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90 lines
3.5 KiB
90 lines
3.5 KiB
10 years ago
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Platform device for Host Based Touch Processing (HBTP)
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hbtp_input is a kernel driver that provides functionality needed by
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Host Based Touch Processing (HBTP) from the kernel. One of the
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functionality is to manage the power source for touch Analog Front
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End (AFE).
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Required properties:
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- compatible : should be "qcom,hbtp-input"
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Optional properties:
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- vcc_ana-supply : Analog power supply needed to power device
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- qcom,afe-load : AFE/Analog supply load in uA
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- qcom,afe-vtg-min : AFE/Analog minimum voltage in uV
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- qcom,afe-vtg-max : AFE/Analog maximum voltage in uV
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- qcom,dig-load : Digital supply load in uA
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- qcom,dig-vtg-min : Digital supply minimum voltage in uV
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- qcom,dig-vtg-max : Digital supply maximum voltage in uV
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- qcom,display-resolution : Display resolution - maxX, maxY
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- qcom,use-scale : boolean, enables the scaling for touch coordinates
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- pinctrl-names : defines pinctrl names
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"pmx_ts_active" : Required pinctrl name.
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This should specify active config of TS RST gpio
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"pmx_ts_suspend" : Required pinctrl name
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This should specify suspend config of TS RST gpio
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"ddic_rst_active" : Required pinctrl name
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This should specify active config of DDIC RST gpio
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"ddic_rst_suspend" : Required pinctrl name
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This should specify suspend config of DDIC RST gpio
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- pinctrl-0 : pin control to be used for TS active config
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- pinctrl-1 : pin control to be used for TS suspend config
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- pinctrl-2 : pin control to be used for DDIC active config
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- pinctrl-3 : pin control to be used for DDIC suspend config
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Optional properties if qcom,use-scale DT property is defined:
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- qcom,def-maxx : default X-resolution of the touch panel.
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- qcom,def-maxy : default Y-resolution of the touch panel.
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(Above two properties should be defined in pairs only)
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- qcom,des-maxx : desired X-resolution of the touch panel.
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- qcom,des-maxy : desired Y-resolution of the touch panel.
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(Above two properties should be defined in pairs only)
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Optional Properties if pinctrl names are defined:
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- qcom,pmx-ts-on-seq-delay-us : unsigned integer type for
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delay after active TS RST gpio is changed
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- qcom,fb-resume-delay-us : unsigned integer type for
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delay in early resume framebuffer callback
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- qcom,ddic-rst-on-seq-delay-us : array of unsigned integer type for
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delay of each step in series of DDIC RST gpio control
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Optional Properties if qcom,afe-vtg and qcom,dig-vtg are defined
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- qcom,afe-power-on-delay-us : unsigned integer type for
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delay between turning on analog and digital power supply
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- qcom,afe-power-off-delay-us : unsigned integer type for
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delay between turning off digital and analog power supply
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Example:
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&soc {
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hbtp {
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compatible = "qcom,hbtp-input";
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vcc_ana-supply = <&pm8941_l17>;
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vcc_dig-supply = <&pm8950_l16>;
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qcom,afe-load = <50000>;
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qcom,afe-vtg-min = <2850000>;
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qcom,afe-vtg-max = <2850000>;
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qcom,dig-load = <15000>;
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qcom,dig-vtg-min = <1800000>;
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qcom,dig-vtg-max = <1800000>;
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qcom,display-resolution = <719 1279>;
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qcom,use-scale;
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qcom,default-max-x = <1080>;
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qcom,default-max-y = <1920>;
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qcom,desired-max-x = <720>;
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qcom,desired-max-y = <1280>;
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pinctrl-names = "pmx_ts_active","pmx_ts_suspend",
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"ddic_rst_active", "ddic_rst_suspend";
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pinctrl-0 = <&ts_rst_active>;
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pinctrl-1 = <&ts_rst_suspend>;
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pinctrl-2 = <&ddic_rst_active>;
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pinctrl-3 = <&ddic_rst_suspend>;
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qcom,pmx-ts-on-seq-delay-us = <1000>;
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qcom,ddic-rst-on-seq-delay-us = <10000 10000 10000 10000>;
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qcom,fb-resume-delay-us = <90000>;
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qcom,afe-power-on-delay-us = <1000>;
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qcom,afe-power-off-delay-us = <6>;
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};
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};
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