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RTC

RTC设备驱动是一个标准的字符设备驱动。

1 rtc 驱动配置​

以主配置 x1600e_halley6_nand_factory_defconfig 为例

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kernel的配置为：

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或者通过如下命令：

build$ grep -nr "kernel" configs/x1600e_halley6_nand_factory_defconfig 
6:APP_kernel_dir=../kernel/kernel-x2000
7:APP_kernel_config=x1600_halley6_module_base_linux_sfc_nand_defconfig

可知kernel的配置为: x1600_halley6_module_base_linux_sfc_nand_defconfig

可知当前的kernel 编译路径为：kernel/kernel-x2000

1.1 选中 kernel 相关配置​

先使用主配置 x1600e_halley6_nand_factory_defconfig 整体编译以后，再执行如下操作。

执行如下命令，进入kernel的配置界面

kernel/kernel-x2000$ make menuconfig
Ingenic device-drivers Configurations → [RTC] drivers 
    
        <*> INGENIC RTC     
        [*]   Ingenic RTC suspend test                                        
        (60)    Ingenic RTC suspend alarm time Unit of second (NEW)       
        <*> INGENIC RTC V1

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保存配置退出，执行如下操作，让配置 x1600_halley6_module_base_linux_sfc_nand_defconfig生效。

kernel/kernel-x2000$ cp .config arch/mips/configs/x1600_halley6_module_base_linux_sfc_nand_defconfig -arf

1.2 kernel设备树相关配置​

执行如下命令，进入kernel的配置界面

make menuconfig 进入配置菜单
kernel/kernel-x2000$ make menuconfig

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或者通过如下命令：

kernel/kernel-x2000$ grep -nr ".dts" arch/mips/configs/x1600_halley6_module_base_linux_sfc_nand_defconfig 
70:CONFIG_DT_X1600_MODULE_BASE_DTS_FILE="x1600_halley6_module_base.dts"

搜索 x1600_halley6_module_base.dts 文件路径。

kernel/kernel-x2000$ find ./ -name "x1600_halley6_module_base.dts"
./arch/mips/boot/dts/ingenic/x1600_halley6_module_base.dts

可知文件路径：kernel/kernel-x2000$ ls arch/mips/boot/dts/ingenic/x1600_halley6_module_base.dts

打开文件 x1600_halley6_module_base.dts

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可知用到的文件为：x1600.dtsi ,确定文件路径如下：

kernel/kernel-x2000$ find ./ -name "x1600.dtsi"
./arch/mips/boot/dts/ingenic/x1600.dtsi
[2]+  Done                    gedit arch/mips/boot/dts/ingenic/x1600_halley6_module_base.dts
rtc: rtc@0x10003000 {
    compatible = "ingenic,rtc-x1600";
    reg = <0x10003000 0x4c>;
    interrupt-parent = <&core_intc>;
    interrupts = <IRQ_RTC>;
    system-power-controller;
    power-on-press-ms = <1000>;
    status = "ok";
    };

2 rtc 测试​

编译进入内核，进行休眠唤醒一段时间
echo mem > sys/power/state （休眠60秒后自动唤醒－（测试点为定时和计时准确以及唤醒功能））
# echo mem > /sys/power/state 
[   22.955409] PM: Syncing filesystems ... done.
[   22.960401] Freezing user space processes ... (elapsed 0.001 seconds) done.
[   22.962327] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[   22.963945] x1600 suspend begin
[   22.964165] Suspending console(s) (use no_console_suspend to debug)
CDWXRD00000004
1t00000003
B2345[   22.966490] -------suspend count = 0
[   22.966563] PM: suspend of devices complete after 1.669 msecs
[   22.966567] x1600 suspend prepare
[   22.967191] PM: late suspend of devices complete after 0.606 msecs
[   22.967681] PM: noirq suspend of devices complete after 0.470 msecs
[   22.967687] REG  |+++GPA++|+++GPB++|+++GPC++|+++GPD++|
[   22.967687] 
[   22.967687] INL  |0f9fd79d|d010073f|89540000|00000002|
[   22.967687] INT  |00000000|00000000|90000000|00000000|
[   22.967687] MSK  |cfffffff|c0027030|0b000007|0000003f|
[   22.967687] PAT1     |ffffffff|0003f030|9b000007|0000003f|
[   22.967687] PAT0     |00000000|dff80003|00000000|00000000|
[   22.967687] EDG  |00000000|00000000|90000000|00000000|
[   22.967687] PULL     |00000000|8000001f|077e0007|00000000|
[   22.967687] FLAG     |00000000|00000000|00000000|00000000|
[   22.967687] PA00:Inpt,High    PB00:Fun1,High    PC00:Inpt,Low     PD00:Inpt,Low     
[   22.967687] PA01:Inpt,Low     PB01:Fun1,High    PC01:Inpt,Low     PD01:Inpt,High    
[   22.967687] PA02:Inpt,High    PB02:Fun0,High    PC02:Inpt,Low     PD02:Inpt,Low     
[   22.967687] PA03:Inpt,High    PB03:Fun0,High    PC03:Fun0,Low     PD03:Inpt,Low     
[   22.967687] PA04:Inpt,High    PB04:Inpt,High    PC04:Fun0,Low     PD04:Inpt,Low     
    PB08:Fun0,High    PC08:Fun0,Low     PD08:Fun0,Low     
[   22.967687] PA09:Inpt,High    PB09:Fun0,High    PC09:Fun0,Low     PD09:Fun0,Low     
[   22.967687] PA10:Inpt,High    PB10:Fun0,High    PC10:Fun0,Low     PD10:Fun0,Low     
[   22.967687] PA11:Inpt,Low     PB11:Fun0,Low     PC11:Fun0,Low     PD11:Fun0,Low     
[   22.967687] PA12:Inpt,High    PB12:Inpt,Low     PC12:Fun0,Low     PD12:Fun0,Low     
[   22.967687] PA13:Inpt,Low     PB13:Inpt,Low     PC13:Fun0,Low     PD13:Fun0,Low     
[   22.967687] PA14:Inpt,High    PB14:Inpt,Low     PC14:Fun0,Low     PD14:Fun0,Low     
[   22.967687] PA15:Inpt,High    PB15:Fun2,Low     PC15:Fun0,Low     PD15:Fun0,Low     
[   22.967687] PA16:Inpt,High    PB16:Fun2,Low     PC16:Fun0,Low     PD16:Fun0,Low     
[   22.967687] PA17:Inpt,High    PB17:Inpt,Low     PC17:Fun0,Low     PD17:Fun0,Low     
[   22.967687] PA18:Inpt,High    PB18:Fun0,Low     PC18:Fun0,High    PD18:Fun0,Low     
D21:Fun0,Low     
[   22.967687] PA22:Inpt,Low     PB22:Fun1,Low     PC22:Fun0,High    PD22:Fun0,Low     
[   22.967687] PA23:Inpt,High    PB23:Fun1,Low     PC23:Fun0,Low     PD23:Fun0,Low     
[   22.967687] PA24:Inpt,High    PB24:Fun1,Low     PC24:Inpt,High    PD24:Fun0,Low     
[   22.967687] PA25:Inpt,High    PB25:Fun1,Low     PC25:Inpt,Low     PD25:Fun0,Low     
[   22.967687] PA26:Inpt,High    PB26:Fun1,Low     PC26:Fun0,High    PD26:Fun0,Low     
[   22.967687] PA27:Inpt,High    PB27:Fun1,Low     PC27:Inpt,High    PD27:Fun0,Low     
[   22.967687] PA28:Fun2,Low     PB28:Fun1,High    PC28:IntR,Low     PD28:Fun0,Low     
[   22.967687] PA29:Fun2,Low     PB29:Fun0,Low     PC29:Fun0,Low     PD29:Fun0,Low     
[   22.967687] PA30:Inpt,Low     PB30:Out1,High    PC30:Fun0,Low     PD30:Fun0,Low     
[   22.967687] PA31:Inpt,Low     PB31:Out1,High    PC31:IntR,High    PD31:Fun0,Low     
[   22.967687] REG  |+++GPA++|+++GPB++|+++GPC++|+++GPD++|
[   22.967687] 
[   22.967687] INL  |0f9fd79d|d010073f|89540000|00000002|
[   22.967687] INT  |00000000|00000000|90000000|00000000|
[   22.967687] MSK  |cfffffff|c0027030|0b000007|0000003f|
[   22.967687] PAT1     |ffffffff|0003f030|9b000007|0000003f|
[   22.967687] PAT0     |00000000|dff80003|00000000|00000000|
[   22.967687] EDG  |00000000|00000000|90000000|00000000|
[   22.967687] PULL     |00000000|8000001f|077e0007|00000000|
[   22.967687] FLAG     |00000000|00000000|00000000|00000000|
[   22.967687] PA00:Inpt,High    PB00:Fun1,High    PC00:Inpt,Low     PD00:Inpt,Low     
[   22.967687] PA01:Inpt,Low     PB01:Fun1,High    PC01:Inpt,Low     PD01:Inpt,High    
[   22.967687] PA02:Inpt,High    PB02:Fun0,High    PC02:Inpt,Low     PD02:Inpt,Low     
[   22.967687] PA03:Inpt,High    PB03:Fun0,High    PC03:Fun0,Low     PD03:Inpt,Low     
[   22.967687] PA04:Inpt,High    PB04:Inpt,High    PC04:Fun0,Low     PD04:Inpt,Low     
    PB08:Fun0,High    PC08:Fun0,Low     PD08:Fun0,Low     
[   22.967687] PA09:Inpt,High    PB09:Fun0,High    PC09:Fun0,Low     PD09:Fun0,Low     
[   22.967687] PA10:Inpt,High    PB10:Fun0,High    PC10:Fun0,Low     PD10:Fun0,Low     
[   22.967687] PA11:Inpt,Low     PB11:Fun0,Low     PC11:Fun0,Low     PD11:Fun0,Low     
[   22.967687] PA12:Inpt,High    PB12:Inpt,Low     PC12:Fun0,Low     PD12:Fun0,Low     
[   22.967687] PA13:Inpt,Low     PB13:Inpt,Low     PC13:Fun0,Low     PD13:Fun0,Low     
[   22.967687] PA14:Inpt,High    PB14:Inpt,Low     PC14:Fun0,Low     PD14:Fun0,Low     
[   22.967687] PA15:Inpt,High    PB15:Fun2,Low     PC15:Fun0,Low     PD15:Fun0,Low     
[   22.967687] PA16:Inpt,High    PB16:Fun2,Low     PC16:Fun0,Low     PD16:Fun0,Low     
[   22.967687] PA17:Inpt,High    PB17:Inpt,Low     PC17:Fun0,Low     PD17:Fun0,Low     
[   22.967687] PA18:Inpt,High    PB18:Fun0,Low     PC18:Fun0,High    PD18:Fun0,Low     
D21:Fun0,Low     
[   22.967687] PA22:Inpt,Low     PB22:Fun1,Low     PC22:Fun0,High    PD22:Fun0,Low     
[   22.967687] PA23:Inpt,High    PB23:Fun1,Low     PC23:Fun0,Low     PD23:Fun0,Low     
[   22.967687] PA24:Inpt,High    PB24:Fun1,Low     PC24:Inpt,High    PD24:Fun0,Low     
[   22.967687] PA25:Inpt,High    PB25:Fun1,Low     PC25:Inpt,Low     PD25:Fun0,Low     
[   22.967687] PA26:Inpt,High    PB26:Fun1,Low     PC26:Fun0,Low     PD26:Fun0,Low     
[   22.967687] PA27:Inpt,High    PB27:Fun1,Low     PC27:Inpt,High    PD27:Fun0,Low     
[   22.967687] PA28:Fun2,Low     PB28:Fun1,High    PC28:IntR,Low     PD28:Fun0,Low     
[   22.967687] PA29:Fun2,Low     PB29:Fun0,Low     PC29:Fun0,Low     PD29:Fun0,Low     
[   22.967687] PA30:Inpt,Low     PB30:Out1,High    PC30:Fun0,Low     PD30:Fun0,Low     
[   22.967687] PA31:Inpt,Low     PB31:Out1,High    PC31:IntR,High    PD31:Fun0,Low     
[   22.967687] x1600 pm enter!!
[   22.967687] sleep_param->state addr =  3
[   22.967687] tcsm addr = b3422000 80014c30 size = 64
[   22.967687] tcsm addr = b3422040 80014c74 size = 4096
[   22.967687] tcsm addr = b3423040 80015140 size = 3072
[   22.967687] pd core and l2c
[   22.967687] LCR: 00001f01
[   22.967687] OPCR: 4470152c
[   22.967687] gate0 = 0x43dab7f7
[   22.967687] gate1 = 0x33fffcdb
[   22.967687] warning : bit[3] in clk gate0 is enabled
[   22.967687] warning : bit[11] in clk gate0 is enabled
[   22.967687] warning : bit[14] in clk gate0 is enabled
[   22.967687] warning : bit[16] in clk gate0 is enabled
[   22.967687] warning : bit[18] in clk gate0 is enabled
[   22.967687] warning : bit[21] in clk gate0 is enabled
[   22.967687] warning : bit[26] in clk gate0 is enabled
[   22.967687] warning : bit[27] in clk gate0 is enabled
[   22.967687] warning : bit[28] in clk gate0 is enabled
[   22.967687] warning : bit[29] in clk gate0 is enabled
[   22.967687] warning : bit[31] in clk gate0 is enabled
[   22.967687] warning : bit[2] in clk gate1 is enabled
[   22.967687] warning : bit[5] in clk gate1 is enabled
[   22.967687] warning : bit[8] in clk gate1 is enabled
[   22.967687] warning : bit[9] in clk gate1 is enabled
[   22.967687] warning : bit[26] in clk gate1 is enabled
[   22.967687] warning : bit[27] in clk gate1 is enabled
[   22.967687] warning : bit[30] in clk gate1 is enabled
[   22.967687] warning : bit[31] in clk gate1 is enabled
[   22.967687] mem_pd0 = 0x3fb1007b
[   22.967687] mem_pd1 = 0x30
[   22.967687] intc0 mask = 0xffff7fef
[   22.967687] intc1 mask = 0xfffffffe
[   22.967687] post wakeup!
[   22.967687] -----------------
[   22.967687] WAKE UP by INTC1: bit[0] -> RTC
[   22.967687] -----------------
[   22.968208] PM: noirq resume of devices complete after 0.459 msecs
[   22.969789] PM: early resume of devices complete after 0.374 msecs
[   22.970339] x1600 suspend finishcreate CDT index: 0 ~ 22,  index number:23.
[   22.970943] PM: resume of devices complete after 1.131 msecs
[   23.018159] x1600 pm end irq_num=40!
[   23.018408] Restarting tasks ... done.
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