58 lines
2.2 KiB
Plaintext
58 lines
2.2 KiB
Plaintext
Qualcomm QPNP keypad controller
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The qpnp-keypad driver supports the PMIC keypad controller module
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in the Qualcomm PMICs. This controller supports 10 x 8 (row x col)
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configuration and is connected to the host processor on the
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SPMI interface.
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Required properties:
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- compatible: Must be "qcom,qpnp-keypad"
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- reg: Specifies the SPMI address and size for the keypad controller
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- interrupts: Specifies the interrupt associated with keypad controller
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- interrupt-names: The names of the 2 interrupts assocaited with the keypad
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controller. They are - "kp-sense" and "kp-stuck".
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- keypad,num-rows: Number of rows used in the keypad configuration. These
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rows are the number of PMIC gpios configured as drive
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lines. Possible values: Max = 10, Min = 2.
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- keypad,num-columns: Number of columns used in the keypad configuration. These
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cols are number of PMIC gpios configured as sense lines.
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Possible values: Max = 8, Min = 1.
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- linux,keymap: Row-column-keycode mapping. It is an array of packed
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entries containing the equivalent of row, column and
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linux key-code. Each value represented as
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(row << 24 | column << 16 | key-code)
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Optional Properties:
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- qcom,scan-delay-ms: Wait time in milliseconds before each keypad scan.
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This is used to determine if the key has been stuck.
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Possible values: 1, 2, 4, 8, 16, 32, 64, 128ms.
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- qcom,row-hold-ns: Wait time in nanoseconds between each row assertion.
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Configured based on last-row scan delay.
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Possible values: 31250, 62500, 125000, 250000ns.
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- qcom,debounce-ms: Wait time in milliseconds before the column data is
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sampled for key press detection.
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Possible values: 5, 10, 15, 20ms.
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- qcom,wakeup: Configure the keypad as a wakeup source. This is a
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boolean property.
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- linux,keypad-no-autorepeat:
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Disables the auto-repeat feature for the keys. This
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is a boolean property.
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Example:
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qcom,keypad@a800 {
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compatible = "qcom,qpnp-keypad";
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reg = <0xA800 0x100>;
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interrupts = <0x1 0xA8 0x0>,
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<0x1 0xA8 0x1>;
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interrupt-names = "kp-sense", "kp-stuck";
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keypad,num-rows = <2>;
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keypad,num-cols = <2>;
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qcom,scan-delay-ms = <128>;
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qcom,row-hold-ns = <31250>;
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qcom,debounce-ms = <20>;
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qcom,wakeup;
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linux,keymap = <0x00000001 0x00010002
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0x01000003 0x01010004>;
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}
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