diff options
| author | Ivan Vecera <ivecera@redhat.com> | 2026-02-05 16:43:49 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-02-06 20:44:20 -0800 |
| commit | 24e4336a87f5c51263535201218889b5f324511f (patch) | |
| tree | 3579f67cf1d3a2c0ba01c77580c22cd79dae5897 /drivers/dpll/zl3073x/core.h | |
| parent | a14d9317904559a6948946de05bf9fb6f2a34fba (diff) | |
dpll: zl3073x: Add output pin frequency helper
Introduce zl3073x_dev_output_pin_freq_get() helper function to compute
the output pin frequency based on synthesizer frequency, output divisor,
and signal format. For N-div signal formats, the N-pin frequency is
additionally divided by esync_n_period.
Add zl3073x_out_is_ndiv() helper to check if an output is configured
in N-div mode (2_NDIV or 2_NDIV_INV signal formats).
Refactor zl3073x_dpll_output_pin_frequency_get() callback to use the
new helper, reducing code duplication and enabling reuse of the
frequency calculation logic in other contexts.
This is a preparatory change for adding current frequency to the
supported frequencies list in pin properties.
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Link: https://patch.msgid.link/20260205154350.3180465-2-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/dpll/zl3073x/core.h')
| -rw-r--r-- | drivers/dpll/zl3073x/core.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/dpll/zl3073x/core.h b/drivers/dpll/zl3073x/core.h index 09bca2d0926d..dddfcacea5c0 100644 --- a/drivers/dpll/zl3073x/core.h +++ b/drivers/dpll/zl3073x/core.h @@ -302,6 +302,36 @@ u8 zl3073x_dev_out_dpll_get(struct zl3073x_dev *zldev, u8 index) } /** + * zl3073x_dev_output_pin_freq_get - get output pin frequency + * @zldev: pointer to zl3073x device + * @id: output pin id + * + * Computes the output pin frequency based on the synth frequency, output + * divisor, and signal format. For N-div formats, N-pin frequency is + * additionally divided by esync_n_period. + * + * Return: frequency of the given output pin in Hz + */ +static inline u32 +zl3073x_dev_output_pin_freq_get(struct zl3073x_dev *zldev, u8 id) +{ + const struct zl3073x_synth *synth; + const struct zl3073x_out *out; + u8 out_id; + u32 freq; + + out_id = zl3073x_output_pin_out_get(id); + out = zl3073x_out_state_get(zldev, out_id); + synth = zl3073x_synth_state_get(zldev, zl3073x_out_synth_get(out)); + freq = zl3073x_synth_freq_get(synth) / out->div; + + if (zl3073x_out_is_ndiv(out) && zl3073x_is_n_pin(id)) + freq /= out->esync_n_period; + + return freq; +} + +/** * zl3073x_dev_out_is_diff - check if the given output is differential * @zldev: pointer to zl3073x device * @index: output index |