Android7.1非标充电修改

最新推荐文章于 2024-04-26 22:03:18 发布

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最新推荐文章于 2024-04-26 22:03:18 发布 · 1.1k 阅读

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#驱动程序 #安卓

本文介绍了Android 7.1系统中针对非标准充电的修改，涉及kernel和设备树配置，如添加qcom,detect-dpdm-floating属性和qcom,override-usb-current属性。详细解析了USB设备插入后的中断处理，充电类型识别及电流限制处理流程，包括dwc3_otg_sm_work函数中的状态切换和dwc3_check_float_lines函数的浮点检测，确保非标充电时设置正确电流。" 132821779,19687622,OpenCL编程：创建测试程序,"['编程', 'OpenCL', '并行计算', '服务器', 'Linux']

一、代码修改

diff --git a/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd-sku3.dtsi b/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd-sku3.dtsi

index 8de5830..94a517c 100755

--- a/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd-sku3.dtsi

+++ b/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd-sku3.dtsi

@@ -209,3 +209,7 @@

&wcd_rst_gpio {

status = "disabled";

};

+&usb3 {

+ qcom,detect-dpdm-floating;

+};

diff --git a/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd.dtsi b/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd.dtsi

index 12b9502..676b124 100755

--- a/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd.dtsi

+++ b/kernel/msm-3.18/arch/arm/boot/dts/qcom/msm8953-qrd.dtsi

@@ -174,6 +174,7 @@

qcom,chg-led-support;

qcom,external-typec;

qcom,typec-psy-name = "typec";

+ qcom,override-usb-current;

qcom,thermal-mitigation = <3000 2500 2000 1500 1000 500 0>;

status = "okay";

};

diff --git a/kernel/msm-3.18/drivers/usb/dwc3/dwc3-msm.c b/kernel/msm-3.18/drivers/usb/dwc3/dwc3-msm.c

index d0520b9..67c5f94 100755

--- a/kernel/msm-3.18/drivers/usb/dwc3/dwc3-msm.c

+++ b/kernel/msm-3.18/drivers/usb/dwc3/dwc3-msm.c

@@ -3471,6 +3471,7 @@ static void dwc3_check_float_lines(struct dwc3_msm *mdwc)

mdwc->chg_type = DWC3_PROPRIETARY_CHARGER;

mdwc->otg_state = OTG_STATE_B_IDLE;

pm_runtime_put_sync(mdwc->dev);

+ dwc3_msm_gadget_vbus_draw(mdwc, 2000);

dbg_event(0xFF, "FLT psync",

atomic_read(&mdwc->dev->power.usage_count));

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