msm8953终端设备SD卡不识别系统把SD做成长供电

msm8953

SD卡不识别 插卡日志

console:/ # dmesg console:/ # cat /proc/kmsg [ 122.791973] mmc1: sdhci_msm_execute_tuning: no tuning point found [ 122.792069] mmc1: tuning execution failed: -5 <3>[ 122.791973] mmc1: sdhci_msm_execute_tuning: no tuning point found <3>[ 122.792069] mmc1: tuning execution failed: -5 [ 123.029692] mmc1: sdhci_msm_execute_tuning: no tuning point found [ 123.029749] mmc1: tuning execution failed: -5 <3>[ 123.029692] mmc1: sdhci_msm_execute_tuning: no tuning point found <3>[ 123.029749] mmc1: tuning execution failed: -5 [ 123.554364] mmc1: sdhci_msm_execute_tuning: no tuning point found [ 123.554464] mmc1: tuning execution failed: -5 <3>[ 123.554364] mmc1: sdhci_msm_execute_tuning: no tuning point found <3>[ 123.554464] mmc1: tuning execution failed: -5 [ 123.820137] mmc1: sdhci_msm_execute_tuning: no tuning point found [ 123.820232] mmc1: tuning execution failed: -5 <3>[ 123.820137] mmc1: sdhci_msm_execute_tuning: no tuning point found <3>[ 123.820232] mmc1: tuning execution failed: -5 [ 124.057573] mmc1: sdhci_msm_execute_tuning: no tuning point found [ 124.057622] mmc1: tuning execution failed: -5 [ 124.125102] mmc1: mmc_sd_init_card() failure (err = -5) [ 124.125183] mmc1: error -5 whilst initialising SD card <3>[ 124.125183] mmc1: error -5 whilst initialising SD card

kernelmsm-4.9archarm64ootdtsqcommsm8953-mtp.dtsi 文件下加一个 &sdhc_2 { /* device core power supply */ vdd-supply = <&pm8953_l11>; qcom,vdd-voltage-level = <2950000 2950000>; qcom,vdd-current-level = <15000 800000>; + qcom,vdd-always-on; /* ==========加入一行代码给SD卡长供电====== */ /* device communication power supply */ vdd-io-supply = <&pm8953_l12>; qcom,vdd-io-voltage-level = <1800000 2950000>; qcom,vdd-io-current-level = <200 22000>;

pinctrl-names = "active", "sleep"; pinctrl-0 = <&sdc2_clk_on &sdc2_cmd_on &sdc2_data_on &sdc2_cd_on>; pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off>;

重新刷新，SD卡可正常识别，说明硬件有问题，后面交给硬件工程师