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This patch adds the binding documentation for Spreadtrum SC9860 pin controller device. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
71 lines
2.1 KiB
Plaintext
71 lines
2.1 KiB
Plaintext
* Spreadtrum SC9860 Pin Controller
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Please refer to sprd,pinctrl.txt in this directory for common binding part
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and usage.
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Required properties:
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- compatible: Must be "sprd,sc9860-pinctrl".
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- reg: The register address of pin controller device.
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- pins : An array of strings, each string containing the name of a pin.
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Optional properties:
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- function: A string containing the name of the function, values must be
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one of: "func1", "func2", "func3" and "func4".
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- drive-strength: Drive strength in mA. Supported values: 2, 4, 6, 8, 10,
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12, 14, 16, 20, 21, 24, 25, 27, 29, 31 and 33.
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- input-schmitt-disable: Enable schmitt-trigger mode.
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- input-schmitt-enable: Disable schmitt-trigger mode.
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- bias-disable: Disable pin bias.
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- bias-pull-down: Pull down on pin.
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- bias-pull-up: Pull up on pin. Supported values: 20000 for pull-up resistor
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is 20K and 4700 for pull-up resistor is 4.7K.
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- input-enable: Enable pin input.
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- input-disable: Enable pin output.
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- output-high: Set the pin as an output level high.
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- output-low: Set the pin as an output level low.
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- sleep-hardware-state: Indicate these configs in this state are sleep related.
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- sprd,control: Control values referring to databook for global control pins.
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- sprd,sleep-mode: Choose the pin sleep mode, and supported values are:
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AP_SLEEP, PUBCP_SLEEP, TGLDSP_SLEEP and AGDSP_SLEEP.
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Pin sleep mode definition:
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enum pin_sleep_mode {
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AP_SLEEP = BIT(0),
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PUBCP_SLEEP = BIT(1),
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TGLDSP_SLEEP = BIT(2),
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AGDSP_SLEEP = BIT(3),
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};
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Example:
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pin_controller: pinctrl@402a0000 {
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compatible = "sprd,sc9860-pinctrl";
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reg = <0x402a0000 0x10000>;
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grp1: sd0 {
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pins = "SC9860_VIO_SD2_IRTE", "SC9860_VIO_SD0_IRTE";
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sprd,control = <0x1>;
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};
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grp2: rfctl_33 {
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pins = "SC9860_RFCTL33";
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function = "func2";
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sprd,sleep-mode = <AP_SLEEP | PUBCP_SLEEP>;
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grp2_sleep_mode: rfctl_33_sleep {
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pins = "SC9860_RFCTL33";
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sleep-hardware-state;
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output-low;
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}
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};
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grp3: rfctl_misc_20 {
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pins = "SC9860_RFCTL20_MISC";
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drive-strength = <10>;
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bias-pull-up = <4700>;
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grp3_sleep_mode: rfctl_misc_sleep {
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pins = "SC9860_RFCTL20_MISC";
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sleep-hardware-state;
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bias-pull-up;
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}
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};
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};
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