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authorJonas Gorski <jogo@openwrt.org>2013-05-20 12:07:03 +0000
committerJonas Gorski <jogo@openwrt.org>2013-05-20 12:07:03 +0000
commitb751b5893c5403708ec095abe573ca1797366503 (patch)
tree2b885ab067d4cf16886914d1abddd9b321deadeb /target/linux/brcm2708
parent44696a01c7df631945c64a87f61cae638c60f5d8 (diff)
downloadupstream-b751b5893c5403708ec095abe573ca1797366503.tar.gz
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brcm2708: make it boot on revision 2 raspberry pis
* update the bootcode.bin to the newest version - gpu/cpu mem split is now configured through config.txt, so no need to create more than one sd card image (just edit the config.txt) - bootcode.bin now supports the never revision 2 raspberry pis * add a commented prepopulated config.txt for easier config changes Taken from <https://github.com/Evilpaul/RPi-config> Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 36668
Diffstat (limited to 'target/linux/brcm2708')
-rw-r--r--target/linux/brcm2708/image/Makefile16
-rw-r--r--target/linux/brcm2708/image/config.txt917
2 files changed, 924 insertions, 9 deletions
diff --git a/target/linux/brcm2708/image/Makefile b/target/linux/brcm2708/image/Makefile
index a8dbef1b81..6b4cf141a6 100644
--- a/target/linux/brcm2708/image/Makefile
+++ b/target/linux/brcm2708/image/Makefile
@@ -20,17 +20,17 @@ define Image/Build/RaspberryPi
mkdosfs $(KDIR)/boot.img -C $(FAT32_BLOCKS)
# Raspberry Pi has no bootloader, instead the GPU loads and starts the kernel
- mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm128_start.elf ::
- mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm192_start.elf ::
- mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm224_start.elf ::
mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/bootcode.bin ::
mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/COPYING.linux ::
mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/LICENCE.broadcom ::
- mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/loader.bin ::
- mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/arm$(2)_start.elf ::start.elf #Copy file for memory/gpu division
+ mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/start.elf ::
+ mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/start_cd.elf ::
+ mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/fixup.dat ::
+ mcopy -i $(KDIR)/boot.img $(BUILD_DIR)/brcm2708-gpu-fw-boot/fixup_cd.dat ::
mcopy -i $(KDIR)/boot.img cmdline.txt ::
+ mcopy -i $(KDIR)/boot.img config.txt ::
mcopy -i $(KDIR)/boot.img $(KDIR)/Image ::kernel.img # Copy OpenWrt built kernel
- ./gen_rpi_sdcard_img.sh $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1)_$(2).img $(KDIR)/boot.img $(KDIR)/root.$(1) \
+ ./gen_rpi_sdcard_img.sh $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img $(KDIR)/boot.img $(KDIR)/root.$(1) \
$(CONFIG_BRCM2708_SD_BOOT_PARTSIZE) $(CONFIG_TARGET_ROOTFS_PARTSIZE)
endef
@@ -38,9 +38,7 @@ define Image/Build
$(CP) $(KDIR)/root.$(1) $(BIN_DIR)/$(IMG_PREFIX)-$(1).img
$(CP) $(KDIR)/Image $(BIN_DIR)/$(IMG_PREFIX)-Image
- $(call Image/Build/RaspberryPi,$(1),128)
- $(call Image/Build/RaspberryPi,$(1),192)
- $(call Image/Build/RaspberryPi,$(1),224)
+ $(call Image/Build/RaspberryPi,$(1))
endef
$(eval $(call BuildImage))
diff --git a/target/linux/brcm2708/image/config.txt b/target/linux/brcm2708/image/config.txt
new file mode 100644
index 0000000000..36685e9f36
--- /dev/null
+++ b/target/linux/brcm2708/image/config.txt
@@ -0,0 +1,917 @@
+################################################################################
+## Raspberry Pi Configuration Settings
+##
+## Revision 14, 2012/10/22
+##
+## Details taken from the eLinux wiki
+## For up-to-date information please refer to wiki page.
+##
+## Wiki Location : http://elinux.org/RPi_config.txt
+##
+##
+## Description:
+## Details of each setting are described with each section that begins with
+## a double hashed comment ('##')
+## It is up to the user to remove the single hashed comment ('#') from each
+## option they want to enable, and to set the specific value of that option.
+##
+## WARNING: Setting the following combination of parameters will set a
+## permanent bit within the SOC and your warranty is void.
+## over_voltage>0, and at least one of the following:
+## force_turbo=1
+## current_limit_override=0x5A000020
+## temp_limit>85
+##
+## Overclock settings will be disabled at runtime if the SoC reaches temp_limit
+##
+################################################################################
+
+################################################################################
+## Standard Definition Video Settings
+################################################################################
+
+## sdtv_mode
+## defines the TV standard for composite output
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Normal NTSC (Default)
+## 1 Japanese version of NTSC - no pedestal
+## 2 Normal PAL
+## 3 Brazilian version of PAL - 525/60 rather than 625/50, different
+## subcarrier
+##
+#sdtv_mode=0
+
+## sdtv_aspect
+## defines the aspect ratio for composite output
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 1 4:3 (Default)
+## 2 14:9
+## 3 16:9
+##
+#sdtv_aspect=1
+
+## sdtv_disable_colourburst
+## Disables colour burst on composite output. The picture will be
+## monochrome, but possibly sharper
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Colour burst is enabled (Default)
+## 1 Colour burst is disabled
+##
+#sdtv_disable_colourburst=1
+
+################################################################################
+## High Definition Video Settings
+################################################################################
+
+## hdmi_safe
+## Use "safe mode" settings to try to boot with maximum hdmi compatibility.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Disabled (Default)
+## 1 Enabled (this does: hdmi_force_hotplug=1, config_hdmi_boost=4,
+## hdmi_group=1, hdmi_mode=1,
+## disable_overscan=0)
+##
+#hdmi_safe=1
+
+## hdmi_force_hotplug
+## Pretends HDMI hotplug signal is asserted so it appears a HDMI display
+## is attached
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Disabled (Default)
+## 1 Use HDMI mode even if no HDMI monitor is detected
+##
+#hdmi_force_hotplug=1
+
+## hdmi_ignore_hotplug
+## Pretends HDMI hotplug signal is not asserted so it appears a HDMI
+## display is not attached
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Disabled (Default)
+## 1 Use composite mode even if HDMI monitor is detected
+##
+#hdmi_ignore_hotplug=1
+
+## hdmi_drive
+## chooses between HDMI and DVI modes
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 1 Normal DVI mode (No sound)
+## 2 Normal HDMI mode (Sound will be sent if supported and enabled)
+##
+#hdmi_drive=2
+
+## hdmi_ignore_edid
+## Enables the ignoring of EDID/display data
+##
+#hdmi_ignore_edid=0xa5000080
+
+## hdmi_edid_file
+## Read the EDID data from the edid.dat file instead of from the attached
+## device
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Read EDID data from attached device (Default)
+## 1 Read EDID data from edid.txt file
+##
+#hdmi_edid_file=1
+
+## hdmi_force_edid_audio
+## Pretends all audio formats are supported by display, allowing
+## passthrough of DTS/AC3 even when not reported as supported.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Use EDID provided values (Default)
+## 1 Pretend all audio formats are supported
+##
+#hdmi_force_edid_audio=1
+
+## avoid_edid_fuzzy_match
+## Avoid fuzzy matching of modes described in edid.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Use fuzzy matching (Default)
+## 1 Avoid fuzzy matching
+##
+#avoid_edid_fuzzy_match=1
+
+## hdmi_group
+## Defines the HDMI type
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Use the preferred group reported by the edid (Default)
+## 1 CEA
+## 2 DMT
+##
+#hdmi_group=1
+
+## hdmi_mode
+## defines screen resolution in CEA or DMT format
+##
+## H means 16:9 variant (of a normally 4:3 mode).
+## 2x means pixel doubled (i.e. higher clock rate, with each pixel repeated
+## twice)
+## 4x means pixel quadrupled (i.e. higher clock rate, with each pixel
+## repeated four times)
+## reduced blanking means fewer bytes are used for blanking within the data
+## stream (i.e. lower clock rate, with fewer wasted bytes)
+##
+## Value hdmi_group=CEA hdmi_group=DMT
+## -------------------------------------------------------------------------
+## 1 VGA 640x350 85Hz
+## 2 480p 60Hz 640x400 85Hz
+## 3 480p 60Hz H 720x400 85Hz
+## 4 720p 60Hz 640x480 60Hz
+## 5 1080i 60Hz 640x480 72Hz
+## 6 480i 60Hz 640x480 75Hz
+## 7 480i 60Hz H 640x480 85Hz
+## 8 240p 60Hz 800x600 56Hz
+## 9 240p 60Hz H 800x600 60Hz
+## 10 480i 60Hz 4x 800x600 72Hz
+## 11 480i 60Hz 4x H 800x600 75Hz
+## 12 240p 60Hz 4x 800x600 85Hz
+## 13 240p 60Hz 4x H 800x600 120Hz
+## 14 480p 60Hz 2x 848x480 60Hz
+## 15 480p 60Hz 2x H 1024x768 43Hz DO NOT USE
+## 16 1080p 60Hz 1024x768 60Hz
+## 17 576p 50Hz 1024x768 70Hz
+## 18 576p 50Hz H 1024x768 75Hz
+## 19 720p 50Hz 1024x768 85Hz
+## 20 1080i 50Hz 1024x768 120Hz
+## 21 576i 50Hz 1152x864 75Hz
+## 22 576i 50Hz H 1280x768 reduced blanking
+## 23 288p 50Hz 1280x768 60Hz
+## 24 288p 50Hz H 1280x768 75Hz
+## 25 576i 50Hz 4x 1280x768 85Hz
+## 26 576i 50Hz 4x H 1280x768 120Hz reduced blanking
+## 27 288p 50Hz 4x 1280x800 reduced blanking
+## 28 288p 50Hz 4x H 1280x800 60Hz
+## 29 576p 50Hz 2x 1280x800 75Hz
+## 30 576p 50Hz 2x H 1280x800 85Hz
+## 31 1080p 50Hz 1280x800 120Hz reduced blanking
+## 32 1080p 24Hz 1280x960 60Hz
+## 33 1080p 25Hz 1280x960 85Hz
+## 34 1080p 30Hz 1280x960 120Hz reduced blanking
+## 35 480p 60Hz 4x 1280x1024 60Hz
+## 36 480p 60Hz 4x H 1280x1024 75Hz
+## 37 576p 50Hz 4x 1280x1024 85Hz
+## 38 576p 50Hz 4x H 1280x1024 120Hz reduced blanking
+## 39 1080i 50Hz reduced blanking 1360x768 60Hz
+## 40 1080i 100Hz 1360x768 120Hz reduced blanking
+## 41 720p 100Hz 1400x1050 reduced blanking
+## 42 576p 100Hz 1400x1050 60Hz
+## 43 576p 100Hz H 1400x1050 75Hz
+## 44 576i 100Hz 1400x1050 85Hz
+## 45 576i 100Hz H 1400x1050 120Hz reduced blanking
+## 46 1080i 120Hz 1440x900 reduced blanking
+## 47 720p 120Hz 1440x900 60Hz
+## 48 480p 120Hz 1440x900 75Hz
+## 49 480p 120Hz H 1440x900 85Hz
+## 50 480i 120Hz 1440x900 120Hz reduced blanking
+## 51 480i 120Hz H 1600x1200 60Hz
+## 52 576p 200Hz 1600x1200 65Hz
+## 53 576p 200Hz H 1600x1200 70Hz
+## 54 576i 200Hz 1600x1200 75Hz
+## 55 576i 200Hz H 1600x1200 85Hz
+## 56 480p 240Hz 1600x1200 120Hz reduced blanking
+## 57 480p 240Hz H 1680x1050 reduced blanking
+## 58 480i 240Hz 1680x1050 60Hz
+## 59 480i 240Hz H 1680x1050 75Hz
+## 60 1680x1050 85Hz
+## 61 1680x1050 120Hz reduced blanking
+## 62 1792x1344 60Hz
+## 63 1792x1344 75Hz
+## 64 1792x1344 120Hz reduced blanking
+## 65 1856x1392 60Hz
+## 66 1856x1392 75Hz
+## 67 1856x1392 120Hz reduced blanking
+## 68 1920x1200 reduced blanking
+## 69 1920x1200 60Hz
+## 70 1920x1200 75Hz
+## 71 1920x1200 85Hz
+## 72 1920x1200 120Hz reduced blanking
+## 73 1920x1440 60Hz
+## 74 1920x1440 75Hz
+## 75 1920x1440 120Hz reduced blanking
+## 76 2560x1600 reduced blanking
+## 77 2560x1600 60Hz
+## 78 2560x1600 75Hz
+## 79 2560x1600 85Hz
+## 80 2560x1600 120Hz reduced blanking
+## 81 1366x768 60Hz
+## 82 1080p 60Hz
+## 83 1600x900 reduced blanking
+## 84 2048x1152 reduced blanking
+## 85 720p 60Hz
+## 86 1366x768 reduced blanking
+##
+#hdmi_mode=1
+
+## config_hdmi_boost
+## configure the signal strength of the HDMI interface.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 (Default)
+## 1
+## 2
+## 3
+## 4 Try if you have interference issues with HDMI
+## 5
+## 6
+## 7 Maximum
+##
+#config_hdmi_boost=0
+
+## hdmi_ignore_cec_init
+## Doesn't sent initial active source message. Avoids bringing
+## (CEC enabled) TV out of standby and channel switch when rebooting.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Normal behaviour (Default)
+## 1 Doesn't sent initial active source message
+##
+#hdmi_ignore_cec_init=1
+
+## hdmi_ignore_cec
+## Pretends CEC is not supported at all by TV.
+## No CEC functions will be supported.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Normal behaviour (Default)
+## 1 Pretend CEC is not supported by TV
+##
+#hdmi_ignore_cec=1
+
+################################################################################
+## Overscan Video Settings
+################################################################################
+
+## overscan_left
+## Number of pixels to skip on left
+##
+#overscan_left=0
+
+## overscan_right
+## Number of pixels to skip on right
+##
+#overscan_right=0
+
+## overscan_top
+## Number of pixels to skip on top
+##
+#overscan_top=0
+
+## overscan_bottom
+## Number of pixels to skip on bottom
+##
+#overscan_bottom=0
+
+## disable_overscan
+## Set to 1 to disable overscan
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Overscan Enabled (Default)
+## 1 Overscan Disabled
+##
+#disable_overscan=1
+
+################################################################################
+## Framebuffer Video Settings
+################################################################################
+
+## framebuffer_width
+## Console framebuffer width in pixels. Default is display width minus
+## overscan.
+##
+#framebuffer_width=0
+
+## framebuffer_height
+## Console framebuffer height in pixels. Default is display height minus
+## overscan.
+##
+#framebuffer_height=0
+
+## framebuffer_depth
+## Console framebuffer depth in bits per pixel.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 8 Valid, but default RGB palette makes an unreadable screen
+## 16 (Default)
+## 24 Looks better but has corruption issues as of 2012/06/15
+## 32 Has no corruption issues but needs framebuffer_ignore_alpha=1
+## and shows the wrong colors as of 2012/06/15
+##
+#framebuffer_depth=16
+
+## framebuffer_ignore_alpha
+## Set to 1 to disable alpha channel. Helps with 32bit.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Enable Alpha Channel (Default)
+## 1 Disable Alpha Channel
+##
+#framebuffer_ignore_alpha=0
+
+################################################################################
+## General Video Settings
+################################################################################
+
+## display_rotate
+## Rotate the display clockwise or flip the display.
+## The 90 and 270 degrees rotation options require additional memory on GPU,
+## so won't work with the 16M GPU split.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 0 degrees (Default)
+## 1 90 degrees
+## 2 180 degrees
+## 3 270 degrees
+## 0x10000 Horizontal flip
+## 0x20000 Vertical flip
+##
+#display_rotate=0
+
+################################################################################
+## Licensed Codecs
+##
+## Hardware decoding of additional codecs can be enabled by purchasing a
+## license that is locked to the CPU serial number of your Raspberry Pi.
+##
+## Up to 8 licenses per CODEC can be specified as a comma seperated list.
+##
+################################################################################
+
+## decode_MPG2
+## License key to allow hardware MPEG-2 decoding.
+##
+#decode_MPG2=0x12345678
+
+## decode_WVC1
+## License key to allow hardware VC-1 decoding.
+##
+#decode_WVC1=0x12345678
+
+################################################################################
+## Test Settings
+################################################################################
+
+## test_mode
+## Enable test sound/image during boot for manufacturing test.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Disable Test Mod (Default)
+## 1 Enable Test Mode
+##
+#test_mode=0
+
+################################################################################
+## Memory Settings
+################################################################################
+
+## disable_l2cache
+## Disable arm access to GPU's L2 cache. Needs corresponding L2 disabled
+## kernel.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Enable L2 Cache (Default)
+## 1 Disable L2 cache
+##
+#disable_l2cache=0
+
+## gpu_mem
+## GPU memory allocation in MB for all board revisions.
+##
+## Default 64
+##
+#gpu_mem=128
+
+## gpu_mem_256
+## GPU memory allocation in MB for 256MB board revision.
+## This option overrides gpu_mem.
+##
+#gpu_mem_256=128
+
+## gpu_mem_512
+## GPU memory allocation in MB for 512MB board revision.
+## This option overrides gpu_mem.
+##
+#gpu_mem_512=128
+
+################################################################################
+## Boot Option Settings
+################################################################################
+
+## disable_commandline_tags
+## Stop start.elf from filling in ATAGS (memory from 0x100) before
+## launching kernel
+##
+#disable_commandline_tags=0
+
+## cmdline (string)
+## Command line parameters. Can be used instead of cmdline.txt file
+##
+#cmdline=""
+
+## kernel (string)
+## Alternative name to use when loading kernel.
+##
+#kernel=""
+
+## kernel_address
+## Address to load kernel.img file at
+##
+#kernel_address=0x00000000
+
+## ramfsfile (string)
+## ramfs file to load
+##
+#ramfsfile=""
+
+## ramfsaddr
+## Address to load ramfs file at
+##
+#ramfsaddr=0x00000000
+
+## initramfs (string address)
+## ramfs file and address to load it at (it's like ramfsfile+ramfsaddr in
+## one option).
+##
+## NOTE: this option uses different syntax than all other options - you
+## should not use "=" character here.
+##
+#initramfs initramf.gz 0x00800000
+
+## device_tree_address
+## Address to load device_tree at
+##
+#device_tree_address=0x00000000
+
+## init_uart_baud
+## Initial uart baud rate.
+##
+## Default 115200
+##
+#init_uart_baud=115200
+
+## init_uart_clock
+## Initial uart clock.
+##
+## Default 3000000 (3MHz)
+##
+#init_uart_clock=3000000
+
+## init_emmc_clock
+## Initial emmc clock, increasing this can speedup your SD-card.
+##
+## Default 100000000 (100mhz)
+##
+#init_emmc_clock=100000000
+
+## boot_delay
+## Wait for a given number of seconds in start.elf before loading
+## kernel.img.
+##
+## delay = (1000 * boot_delay) + boot_delay_ms
+##
+## Default 1
+##
+#boot_delay=0
+
+## boot_delay_ms
+## Wait for a given number of milliseconds in start.elf before loading
+## kernel.img.
+##
+## delay = (1000 * boot_delay) + boot_delay_ms
+##
+## Default 0
+##
+#boot_delay_ms=0
+
+## avoid_safe_mode
+## Adding a jumper between pins 5 & 6 of P1 enables a recovery Safe Mode.
+## If pins 5 & 6 are used for connecting to external devices (e.g. GPIO),
+## then this setting can be used to ensure Safe Mode is not triggered.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Respect Safe Mode input (Default)
+## 1 Ignore Safe Mode input
+##
+#avoid_safe_mode=1
+
+################################################################################
+## Overclocking Settings
+##
+## ARM, SDRAM and GPU each have their own PLLs and can have unrelated
+## frequencies.
+##
+## The GPU core, h264, v3d and isp share a PLL, so need to have related
+## frequencies.
+## pll_freq = floor(2400 / (2 * core_freq)) * (2 * core_freq)
+## gpu_freq = pll_freq / [even number]
+##
+## The effective gpu_freq is automatically rounded to nearest even integer, so
+## asking for core_freq = 500 and gpu_freq = 300 will result in divisor of
+## 2000/300 = 6.666 => 6 and so 333.33MHz.
+##
+##
+## Standard Profiles:
+## arm_freq core_freq sdram_freq over_voltage
+## -------------------------------------------------------------------------
+## None 700 250 400 0
+## Modest 800 300 400 0
+## Medium 900 333 450 2
+## High 950 450 450 6
+## Turbo 1000 500 500 6
+##
+################################################################################
+
+## force_turbo
+## Control the kernel "ondemand" governor. It has no effect if no overclock
+## settings are specified.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Enable dynamic clocks and voltage for the ARM core, GPU core and
+## SDRAM (Default).
+## Overclocking of h264_freq, v3d_freq and isp_freq is ignored.
+## 1 Disable dynamic clocks and voltage for the ARM core, GPU core
+## and SDRAM.
+## Overclocking of h264_freq, v3d_freq and isp_freq is allowed.
+##
+#force_turbo=0
+
+## initial_turbo
+## Enables turbo mode from boot for the given value in seconds (up to 60)
+## or until cpufreq sets a frequency. Can help with sdcard corruption if
+## overclocked.
+##
+## Default 0
+##
+#initial_turbo=0
+
+## temp_limit
+## Overheat protection. Sets clocks and voltages to default when the SoC
+## reaches this Celsius value.
+## Setting this higher than default voids warranty.
+##
+## Default 85
+##
+#temp_limit=85
+
+## arm_freq
+## Frequency of ARM in MHz.
+##
+## Default 700.
+##
+#arm_freq=700
+
+## arm_freq_min
+## Minimum frequency of ARM in MHz (used for dynamic clocking).
+##
+## Default 700.
+##
+#arm_freq_min=700
+
+## gpu_freq
+## Sets core_freq, h264_freq, isp_freq, v3d_freq together.
+##
+## Default 250.
+##
+#gpu_freq=250
+
+## core_freq
+## Frequency of GPU processor core in MHz. It has an impact on ARM
+## performance since it drives L2 cache.
+##
+## Default 250.
+##
+#core_freq=250
+
+## core_freq_min
+## Minimum frequency of GPU processor core in MHz (used for dynamic
+## clocking). It has an impact on ARM performance since it drives L2 cache.
+##
+## Default 250.
+##
+#core_freq_min=250
+
+## h264_freq
+## Frequency of hardware video block in MHz.
+##
+## Default 250.
+##
+#h264_freq=250
+
+## isp_freq
+## Frequency of image sensor pipeline block in MHz.
+##
+## Default 250.
+##
+#isp_freq=250
+
+## v3d_freq
+## Frequency of 3D block in MHz.
+##
+## Default 250.
+##
+#v3d_freq=250
+
+## sdram_freq
+## Frequency of SDRAM in MHz.
+##
+## Default 400.
+##
+#sdram_freq=400
+
+## sdram_freq_min
+## Minimum frequency of SDRAM in MHz (used for dynamic clocking).
+##
+## Default 400.
+##
+#sdram_freq_min=400
+
+## avoid_pwm_pll
+## Unlink core_freq from the rest of the gpu. Analog audio should still
+## work, but from a fractional divider, so lower quality.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## 0 Linked core_freq (Default)
+## 1 Unlinked core_freq
+##
+#avoid_pwm_pll=1
+
+################################################################################
+## Voltage Settings
+################################################################################
+
+## current_limit_override
+## Disables SMPS current limit protection. Can help if you are currently
+## hitting a reboot failure when overclocking too high.
+##
+#current_limit_override=0x5A000020
+
+## over_voltage
+## ARM/GPU core voltage adjust.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## -16 0.8 V
+## -15 0.825 V
+## -14 0.85 V
+## -13 0.875 V
+## -12 0.9 V
+## -11 0.925 V
+## -10 0.95 V
+## -9 0.975 V
+## -8 1.0 V
+## -7 1.025 V
+## -6 1.05 V
+## -5 1.075 V
+## -4 1.1 V
+## -3 1.125 V
+## -2 1.15 V
+## -1 1.175 V
+## 0 1.2 V (Default)
+## 1 1.225 V
+## 2 1.25 V
+## 3 1.275 V
+## 4 1.3 V
+## 5 1.325 V
+## 6 1.35 V
+## 7 1.375 V (requires force_turbo=1)
+## 8 1.4 V (requires force_turbo=1)
+##
+#over_voltage=0
+
+## over_voltage_min
+## Minimum ARM/GPU core voltage adjust (used for dynamic clocking).
+##
+## Value Description
+## -------------------------------------------------------------------------
+## -16 0.8 V
+## -15 0.825 V
+## -14 0.85 V
+## -13 0.875 V
+## -12 0.9 V
+## -11 0.925 V
+## -10 0.95 V
+## -9 0.975 V
+## -8 1.0 V
+## -7 1.025 V
+## -6 1.05 V
+## -5 1.075 V
+## -4 1.1 V
+## -3 1.125 V
+## -2 1.15 V
+## -1 1.175 V
+## 0 1.2 V (Default)
+## 1 1.225 V
+## 2 1.25 V
+## 3 1.275 V
+## 4 1.3 V
+## 5 1.325 V
+## 6 1.35 V
+## 7 1.375 V (requires force_turbo=1)
+## 8 1.4 V (requires force_turbo=1)
+##
+#over_voltage_min=0
+
+## over_voltage_sdram
+## Sets over_voltage_sdram_c, over_voltage_sdram_i, over_voltage_sdram_p
+## together
+##
+## Value Description
+## -------------------------------------------------------------------------
+## -16 0.8 V
+## -15 0.825 V
+## -14 0.85 V
+## -13 0.875 V
+## -12 0.9 V
+## -11 0.925 V
+## -10 0.95 V
+## -9 0.975 V
+## -8 1.0 V
+## -7 1.025 V
+## -6 1.05 V
+## -5 1.075 V
+## -4 1.1 V
+## -3 1.125 V
+## -2 1.15 V
+## -1 1.175 V
+## 0 1.2 V (Default)
+## 1 1.225 V
+## 2 1.25 V
+## 3 1.275 V
+## 4 1.3 V
+## 5 1.325 V
+## 6 1.35 V
+## 7 1.375 V
+## 8 1.4 V
+##
+#over_voltage_sdram=0
+
+## over_voltage_sdram_c
+## SDRAM controller voltage adjust.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## -16 0.8 V
+## -15 0.825 V
+## -14 0.85 V
+## -13 0.875 V
+## -12 0.9 V
+## -11 0.925 V
+## -10 0.95 V
+## -9 0.975 V
+## -8 1.0 V
+## -7 1.025 V
+## -6 1.05 V
+## -5 1.075 V
+## -4 1.1 V
+## -3 1.125 V
+## -2 1.15 V
+## -1 1.175 V
+## 0 1.2 V (Default)
+## 1 1.225 V
+## 2 1.25 V
+## 3 1.275 V
+## 4 1.3 V
+## 5 1.325 V
+## 6 1.35 V
+## 7 1.375 V
+## 8 1.4 V
+##
+#over_voltage_sdram_c=0
+
+## over_voltage_sdram_i
+## SDRAM I/O voltage adjust.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## -16 0.8 V
+## -15 0.825 V
+## -14 0.85 V
+## -13 0.875 V
+## -12 0.9 V
+## -11 0.925 V
+## -10 0.95 V
+## -9 0.975 V
+## -8 1.0 V
+## -7 1.025 V
+## -6 1.05 V
+## -5 1.075 V
+## -4 1.1 V
+## -3 1.125 V
+## -2 1.15 V
+## -1 1.175 V
+## 0 1.2 V (Default)
+## 1 1.225 V
+## 2 1.25 V
+## 3 1.275 V
+## 4 1.3 V
+## 5 1.325 V
+## 6 1.35 V
+## 7 1.375 V
+## 8 1.4 V
+##
+#over_voltage_sdram_i=0
+
+## over_voltage_sdram_p
+## SDRAM phy voltage adjust.
+##
+## Value Description
+## -------------------------------------------------------------------------
+## -16 0.8 V
+## -15 0.825 V
+## -14 0.85 V
+## -13 0.875 V
+## -12 0.9 V
+## -11 0.925 V
+## -10 0.95 V
+## -9 0.975 V
+## -8 1.0 V
+## -7 1.025 V
+## -6 1.05 V
+## -5 1.075 V
+## -4 1.1 V
+## -3 1.125 V
+## -2 1.15 V
+## -1 1.175 V
+## 0 1.2 V (Default)
+## 1 1.225 V
+## 2 1.25 V
+## 3 1.275 V
+## 4 1.3 V
+## 5 1.325 V
+## 6 1.35 V
+## 7 1.375 V
+## 8 1.4 V
+##
+#over_voltage_sdram_p=0 \ No newline at end of file