rk2928:a713:support act8931 dc detection

diff --git a/arch/arm/mach-rk2928/i2c_sram.c b/arch/arm/mach-rk2928/i2c_sram.c
index f93a20cfe5ad7b516498eb8cdcf97691ed9347fb..11c64771952d52f8e8ee0b06b41842114826fd20 100755 (executable)
--- a/arch/arm/mach-rk2928/i2c_sram.c
+++ b/arch/arm/mach-rk2928/i2c_sram.c
@@ -349,6 +349,23 @@ void __sramfunc rk30_suspend_voltage_resume(unsigned int vol)
     sram_i2c_write(slaveaddr, slavereg, data);
     sram_i2c_deinit();  //deinit i2c device
 }
+
+int __sramfunc act8931_dc_det(unsigned int vol)
+{
+       uint8 slaveaddr;
+       uint16 slavereg;
+       uint8 ret = 0;
+       int data = 0;
+       slaveaddr = 0x5b;            //slave device addr
+       slavereg = 0x78;            // reg addr  
+       
+       sram_i2c_init();  //init i2c device
+       ret = sram_i2c_read(slaveaddr,slavereg);
+       data = (ret & (1<<1) )? 1:0;
+       sram_i2c_deinit();  //deinit i2c device
+       return data;
+}
+
 #else
 void __sramfunc rk30_suspend_voltage_set(unsigned int vol)
 {
@@ -357,6 +374,10 @@ void __sramfunc rk30_suspend_voltage_set(unsigned int vol)
 void __sramfunc rk30_suspend_voltage_resume(unsigned int vol)
 {
    
+}
+int __sramfunc act8931_dc_det(unsigned int vol)
+{
+       return -1;
 }
 #endif