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Linux/Documentation/devicetree/bindings/serial/8250.yaml

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Diff markup

Differences between /Documentation/devicetree/bindings/serial/8250.yaml (Version linux-6.12-rc7) and /Documentation/devicetree/bindings/serial/8250.yaml (Version linux-5.1.21)


  1 # Copyright 2020 Lubomir Rintel <lkundrak@v3.sk    
  2 %YAML 1.2                                         
  3 ---                                               
  4 $id: http://devicetree.org/schemas/serial/8250    
  5 $schema: http://devicetree.org/meta-schemas/co    
  6                                                   
  7 title: UART (Universal Asynchronous Receiver/T    
  8                                                   
  9 maintainers:                                      
 10   - devicetree@vger.kernel.org                    
 11                                                   
 12 allOf:                                            
 13   - $ref: serial.yaml#                            
 14   - $ref: /schemas/memory-controllers/mc-perip    
 15   - if:                                           
 16       anyOf:                                      
 17         - required:                               
 18             - aspeed,lpc-io-reg                   
 19         - required:                               
 20             - aspeed,lpc-interrupts               
 21         - required:                               
 22             - aspeed,sirq-polarity-sense          
 23     then:                                         
 24       properties:                                 
 25         compatible:                               
 26           const: aspeed,ast2500-vuart             
 27   - if:                                           
 28       properties:                                 
 29         compatible:                               
 30           const: mrvl,mmp-uart                    
 31     then:                                         
 32       properties:                                 
 33         reg-shift:                                
 34           const: 2                                
 35       required:                                   
 36         - reg-shift                               
 37   - if:                                           
 38       not:                                        
 39         properties:                               
 40           compatible:                             
 41             items:                                
 42               - enum:                             
 43                   - ns8250                        
 44                   - ns16450                       
 45                   - ns16550                       
 46                   - ns16550a                      
 47     then:                                         
 48       anyOf:                                      
 49         - required: [ clock-frequency ]           
 50         - required: [ clocks ]                    
 51                                                   
 52 properties:                                       
 53   compatible:                                     
 54     oneOf:                                        
 55       - const: ns8250                             
 56       - const: ns16450                            
 57       - const: ns16550                            
 58       - const: ns16550a                           
 59       - const: ns16850                            
 60       - const: aspeed,ast2400-vuart               
 61       - const: aspeed,ast2500-vuart               
 62       - const: intel,xscale-uart                  
 63       - const: mrvl,pxa-uart                      
 64       - const: nuvoton,wpcm450-uart               
 65       - const: nuvoton,npcm750-uart               
 66       - const: nvidia,tegra20-uart                
 67       - const: nxp,lpc3220-uart                   
 68       - items:                                    
 69           - enum:                                 
 70               - exar,xr16l2552                    
 71               - exar,xr16l2551                    
 72               - exar,xr16l2550                    
 73           - const: ns8250                         
 74       - items:                                    
 75           - enum:                                 
 76               - altr,16550-FIFO32                 
 77               - altr,16550-FIFO64                 
 78               - altr,16550-FIFO128                
 79               - fsl,16550-FIFO64                  
 80               - fsl,ns16550                       
 81               - andestech,uart16550               
 82               - nxp,lpc1850-uart                  
 83               - opencores,uart16550-rtlsvn105     
 84               - ti,da830-uart                     
 85           - const: ns16550a                       
 86       - items:                                    
 87           - enum:                                 
 88               - ns16750                           
 89               - cavium,octeon-3860-uart           
 90               - xlnx,xps-uart16550-2.00.b         
 91               - ralink,rt2880-uart                
 92           - enum:                                 
 93               - ns16550 # Deprecated, unless t    
 94               - ns16550a                          
 95       - items:                                    
 96           - enum:                                 
 97               - nuvoton,npcm845-uart              
 98           - const: nuvoton,npcm750-uart           
 99       - items:                                    
100           - enum:                                 
101               - ralink,mt7620a-uart               
102               - ralink,rt3052-uart                
103               - ralink,rt3883-uart                
104           - const: ralink,rt2880-uart             
105           - enum:                                 
106               - ns16550 # Deprecated, unless t    
107               - ns16550a                          
108       - items:                                    
109           - enum:                                 
110               - mediatek,mt7622-btif              
111               - mediatek,mt7623-btif              
112           - const: mediatek,mtk-btif              
113       - items:                                    
114           - const: mrvl,mmp-uart                  
115           - const: intel,xscale-uart              
116       - items:                                    
117           - enum:                                 
118               - nvidia,tegra30-uart               
119               - nvidia,tegra114-uart              
120               - nvidia,tegra124-uart              
121               - nvidia,tegra210-uart              
122               - nvidia,tegra186-uart              
123               - nvidia,tegra194-uart              
124               - nvidia,tegra234-uart              
125           - const: nvidia,tegra20-uart            
126                                                   
127   reg:                                            
128     maxItems: 1                                   
129                                                   
130   interrupts:                                     
131     maxItems: 1                                   
132                                                   
133   clock-frequency: true                           
134                                                   
135   clocks:                                         
136     maxItems: 1                                   
137                                                   
138   resets:                                         
139     maxItems: 1                                   
140                                                   
141   current-speed:                                  
142     $ref: /schemas/types.yaml#/definitions/uin    
143     description: The current active speed of t    
144                                                   
145   reg-offset:                                     
146     $ref: /schemas/types.yaml#/definitions/uin    
147     description: |                                
148       Offset to apply to the mapbase from the     
149                                                   
150   reg-shift:                                      
151     description: Quantity to shift the registe    
152                                                   
153   reg-io-width:                                   
154     description: |                                
155       The size (in bytes) of the IO accesses t    
156       device. There are some systems that requ    
157       UART (e.g. TI davinci).                     
158                                                   
159   used-by-rtas:                                   
160     type: boolean                                 
161     description: |                                
162       Set to indicate that the port is in use     
163       should not be registered.                   
164                                                   
165   no-loopback-test:                               
166     type: boolean                                 
167     description: |                                
168       Set to indicate that the port does not i    
169                                                   
170   fifo-size:                                      
171     $ref: /schemas/types.yaml#/definitions/uin    
172     description: The fifo size of the UART.       
173                                                   
174   auto-flow-control:                              
175     type: boolean                                 
176     description: |                                
177       One way to enable automatic flow control    
178       allowed to detect support for the capabi    
179       property.                                   
180                                                   
181   tx-threshold:                                   
182     description: |                                
183       Specify the TX FIFO low water indication    
184       TX FIFO thresholds.                         
185                                                   
186   overrun-throttle-ms:                            
187     description: |                                
188       How long to pause uart rx when input ove    
189                                                   
190   rts-gpios: true                                 
191   cts-gpios: true                                 
192   dtr-gpios: true                                 
193   dsr-gpios: true                                 
194   rng-gpios: true                                 
195   dcd-gpios: true                                 
196                                                   
197   aspeed,sirq-polarity-sense:                     
198     $ref: /schemas/types.yaml#/definitions/pha    
199     description: |                                
200       Phandle to aspeed,ast2500-scu compatible    
201       offset and bit number to identify how th    
202       configured. One possible data source is     
203       applicable to aspeed,ast2500-vuart.         
204     deprecated: true                              
205                                                   
206   aspeed,lpc-io-reg:                              
207     $ref: /schemas/types.yaml#/definitions/uin    
208     maxItems: 1                                   
209     description: |                                
210       The VUART LPC address.  Only applicable     
211                                                   
212   aspeed,lpc-interrupts:                          
213     $ref: /schemas/types.yaml#/definitions/uin    
214     minItems: 2                                   
215     maxItems: 2                                   
216     description: |                                
217       A 2-cell property describing the VUART S    
218       polarity (IRQ_TYPE_LEVEL_LOW or IRQ_TYPE    
219       applicable to aspeed,ast2500-vuart.         
220                                                   
221 required:                                         
222   - reg                                           
223   - interrupts                                    
224                                                   
225 unevaluatedProperties: false                      
226                                                   
227 examples:                                         
228   - |                                             
229     serial@80230000 {                             
230         compatible = "ns8250";                    
231         reg = <0x80230000 0x100>;                 
232         interrupts = <10>;                        
233         reg-shift = <2>;                          
234         clock-frequency = <48000000>;             
235     };                                            
236   - |                                             
237     #include <dt-bindings/gpio/gpio.h>            
238     serial@49042000 {                             
239         compatible = "andestech,uart16550", "n    
240         reg = <0x49042000 0x400>;                 
241         interrupts = <80>;                        
242         clock-frequency = <48000000>;             
243         cts-gpios = <&gpio3 5 GPIO_ACTIVE_LOW>    
244         rts-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>    
245         dtr-gpios = <&gpio1 12 GPIO_ACTIVE_LOW    
246         dsr-gpios = <&gpio1 13 GPIO_ACTIVE_LOW    
247         dcd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW    
248         rng-gpios = <&gpio1 15 GPIO_ACTIVE_LOW    
249     };                                            
250   - |                                             
251     #include <dt-bindings/clock/aspeed-clock.h    
252     #include <dt-bindings/interrupt-controller    
253     serial@1e787000 {                             
254         compatible = "aspeed,ast2500-vuart";      
255         reg = <0x1e787000 0x40>;                  
256         reg-shift = <2>;                          
257         interrupts = <8>;                         
258         clocks = <&syscon ASPEED_CLK_APB>;        
259         no-loopback-test;                         
260         aspeed,lpc-io-reg = <0x3f8>;              
261         aspeed,lpc-interrupts = <4 IRQ_TYPE_LE    
262     };                                            
263                                                   
264 ...                                               
                                                      

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