268 lines
11 KiB
Plaintext
268 lines
11 KiB
Plaintext
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QTI's LAB (LCD/AMOLED BOOST)/IBB (Inverting Buck-Boost) Regulator
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LAB can be used as a standalone positive boost power supply for general purpose
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applications. IBB can be used as a standalone negative power supply for general
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applications. Also, LAB and IBB can be used together to provide power supply for
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display panels, LCD or AMOLED.
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Main node required properties:
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- compatible: Must be "qcom,qpnp-labibb-regulator"
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- spmi-dev-container: Must be present.
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- qpnp,qpnp-labibb-mode: A string used to specify the working mode of LAB/IBB
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regulators when bootloader does not turned on the
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display panel. Could be "lcd", "amoled" or
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"stand-alone".
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"lcd" means using LAB and IBB regulators are
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configured for LCD mode together.
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"amoled" means using LAB and IBB regulators are
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configured for AMOLED mode together.
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"stand-alone" means using LAB and IBB regulators
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as stand alone regulators.
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Main node optional properties:
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- qcom,qpnp-labibb-touch-to-wake-en: A boolean property which upon set will
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enable support for touch-to-wake mode
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by configuring the required settings
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in LAB and IBB modules. Make sure the
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hardware has needed support before
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enabling this property.
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- qpnp,swire-control: A bool property which indicates if the LAB/IBB is
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controlled by the SWIRE interface. Enable only
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if qpnp,qpnp-labibb-mode = "amoled".
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LAB subnode required properties:
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- reg: Specifies the SPMI address and size for this peripheral.
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- reg-names: Register names. Must be "lab".
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- regulator-name: A string used to describe the regulator.
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- regulator-min-microvolt: Minimum voltage in microvolts supported by this regulator.
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- regulator-max-microvolt: Maximum voltage in microvolts supported by this regulator.
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- qcom,qpnp-lab-min-voltage: The minimum voltage in microvolts LAB regulator can support.
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- qcom,qpnp-lab-step-size: The step size in microvolts of LAB regulator.
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- qcom,qpnp-lab-slew-rate: The time in us taken by the regulator to change
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voltage value in one step.
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- qcom,qpnp-lab-init-voltage: The default initial voltage when the bootloader
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does not turn on LAB regulator.
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- qcom,qpnp-lab-init-amoled-voltage: The default output voltage when LAB regulator
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is configured in amoled mode.
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- qcom,qpnp-lab-init-lcd-voltage: The default output voltage when LAB regulator
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is configured in lcd mode.
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- qcom,qpnp-lab-soft-start: The soft start time in us of LAB regulator.
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Supported value are 200, 400, 600 and 800.
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- qcom,qpnp-lab-ps-threshold: The threshold in mA of Pulse Skip Mode for
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LAB regulator. Supported values are 20, 30,
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40 and 50.
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- qcom,qpnp-lab-pfet-size: PFET size in percentage. Supported values
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are 25, 50, 75 and 100.
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- qcom,qpnp-lab-nfet-size: NFET size in percentage. Supported values
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are 25, 50, 75 and 100.
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- qcom,qpnp-lab-max-precharge-time: Precharge time in us of LAB regulator.
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Supported values are 200, 300, 400 and 500.
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- qcom,qpnp-lab-switching-clock-frequency: The PWM switching clock frequency in
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kHz of Lab regulator, Supported values
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are: 3200, 2740, 2400, 2130, 1920,
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1750, 1600, 1480, 1370, 1280, 1200,
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1130, 1070, 1010, 960, 910.
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- qcom,qpnp-lab-limit-maximum-current: The maximum inductor current limit in
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mA of LAB regulator. Supported values
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are 200, 400, 600 and 800.
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LAB subnode optional properties:
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- qpnp,qpnp-lab-current-sense: If this property is specified, the LAB current
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sense gain will be programmed for LAB regulator.
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Otherwise, LAB current sense gain will be
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default to "1x". A string is used to specify the
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LAB current sense gain. Could be "0.5x" or "1x"
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or "1.5x" or "2x". For e.g. "0.5x" means current
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sense gain is 0.5.
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- qcom,qpnp-lab-ps-enable: A boolean proerty which upon set will enable
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pulse skip mode for LAB regulator. Otherwise,
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it is disabled.
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- qcom,qpnp-lab-full-pull-down: A boolean property which upon set will enable
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the pull down strength of LAB regulator to
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full. Otherwise, the pull down strength is
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configured to half.
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- qcom,qpnp-lab-pull-down-enable: A boolean property which upon set will enable
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the pull down for LAB regulator. Otherwise,
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it is disabled.
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- qcom,qpnp-lab-max-precharge-enable: A boolean property which upon set will
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enable fast precharge. Otherwise, it is
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disabled.
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- qcom,qpnp-lab-ring-suppression-enable: A boolean property which upon set will
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enable ring suppression for LAB
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regulator. Otherwise, it is disabled.
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- qcom,qpnp-lab-limit-max-current-enable: A boolean property which upon set will
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enforce maximum inductor current constraint
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for LAB regulator. Otherwise, there is no
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maximum current constraint.
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- qcom,qpnp-lab-use-default-voltage: A boolean property which upon set will
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use the value specified in
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qcom,qpnp-lab-init-voltage property.
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This will be used only if the bootloader
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doesn't configure the output voltage
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already. If it it not specified, then
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output voltage can be configured to
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any value in the allowed limit.
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IBB subnode required properties:
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- reg: Specifies the SPMI address and size for this peripheral.
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- reg-names: Register names. Must be "ibb".
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- regulator-name: A string used to describe the regulator.
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- regulator-min-microvolt: Minimum voltage in microvolts supported by this regulator.
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- regulator-max-microvolt: Maximum voltage in microvolts supported by this regulator.
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- qcom,qpnp-ibb-min-voltage: The minimum voltage in microvolts IBB regulator can support.
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- qcom,qpnp-ibb-step-size: The step size in microvolts of IBB regulator.
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- qcom,qpnp-ibb-slew-rate: The time in us taken by the regulator to change
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voltage value in one step.
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- qcom,qpnp-ibb-soft-start: The soft start time in us of IBB regulator.
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- qcom,qpnp-ibb-init-voltage: The default initial voltage when the bootloader does
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not turn on IBB regulator.
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- qcom,qpnp-ibb-init-amoled-voltage: The default output voltage when IBB regulator
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is configured in amoled mode.
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- qcom,qpnp-ibb-init-lcd-voltage: The default output voltage when IBB regulator
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is configured in lcd mode.
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- qcom,qpnp-ibb-discharge-resistor: The discharge resistor in Kilo Ohms which
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controls the soft start time. Supported values
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are 300, 64, 32 and 16.
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- qcom,qpnp-ibb-lab-pwrup-delay: Power up delay (in us) for IBB regulator when
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it is enabled or turned on. Supported values
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are 1000, 2000, 4000 and 8000.
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- qcom,qpnp-ibb-lab-pwrdn-delay: Power down delay (in us) for IBB regulator
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when it is disabled or turned off. Supported
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values are 1000, 2000, 4000 and 8000.
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- qcom,qpnp-ibb-switching-clock-frequency: The PWM switching clock frequency in
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kHz of IBB regulator. Supported values
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are: 3200, 2740, 2400, 2130, 1920,
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1750, 1600, 1480, 1370, 1280, 1200,
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1130, 1070, 1010, 960, 910.
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- qcom,qpnp-ibb-limit-maximum-current: The maximum inductor current limit in
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mA of IBB regulator. Supported values
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are: 0, 50, 100, 150, 200, 250, 300,
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350, 400, 450, 500, 550, 600, 650, 700,
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750, 800, 850, 900, 950, 1000, 1050,
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1100, 1150, 1200, 1250, 1300, 1350,
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1400, 1450, 1500 and 1550.
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- qcom,qpnp-ibb-debounce-cycle: The debounce cycle of IBB regulator.
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Supported values are 8, 16, 32 and 64.
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IBB subnode optional properties:
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- qcom,qpnp-ibb-ps-enable: A boolean property which upon set will enable
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pulse skip mode for IBB regulator. Otherwise,
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it is disabled.
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- qcom,qpnp-ibb-full-pull-down: A boolean property which upon set will enable
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the pull down strength of IBB regulator to
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full. Otherwise, the pull down strength is
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configured to half.
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- qcom,qpnp-ibb-pull-down-enable: A boolean property which upon set will enable
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the pull down for IBB regulator. Otherwise,
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it is disabled.
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- qcom,qpnp-ibb-en-discharge: A boolean property which upon set will
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enable discharge for IBB regulator.
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Otherwise, it is kept disabled.
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- qcom,qpnp-ibb-ring-suppression-enable: A boolean property which upon set will
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enable ring suppression for IBB
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regulator. Otherwise, it is disabled.
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- qcom,qpnp-ibb-limit-max-current-enable: A boolean property which upon set will
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enforce maximum inductor current constraint
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for IBB regulator. Otherwise, there is no
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maximum current constraint.
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- qcom,qpnp-ibb-use-default-voltage: A boolean property which upon set will
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use the value specified in
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qcom,qpnp-ibb-init-voltage property.
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This will be used only if the bootloader
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doesn't configure the output voltage
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already. If it it not specified, then
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output voltage can be configured to
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any value in the allowed limit.
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- qcom,output-voltage-one-pulse The expected voltage (in mV) of VDISN signal
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on the first SWIRE pulse. This property
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can be specified only if 'qpnp,swire-control'
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is defined. The minimum and maximum values
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are 1400mV and 7700mV.
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Example:
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qcom,pmi8994@3 {
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qpnp-labibb-regulator {
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spmi-dev-container;
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compatible = "qcom,qpnp-labibb-regulator";
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#address-cells = <1>;
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#size-cells = <1>;
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qpnp,qpnp-labibb-mode = "lcd";
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lab_regulator: qcom,lab@de00 {
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reg = <0xde00 0x100>;
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reg-names = "lab";
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regulator-name = "lab_reg";
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regulator-min-microvolt = <4600000>;
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regulator-max-microvolt = <6000000>;
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qcom,qpnp-lab-min-voltage = <4600000>;
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qcom,qpnp-lab-step-size = <100000>;
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qcom,qpnp-lab-slew-rate = <5000>;
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qcom,qpnp-lab-use-default-voltage;
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qcom,qpnp-lab-init-voltage = <5500000>;
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qcom,qpnp-lab-init-amoled-voltage = <4600000>;
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qcom,qpnp-lab-init-lcd-voltage = <5500000>;
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qcom,qpnp-lab-soft-start = <400>;
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qcom,qpnp-lab-full-pull-down;
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qcom,qpnp-lab-pull-down-enable;
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qcom,qpnp-lab-switching-clock-frequency = <1600>;
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qcom,qpnp-lab-limit-maximum-current = <800>;
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qcom,qpnp-lab-limit-max-current-enable;
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qcom,qpnp-lab-ps-threshold = <40>;
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qcom,qpnp-lab-ps-enable;
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qcom,qpnp-lab-nfet-size = <100>;
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qcom,qpnp-lab-pfet-size = <100>;
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qcom,qpnp-lab-max-precharge-time = <200>;
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};
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ibb_regulator: qcom,ibb@dc00 {
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reg = <0xdc00 0x100>;
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reg-names = "ibb_reg";
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regulator-name = "ibb_reg";
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regulator-min-microvolt = <4600000>;
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regulator-max-microvolt = <6000000>;
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qcom,qpnp-ibb-min-voltage = <1400000>;
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qcom,qpnp-ibb-step-size = <100000>;
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qcom,qpnp-ibb-slew-rate = <2000000>;
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qcom,qpnp-ibb-use-default-voltage;
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qcom,qpnp-ibb-init-voltage = <5500000>;
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qcom,qpnp-ibb-init-amoled-voltage = <4000000>;
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qcom,qpnp-ibb-init-lcd-voltage = <5500000>;
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qcom,qpnp-ibb-soft-start = <400>;
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qcom,qpnp-ibb-discharge-resistor = <300>;
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qcom,qpnp-ibb-lab-pwrup-delay = <8000>;
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qcom,qpnp-ibb-lab-pwrdn-delay = <8000>;
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qcom,qpnp-ibb-en-discharge;
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qcom,qpnp-ibb-full-pull-down;
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qcom,qpnp-ibb-pull-down-enable;
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qcom,qpnp-ibb-switching-clock-frequency = <1480>;
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qcom,qpnp-ibb-limit-maximum-current = <1550>;
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qcom,qpnp-ibb-debounce-cycle = <16>;
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qcom,qpnp-ibb-limit-max-current-enable;
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qcom,qpnp-ibb-ps-enable;
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};
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};
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};
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