【WaRP7试用体验】9.WaRP7开发板上待机功能分析和bc3770电池分析

手机

warp7定位为IOT设备，相对其他嵌入式设备手机和pda等电源管理尤为重要，毕竟IOT的设备体积要求更小，电池容量自然更小。我们将从待机功能的理论，调试手段，源代码实现逻辑和实际电流测试数值，还有系统运行log几个方面来分析一下。

待机功能理论
Linux电源管理_Generic PowerManager涉及的内容非常多，我们这里只是对我们要使用的待机功能实现逻辑进入分析，其他部分的内容暂时认为是黑盒即可。
任何一个版本的linux kernel都有一些相关文档待机功能也不另外。Documentation/power/state.txt就是待机功能的说明文档，相对比较简单。
简单总结如下表，但是需要注意的是这些状态是所有的状态的概括，尤其对于嵌入式设备它未必都支持，例如我们的warp7就支持三种。cat /sys/power/state 输出：freeze standby mem
操作接口 ACPI state:S0 ACPI state:S1 ACPI state:S3 ACPI state:S4
/sys/power/state Suspend-To-Idle Standby / Power-On Suspend Suspend-to-RAM Suspend-to-disk
freeze standby mem disk
调试方法
理论说完我们来看看调试的方法。printk是linux kernel开发中最佳的调试手段，但是suspend和resume时默认是关闭的，需要手动打开。将bool console_suspend_enabled变量设置为false，然后重新编译内核，则printk函数打印信息就可以输出到串口中。
1. static int fxos8700_suspend(struct device *dev)
2. {
3. struct i2c_client *client = to_i2c_client(dev);
4. struct fxos8700_data *pdata = i2c_get_clientdata(client);
5. printk("fxos8700_suspendn");
6. if (atomic_read(&pdata->acc_active) || atomic_read(&pdata->mag_active))
7. fxos8700_device_stop(client);
8. return 0;
9. }
11. static int fxos8700_resume(struct device *dev)
12. {
13. int ret = 0;
14. struct i2c_client *client = to_i2c_client(dev);
15. struct fxos8700_data *pdata = i2c_get_clientdata(client);
16. printk("fxos8700_resumen");
17. if (atomic_read(&pdata->acc_active))
18. fxos8700_change_mode(client, FXOS8700_TYPE_ACC, FXOS8700_ACTIVED);
19. if (atomic_read(&pdata->mag_active))
20. fxos8700_change_mode(client, FXOS8700_TYPE_MAG, FXOS8700_ACTIVED);
21. return ret;
22. }
复制代码
源代码实现逻辑
a./sys/power/state操作接口初始化
文件：kernel/kernel/power/main.c
入口函数：core_initcall(pm_init);core_init的加载顺序需要注意要比一般的驱动要早。
kobject_create_and_add创建设备节点，sysfs_create_group创建设备节点下面的子设备节点。attr_group里面包含很多设备节点，比较源代码和下面设备节点的名字和个数是一一对应。
b.echo mem > /sys/power/state处理逻辑
echo mem > /sys/power/state-->state_store函数-->1.decode_state函数判断系统状态；2.pm_suspend才是关键处理逻辑-->pm_suspend函数-->enter_state函数-->
1.sys_sync函数；缓存同步
2.suspend_prepare函数；冻结所以进程，（fasync_helper，控制台子系统和freeze用户空间进程和一些内核线程）
3.suspend_devices_and_enter函数；调用每个设备驱动suspend函数
c.cat /sys/power/state处理逻辑
cat /sys/power/state -->state_show函数，即pm_states数组所以数值显示出来。
pm_states数组，有一组默认初始化数值：const char *pm_labels[] = { "mem", "standby", "freeze", NULL };
对于每个嵌入式平台来说，都有一些自己的处理逻辑，arch/arm/mach-imx/pm-imax7.c中imx7_pm_valid函数，代码非常简单。
static int imx7_pm_valid(suspend_state_t state)

{

printk("imx7_pm_validn");

return state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM;

}
复制代码
c.其他PM core等函数这里就不在涉及。
各种不同状态待机测试电流数值，值得注意的是standby的待机电流小于mem时的待机电流，后面找到设备确认一下测试结果正确性。不同的测试设备待机电流很可能不一样，但是总的趋势是一致的。

操作命令 mem待机电流 standby待机电流 freeze待机电流
echo xxx>/sys/power/state 71.3mA 50mA 92mA
系统运行log
1. U-Boot 2016.07+fslc+ge6b4241 (Aug 19 2017 - 03:19:53 +0800)
3. CPU: Freescale i.MX7S rev1.2 at 792MHz
4. CPU: Extended Commercial temperature grade (-20C to 105C) at 42C
5. Reset cause: POR
6. Board: WARP7
7. DRAM: 512 MiB
8. MMC: FSL_SDHC: 0
9. *** Warning - bad CRC, using default environment
11. In: serial
12. Out: serial
13. Err: serial
14. Net: CPU Net Initialization Failed
15. No ethernet found.
16. Hit any key to stop autoboot: 0
17. switch to partitions #0, OK
18. mmc0(part 0) is current device
19. switch to partitions #0, OK
20. mmc0(part 0) is current device
21. reading boot.scr
22. ** Unable to read file boot.scr **
23. reading zImage
24. 6270656 bytes read in 94 ms (63.6 MiB/s)
25. Booting from mmc ...
26. reading imx7s-warp.dtb
27. 37585 bytes read in 12 ms (3 MiB/s)
28. Kernel image @ 0x80800000 [ 0x000000 - 0x5faec0 ]
29. ## Flattened Device Tree blob at 83000000
30. Booting using the fdt blob at 0x83000000
31. Using Device Tree in place at 83000000, end 8300c2d0
33. Starting kernel ...
35. Booting Linux on physical CPU 0x0
36. Linux version 4.1.32-4.1-1.0.x-imx-warp7+g511f37a (gaozh@T430) (gcc version 5.3.0 (GCC) ) #2 SMP PREEMPT Wed Sep 13 22:27:17 CST 2017
37. CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c53c7d
38. CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
39. Machine model: Warp i.MX7S Board
40. Reserved memory: created CMA memory pool at 0x8c000000, size 320 MiB
41. Reserved memory: initialized node linux,cma, compatible id shared-dma-pool
42. Memory policy: Data cache writealloc
43. PERCPU: Embedded 12 pages/cpu @8bb23000 s16908 r8192 d24052 u49152
44. Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
45. Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk2p2 rootwait rw
46. PID hash table entries: 2048 (order: 1, 8192 bytes)
47. Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
48. Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
49. Memory: 179216K/524288K available (7816K kernel code, 455K rwdata, 2788K rodata, 424K init, 473K bss, 17392K reserved, 327680K cma-reserved, 0K highmem)
50. Virtual kernel memory layout:
51. vector : 0xffff0000 - 0xffff1000 ( 4 kB)
52. fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
53. vmalloc : 0xa0800000 - 0xff000000 (1512 MB)
54. lowmem : 0x80000000 - 0xa0000000 ( 512 MB)
55. pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)
56. modules : 0x7f000000 - 0x7fe00000 ( 14 MB)
57. .text : 0x80008000 - 0x80a6349c (10606 kB)
58. .init : 0x80a64000 - 0x80ace000 ( 424 kB)
59. .data : 0x80ace000 - 0x80b3ffe0 ( 456 kB)
60. .bss : 0x80b42000 - 0x80bb8640 ( 474 kB)
61. SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
62. Preemptible hierarchical RCU implementation.
63. Additional per-CPU info printed with stalls.
64. RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
65. RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
66. NR_IRQS:16 nr_irqs:16 16
67. Architected cp15 timer(s) running at 8.00MHz (phys).
68. clocksource arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1d854df40, max_idle_ns: 440795202120 ns
69. sched_clock: 56 bits at 8MHz, resolution 125ns, wraps every 2199023255500ns
70. Switching to timer-based delay loop, resolution 125ns
71. mxc_clocksource_init 3000000
72. Ignoring duplicate/late registration of read_current_timer delay
73. clocksource mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 637086815595 ns
74. Console: colour dummy device 80x30
75. Calibrating delay loop (skipped), value calculated using timer frequency.. 16.00 BogoMIPS (lpj=80000)
76. pid_max: default: 32768 minimum: 301
77. Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
78. Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
79. CPU: Testing write buffer coherency: ok
80. /cpus/cpu@0 missing clock-frequency property
81. /cpus/cpu@1 missing clock-frequency property
82. CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
83. Setting up static identity map for 0x80008280 - 0x800082d8
84. CPU1: failed to come online
85. Brought up 1 CPUs
86. SMP: Total of 1 processors activated (16.00 BogoMIPS).
87. CPU: All CPU(s) started in SVC mode.
88. devtmpfs: initialized
89. device-tree: Duplicate name in lcdif@30730000, renamed to "display#1"
90. VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
91. =2=CONFIG_PM_TRACE=1=CONFIG_PM_SLEEP=2=CONFIG_PM_AUTOSLEEP=2=CONFIG_PM_WAKELOCKS=1=CONFIG_PM_DEBUG=1=CONFIG_PM_SLEEP_DEBUG=1=CONFIG_FREEZER
92. clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
93. pinctrl core: initialized pinctrl subsystem
94. NET: Registered protocol family 16
95. DMA: preallocated 256 KiB pool for atomic coherent allocations
96. cpuidle: using governor ladder
97. cpuidle: using governor menu
98. DDR type is LPDDR3!
99. imx7_pm_valid
100. pm_states[i]=memimx7_pm_valid
101. pm_states[i]=standby
102. hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
103. hw-breakpoint: maximum watchpoint size is 8 bytes.
104. imx7d-pinctrl 302c0000.iomuxc-lpsr: initialized IMX pinctrl driver
105. imx7d-pinctrl 30330000.iomuxc: initialized IMX pinctrl driver
106. gpio-reset mipi-dsi-reset: reset-gpios property missing, or not a single gpio
107. gpio-reset: probe of mipi-dsi-reset failed with error -22
108. MU is ready for cross core communication!
109. mxs-dma 33000000.dma-apbh: initialized
110. SCSI subsystem initialized
111. u***core: registered new interface driver u***fs
112. u***core: registered new interface driver hub
113. u***core: registered new device driver u***
114. 30800000.aips-bus:u***phy_nop1 supply vcc not found, using dummy regulator
115. 30800000.aips-bus:u***phy_nop2 supply vcc not found, using dummy regulator
116. i2c i2c-0: IMX I2C adapter registered
117. i2c i2c-0: can't use DMA
118. i2c i2c-1: IMX I2C adapter registered
119. i2c i2c-1: can't use DMA
120. i2c i2c-2: IMX I2C adapter registered
121. i2c i2c-2: can't use DMA
122. i2c i2c-3: IMX I2C adapter registered
123. i2c i2c-3: can't use DMA
124. Linux video capture interface: v2.00
125. pps_core: LinuxPPS API ver. 1 registered
126. pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti
127. PTP clock support registered
128. MIPI CSI2 driver module loaded
129. Advanced Linux Sound Architecture Driver Initialized.
130. Bluetooth: Core ver 2.20
131. NET: Registered protocol family 31
132. Bluetooth: HCI device and connection manager initialized
133. Bluetooth: HCI socket layer initialized
134. Bluetooth: L2CAP socket layer initialized
135. Bluetooth: SCO socket layer initialized
136. Switched to clocksource arch_sys_counter
137. NET: Registered protocol family 2
138. TCP established hash table entries: 4096 (order: 2, 16384 bytes)
139. TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
140. TCP: Hash tables configured (established 4096 bind 4096)
141. UDP hash table entries: 256 (order: 1, 8192 bytes)
142. UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
143. NET: Registered protocol family 1
144. RPC: Registered named UNIX socket transport module.
145. RPC: Registered udp transport module.
146. RPC: Registered tcp transport module.
147. RPC: Registered tcp NFSv4.1 backchannel transport module.
148. imx rpmsg driver is registered.
149. Bus freq driver module loaded
150. futex hash table entries: 512 (order: 3, 32768 bytes)
151. VFS: Disk quotas dquot_6.6.0
152. VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
153. NFS: Registering the id_resolver key type
154. Key type id_resolver registered
155. Key type id_legacy registered
156. jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
157. fuse init (API version 7.23)
158. io scheduler noop registered
159. io scheduler deadline registered
160. io scheduler cfq registered (default)
161. backlight supply power not found, using dummy regulator
162. MIPI DSI driver module loaded
163. 30760000.mipi-dsi supply disp-power-on not found, using dummy regulator
164. mxc_mipi_dsi_samsung 30760000.mipi-dsi: i.MX MIPI DSI driver probed
165. MIPI DSI driver module loaded
166. 30730000.lcdif supply lcd not found, using dummy regulator
167. mxc_mipi_dsi_samsung 30760000.mipi-dsi: MIPI DSI dispdrv inited!
168. mxsfb 30730000.lcdif: registered mxc display driver mipi_dsi_samsung
169. Console: switching to colour frame buffer device 40x40
170. mxsfb 30730000.lcdif: initialized
171. imx-sdma 30bd0000.sdma: no event needs to be remapped
172. imx-sdma 30bd0000.sdma: loaded firmware 4.2
173. imx-sdma 30bd0000.sdma: initialized
174. pfuze100-regulator 0-0008: Full layer: 1, Metal layer: 1
175. pfuze100-regulator 0-0008: FAB: 0, FIN: 0
176. pfuze100-regulator 0-0008: pfuze3000 found.
177. 30860000.serial: ttymxc0 at MMIO 0x30860000 (irq = 272, base_baud = 1500000) is a IMX
178. console [ttymxc0] enabled
179. 30880000.serial: ttymxc2 at MMIO 0x30880000 (irq = 273, base_baud = 5000000) is a IMX
180. imx sema4 driver is registered.
181. [drm] Initialized drm 1.1.0 20060810
182. [drm] Initialized vivante 1.0.0 20120216 on minor 0
183. brd: module loaded
184. loop: module loaded
185. input: fxos8700 as /devices/platform/soc/30800000.aips-bus/30a50000.i2c/i2c-3/3-001e/input/input0
186. fxos8700 device driver probe successfully
187. input: fxas2100x as /devices/platform/soc/30800000.aips-bus/30a50000.i2c/i2c-3/3-0020/input/input1
188. fxas2100x 3-0020: fxas2100x device driver probe successfully
189. CAN device driver interface
190. ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
191. ehci-mxc: Freescale On-Chip EHCI Host driver
192. u***core: registered new interface driver u***-storage
193. u***core: registered new interface driver u***_ehset_test
194. 30b10200.u***misc supply vbus-wakeup not found, using dummy regulator
195. 30b20200.u***misc supply vbus-wakeup not found, using dummy regulator
196. 30b30200.u***misc supply vbus-wakeup not found, using dummy regulator
197. mousedev: PS/2 mouse device common for all mice
198. input: 30370000.snvs:snvs-powerkey as /devices/platform/soc/30000000.aips-bus/30370000.snvs/30370000.snvs:snvs-powerkey/input/input2
199. [HXTP] Himax 852xES touch panel driver init
200. [HXTP] himax852xes_init_async:Enter
201. [HXTP] DT-himax_parse_dt:panel-coords = 0, 320, 0, 320
202. [HXTP] DT-himax_parse_dt:display-coords = (320, 320)
203. read mpl3115 chip id 0xc4
204. input: mpl3115 as /devices/virtual/input/input3
205. [HXTP] DT:gpio_rst value is not valid
206. [HXTP] DT:gpio_3v3_en value is not valid
207. [HXTP] DT:gpio_irq=1, gpio_rst=-2, gpio_3v3_en=-2[HXTP] DT:protocol_type=1[HXTP] DT-No vk info in DT
208. mpl3115 device driver probe successfullysnvs_rtc 30370000.snvs:snvs-rtc-lp: rtc core: registered 30370000.snvs:snvs- as rtc0
209. i2c /dev entries driver
210. IR NEC protocol handler initialized
211. IR RC5(x/sz) protocol handler initialized
212. IR RC6 protocol handler initialized
213. [HXTP][ERROR] i2c_himax_read:write reg error:reg=1
214. [HXTP][ERROR] Himax chip doesn NOT EXIST
215. IR JVC protocol handler initialized
216. IR Sony protocol handler initialized
217. IR SANYO protocol handler initialized
218. IR Sharp protocol handler initialized
219. IR MCE Keyboard/mouse protocol handler initialized
220. IR XMP protocol handler initialized
221. imx2-wdt 30280000.wdog: timeout 60 sec (nowayout=0)
222. Bluetooth: HCI UART driver ver 2.3
223. Bluetooth: HCI UART protocol H4 registered
224. u***core: registered new interface driver bcm203x
225. sdhci: Secure Digital Host Controller Interface driver
226. sdhci: Copyright(c) Pierre Ossman
227. sdhci-pltfm: SDHCI platform and OF driver helper
228. /soc/aips-bus@30800000/usdhc@30b40000: voltage-ranges unspecified
229. sdhci-esdhc-imx 30b40000.usdhc: assigned as wifi host
230. sdhci-esdhc-imx 30b40000.usdhc: No vmmc regulator found
231. sdhci-esdhc-imx 30b40000.usdhc: No vqmmc regulator found
232. mmc0: SDHCI controller on 30b40000.usdhc [30b40000.usdhc] using ADMA
233. /soc/aips-bus@30800000/usdhc@30b60000: voltage-ranges unspecified
234. sdhci-esdhc-imx 30b60000.usdhc: No vmmc regulator found
235. sdhci-esdhc-imx 30b60000.usdhc: No vqmmc regulator found
236. mmc2: SDHCI controller on 30b60000.usdhc [30b60000.usdhc] using ADMA
237. caam 30900000.caam: Entropy delay = 3200
238. caam 30900000.caam: Instantiated RNG4 SH0
239. caam 30900000.caam: Instantiated RNG4 SH1
240. caam 30900000.caam: device ID = 0x0a16030000000000 (Era -524)
241. caam 30900000.caam: job rings = 3, qi = 0
242. caam algorithms registered in /proc/crypto
243. caam_jr 30901000.jr0: registering rng-caam
244. platform caam_sm: blkkey_ex: 8 keystore units available
245. platform caam_sm: 64-bit clear key:
246. platform caam_sm: [0000] 00 01 02 03 04 0f 06 07
247. platform caam_sm: 64-bit black key:
248. platform caam_sm: [0000] b1 af 72 32 7b 68 af de
249. platform caam_sm: [0008] 34 da f0 30 7d 23 c0 a8
250. platform caam_sm: 128-bit clear key:
251. platform caam_sm: [0000] 00 01 02 03 04 0f 06 07
252. platform caam_sm: [0008] 08 09 0a 0b 0c 0d 0e 0f
253. platform caam_sm: 128-bit black key:
254. mmc2: MAN_BKOPS_EN bit is not set
255. platform caam_sm: [0000] 7f f4 4c 90 63 24 c2 5b
256. platform caam_sm: [0008] 63 ed 7f 20 12 8f 16 9f
257. platform caam_sm: 192-bit clear key:
258. platform caam_sm: [0000] 00 01 02 03 04 0f 06 07
259. platform caam_sm: [0008] 08 09 0a 0b 0c 0d 0e 0f
260. platform caam_sm: [0016] 10 11 12 13 14 15 16 17
261. platform caam_sm: 192-bit black key:
262. mmc2: mmc_select_hs200 failed, error -74
263. : switch to mmc2 failed
264. platform caam_sm: [0000] 45 bc e2 7d c6 61 34 6b
265. platform caam_sm: [0008] d3 7d 88 4a 85 ea 57 c7
266. mmc2: new MMC card at address 0001
267. platform caam_sm: [0016] 3a d5 8c 2b e0 e9 39 8c
268. mmcblk2: mmc2:0001 V10008 7.05 GiB
269. platform caam_sm: [0024] a2 b4 fc 61 ea 3a b1 83
270. platform caam_sm: 256-bit clear key:
271. mmcblk2boot0: mmc2:0001 V10008 partition 1 4.00 MiB
272. mmcblk2boot1: mmc2:0001 V10008 partition 2 4.00 MiB
273. platform caam_sm: [0000] 00 01 02 03 04 0f 06 07
274. platform caam_sm: [0008] 08 09 0a 0b 0c 0d 0e 0f
275. mmcblk2rpmb: mmc2:0001 V10008 partition 3 4.00 MiB
276. platform caam_sm: [0016] 10 11 12 13 14 15 16 17
277. mmcblk2: p1 p2
278. platform caam_sm: [0024] 18 19 1a 1b 1c 1d 1e 1f
279. platform caam_sm: 256-bit black key:
280. platform caam_sm: [0000] da 12 33 aa 0f 2f c3 2b
281. platform caam_sm: [0008] d2 00 7b 9f 22 db 19 62
282. platform caam_sm: [0016] 50 93 e7 01 eb e5 06 1a
283. platform caam_sm: [0024] 52 70 89 17 de 5e 59 a1
284. platform caam_sm: 64-bit unwritten blob:
285. platform caam_sm: [0000] 00 00 00 00 00 00 00 00
286. platform caam_sm: [0008] 00 00 00 00 00 00 00 00
287. platform caam_sm: [0016] 00 00 00 00 00 00 00 00
288. platform caam_sm: [0024] 00 00 00 00 00 00 00 00
289. platform caam_sm: [0032] 00 00 00 00 00 00 00 00
290. platform caam_sm: [0040] 00 00 00 00 00 00 00 00
291. platform caam_sm: [0048] 00 00 00 00 00 00 00 00
292. platform caam_sm: [0056] 00 00 00 00 00 00 00 00
293. platform caam_sm: [0064] 00 00 00 00 00 00 00 00
294. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
295. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
296. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
297. platform caam_sm: 128-bit unwritten blob:
298. platform caam_sm: [0000] 00 00 00 00 00 00 00 00
299. platform caam_sm: [0008] 00 00 00 00 00 00 00 00
300. platform caam_sm: [0016] 00 00 00 00 00 00 00 00
301. platform caam_sm: [0024] 00 00 00 00 00 00 00 00
302. platform caam_sm: [0032] 00 00 00 00 00 00 00 00
303. platform caam_sm: [0040] 00 00 00 00 00 00 00 00
304. platform caam_sm: [0048] 00 00 00 00 00 00 00 00
305. platform caam_sm: [0056] 00 00 00 00 00 00 00 00
306. platform caam_sm: [0064] 00 00 00 00 00 00 00 00
307. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
308. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
309. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
310. platform caam_sm: 196-bit unwritten blob:
311. platform caam_sm: [0000] 00 00 00 00 00 00 00 00
312. platform caam_sm: [0008] 00 00 00 00 00 00 00 00
313. platform caam_sm: [0016] 00 00 00 00 00 00 00 00
314. platform caam_sm: [0024] 00 00 00 00 00 00 00 00
315. platform caam_sm: [0032] 00 00 00 00 00 00 00 00
316. platform caam_sm: [0040] 00 00 00 00 00 00 00 00
317. platform caam_sm: [0048] 00 00 00 00 00 00 00 00
318. platform caam_sm: [0056] 00 00 00 00 00 00 00 00
319. platform caam_sm: [0064] 00 00 00 00 00 00 00 00
320. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
321. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
322. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
323. platform caam_sm: 256-bit unwritten blob:
324. platform caam_sm: [0000] 00 00 00 00 00 00 00 00
325. platform caam_sm: [0008] 00 00 00 00 00 00 00 00
326. platform caam_sm: [0016] 00 00 00 00 00 00 00 00
327. platform caam_sm: [0024] 00 00 00 00 00 00 00 00
328. platform caam_sm: [0032] 00 00 00 00 00 00 00 00
329. platform caam_sm: [0040] 00 00 00 00 00 00 00 00
330. platform caam_sm: [0048] 00 00 00 00 00 00 00 00
331. platform caam_sm: [0056] 00 00 00 00 00 00 00 00
332. platform caam_sm: [0064] 00 00 00 00 00 00 00 00
333. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
334. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
335. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
336. platform caam_sm: 64-bit black key in blob:
337. platform caam_sm: [0000] c4 18 13 b8 8a 86 a9 b5
338. platform caam_sm: [0008] 11 c2 63 60 69 e8 09 a9
339. platform caam_sm: [0016] c6 88 4f 21 ef f8 04 47
340. platform caam_sm: [0024] 52 2e 27 3a 46 b8 18 6b
341. platform caam_sm: [0032] fb fd 67 09 85 0f ce e4
342. platform caam_sm: [0040] e3 f4 50 1a 44 39 a6 47
343. platform caam_sm: [0048] c1 b5 ff b7 58 a7 76 4c
344. platform caam_sm: [0056] 00 00 00 00 00 00 00 00
345. platform caam_sm: [0064] 00 00 00 00 00 00 00 00
346. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
347. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
348. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
349. platform caam_sm: 128-bit black key in blob:
350. platform caam_sm: [0000] b1 22 06 95 79 04 99 10
351. platform caam_sm: [0008] 11 74 59 e5 01 78 76 e3
352. platform caam_sm: [0016] c6 8c dc f0 80 dc 77 b0
353. platform caam_sm: [0024] b5 13 c4 6e 52 6c 1a 66
354. platform caam_sm: [0032] f3 4e 21 66 ae b4 52 9a
355. platform caam_sm: [0040] ef 80 2b ec 4a 47 b4 3d
356. platform caam_sm: [0048] 19 d8 0d e7 03 a1 66 5e
357. platform caam_sm: [0056] 4b 14 cc cf 32 b4 a7 bb
358. platform caam_sm: [0064] 00 00 00 00 00 00 00 00
359. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
360. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
361. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
362. platform caam_sm: 192-bit black key in blob:
363. platform caam_sm: [0000] 1b e1 f7 7d 63 d8 7d 2f
364. platform caam_sm: [0008] 61 51 d3 d2 72 2f ef bf
365. platform caam_sm: [0016] 48 1d 3a 30 94 f6 76 75
366. platform caam_sm: [0024] 6a f8 76 5f c4 e3 94 cd
367. platform caam_sm: [0032] d5 61 e4 ba 76 72 6d 68
368. platform caam_sm: [0040] a4 c1 58 55 05 1e 95 2c
369. platform caam_sm: [0048] c9 bb fd ad 55 35 7e b6
370. platform caam_sm: [0056] b3 34 93 77 f5 3e 54 bd
371. platform caam_sm: [0064] 91 a1 b5 92 5c 5b e3 e7
372. platform caam_sm: [0072] 00 00 00 00 00 00 00 00
373. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
374. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
375. platform caam_sm: 256-bit black key in blob:
376. platform caam_sm: [0000] 41 a6 7f a1 e9 b6 78 fe
377. platform caam_sm: [0008] 65 ae a1 56 c8 7d 7a 8f
378. platform caam_sm: [0016] 07 30 3f 63 3a da 57 0f
379. platform caam_sm: [0024] a7 fd a7 2d a1 2d 87 13
380. platform caam_sm: [0032] 5c 78 5f 76 dc c8 6f 6f
381. platform caam_sm: [0040] 55 8b 23 fa 30 e4 36 2c
382. platform caam_sm: [0048] ee 56 e1 6b cb 8a 3a 7c
383. platform caam_sm: [0056] b1 c2 8c a0 c8 e1 4f 1e
384. platform caam_sm: [0064] 0f 02 e4 08 1f c4 ec 4c
385. platform caam_sm: [0072] 09 86 06 33 c7 ef a6 3f
386. platform caam_sm: [0080] 00 00 00 00 00 00 00 00
387. platform caam_sm: [0088] 00 00 00 00 00 00 00 00
388. platform caam_sm: restored 64-bit black key:
389. platform caam_sm: [0000] 3c b3 13 1e 1e 08 f1 30
390. platform caam_sm: [0008] 9f 60 5c 48 3f dc 9e 6a
391. platform caam_sm: restored 128-bit black key:
392. platform caam_sm: [0000] 7f f4 4c 90 63 24 c2 5b
393. platform caam_sm: [0008] 63 ed 7f 20 12 8f 16 9f
394. platform caam_sm: restored 192-bit black key:
395. platform caam_sm: [0000] 45 bc e2 7d c6 61 34 6b
396. platform caam_sm: [0008] d3 7d 88 4a 85 ea 57 c7
397. platform caam_sm: [0016] 43 e1 e4 63 a3 9d 3c 37
398. platform caam_sm: [0024] 53 3a 5e b5 35 be 33 42
399. platform caam_sm: restored 256-bit black key:
400. platform caam_sm: [0000] da 12 33 aa 0f 2f c3 2b
401. platform caam_sm: [0008] d2 00 7b 9f 22 db 19 62
402. platform caam_sm: [0016] 50 93 e7 01 eb e5 06 1a
403. platform caam_sm: [0024] 52 70 89 17 de 5e 59 a1
404. snvs-secvio 30370000.caam-snvs: can't get snvs clock
405. snvs-secvio 30370000.caam-snvs: violation handlers armed - non-secure state
406. u***core: registered new interface driver u***hid
407. u***hid: USB HID core driver
408. NET: Registered protocol family 26
409. NET: Registered protocol family 10
410. sit: IPv6 over IPv4 tunneling driver
411. NET: Registered protocol family 17
412. can: controller area network core (rev 20120528 abi 9)
413. NET: Registered protocol family 29
414. can: raw protocol (rev 20120528)
415. can: broadcast manager protocol (rev 20120528 t)
416. can: netlink gateway (rev 20130117) max_hops=1
417. Bluetooth: RFCOMM TTY layer initialized
418. Bluetooth: RFCOMM socket layer initialized
419. Bluetooth: RFCOMM ver 1.11
420. Bluetooth: BNEP (Ethernet Emulation) ver 1.3
421. Bluetooth: BNEP filters: protocol multicast
422. Bluetooth: BNEP socket layer initialized
423. Bluetooth: HIDP (Human Interface Emulation) ver 1.2
424. Bluetooth: HIDP socket layer initialized
425. 8021q: 802.1Q VLAN Support v1.8
426. Key type dns_resolver registered
427. cpu cpu0: dev_pm_opp_get_opp_count: device OPP not found (-19)
428. backlight supply power not found, using dummy regulator
429. sgtl5000 3-000a: sgtl5000 revision 0x11
430. sgtl5000 3-000a: Using internal LDO instead of VDDD
431. asoc-simple-card sound: sgtl5000 <-> 308a0000.sai mapping ok
432. backlight supply power not found, using dummy regulator
433. input: gpio-keys as /devices/platform/gpio-keys/input/input4
434. backlight supply power not found, using dummy regulator
435. snvs_rtc 30370000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:01 UTC (1)
436. wlreg_on: disabling
437. ALSA device list:
438. #0: imx7s-sgtl5000
439. EXT3-fs (mmcblk2p2): error: couldn't mount because of unsupported optional features (240)
440. EXT2-fs (mmcblk2p2): error: couldn't mount because of unsupported optional features (240)
441. EXT4-fs (mmcblk2p2): mounted filesystem with ordered data mode. Opts: (null)
442. VFS: Mounted root (ext4 filesystem) on device 179:2.
443. devtmpfs: mounted
444. Freeing unused kernel memory: 424K (80a64000 - 80ace000)
445. INIT: version 2.88 booting
446. Starting udev
447. udevd[168]: starting version 3.1.5
448. random: udevd urandom read with 14 bits of entropy available
449. EXT4-fs (mmcblk2p2): re-mounted. Opts: data=ordered
450. bootlogd: cannot allocate pseudo tty: No such file or directory
451. Populating dev cache
452. ALSA: Restoring mixer settings...
453. No state is present for card imx7ssgtl5000
454. Found hardware: "imx7s-sgtl5000" "" "" "" ""
455. Hardware is initialized using a generic method
456. No state is present for card imx7ssgtl5000
457. Wed Sep 13 14:30:52 UTC 2017
458. INIT: Entering runlevel: 5
459. Configuring network interfaces... ifconfig: SIOCGIFFLAGS: No such device
460. Starting Xserver
461. Starting system message bus: dbus.
462. Starting Connection Manager
463. Starting OpenBSD Secure Shell server: sshd
464. generating ssh RSA key...
465. generating ssh ECDSA key...
466. generating ssh DSA key...
467. generating ssh ED25519 key...
468. done.
469. Starting rPCBind daemon...done.
470. Starting bluetooth
471. bluetoothd
472. Starting syslogd/klogd: done
473. * Starting Avahi mDNS/DNS-SD Daemon: avahi-daemon
474. ...done.
475. Starting Telephony daemon
476. Starting Linux NFC daemon
477. qft Running local boot scripts (/etc/rc.local)dhd_module_init in
478. Power-up adapter 'DHD generic adapter'
479. wifi_platform_bus_enumerate device present 1
480. mmc0: queuing unknown CIS tuple 0x80 (2 bytes)
481. mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
482. mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
483. mmc0: queuing unknown CIS tuple 0x80 (7 bytes)
484. mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
485. mmc0: queuing unknown CIS tuple 0x80 (6 bytes)
486. mmc0: new high speed SDIO card at address 0001
487. backlight supply power not found, using dummy regulator
488. backlight supply power not found, using dummy regulator
489. backlight supply power not found, using dummy regulator
490. F1 signature OK, socitype:0x1 chip:0xa9a6 rev:0x1 pkg:0x3
491. DHD: dongle ram size is set to 524288(orig 524288) at 0x0
492. wifi_platform_get_mac_addr
493. CFG80211-ERROR) wl_setup_wiphy : Registering Vendor80211)
494. wl_create_event_handler(): thread:wl_event_handler:2da started
495. CFG80211-ERROR) wl_event_handler : tsk Enter, tsk = 0x88dc143c
496. dhd_attach(): thread:dhd_watchdog_thread:2db started
497. dhd_attach(): thread:dhd_dpc:2dc started
498. dhd_deferred_work_init: work queue initialized
500. Dongle Host Driver, version 1.141.88 (r)
501. Compiled from
502. Register interface [wlan0] MAC: 00:90:4c:11:22:33
504. CFG80211-ERROR) wl_event_handler : was terminated
505. wl_destroy_event_handler(): thread:wl_event_handler:2da terminated OK
506. dhd_prot_ioctl : bus is down. we have nothing to do
507. backlight supply power not found, using dummy regulator
508. backlight supply power not found, using dummy regulator
511. Dongle Host Driver, version 1.141.88 (r)
512. Compiled from
513. wl_android_wifi_on in
514. mmc0: queuing unknown CIS tuple 0x80 (2 bytes)
515. mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
516. mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
517. mmc0: queuing unknown CIS tuple 0x80 (7 bytes)
518. F1 signature OK, socitype:0x1 chip:0xa9a6 rev:0x1 pkg:0x3
519. DHD: dongle ram size is set to 524288(orig 524288) at 0x0
520. dhdsdio_write_vars: Download, Upload and compare of NVRAM succeeded.
521. dhd_bus_init: enable 0x06, ready 0x06 (waited 0us)
522. wifi_platform_get_mac_addr
523. Firmware up: op_mode=0x0005, MAC=60:f1:89:45:5c:4d
524. Firmware version = wl0: Dec 11 2014 04:20:45 version 7.10.323.34 (r520360) FWID 01-ea2beeba
525. dhd_wlfc_init(): successfully enabled bdcv2 tlv signaling, 79
526. dhd_wlfc_init: query wlfc_mode succeed, fw_caps=0x1c
527. dhd_wlfc_init(): wlfc_mode=0x1c, ret=0
528. CFG80211-ERROR) wl_update_wiphybands : error reading vhtmode (-23)
529. wl_create_event_handler(): thread:wl_event_handler:2e0 started
530. CFG80211-ERROR) wl_event_handler : tsk Enter, tsk = 0x88dc143c
531. Enter the network name (SSID)= CU_5CuJ
532. Type the passphrase for the network and hit enter PSW= ydhfcnfx
533. cat: can't open '/etc/wpasupplicant.conf': No such file or directory
534. Successfully initialized wpa_supplicant
535. rfkill: Cannot open RFKILL control device
536. random: nonblocking pool is initialized
537. udhcpc (v1.24.1) started
538. Sending discover...
539. CFG80211-ERROR) wl_notify_scan_status : scan is not ready
540. CFG80211-ERROR) wl_cfg80211_connect : Connecting with68:8a:f0:4a:64:b8 channel (11) ssid "CU_5CuJ", len (7)
542. wl_bss_connect_done succeeded with 68:8a:f0:4a:64:b8
543. wl_bss_connect_done succeeded with 68:8a:f0:4a:64:b8
544. Sending discover...
545. Sending select for 192.168.1.6...
546. Lease of 192.168.1.6 obtained, lease time 86400
547. /etc/udhcpc.d/50default: Adding DNS 192.168.1.1
548. You can now use the ping command to test your connection
549. .
551. Poky (Yocto Project Reference Distro) 2.1.3 imx7s-warp /dev/ttymxc0
553. imx7s-warp login: root
554. root@imx7s-warp:~#
555. root@imx7s-warp:~#
556. root@imx7s-warp:~#
557. root@imx7s-warp:~# cat /sys/power/state
558. freeze standby mem
559. root@imx7s-warp:~# echo mem > /sys/power/state
560. state_store call pm_suspend
561. imx7_pm_valid
562. PM: Syncing filesystems ... done.
563. Freezing user space processes ... (elapsed 0.001 seconds) done.
564. Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
565. enter_state call suspend_devices_and_enter
566. fxos8700_suspend
567. [HXTP] himax852xes_suspend: Driver probe fail.
568. PM: suspend of devices complete after 156.476 msecs
569. PM: suspend devices took 0.160 seconds
570. suspend_devices_and_enter call suspend_enter
571. PM: late suspend of devices complete after 0.788 msecs
572. PM: noirq suspend of devices complete after 0.754 msecs
573. Disabling non-boot CPUs ...
574. suspend_enter suspend_ops->enter(state)
575. Turn off Mega/Fast mix in DSM
复制代码

warp7使用BC3370电池，其datasheet很容易从nxp的网站上下载。我认为应该从下面几个方面来分析电池：1）电池的容量，充电电压和电流范围，充放电保护机制；2）电池与CPU连接方法，充放电标志；3）CPU对电池电量，电压和电流检测机制。4）电池充放电曲线。
对于1和4来说主要是电池datasheet的研读，其实最好的方法是询问技术支持。对于2和3来说需要编程来实现具体功能。而对于BC3770来说我们可做的比较少。

在warp7上确定BC3770连接方式和充放电标志，见下图：这里需要注意的是原理图上显示i2c1，而实际编程中要使用i2c0。
BC3770 IIC设备地址，以及其寄存器和主要寄存器说明：
根据上面的各种说明可以完成下面的源代码。
可执行程序在不接入电池和接电池的两种情况运行结果如下，因为时间其他寄存器就不在验证，但是基本的处理逻辑都很类似。

总结：
1）warp7的待机功能还需要进一步处理，我认为待机自小电流至少在10mA之内。
2）电池驱动和充放电上层管理程序都没有默认添加，需要自己添加，也需要不小的工作量。

搜索历史

【WaRP7试用体验】9.WaRP7开发板上待机功能分析和bc3770电池分析

相关推荐

评论

精选推荐

热门帖

站长推荐 /6