clk: imx: Add audio PLL debugfs for K-divider control

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Add debugfs support for runtime tuning of the audio PLL K divider,
which enables fine-grained frequency adjustments for audio PLL.
This is used for:
  - Audio clock calibration and testing
  - Debugging audio synchronization issues

Two debug interfaces are exported to userspace:
  - delta_k: It is used to adjust the K divider in PLL based on small
    steps
  - pll_parameter: It is used for get PLL's current M-divider,
    P-divider, S-divider & K-divider setting in PLL register

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Link: https://patch.msgid.link/20260604-imx8m_pll_debugfs-v3-1-4e331ebc85d7@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>

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Jacky Bai 2026-06-04 21:48:01 +08:00 • committed by Abel Vesa

parent dc59e4fea9

commit 468238ced6

3 changed files with 125 additions and 1 deletions

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6

drivers/clk/imx/clk-imx8mm.c

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119

drivers/clk/imx/clk-pll14xx.c

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1

drivers/clk/imx/clk.h

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