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TOMOYO Linux Cross Reference
Linux/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp

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Diff markup

Differences between /Documentation/ABI/stable/sysfs-driver-firmware-zynqmp (Version linux-6.12-rc7) and /Documentation/ABI/stable/sysfs-driver-firmware-zynqmp (Version linux-4.11.12)


  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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