1 What: /sys/devices/platform/firmware
2 Date: March 2020
3 KernelVersion: 5.6
4 Contact: "Jolly Shah" <jollys@xilinx.com
5 Description:
6 Read/Write PMU global general
7 GLOBAL_GEN_STORAGE{0:3}.
8 Global general storage registe
9 by system to pass information
10
11 The register is reset during s
12 resets. Three registers are us
13 other Xilinx software products
14
15 Usage::
16
17 # cat /sys/devices/platfor
18 # echo <value> > /sys/devi
19
20 Example::
21
22 # cat /sys/devices/platfor
23 # echo 0x1234ABCD > /sys/d
24
25 Users: Xilinx
26
27 What: /sys/devices/platform/firmware
28 Date: March 2020
29 KernelVersion: 5.6
30 Contact: "Jolly Shah" <jollys@xilinx.com
31 Description:
32 Read/Write PMU persistent glob
33 value, PERS_GLOB_GEN_STORAGE{0
34 Persistent global general stor
35 can be used by system to pass
36 masters.
37
38 This register is only reset by
39 and maintains its value throug
40 Four registers are used by the
41 software products: PERS_GLOB_G
42 Register is reset only by a PO
43
44 Usage::
45
46 # cat /sys/devices/platfor
47 # echo <value> > /sys/devi
48
49 Example::
50
51 # cat /sys/devices/platfor
52 # echo 0x1234ABCD > /sys/d
53
54 Users: Xilinx
55
56 What: /sys/devices/platform/firmware
57 Date: March 2020
58 KernelVersion: 5.6
59 Contact: "Jolly Shah" <jollys@xilinx.com
60 Description:
61 This sysfs interface allows to
62 next shutdown request. When th
63 platform specific portion of P
64 shutdown scope.
65
66 Following are available shutdo
67
68 subsystem:
69 Only the APU a
70 not used by ot
71 shut down. Thi
72 domain being s
73 processing uni
74 ps_only:
75 The complete P
76 RPU, PMU, etc.
77 remains untouc
78 system:
79 The complete s
80
81 Usage::
82
83 # cat /sys/devices/platfor
84 # echo <scope> > /sys/devi
85
86 Example::
87
88 # cat /sys/devices/platfor
89 # echo "subsystem" > /sys/
90
91 Users: Xilinx
92
93 What: /sys/devices/platform/firmware
94 Date: March 2020
95 KernelVersion: 5.6
96 Contact: "Jolly Shah" <jollys@xilinx.com
97 Description:
98 This sysfs interface allows to
99 is compiled with CHECK_HEALTHY
100 bit on FPD WDT expiration. If
101 application running in Linux,
102 healthy bit is not set during
103 system restart.
104
105 Usage:
106
107 Set healthy bit::
108
109 # echo 1 > /sys/devices/pl
110
111 Unset healthy bit::
112
113 # echo 0 > /sys/devices/pl
114
115 Users: Xilinx
116
117 What: /sys/devices/platform/firmware
118 Date: Feb 2022
119 KernelVersion: 5.18
120 Contact: "Ronak Jain" <ronak.jain@xilinx
121 Description:
122 This sysfs interface allows us
123 runtime. The user can enable o
124 firmware as well as the user c
125 the features at runtime. The s
126 temperature and external watch
127 is completely different than t
128 watchdog is running on the fir
129 the health of firmware not APU
130 watchdog is interfaced outside
131
132 The supported config ids are f
133 1. PM_FEATURE_OVERTEMP_STATUS
134 disable the over temperature f
135 2. PM_FEATURE_OVERTEMP_VALUE =
136 over temperature limit in Degr
137 3. PM_FEATURE_EXTWDT_STATUS =
138 the external watchdog feature.
139 4. PM_FEATURE_EXTWDT_VALUE = 4
140 external watchdog feature.
141
142 Usage:
143
144 Select over temperature config
145 # echo 1 > /sys/devices/platfo
146
147 Check over temperature config
148 # cat /sys/devices/platform/fi
149 The expected result is 1.
150
151 Select over temperature config
152 # echo 2 > /sys/devices/platfo
153
154 Check over temperature config
155 # cat /sys/devices/platform/fi
156 The expected result is 2.
157
158 Select external watchdog confi
159 # echo 3 > /sys/devices/platfo
160
161 Check external watchdog config
162 # cat /sys/devices/platform/fi
163 The expected result is 3.
164
165 Select external watchdog confi
166 # echo 4 > /sys/devices/platfo
167
168 Check external watchdog config
169 # cat /sys/devices/platform/fi
170 The expected result is 4.
171
172 Users: Xilinx
173
174 What: /sys/devices/platform/firmware
175 Date: Feb 2022
176 KernelVersion: 5.18
177 Contact: "Ronak Jain" <ronak.jain@xilinx
178 Description:
179 This sysfs interface allows to
180 The user can enable or disable
181 Also, the user can configure t
182 at runtime. The supported feat
183 external watchdog. Here, the e
184 different than the /dev/watchd
185 running on the firmware and it
186 of firmware not APU(Linux). Al
187 interfaced outside of the zynq
188
189 By default the features are di
190 can enable features by queryin
191 features.
192
193 The default limit for the over
194 The default timer interval for
195
196 The supported config ids are f
197 1. PM_FEATURE_OVERTEMP_STATUS
198 disable the over temperature f
199 2. PM_FEATURE_OVERTEMP_VALUE =
200 over temperature limit in Degr
201 3. PM_FEATURE_EXTWDT_STATUS =
202 the external watchdog feature.
203 4. PM_FEATURE_EXTWDT_VALUE = 4
204 external watchdog feature.
205
206 Usage:
207
208 Enable over temperature featur
209 # echo 1 > /sys/devices/platfo
210 # echo 1 > /sys/devices/platfo
211
212 Check whether the over tempera
213 # cat /sys/devices/platform/fi
214 The expected result is 1.
215
216 Disable over temperature featu
217 # echo 1 > /sys/devices/platfo
218 # echo 0 > /sys/devices/platfo
219
220 Check whether the over tempera
221 # cat /sys/devices/platform/fi
222 The expected result is 0.
223
224 Configure over temperature lim
225 # echo 2 > /sys/devices/platfo
226 # echo 50 > /sys/devices/platf
227
228 Check whether the over tempera
229 # cat /sys/devices/platform/fi
230 The expected result is 50.
231
232 Enable external watchdog featu
233 # echo 3 > /sys/devices/platfo
234 # echo 1 > /sys/devices/platfo
235
236 Check whether the external wat
237 # cat /sys/devices/platform/fi
238 The expected result is 1.
239
240 Disable external watchdog feat
241 # echo 3 > /sys/devices/platfo
242 # echo 0 > /sys/devices/platfo
243
244 Check whether the external wat
245 # cat /sys/devices/platform/fi
246 The expected result is 0.
247
248 Configure external watchdog ti
249 # echo 4 > /sys/devices/platfo
250 # echo 500 > /sys/devices/plat
251
252 Check whether the external wat
253 # cat /sys/devices/platform/fi
254 The expected result is 500.
255
256 Users: Xilinx
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