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/********************************************************************* * I.MX6 各模块 clock 查询 * 说明： * 今天在查资料的时候无意中发现了查看内核时钟频率的方法，这东西 * 我一直以为不能查，只能通过查看源代码来看。 * * 2016-8-1 深圳 南山平山村 曾剑锋 ********************************************************************/ 一、参考文档： How to use & access iMX6 peripherals (Examples) http://www.imx6rex.com/software/imx6-rex-basic-hw-verification-tests/#dump_clocks 二、参考代码： #!/system/bin/sh if ! mount|grep -sq ‘/sys/kernel/debug‘; then mount -t debugfs none /sys/kernel/debug fi saved_path=$PWD busybox printf "%-24s %-24s %3s %9s\n" "clock" "parent" "use" "rate" for foo in $(busybox find /sys/kernel/debug/clock -type d); do if [ "$foo" = ‘/sys/kernel/debug/clock‘ ]; then continue fi cd $foo use="$(cat usecount)" rate="$(cat rate)" clk="$(busybox basename $foo)" cd .. parent="$(busybox basename $PWD)" if [ "$parent" = ‘clock‘ ]; then parent=" ---" fi busybox printf "%-24s %-24s %2d %10d\n" "$clk" "$parent" "$use" "$rate" cd $saved_path done 三、输出结果： root@android:/data/local # ./clock.sh clock parent use rate ckih_clk --- 0 0 ckih2_clk --- 0 0 ckil_clk --- 0 32768 caam_mem_clk --- 0 0 anaclk_1 --- 0 0 anaclk_2 --- 0 0 osc_clk --- 6 24000000 pll6_mlb150_main_clk osc_clk 0 24000000 pll7_usb_host_main_clk osc_clk 0 480000000 pll1_sys_main_clk osc_clk 1 996000000 pll1_sw_clk pll1_sys_main_clk 1 996000000 cpu_clk pll1_sw_clk 1 996000000 twd_clk cpu_clk 0 498000000 pll5_video_main_clk osc_clk 1 266539998 ipu1_di_clk_0 pll5_video_main_clk 1 66634999 ipu1_di_clk_1 pll5_video_main_clk 0 88846666 ipu2_di_clk_0 pll5_video_main_clk 0 88846666 pll4_audio_main_clk osc_clk 0 175999998 asrc_clk pll4_audio_main_clk 0 175999998 gpt_clk osc_clk 1 3000000 pll8_enet_main_clk osc_clk 0 24000000 enet_clk pll8_enet_main_clk 0 50000000 sata_clk pll8_enet_main_clk 0 24000000 clko2_clk osc_clk 1 24000000 clko_clk clko2_clk 0 24000000 pll2_528_bus_main_clk osc_clk 1 528000000 pll2_pfd_352M pll2_528_bus_main_clk 0 452571428 ldb_di0_clk pll2_pfd_352M 0 64653061 ldb_di1_clk pll2_pfd_352M 0 64653061 pll2_pfd_594M pll2_528_bus_main_clk 0 528000000 gpu3d_core_clk pll2_pfd_594M 0 528000000 gpu3d_shader_clk pll2_pfd_594M 0 528000000 gpu2d_core_clk gpu3d_shader_clk 0 528000000 pll2_pfd_400M pll2_528_bus_main_clk 2 396000000 pll2_200M pll2_pfd_400M 0 198000000 mmdc_ch1_axi_clk pll2_pfd_400M 0 396000000 usdhc1_clk pll2_pfd_400M 0 198000000 usdhc2_clk pll2_pfd_400M 0 198000000 emi_clk pll2_pfd_400M 0 198000000 hsi_tx_clk pll2_pfd_400M 0 198000000 enfc_clk pll2_pfd_400M 0 19800000 gpmi_io_clk enfc_clk 0 19800000 usdhc4_clk pll2_pfd_400M 0 198000000 gpmi_bch_clk usdhc4_clk 0 198000000 usdhc3_clk pll2_pfd_400M 0 198000000 apbh_dma_clk usdhc3_clk 0 198000000 gpmi_apb_clk usdhc3_clk 0 198000000 gpmi_bch_apb_clk usdhc3_clk 0 198000000 ipu2_clk pll2_pfd_400M 0 198000000 periph_clk pll2_pfd_400M 3 396000000 ahb_clk periph_clk 4 132000000 sdma_clk ahb_clk 0 132000000 mx6per1_clk ahb_clk 1 132000000 pl301_mx6qperl_bch mx6per1_clk 0 132000000 ipg_clk ahb_clk 4 66000000 spba_clk ipg_clk 0 66000000 iim_clk ipg_clk 1 66000000 ipg_perclk ipg_clk 1 16500000 i2c_clk_0 ipg_perclk 0 16500000 i2c_clk_1 ipg_perclk 0 16500000 i2c_clk_2 ipg_perclk 0 16500000 pwm_clk_0 ipg_perclk 1 16500000 pwm_clk_1 ipg_perclk 0 16500000 pwm_clk_2 ipg_perclk 0 16500000 pwm_clk_3 ipg_perclk 0 16500000 usboh3_clk ahb_clk 1 132000000 hdmi_iahb_clk ahb_clk 0 132000000 aips_tz2_clk ahb_clk 0 132000000 aips_tz1_clk ahb_clk 0 132000000 mmdc_ch0_axi_clk periph_clk 2 396000000 gpu3d_axi_clk mmdc_ch0_axi_clk 0 396000000 gpu2d_axi_clk mmdc_ch0_axi_clk 0 396000000 openvg_axi_clk gpu2d_axi_clk 0 396000000 perfmon0_clk mmdc_ch0_axi_clk 0 396000000 perfmon2_clk mmdc_ch0_axi_clk 0 396000000 pll3_usb_otg_main_clk osc_clk 4 480000000 pll3_pfd_720M pll3_usb_otg_main_clk 0 720000000 pll3_pfd_508M pll3_usb_otg_main_clk 0 508235294 ssi1_clk pll3_pfd_508M 0 63529411 ssi2_clk pll3_pfd_508M 0 63529411 ssi3_clk pll3_pfd_508M 0 63529411 pll3_pfd_454M pll3_usb_otg_main_clk 0 454736842 spdif0_clk_0 pll3_pfd_454M 0 28421052 usb_phy1_clk pll3_usb_otg_main_clk 1 1010065408 usb_phy3_clk pll3_usb_otg_main_clk 0 1010065408 usb_phy4_clk pll3_usb_otg_main_clk 0 1010065408 pll3_sw_clk pll3_usb_otg_main_clk 1 480000000 pll3_120M pll3_sw_clk 0 120000000 esai_clk pll3_sw_clk 0 30000000 pll3_60M pll3_sw_clk 0 60000000 can_clk_root pll3_60M 0 30000000 can1_module_clk can_clk_root 0 30000000 can2_module_clk can_clk_root 0 30000000 ecspi0_clk pll3_60M 0 60000000 ecspi1_clk pll3_60M 0 60000000 ecspi2_clk pll3_60M 0 60000000 ecspi3_clk pll3_60M 0 60000000 ecspi4_clk pll3_60M 0 60000000 pll3_80M pll3_sw_clk 1 80000000 uart_clk pll3_80M 1 80000000 asrc_serial_clk pll3_sw_clk 0 7500000 mlb150_clk pll3_sw_clk 0 480000000 pll3_pfd_540M pll3_usb_otg_main_clk 3 270000000 hdmi_isfr_clk pll3_pfd_540M 0 270000000 mipi_pllref_clk pll3_pfd_540M 1 270000000 axi_clk pll3_pfd_540M 1 135000000 vpu_clk axi_clk 0 135000000 emi_slow_clk axi_clk 0 67500000 pcie_axi_clk axi_clk 0 135000000 pcie_clk pcie_axi_clk 0 135000000 vdo_axi_clk axi_clk 0 135000000 vdoa_clk vdo_axi_clk 0 135000000 ipu2_di_clk_1 pll3_pfd_540M 0 135000000 ipu1_clk pll3_pfd_540M 1 135000000 perfmon1_clk ipu1_clk 0 135000000 ipu1_pixel_clk_0 ipu1_clk 1 66634999 ipu1_pixel_clk_1 ipu1_clk 0 135000000 root@android:/data/local #
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原文地址：http://www.cnblogs.com/zengjfgit/p/5726160.html
