501在全志r16平台tinav3.0系統下調通pwm1的10KHZ波形
2018/10/19 19:52
版本：V1.0
開發闆：SC3817R
SDK：tina v3.0
1、01原始編譯全志r16平台tinav3.0系統：
[email protected]:~$ cd /home/wwt
[email protected]:/home/wwt$
[email protected]:~$ cd /home/wwt
[email protected]:/home/wwt$
[email protected]:/home/wwt$
[email protected]:/home/wwt$ md5sum tina_v3.0_20180606_1711git.tar.gz
ebf7ea460473f13a7f64248ed61cf998 tina_v3.0_20180606_1711git.tar.gz
[email protected]:/home/wwt$
[email protected]:/home/wwt$ tar zxvf tina_v3.0_20180606_1711git.tar.gz
[email protected]:/home/wwt$
[email protected]:/home/wwt$ cd tina_v3.0/
[email protected]:/home/wwt/tina_v3.0$
[email protected]:/home/wwt/tina_v3.0$
[email protected]:/home/wwt/tina_v3.0$ source build/envsetup.sh
（請嚴重注意：lunch之後的選項是環境依賴的，請選擇astar_parrot-tina前的實際數值！）
[email protected]:/home/wwt/tina_v3.0$ lunch
You're building on Linux
Lunch menu... pick a combo:
5. astar_parrot-tina
Which would you like?5
[email protected]:/home/wwt/tina_v3.0$ make -j12
[email protected]:/home/wwt/tina_v3.0$ pack -d
2、在核心中打開PWM：
（已經預設選中了）
[email protected]:/home/wwt/tina_v3.0$ make kernel_menuconfig
Device Drivers --->
[*] Pulse-Width Modulation (PWM) Support --->
--- Pulse-Width Modulation (PWM) Support
<*> sunxi pwm support
相關驅動檔案在這裡：
W:\tina_v3.0\lichee\linux-3.4\drivers\pwm\core.c
W:\tina_v3.0\lichee\linux-3.4\drivers\pwm\pwm-sunxi.c
刷機之後可見，沒有輸出PWM波形的驅動！
[email protected]:/#
[email protected]:/# find . -name pwm*
./sys/kernel/debug/pwm
[email protected]:/#
[email protected]:/sys/kernel/debug#
[email protected]:/sys/kernel/debug# ll
drwxr-xr-x 24 root root 0 Jan 1 08:00 .
drwxr-xr-x 9 root root 0 Jan 1 08:29 ..
drwxr-xr-x 3 root root 0 Jan 1 08:00 asoc
drwxr-xr-x 2 root root 0 Jan 1 08:29 axpdbg
drwxr-xr-x 16 root root 0 Jan 1 08:00 bdi
drwxr-xr-x 2 root root 0 Jan 1 08:00 bluetooth
drwxr-xr-x 2 root root 0 Jan 1 08:29 ccudbg
drwxr-xr-x 6 root root 0 Jan 1 08:29 clk
drwxr-xr-x 2 root root 0 Jan 1 08:29 cpufreq
drwxr-xr-x 2 root root 0 Jan 1 08:29 ddrfreq
drwxr-xr-x 2 root root 0 Jan 1 08:00 extfrag
-r--r--r-- 1 root root 0 Jan 1 08:00 gpio
drwxr-xr-x 2 root root 0 Jan 1 08:00 hid
drwxr-xr-x 2 root root 0 Jan 1 08:00 hotplug
drwxr-xr-x 2 root root 0 Jan 1 08:00 ieee80211
drwxr-xr-x 2 root root 0 Jan 1 08:00 ion
drwxr-xr-x 8 root root 0 Jan 1 08:29 mali
drwxr-xr-x 2 root root 0 Jan 1 08:00 memblock
drwxr-xr-x 2 root root 0 Jan 1 08:00 mmc0
drwxr-xr-x 4 root root 0 Jan 1 08:00 pinctrl
-r--r--r-- 1 root root 0 Jan 1 08:00 pwm
drwxr-xr-x 2 root root 0 Jan 1 08:00 regmap
drwxr-xr-x 23 root root 0 Jan 1 08:00 regulator
-rw-r--r-- 1 root root 0 Jan 1 08:00 shrinker
drwxr-xr-x 2 root root 0 Jan 1 08:00 sunxi_pinctrl
drwxr-xr-x 2 root root 0 Jan 1 08:00 sunxi_soc_info
-r--r--r-- 1 root root 0 Jan 1 08:00 suspend_stats
-rwxr-xr-x 1 root root 0 Jan 1 08:00 suspend_time
-r--r--r-- 1 root root 0 Jan 1 08:00 sync
drwxr-xr-x 2 root root 0 Jan 1 08:00 usb
-r--r--r-- 1 root root 0 Jan 1 08:00 wakeup_sources
[email protected]:/sys/kernel/debug#
[email protected]:/sys/kernel/debug#
（可見）
[email protected]:/sys/kernel/debug#
[email protected]:/sys/kernel/debug# cat pwm
platform/sunxi_pwm, 2 PWM devices
pwm-0 ((null) ):
pwm-1 (lcd ): requested enabled
[email protected]:/sys/kernel/debug#
（tina v3.0.2中内置：）
W:\tina_v3.0\lichee\linux-3.4\drivers\misc\leds\Kconfig
W:\tina_v3.0\lichee\linux-3.4\drivers\misc\leds\Makefile
W:\tina_v3.0\lichee\linux-3.4\drivers\misc\leds\pwm_leds.c
W:\tina_v3.0\lichee\linux-3.4\drivers\misc\Makefile
obj-y += leds/
W:\tina_v3.0\lichee\linux-3.4\drivers\misc\Kconfig
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
source "drivers/misc/iwmc3200top/Kconfig"
source "drivers/misc/ti-st/Kconfig"
source "drivers/misc/lis3lv02d/Kconfig"
source "drivers/misc/carma/Kconfig"
source "drivers/misc/altera-stapl/Kconfig"
source "drivers/misc/sw_3g_module/Kconfig"
source "drivers/misc/rf_pm/Kconfig"
source "drivers/misc/sunxi-clk-prepare/Kconfig"
source "drivers/misc/leds/Kconfig"
endmenu
[email protected]:/home/wwt/tina_v3.0$ make kernel_menuconfig
Device Drivers --->
Misc devices --->
（在最後面，預設選中的）
<M> LEDs by PWM Control driver (NEW)
[email protected]:/home/wwt/tina_v3.0$ make -j12
STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (SPI) (SENSORS_LIS3_SPI) [N/m/y/?] n
STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (I2C) (SENSORS_LIS3_I2C) [N/m/y/?] n
*
* Altera FPGA firmware download module
*
Altera FPGA firmware download module (ALTERA_STAPL) [N/m/y/?] n
Allwinner rf module pm driver (AW_RF_PM) [Y/n/?] y
LEDs by PWM Control driver (MISC_PWM_LEDS) [M/n/y/?] (NEW) y
刷機之後可見：
（通過ADB可見PWM1打開了）
[email protected]:/# cd /sys/class/sunxi_dump
cd /sys/class/sunxi_dump
[email protected]:/sys/class/sunxi_dump#
[email protected]:/sys/class/sunxi_dump# ll
ll
drwxr-xr-x 2 root root 0 Jan 1 08:29 .
drwxr-xr-x 48 root root 0 Jan 1 08:29 ..
-rw-r--r-- 1 root root 4096 Jan 1 08:29 compare
-rw-r--r-- 1 root root 4096 Jan 1 08:29 dump
-rw-r--r-- 1 root root 4096 Jan 1 08:29 write
[email protected]:/sys/class/sunxi_dump#
[email protected]:/sys/class/sunxi_dump#
[email protected]:/sys/class/sunxi_dump# echo 0x01C208FC > dump;cat dump
echo 0x01C208FC > dump;cat dump
0x77222227
[email protected]:/#
[email protected]:/# find . -name pwm*
./sys/devices/virtual/misc/misc_dev/pwm_leds
./sys/kernel/debug/pwm
[email protected]:/#
[email protected]:/# cd /sys/kernel/debug
[email protected]:/sys/kernel/debug# cat pwm
platform/sunxi_pwm, 2 PWM devices
pwm-0 (led_red ): requested
pwm-1 (led_blue ): requested enabled
[email protected]:/sys/kernel/debug#
[email protected]:/#
[email protected]:/# cd /sys/devices/virtual/misc/misc_dev/pwm_leds
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# ll
drwxr-xr-x 2 root root 0 Jan 1 08:30 .
drwxr-xr-x 4 root root 0 Jan 1 08:29 ..
-rw-rw-r-- 1 root root 4096 Jan 1 08:30 blue_func
-rw-rw-r-- 1 root root 4096 Jan 1 08:30 red_func
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func
[ 367.939811] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func
9
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
1預設值為9頻率416.7HZ
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 0 > blue_func
[ 387.486088] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func
[ 387.498988] pwm_id = 1,>>>function = 0+++
[ 387.505686] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm
[ 387.523484] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm
[ 387.529991] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func
[ 505.578676] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
配置值為0頻率10KHZ最暗
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 1 > blue_func
[ 512.697534] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func
[ 512.709935] pwm_id = 1,>>>function = 1+++
[ 512.716597] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm
[ 512.726517] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm
[ 512.735989] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func
[ 578.443656] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func
1
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
配置值為1頻率10KHZ中等亮度
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 2 > blue_func [ 607.022921] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func
[ 607.037085] pwm_id = 1,>>>function = 2+++
[ 607.043501] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm
[ 607.053190] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm
[ 607.064587] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 2 > blue_func
[ 662.857794] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func
[ 662.870006] pwm_id = 1,>>>function = 2+++
[ 662.877317] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm
[ 662.890735] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm
[ 662.898948] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func
[ 674.138688] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func
2
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
配置為值為2頻率10KHZ最高亮度：
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds#
（有興趣的可以看看：）
[email protected]:/sys/devices/virtual/misc/misc_dev/pwm_leds# cd ..
[email protected]:/sys/devices/virtual/misc/misc_dev#
[email protected]:/sys/devices/virtual/misc/misc_dev#
[email protected]:/sys/devices/virtual/misc/misc_dev# ll
drwxr-xr-x 4 root root 0 Jan 1 08:29 .
drwxr-xr-x 22 root root 0 Jan 1 08:29 ..
-r--r--r-- 1 root root 4096 Jan 1 08:29 dev
drwxr-xr-x 2 root root 0 Jan 1 08:30 power
drwxr-xr-x 2 root root 0 Jan 1 08:30 pwm_leds
lrwxrwxrwx 1 root root 0 Jan 1 08:30 subsystem -> ../../../../class/misc
-rw-r--r-- 1 root root 4096 Jan 1 08:29 uevent
[email protected]:/sys/devices/virtual/misc/misc_dev#