| Message ID | 20181118135024.30720-1-narmstrong@baylibre.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add Amlogic Meson GX SoC Clock Measure Driver | expand |
On Sun, Nov 18, 2018 at 2:51 PM Neil Armstrong <narmstrong@baylibre.com> wrote: > > The Amlogic Meson GX SoCs embeds a clock measurer IP to measure the internal > clocks frequencies. > The precision is determined by stepping into the duration until the counter > overflows. > The debugfs shows a pretty summary and each clock can be measured > individually aswell. > > This patchset includes the dt-bindings, driver and the DT node added to the > meson-gx dtsi. > > Changes since v2 at [2]: > - Removed all reference to GX > - Added compatibles for meson8/meson8b > - Used Martin's suggestions on the divider naming > - Added Martin's meson8/meson8b clk id table > - Added Martin's fixes to support 32bit SoCs thank you for the updates Neil! here's the output from Odroid-C1: # cat /sys/kernel/debug/meson-clk-msr/measure_summary clock rate precision --------------------------------------------- ring_osc_out_ee0 0 +/-3125Hz ring_osc_out_ee1 0 +/-3125Hz ring_osc_out_ee2 0 +/-3125Hz a9_ring_osck 0 +/-3125Hz vid_pll 148497596 +/-4807Hz clk81 159372396 +/-5208Hz encp 148497596 +/-4807Hz encl 0 +/-3125Hz eth_rmii 125000000 +/-3906Hz amclk 0 +/-3125Hz fec_clk_0 0 +/-3125Hz fec_clk_1 0 +/-3125Hz fec_clk_2 0 +/-3125Hz a9_clk_div16 74998438 +/-3125Hz hdmi_sys 0 +/-3125Hz rtc_osc_clk_out 32813 +/-3125Hz i2s_clk_in_src0 0 +/-3125Hz clk_rmii_from_pad 0 +/-3125Hz hdmi_ch0_tmds 74248438 +/-3125Hz lvds_fifo 0 +/-3125Hz sc_clk_int 0 +/-3125Hz sar_adc 1140625 +/-3125Hz mpll_clk_test_out 0 +/-3125Hz audac_clkpi 0 +/-3125Hz vdac 0 +/-3125Hz sdhc_rx 0 +/-3125Hz sdhc_sd 0 +/-3125Hz mali 0 +/-3125Hz hdmi_tx_pixel 74250000 +/-3125Hz vdin_meas 0 +/-3125Hz pcm_sclk 0 +/-3125Hz pcm_mclk 0 +/-3125Hz eth_rx_tx 0 +/-3125Hz pwm_d 0 +/-3125Hz pwm_c 24000000 +/-3125Hz pwm_b 0 +/-3125Hz pwm_a 0 +/-3125Hz pcm2_sclk 0 +/-3125Hz ddr_dpll_pt 0 +/-3125Hz pwm_f 0 +/-3125Hz pwm_e 0 +/-3125Hz hcodec 0 +/-3125Hz usb_32k_alt 0 +/-3125Hz gpio 0 +/-3125Hz vid2_pll 0 +/-3125Hz mipi_csi_cfg 0 +/-3125Hz
Neil Armstrong <narmstrong@baylibre.com> writes: > The Amlogic Meson GX SoCs embeds a clock measurer IP to measure the internal > clocks frequencies. > The precision is determined by stepping into the duration until the counter > overflows. > The debugfs shows a pretty summary and each clock can be measured > individually aswell. > > This patchset includes the dt-bindings, driver and the DT node added to the > meson-gx dtsi. Queued for v4.21... [...] > Neil Armstrong (3): > dt-bindings: amlogic: Add Internal Clock Measurer bindings > soc: amlogic: Add Meson Clock Measure driver ...on branch v4.21/drivers and... > ARM64: dts: meson-gx: Add Internal Clock Measurer node ...on branch v4.21/dt64, Thanks, Kevin