刚开始配置rk3188板子的时候，
基本配置，RK3188 RK616 ACT8846 8G的flash,
开机的时候提示如下：
<6>[ 18.729270] request_suspend_state: wakeup (0->0) at 18680347129 (1970-01-01 00:00:18.671397630 UTC)
<4>[ 23.810524] UMP: ERR: /home/xxm/project/mali_git/driver/src/devicedrv/ump/linux/ump_kernel_linux.c
<4>[ 23.810593] ump_file_open() 251
<4>[ 23.810634] Minor not zero in ump_file_open()
<4>[ 23.810662]
<4>[ 23.811502] UMP: ERR: /home/xxm/project/mali_git/driver/src/devicedrv/ump/linux/ump_kernel_linux.c
<4>[ 23.811564] ump_file_open() 251
<4>[ 23.811591] Minor not zero in ump_file_open()
<4>[ 23.811619]
<6>[ 23.990544] request_suspend_state: wakeup (0->0) at 23941622629 (1970-01-01 00:00:23.932673130 UTC)
<4>[ 29.040916] UMP: ERR: /home/xxm/project/mali_git/driver/src/devicedrv/ump/linux/ump_kernel_linux.c
<4>[ 29.040968] ump_file_open() 251
<4>[ 29.041005] Minor not zero in ump_file_open()
<4>[ 29.041025]
<4>[ 29.041583] UMP: ERR: /home/xxm/project/mali_git/driver/src/devicedrv/ump/linux/ump_kernel_linux.c
<4>[ 29.041627] ump_file_open() 251
<4>[ 29.041647] Minor not zero in ump_file_open()
<4>[ 29.041667]
<6>[ 29.201502] request_suspend_state: wakeup (0->0) at 29152579130 (1970-01-01 00:00:29.143630006 UTC)
然后RK那边让我们修改了ACT8846的VCCio
{
name = "act_ldo8", //vcc28_cif
.min_uv = 3300000,
.max_uv = 3300000,
},
硬件回复
因为我把DCDC4 设置成了主电压，然后很多IO口和供电都需要3.0V以上，系统就将PMU DCDC4 的电压设置了3.3V
