: cleanup 2012-01-08 00:39:29 +00:00
aic3x.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
ak4376.h New port: FiiO M3K on bare metal 2021-03-28 00:01:37 +00:00
ak4537.h Radio and radio recording for Samsung YH-920. 2014-06-18 18:06:17 +00:00
akcodec.h
as3514.h as3514: document hardware setting based on as3514.c 2016-12-12 13:10:52 +01:00
as3525.h Move usb-s3c6400 register comments to usb-s3c6400.h 2011-12-13 04:21:06 +00:00
as3525v2.h as3525v2: use the new USB DesignWare driver 2016-08-15 02:56:23 +02:00
ascodec.h AMS: Return ascodec to interrupt-based I2C2 driver 2017-01-25 00:05:13 +01:00
at91sam9260.h
ata-defines.h Bulk convert all DOS line endings to UNIX. 2011-11-06 22:44:25 +00:00
ata-driver.h Add STORAGE_INIT_ATTR to some target-specific ATA functions. 2011-12-09 02:07:24 +00:00
ata.h pp5020: use ipod firmware timings for ATA PIO. 2020-11-04 03:03:19 +00:00
ata_idle_notify.h events: Rework event subsystem (add_event, send_event) to be more versatile. 2014-03-14 23:36:30 +01:00
ata_mmc.h Unify storage threads into one 2017-10-26 14:35:41 -04:00
audio.h [3/4] Completely remove HWCODEC support 2020-07-24 21:20:13 +00:00
audiohw.h New port: FiiO M3K on bare metal 2021-03-28 00:01:37 +00:00
audiohw_settings.h Add new audiohw capability: POWER_MODE_CAP 2021-03-22 13:00:11 +00:00
axp173.h New port: FiiO M3K on bare metal 2021-03-28 00:01:37 +00:00
backlight-sw-fading.h
backlight.h Fix red and remove duplicated function declaration 2019-02-08 00:04:20 +01:00
backtrace.h Initial commit for the Sony NWZ linux port 2017-09-05 21:42:12 +02:00
bidi.h
bitswap.h
bootchart.h
bootdata.h Add boot data support to rockbox. 2017-10-29 17:50:59 +01:00
button.h [4/4] Remove HAVE_LCD_BITMAP, as it's now the only choice. 2020-07-24 21:20:13 +00:00
codec-dx50.h Fix checkwps build for dx50 & dx90 targets 2020-04-14 08:15:19 +02:00
codec-dx90.h Fix checkwps build for dx50 & dx90 targets 2020-04-14 08:15:19 +02:00
config.h New port: FiiO M3K on bare metal 2021-03-28 00:01:37 +00:00
config_caps.h audio: Add support for 192 and 176KHz playback 2020-09-30 21:37:11 -04:00
cpu.h [1/4] Remove SH support and all archos targets 2020-07-24 21:20:13 +00:00
cs42l55.h iPod Classic: capture support for CS42L55 codec 2015-10-07 06:15:03 +02:00
cs4398.h cs4398: Change default volume to -25 dB (from 0 dB) 2020-08-29 08:51:35 -04:00
cscodec.h New port: iPod Classic (also known as iPod 6G/6.5G/7G) 2011-01-02 23:16:27 +00:00
dac3550a.h Straighten out the mad twisted state of sound.c and related areas. 2013-04-15 12:02:05 -04:00
debug.h Hosted: Merge debugf() implementations. Cleanup debug.h. 2012-01-21 18:39:19 +01:00
df1704.h ma9: Slightly change df1704 driver API. 2013-11-05 09:59:45 +04:00
disk.h Rewrite filesystem code (WIP) 2014-08-30 03:48:23 +02:00
dm320.h Sandisk Sansa Connect port (FS #12363) 2011-11-16 14:08:01 +00:00
ds2411.h
dsp-util.h Add rbcodecplatform.h and rbcodecconfig.h. 2012-05-03 14:49:35 +02:00
dummy_codec.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
eeprom_24cxx.h
eeprom_settings.h iriver_flash: update valid bootloaders table 2020-11-16 11:57:18 +00:00
enc_base.h Update software recording engine to latest codec interface. 2013-06-30 00:40:27 +02:00
erosqlinux_codec.h erosq: Tweak volume scale to be approximately correct 2021-04-17 12:09:19 +00:00
es9018.h Add Xuelin iHIFI 770/770C/800 support 2019-01-02 08:10:01 -05:00
events.h Get voice event out of playback.c 2017-12-12 20:28:56 -05:00
fat.h Do some housekeeping with fat.h and SECTOR_SIZE 2017-03-12 22:05:44 -04:00
fiiolinux_codec.h pcm: Get rid of pcm_play_pause() and associated APIs 2020-10-31 01:18:27 +00:00
fmradio.h
fmradio_3wire.h Radio and radio recording for Samsung YH-920. 2014-06-18 18:06:17 +00:00
fmradio_i2c.h
font.h [4/4] Remove HAVE_LCD_BITMAP, as it's now the only choice. 2020-07-24 21:20:13 +00:00
gdb_api.h
general.h [3/4] Completely remove HWCODEC support 2020-07-24 21:20:13 +00:00
generic_i2c.h
hangul.h
hd66789r.h
hosted_codec.h iBasso DX50/DX90: Major code cleanup and reorganization. 2015-02-02 21:57:55 +01:00
hostfs.h Define a USB storage type, and hook it up for hosted targets 2020-10-17 18:38:49 -04:00
hwcompat.h [1/4] Remove SH support and all archos targets 2020-07-24 21:20:13 +00:00
i2c-async.h Add asynchronous I2C bus API 2021-03-23 15:42:54 +00:00
i2c-coldfire.h
i2c-pp.h
i2c-rk27xx.h Rockchip rk27xx port initial commit. This is still work in progress. 2011-05-30 21:10:37 +00:00
i2c-s5l8700.h
i2c-s5l8702.h iPod Classic: HW initialization for RB 2016-05-25 12:23:47 +02:00
i2c.h imx233/fuze+: replace software i2c by hardware i2c, make some code more correct, reduce code size of lcd init sequences 2011-07-03 15:18:41 +00:00
i2s.h
iap.h iAP: lingo 1 (microphone) 2015-10-07 06:15:04 +02:00
ifp_usb_serial.h
imx31l.h Clean up multiple definitions of RAM size. Remove -DMEM (make) and MEM (code), use the already defined MEMORYSIZE instead. 2011-02-02 17:43:32 +00:00
imx233-codec.h imx233: slightly rework 3D audio setting 2016-12-12 12:15:24 +01:00
imx233.h imx233: fix soc header for stmp3600 and stmp3700 2013-06-18 15:33:07 +02:00
installer.h New port: FiiO M3K on bare metal 2021-03-28 00:01:37 +00:00
ipod_remote_tuner.h Improve radio RDS driver and framework 2017-02-11 22:19:32 -05:00
isp1362.h
isp1583.h creative zvm isp1583 defines: move to isp1583.h 2011-12-31 18:44:32 +00:00
jz4740-codec.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
jz4740.h jz4740: a few minor fixes 2013-03-11 08:33:18 +01:00
jz4760b.h jz4760: Heavily rework USB driver to add working DMA support 2020-09-17 11:26:04 -04:00
jz_mxu.h
lcd-remote.h lcd_framebuffer bugfixes, sanity checks 2020-10-31 01:11:30 -04:00
lcd.h Revert "lcd framebuffer - Bugfix #2 ensure proper alignment" 2021-03-25 06:34:58 +00:00
led.h
load_code.h Rewrite filesystem code (WIP) 2014-08-30 03:48:23 +02:00
logdiskf.h logdiskf.h - fix wrong cpp conditionals 2012-10-22 22:36:11 +02:00
logf.h Don't add new message to logf when we dump it to file 2016-04-04 11:07:44 +02:00
ltv350qv.h
lv24020lp.h
m5636.h
m66591.h
mc13783.h imx31: Work around an apparently not-quite-kosher abuse of CPP 2020-10-13 15:48:31 -04:00
mcf5249.h
mcf5250.h
mi4-loader.h Enable boot from SD for Sansa e200 2020-08-19 19:17:01 -04:00
mips-archdefs.h
mips.h
mipsregs.h
mmc.h Cleanup MV/MD macros a little. 2013-08-17 12:18:22 -04:00
mpr121.h zenxfi3: rewrite mpr121 driver 2016-06-01 23:09:27 +02:00
mv.h Define a USB storage type, and hook it up for hosted targets 2020-10-17 18:38:49 -04:00
nand.h Cleanup MV/MD macros a little. 2013-08-17 12:18:22 -04:00
nand_id.h
nwzlinux_codec.h nwzlinux: add support for radio 2017-11-06 21:37:06 +01:00
ohci.h
panic.h panicf doesn't return so why not tell GCC and $AVE : 2014-08-25 13:55:16 -04:00
pathfuncs.h Revert root_redirect :( 2020-08-20 21:54:00 -04:00
pca9555.h Introduce HiFi E.T MA9 port. 2013-05-06 14:09:24 +04:00
pcf5060x.h
pcf5063x.h iPod Classic: ADC updates 2016-08-12 14:17:46 +02:00
pcf50605.h
pcf50606.h
pcf50635.h
pcm-internal.h pcm: Get rid of pcm_play_pause() and associated APIs 2020-10-31 01:18:27 +00:00
pcm.h pcm: Further cleanup of unused bits of the PCM ACPI: 2020-11-12 15:59:09 +00:00
pcm1792.h Introduce HiFi E.T. MA8/MA8C ports. 2013-11-05 09:59:45 +04:00
pcm_mixer.h hosted: Improve buffer underrun handling in the ALSA driver 2020-11-18 14:38:12 -05:00
pcm_sampr.h audio: Add support for 192 and 176KHz playback 2020-09-30 21:37:11 -04:00
pcm_sw_volume.h Provide high resolution volume and prescaler to hosted targets. 2013-04-27 06:59:27 +02:00
pl080.h headers: Don't blindly include <inttypes.h> in files used by ASM 2020-03-29 00:49:06 +01:00
pl081.h
pl180.h
pnx0101.h
power.h Rework powermgmt to enable code re-use on appliation and sims. 2012-01-03 23:44:38 +00:00
powermgmt.h usb_hid: switch Battery Strength to use feature reports 2021-03-10 04:09:46 -06:00
pp5002.h Revise the PCM callback system after adding multichannel audio. 2012-03-03 07:23:38 +01:00
pp5020.h H10 PP Crash -- Fixed 2021-04-01 00:52:57 -04:00
pp5024.h
pp6100.h sansaview: fix lcd code 2014-05-11 19:56:43 +02:00
profile.h
qt1106.h
r61509.h
ramdisk.h Cleanup MV/MD macros a little. 2013-08-17 12:18:22 -04:00
rbpaths.h misc: Only include rbpaths.h and string-extra.h in places that need it 2021-04-10 12:08:12 -04:00
rda5802.h
rds.h Improve radio RDS driver and framework 2017-02-11 22:19:32 -05:00
rk27xx.h Add Xuelin iHIFI 770/770C/800 support 2019-01-02 08:10:01 -05:00
rk27xx_codec.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
rkw-loader.h rename rkw.h header file 2012-03-04 00:36:02 +01:00
rocker_codec.h pcm: Get rid of pcm_play_pause() and associated APIs 2020-10-31 01:18:27 +00:00
rolo.h hosted: Add ROLO support for hosted targets 2020-10-11 14:18:42 +00:00
rtc.h [1/4] Remove SH support and all archos targets 2020-07-24 21:20:13 +00:00
s3c2440.h
s5l8700.h headers: Don't blindly include <inttypes.h> in files used by ASM 2020-03-29 00:49:06 +01:00
s5l8702.h headers: Don't blindly include <inttypes.h> in files used by ASM 2020-03-29 00:49:06 +01:00
screendump.h [4/4] Remove HAVE_LCD_BITMAP, as it's now the only choice. 2020-07-24 21:20:13 +00:00
scroll_engine.h [4/4] Remove HAVE_LCD_BITMAP, as it's now the only choice. 2020-07-24 21:20:13 +00:00
sd.h Unify storage threads into one 2017-10-26 14:35:41 -04:00
sdmmc.h imx233: merge sd and mmc drivers, fix dma issues 2012-08-18 18:24:42 +02:00
serial.h
si4700.h Improve radio RDS driver and framework 2017-02-11 22:19:32 -05:00
sound.h Revert "sound: add sound_numdecimals() to round out the sound setting query API" 2021-04-09 10:52:02 +00:00
spdif.h
spi.h Clean spi.h and spi-target.h 2012-01-07 22:04:12 +00:00
stfm1000.h zenxfi3&stfm1000: implement fmradio i2c and debug screen 2012-05-19 18:04:25 +02:00
storage.h Define a USB storage type, and hook it up for hosted targets 2020-10-17 18:38:49 -04:00
structec.h
sw_i2c.h
synaptics-mep.h SA9200: Adjust touchpad sensitivities so that actual contact with the player is needed to cause button presses and hopefully those settings will work nicely. Add a parameter read function to the MEP driver for debugging and RE purposes; enable compilation of it if you want to use it. Make a note in power-sa9200.c about button inits. 2011-01-11 23:48:29 +00:00
synaptics-rmi.h fuze+: rewrite touchpad driver 2016-06-01 23:08:17 +02:00
system.h Fix MIPS cache operations and enable HAVE_CPU_CACHE_ALIGN on MIPS 2021-03-03 20:50:28 +00:00
tcc77x.h
tcc780x.h
tea5760.h
tea5767.h
timer.h Fix timer Agptek Rocker (other hosted players) 2019-10-17 21:19:00 +02:00
tlv320.h tlv320: document audiohw setting based on tlv320.c 2016-12-12 13:13:52 +01:00
touchpad.h touch devices: Disable touch on softlock. 2013-09-05 20:02:07 +02:00
touchscreen.h fix red 2013-09-05 20:35:51 +02:00
tsc200x.h
tsc2100.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
tuner.h [1/4] Remove SH support and all archos targets 2020-07-24 21:20:13 +00:00
uc870x.h iPod Classic: updates for uc8702 driver 2016-05-13 23:21:42 +02:00
uda1341.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
uda1380.h uda1380: document audiohw setting based on uda1380.c 2016-12-12 13:14:22 +01:00
udacodec.h
usb-designware.h Introduce new USB driver for Synopsys DesignWare USB OTG core. 2016-08-02 04:57:49 +02:00
usb-s3c6400x.h GHWCFG* are not as3525v2 specific 2012-01-01 19:21:49 +00:00
usb-tcc.h
usb.h FS13257: Fix inconsistent defaults in the USB mode selection 2020-11-16 17:11:38 +00:00
usb_ch9.h
usb_core.h usb: move usb charging function prototype from usb_core.h to usb.h 2015-01-08 16:44:55 +01:00
usb_drv.h usb: implement macro for initializing USB strings 2021-03-25 13:26:03 -05:00
wm8731.h wm8731: document audiohw settings 2016-12-12 13:11:25 +01:00
wm8740.h Add Xuelin iHIFI 770/770C/800 support 2019-01-02 08:10:01 -05:00
wm8751.h wm8751: document and fix audiohw settings 2016-12-12 13:12:15 +01:00
wm8758.h wm8758: document and fix audiohw settings 2016-12-12 13:12:47 +01:00
wm8975.h wm8975: document audiohw settings 2016-12-12 13:13:13 +01:00
wm8978.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
wm8985.h Do some cleanup, adjustment and a couple fixes to recent sound changes. 2013-04-22 20:38:17 -04:00
wmcodec.h
xduoolinux_codec.h pcm: Get rid of pcm_play_pause() and associated APIs 2020-10-31 01:18:27 +00:00