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rk30:phonepad:modify vdd_cpu(arm voltage) when resume

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张晴
2012-08-09 18:28:30 +08:00
parent 68e8ac6ea5
commit 8cbbc34b0b
1 changed files with 11 additions and 4 deletions
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15
arch/arm/mach-rk30/i2c_sram.c
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@@ -32,6 +32,7 @@ CH=2:(~(0x03<<24))&(~(0x03<<22))|(0x01<<24)|(0x01<<22),CH=3:(~(0x03<<26))&(~(0x0
#define uint16 unsigned short
#define uint32 unsigned int
uint32 __sramdata data[5];
uint8 __sramdata arm_voltage = 0;
#define CRU_CLKGATE0_CON 0xd0
#define CRU_CLKGATE8_CON 0xf0
@@ -308,7 +309,7 @@ void __sramfunc rk30_suspend_voltage_set(unsigned int vol)
data = 0x23; //set arm 1.0v
sram_i2c_init(); //init i2c device
// ret = sram_i2c_read(slaveaddr, slavereg);
arm_voltage = sram_i2c_read(slaveaddr, slavereg);
// sram_printhex(ret);
sram_i2c_write(slaveaddr, slavereg, data);//
sram_i2c_deinit(); //deinit i2c device
@@ -322,10 +323,16 @@ void __sramfunc rk30_suspend_voltage_resume(unsigned int vol)
uint8 data,ret;
slaveaddr = I2C_SADDR; //slave device addr
slavereg = 0x22; // reg addr
data = 0x2b;
sram_i2c_init(); //init i2c device
// ret = sram_i2c_read(slaveaddr, slavereg);
if (arm_voltage >= 0x3b ){ // set arm <= 1.3v
data = 0x3b;
}
else if(arm_voltage <= 0x1f){
data = 0x1f; // set arm >= 0.95v
}
else
data = arm_voltage;
sram_i2c_write(slaveaddr, slavereg, data);
sram_i2c_deinit(); //deinit i2c device
}