[PATCH net-next v9 12/14] dpll: zl3073x: Implement input pin state setting in automatic mode
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From: Ivan Vecera <ivecera@redhat.com>
Date: 2025-06-12 20:03:28
Also in:
linux-devicetree, linux-doc, lkml
Subsystem:
dpll subsystem, microchip zl3073x driver, the rest · Maintainers:
Vadim Fedorenko, Arkadiusz Kubalewski, Jiri Pirko, Ivan Vecera, Min Li, Linus Torvalds
Revision v9 of 6 in this series.
Revisions (6)
Implement input pin state setting when the DPLL is running in automatic mode. Unlike manual mode, the DPLL mode switching is not used here and the implementation uses special priority value (15) to make the given pin non-selectable. When the user sets state of the pin as disconnected the driver internally sets its priority in HW to 15 that prevents the DPLL to choose this input pin. Conversely, if the pin status is set to selectable, the driver sets the pin priority in HW to the original saved value. Signed-off-by: Ivan Vecera <ivecera@redhat.com> --- drivers/dpll/zl3073x/dpll.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/drivers/dpll/zl3073x/dpll.c b/drivers/dpll/zl3073x/dpll.c
index e731b17c69394..1f44910958781 100644
--- a/drivers/dpll/zl3073x/dpll.c
+++ b/drivers/dpll/zl3073x/dpll.c@@ -439,6 +439,38 @@ zl3073x_dpll_input_pin_state_on_dpll_set(const struct dpll_pin *dpll_pin, rc = zl3073x_dpll_selected_ref_set(zldpll, new_ref); break; + + case ZL_DPLL_MODE_REFSEL_MODE_AUTO: + if (state == DPLL_PIN_STATE_SELECTABLE) { + if (pin->selectable) + return 0; /* Pin is already selectable */ + + /* Restore pin priority in HW */ + rc = zl3073x_dpll_ref_prio_set(pin, pin->prio); + if (rc) + return rc; + + /* Mark pin as selectable */ + pin->selectable = true; + } else if (state == DPLL_PIN_STATE_DISCONNECTED) { + if (!pin->selectable) + return 0; /* Pin is already disconnected */ + + /* Set pin priority to none in HW */ + rc = zl3073x_dpll_ref_prio_set(pin, + ZL_DPLL_REF_PRIO_NONE); + if (rc) + return rc; + + /* Mark pin as non-selectable */ + pin->selectable = false; + } else { + NL_SET_ERR_MSG(extack, + "Invalid pin state for automatic mode"); + return -EINVAL; + } + break; + default: /* In other modes we cannot change input reference */ NL_SET_ERR_MSG(extack,
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2.49.0