本文主要是介绍msm8909耳机孔状态标记，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
添加msm8909
添加耳机线是否插入的标记，用于上层读写，cat /sys/module/msm8916_wcd_irq/parameters/msm8x16_line_status 为1表示接入 0表示未接
Index: android/kernel/msm-3.18/sound/soc/codecs/msm8916-wcd-irq.c
===================================================================
--- android/kernel/msm-3.18/sound/soc/codecs/msm8916-wcd-irq.c
+++ android/kernel/msm-3.18/sound/soc/codecs/msm8916-wcd-irq.c
@@ -36,7 +36,8 @@#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)static irqreturn_t wcd9xxx_spmi_irq_handler(int linux_irq, void *data);
-
+static unsigned int msm8x16_line_status = 0;
+module_param(msm8x16_line_status, uint, S_IRUGO | S_IWUSR);char *irq_names[MAX_NUM_IRQS] = {"spk_cnp_int","spk_clip_int",
@@ -105,6 +106,8 @@snd_soc_update_bits(map.codec,MSM8X16_WCD_A_DIGITAL_INT_EN_SET,(0x01 << irq), (0x01 << irq));
+ if (irq == 6)
+ msm8x16_line_status = 1;}if ((irq > 7) && (irq <= 15)) {snd_soc_update_bits(map.codec,
@@ -134,6 +137,8 @@snd_soc_update_bits(map.codec,MSM8X16_WCD_A_DIGITAL_INT_EN_CLR,(0x01 << irq), (0x01 << irq));
+ if (irq == 6)
+ msm8x16_line_status = 0;}if ((irq > 7) && (irq <= 15)) {
应用层检测方法：
FILE *fp_line_status;
char line_status = 0;
int temp = 0;
char cmd_line_status[64] = {"cat /sys/module/msm8916_wcd_irq/parameters/msm8x16_line_status"};
char tmpBuff[64];fp_line_status=popen(cmd_line_status, "r");if(fp_line_status == NULL){if (!params)sleep(30);elsesleep(params->duration);}else {while(1) {if(fgets(tmpBuff, 64, fp_line_status)!=NULL){//temp = sscanf(tmpBuff,"%d\n",&val);printf("%s %d zhongyukang tmpBuff %d %d\n",__func__,__LINE__,tmpBuff[0],tmpBuff[1]);if(tmpBuff[0] == '0'){pclose(fp_line_status);break;}sleep(1);memset(tmpBuff,0,sizeof(tmpBuff));pclose(fp_line_status);fp_line_status=popen(cmd_line_status, "r");}else printf("%s %d else zhongyukang tmpBuff %d %d\n",__func__,__LINE__);}}pclose(fp_line_status);
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