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Diffstat (limited to 'documentation/dev-manual/dev-manual-bsp-appendix.xml')
-rw-r--r-- | documentation/dev-manual/dev-manual-bsp-appendix.xml | 468 |
1 files changed, 250 insertions, 218 deletions
diff --git a/documentation/dev-manual/dev-manual-bsp-appendix.xml b/documentation/dev-manual/dev-manual-bsp-appendix.xml index e9f4cb022a..9ccad105b7 100644 --- a/documentation/dev-manual/dev-manual-bsp-appendix.xml +++ b/documentation/dev-manual/dev-manual-bsp-appendix.xml | |||
@@ -184,165 +184,191 @@ | |||
184 | Right now you have two identical BSP layers with different names: | 184 | Right now you have two identical BSP layers with different names: |
185 | <filename>meta-crownbay</filename> and <filename>meta-mymachine</filename>. | 185 | <filename>meta-crownbay</filename> and <filename>meta-mymachine</filename>. |
186 | You need to change your configurations so that they work for your new BSP and | 186 | You need to change your configurations so that they work for your new BSP and |
187 | your particular hardware. | 187 | your particular hardware. |
188 | We will look first at the configurations, which are all done in the layer’s | 188 | The following sections look at each of these areas of the BSP. |
189 | <filename>conf</filename> directory. | 189 | </para> |
190 | </para> | 190 | |
191 | 191 | <section id='changing-the-bsp-configuration'> | |
192 | <para> | 192 | <title>Changing the BSP Configuration</title> |
193 | First, since in this example the new BSP will not support EMGD we will get rid of the | 193 | |
194 | <filename>crownbay.conf</filename> file and then rename the | 194 | <para> |
195 | <filename>crownbay-noemgd.conf</filename> file to <filename>mymachine.conf</filename>. | 195 | We will look first at the configurations, which are all done in the layer’s |
196 | Much of what we do in the configuration directory is designed to help the Yocto Project | 196 | <filename>conf</filename> directory. |
197 | build system work with the new layer and to be able to find and use the right software. | 197 | </para> |
198 | The following two commands result in a single machine configuration file named | 198 | |
199 | <filename>mymachine.conf</filename>. | 199 | <para> |
200 | <literallayout class='monospaced'> | 200 | First, since in this example the new BSP will not support EMGD we will get rid of the |
201 | <filename>crownbay.conf</filename> file and then rename the | ||
202 | <filename>crownbay-noemgd.conf</filename> file to <filename>mymachine.conf</filename>. | ||
203 | Much of what we do in the configuration directory is designed to help the Yocto Project | ||
204 | build system work with the new layer and to be able to find and use the right software. | ||
205 | The following two commands result in a single machine configuration file named | ||
206 | <filename>mymachine.conf</filename>. | ||
207 | <literallayout class='monospaced'> | ||
201 | $ rm meta-mymachine/conf/machine/crownbay.conf | 208 | $ rm meta-mymachine/conf/machine/crownbay.conf |
202 | $ mv meta-mymachine/conf/machine/crownbay-noemgd.conf \ | 209 | $ mv meta-mymachine/conf/machine/crownbay-noemgd.conf \ |
203 | meta-mymachine/conf/machine/mymachine.conf | 210 | meta-mymachine/conf/machine/mymachine.conf |
204 | </literallayout> | 211 | </literallayout> |
205 | </para> | 212 | </para> |
206 | 213 | ||
207 | <para> | 214 | <para> |
208 | The next step makes changes to <filename>mymachine.conf</filename> itself. | 215 | The next step makes changes to <filename>mymachine.conf</filename> itself. |
209 | The only changes needed for this example are changes to the comment lines. | 216 | The only changes needed for this example are changes to the comment lines. |
210 | Here we simply substitute the Crown Bay name with an appropriate name. | 217 | Here we simply substitute the Crown Bay name with an appropriate name. |
211 | </para> | 218 | </para> |
212 | 219 | ||
213 | <para> | 220 | <para> |
214 | Note that inside the <filename>mymachine.conf</filename> is the | 221 | Note that inside the <filename>mymachine.conf</filename> is the |
215 | <filename>PREFERRED_PROVIDER_virtual/kernel</filename> statement. | 222 | <filename>PREFERRED_PROVIDER_virtual/kernel</filename> statement. |
216 | This statement identifies the kernel that the BSP is going to use. | 223 | This statement identifies the kernel that the BSP is going to use. |
217 | In this case the BSP is using <filename>linux-yocto</filename>, which is the | 224 | In this case the BSP is using <filename>linux-yocto</filename>, which is the |
218 | current Linux Yocto kernel based on the Linux 2.6.37 release. | 225 | current Linux Yocto kernel based on the Linux 2.6.37 release. |
219 | </para> | 226 | </para> |
220 | 227 | ||
221 | <para> | 228 | <para> |
222 | The next configuration file in the new BSP layer we need to edit is <filename>layer.conf</filename>. | 229 | The next configuration file in the new BSP layer we need to edit is <filename>layer.conf</filename>. |
223 | This file identifies build information needed for the new layer. | 230 | This file identifies build information needed for the new layer. |
224 | You can see the | 231 | You can see the |
225 | <ulink url='http://www.yoctoproject.org/docs/1.1/bsp-guide/bsp-guide.html#bsp-filelayout-layer'> | 232 | <ulink url='http://www.yoctoproject.org/docs/1.1/bsp-guide/bsp-guide.html#bsp-filelayout-layer'> |
226 | Layer Configuration File</ulink> section in the Board Support Packages (BSP) Development Guide | 233 | Layer Configuration File</ulink> section in the Board Support Packages (BSP) Development Guide |
227 | for more information on this configuration file. | 234 | for more information on this configuration file. |
228 | Basically, we are changing the existing statements to work with our BSP. | 235 | Basically, we are changing the existing statements to work with our BSP. |
229 | </para> | 236 | </para> |
230 | 237 | ||
231 | <para> | 238 | <para> |
232 | The file contains these statements that reference the Crown Bay BSP: | 239 | The file contains these statements that reference the Crown Bay BSP: |
233 | <literallayout class='monospaced'> | 240 | <literallayout class='monospaced'> |
234 | BBFILE_COLLECTIONS += "crownbay" | 241 | BBFILE_COLLECTIONS += "crownbay" |
235 | BBFILE_PATTERN_crownbay := "^${LAYERDIR}/" | 242 | BBFILE_PATTERN_crownbay := "^${LAYERDIR}/" |
236 | BBFILE_PRIORITY_crownbay = "6" | 243 | BBFILE_PRIORITY_crownbay = "6" |
237 | </literallayout> | 244 | </literallayout> |
238 | </para> | 245 | </para> |
239 | 246 | ||
240 | <para> | 247 | <para> |
241 | Simply substitute the machine string name <filename>crownbay</filename> | 248 | Simply substitute the machine string name <filename>crownbay</filename> |
242 | with the new machine name <filename>mymachine</filename> to get the following: | 249 | with the new machine name <filename>mymachine</filename> to get the following: |
243 | <literallayout class='monospaced'> | 250 | <literallayout class='monospaced'> |
244 | BBFILE_COLLECTIONS_mymachine += "mymachine" | 251 | BBFILE_COLLECTIONS_mymachine += "mymachine" |
245 | BBFILE_PATTERN_mymachine := "^${LAYERDIR}/" | 252 | BBFILE_PATTERN_mymachine := "^${LAYERDIR}/" |
246 | BBFILE_PRIORITY_mymachine = "6" | 253 | BBFILE_PRIORITY_mymachine = "6" |
247 | </literallayout> | 254 | </literallayout> |
248 | </para> | 255 | </para> |
249 | 256 | </section> | |
250 | <para> | 257 | |
251 | Now we will take a look at the recipes in your new layer. | 258 | <section id='changing-the-recipes-in-your-bsp'> |
252 | The standard BSP structure has areas for BSP, graphics, core, and kernel recipes. | 259 | <title>Changing the Recipes in Your BSP</title> |
253 | When you create a BSP you use these areas for appropriate recipes and append files. | 260 | |
254 | Recipes take the form of <filename>.bb</filename> files. | 261 | <para> |
255 | If you want to leverage the existing recipes the Yocto Project build system uses | 262 | Now we will take a look at the recipes in your new layer. |
256 | but change those recipes you can use <filename>.bbappend</filename> files. | 263 | The standard BSP structure has areas for BSP, graphics, core, and kernel recipes. |
257 | All new recipes and append files for your layer must go in the layer’s | 264 | When you create a BSP you use these areas for appropriate recipes and append files. |
258 | <filename>recipes-bsp</filename>, <filename>recipes-kernel</filename>, | 265 | Recipes take the form of <filename>.bb</filename> files. |
259 | <filename>recipes-core</filename>, and | 266 | If you want to leverage the existing recipes the Yocto Project build system uses |
260 | <filename>recipes-graphics</filename> directories. | 267 | but change those recipes you can use <filename>.bbappend</filename> files. |
261 | </para> | 268 | All new recipes and append files for your layer must go in the layer’s |
262 | 269 | <filename>recipes-bsp</filename>, <filename>recipes-kernel</filename>, | |
263 | <para> | 270 | <filename>recipes-core</filename>, and |
264 | First, let's look at <filename>recipes-bsp</filename>. | 271 | <filename>recipes-graphics</filename> directories. |
265 | For this example we are not adding any new BSP recipes. | 272 | </para> |
266 | And, we only need to remove the formfactor we do not want and change the name of | 273 | |
267 | the remaining one that doesn't support EMGD. | 274 | <section id='changing-recipes-bsp'> |
268 | These commands take care of the <filename>recipes-bsp</filename> recipes: | 275 | <title>Changing <filename>recipes-bsp</filename></title> |
269 | <literallayout class='monospaced'> | 276 | |
277 | <para> | ||
278 | First, let's look at <filename>recipes-bsp</filename>. | ||
279 | For this example we are not adding any new BSP recipes. | ||
280 | And, we only need to remove the formfactor we do not want and change the name of | ||
281 | the remaining one that doesn't support EMGD. | ||
282 | These commands take care of the <filename>recipes-bsp</filename> recipes: | ||
283 | <literallayout class='monospaced'> | ||
270 | $ rm ‐rf meta-mymachine/recipes-graphics/xorg-xserver/*emgd* | 284 | $ rm ‐rf meta-mymachine/recipes-graphics/xorg-xserver/*emgd* |
271 | $ mv meta-mymachine/recipes-bsp/formfactor/formfactor/crownbay-noemgd/ \ | 285 | $ mv meta-mymachine/recipes-bsp/formfactor/formfactor/crownbay-noemgd/ \ |
272 | meta-mymachine/recipes-bsp/formfactor/formfactor/mymachine | 286 | meta-mymachine/recipes-bsp/formfactor/formfactor/mymachine |
273 | </literallayout> | 287 | </literallayout> |
274 | </para> | 288 | </para> |
289 | </section> | ||
275 | 290 | ||
276 | <para> | 291 | <section id='changing-recipes-graphics'> |
277 | Now let's look at <filename>recipes-graphics</filename>. | 292 | <title>Changing <filename>recipes-graphics</filename></title> |
278 | For this example we want to remove anything that supports EMGD and | 293 | |
279 | be sure to rename remaining directories appropriately. | 294 | <para> |
280 | The following commands clean up the <filename>recipes-graphics</filename> directory: | 295 | Now let's look at <filename>recipes-graphics</filename>. |
281 | <literallayout class='monospaced'> | 296 | For this example we want to remove anything that supports EMGD and |
297 | be sure to rename remaining directories appropriately. | ||
298 | The following commands clean up the <filename>recipes-graphics</filename> directory: | ||
299 | <literallayout class='monospaced'> | ||
282 | $ rm ‐rf meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-emgd* | 300 | $ rm ‐rf meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-emgd* |
283 | $ rm ‐rf meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-config/crownbay | 301 | $ rm ‐rf meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-config/crownbay |
284 | $ mv meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-config/crownbay-noemgd \ | 302 | $ mv meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-config/crownbay-noemgd \ |
285 | meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-config/mymachine | 303 | meta-mymachine/recipes-graphics/xorg-xserver/xserver-xf86-config/mymachine |
286 | </literallayout> | 304 | </literallayout> |
287 | </para> | 305 | </para> |
288 | 306 | ||
289 | <para> | 307 | <para> |
290 | At this point the <filename>recipes-graphics</filename> directory just has files that | 308 | At this point the <filename>recipes-graphics</filename> directory just has files that |
291 | support Video Electronics Standards Association (VESA) graphics modes and not EMGD. | 309 | support Video Electronics Standards Association (VESA) graphics modes and not EMGD. |
292 | </para> | 310 | </para> |
293 | 311 | </section> | |
294 | <para> | 312 | |
295 | Now let's look at changes in <filename>recipes-core</filename>. | 313 | <section id='changing-recipes-core'> |
296 | The file <filename>task-core-tools.bbappend</filename> in | 314 | <title>Changing <filename>recipes-core</filename></title> |
297 | <filename>recipes-core/tasks</filename> appends the similarly named recipe | 315 | |
298 | located in the local Yocto Project files at | 316 | <para> |
299 | <filename>meta/recipes-core/tasks</filename>. | 317 | Now let's look at changes in <filename>recipes-core</filename>. |
300 | The "append" file in our layer right now is Crown Bay-specific and supports | 318 | The file <filename>task-core-tools.bbappend</filename> in |
301 | EMGD and non-EMGD. | 319 | <filename>recipes-core/tasks</filename> appends the similarly named recipe |
302 | Here are the contents of the file: | 320 | located in the local Yocto Project files at |
303 | <literallayout class='monospaced'> | 321 | <filename>meta/recipes-core/tasks</filename>. |
322 | The "append" file in our layer right now is Crown Bay-specific and supports | ||
323 | EMGD and non-EMGD. | ||
324 | Here are the contents of the file: | ||
325 | <literallayout class='monospaced'> | ||
304 | RRECOMMENDS_task-core-tools-profile_append_crownbay = " systemtap" | 326 | RRECOMMENDS_task-core-tools-profile_append_crownbay = " systemtap" |
305 | RRECOMMENDS_task-core-tools-profile_append_crownbay-noemgd = " systemtap" | 327 | RRECOMMENDS_task-core-tools-profile_append_crownbay-noemgd = " systemtap" |
306 | </literallayout> | 328 | </literallayout> |
307 | </para> | 329 | </para> |
308 | 330 | ||
309 | <para> | 331 | <para> |
310 | The <filename>RRECOMMENDS</filename> statements list packages that | 332 | The <filename>RRECOMMENDS</filename> statements list packages that |
311 | extend usability. | 333 | extend usability. |
312 | The first <filename>RRECOMMENDS</filename> statement can be removed, while the | 334 | The first <filename>RRECOMMENDS</filename> statement can be removed, while the |
313 | second one can be changed to reflect <filename>meta-mymachine</filename>: | 335 | second one can be changed to reflect <filename>meta-mymachine</filename>: |
314 | <literallayout class='monospaced'> | 336 | <literallayout class='monospaced'> |
315 | RRECOMMENDS_task-core-tools-profile_append_mymachine = " systemtap" | 337 | RRECOMMENDS_task-core-tools-profile_append_mymachine = " systemtap" |
316 | </literallayout> | 338 | </literallayout> |
317 | </para> | 339 | </para> |
318 | 340 | </section> | |
319 | <para> | 341 | |
320 | Finally, let's look at <filename>recipes-kernel</filename> changes. | 342 | <section id='changing-recipes-kernel'> |
321 | Recall that the BSP uses the <filename>linux-yocto</filename> kernel as determined | 343 | <title>Changing <filename>recipes-kernel</filename></title> |
322 | earlier in the <filename>mymachine.conf</filename>. | 344 | |
323 | The recipe for that kernel is not located in the | 345 | <para> |
324 | BSP layer but rather in the local Yocto Project files at | 346 | Finally, let's look at <filename>recipes-kernel</filename> changes. |
325 | <filename>meta/recipes-kernel/linux</filename> and is | 347 | Recall that the BSP uses the <filename>linux-yocto</filename> kernel as determined |
326 | named <filename>linux-yocto-2.6.37.bb</filename>. | 348 | earlier in the <filename>mymachine.conf</filename>. |
327 | The <filename>SRCREV_machine</filename> and <filename>SRCREV_meta</filename> | 349 | The recipe for that kernel is not located in the |
328 | statements point to the exact commits used by the Yocto Project development team | 350 | BSP layer but rather in the local Yocto Project files at |
329 | in their source repositories that identify the right kernel for our hardware. | 351 | <filename>meta/recipes-kernel/linux</filename> and is |
330 | </para> | 352 | named <filename>linux-yocto-2.6.37.bb</filename>. |
353 | The <filename>SRCREV_machine</filename> and <filename>SRCREV_meta</filename> | ||
354 | statements point to the exact commits used by the Yocto Project development team | ||
355 | in their source repositories that identify the right kernel for our hardware. | ||
356 | </para> | ||
331 | 357 | ||
332 | <para> | 358 | <para> |
333 | However, in the <filename>meta-mymachine</filename> layer in | 359 | However, in the <filename>meta-mymachine</filename> layer in |
334 | <filename>recipes-kernel/linux</filename> resides a <filename>.bbappend</filename> | 360 | <filename>recipes-kernel/linux</filename> resides a <filename>.bbappend</filename> |
335 | file named <filename>linux-yocto-2.6.37.bbappend</filename> that | 361 | file named <filename>linux-yocto-2.6.37.bbappend</filename> that |
336 | is appended to the recipe of the same name in <filename>meta/recipes-kernel/link</filename>. | 362 | is appended to the recipe of the same name in <filename>meta/recipes-kernel/link</filename>. |
337 | Thus, the <filename>SRCREV</filename> statements in the "append" file override | 363 | Thus, the <filename>SRCREV</filename> statements in the "append" file override |
338 | the more general statements found in <filename>meta</filename>. | 364 | the more general statements found in <filename>meta</filename>. |
339 | </para> | 365 | </para> |
340 | 366 | ||
341 | <para> | 367 | <para> |
342 | The <filename>SRCREV</filename> statements in the "append" file currently identify | 368 | The <filename>SRCREV</filename> statements in the "append" file currently identify |
343 | the kernel that supports the Crown Bay BSP with and without EMGD support. | 369 | the kernel that supports the Crown Bay BSP with and without EMGD support. |
344 | Here are the statements: | 370 | Here are the statements: |
345 | <literallayout class='monospaced'> | 371 | <literallayout class='monospaced'> |
346 | SRCREV_machine_pn-linux-yocto_crownbay ?= \ | 372 | SRCREV_machine_pn-linux-yocto_crownbay ?= \ |
347 | "372c0ab135978bd8ca3a77c88816a25c5ed8f303" | 373 | "372c0ab135978bd8ca3a77c88816a25c5ed8f303" |
348 | SRCREV_meta_pn-linux-yocto_crownbay ?= \ | 374 | SRCREV_meta_pn-linux-yocto_crownbay ?= \ |
@@ -352,74 +378,74 @@ | |||
352 | "372c0ab135978bd8ca3a77c88816a25c5ed8f303" | 378 | "372c0ab135978bd8ca3a77c88816a25c5ed8f303" |
353 | SRCREV_meta_pn-linux-yocto_crownbay-noemgd ?= \ | 379 | SRCREV_meta_pn-linux-yocto_crownbay-noemgd ?= \ |
354 | "d5d3c6480d61f83503ccef7fbcd765f7aca8b71b" | 380 | "d5d3c6480d61f83503ccef7fbcd765f7aca8b71b" |
355 | </literallayout> | 381 | </literallayout> |
356 | </para> | 382 | </para> |
357 | 383 | ||
358 | <para> | 384 | <para> |
359 | You will notice that there are two pairs of <filename>SRCREV</filename> statements. | 385 | You will notice that there are two pairs of <filename>SRCREV</filename> statements. |
360 | The top pair identifies the kernel that supports | 386 | The top pair identifies the kernel that supports |
361 | EMGD, which we don’t care about in this example. | 387 | EMGD, which we don’t care about in this example. |
362 | The bottom pair identifies the kernel that we will use: | 388 | The bottom pair identifies the kernel that we will use: |
363 | <filename>linux-yocto</filename>. | 389 | <filename>linux-yocto</filename>. |
364 | At this point though, the unique commit strings all are still associated with | 390 | At this point though, the unique commit strings all are still associated with |
365 | Crown Bay and not <filename>meta-mymachine</filename>. | 391 | Crown Bay and not <filename>meta-mymachine</filename>. |
366 | </para> | 392 | </para> |
367 | 393 | ||
368 | <para> | 394 | <para> |
369 | To fix this situation in <filename>linux-yocto-2.6.37.bbappend</filename> | 395 | To fix this situation in <filename>linux-yocto-2.6.37.bbappend</filename> |
370 | we delete the two <filename>SRCREV</filename> statements that support | 396 | we delete the two <filename>SRCREV</filename> statements that support |
371 | EMGD (the top pair). | 397 | EMGD (the top pair). |
372 | We also change the remaining pair to specify <filename>mymachine</filename> | 398 | We also change the remaining pair to specify <filename>mymachine</filename> |
373 | and insert the commit identifiers to identify the kernel in which we | 399 | and insert the commit identifiers to identify the kernel in which we |
374 | are interested, which will be based on the <filename>atom-pc-standard</filename> | 400 | are interested, which will be based on the <filename>atom-pc-standard</filename> |
375 | kernel. | 401 | kernel. |
376 | Here are the final <filename>SRCREV</filename> statements: | 402 | Here are the final <filename>SRCREV</filename> statements: |
377 | <literallayout class='monospaced'> | 403 | <literallayout class='monospaced'> |
378 | SRCREV_machine_pn-linux-yocto-_mymachine ?= \ | 404 | SRCREV_machine_pn-linux-yocto-_mymachine ?= \ |
379 | "fce17f046d3756045e4dfb49221d1cf60fcae329" | 405 | "fce17f046d3756045e4dfb49221d1cf60fcae329" |
380 | SRCREV_meta_pn-linux-yocto-stable_mymachine ?= \ | 406 | SRCREV_meta_pn-linux-yocto-stable_mymachine ?= \ |
381 | "84f1a422d7e21fbc23a687035bdf9d42471f19e0" | 407 | "84f1a422d7e21fbc23a687035bdf9d42471f19e0" |
382 | </literallayout> | 408 | </literallayout> |
383 | </para> | 409 | </para> |
384 | 410 | ||
385 | <para> | 411 | <para> |
386 | If you are familiar with Git repositories you probably won’t have trouble locating the | 412 | If you are familiar with Git repositories you probably won’t have trouble locating the |
387 | exact commit strings in the Yocto Project source repositories you need to change | 413 | exact commit strings in the Yocto Project source repositories you need to change |
388 | the <filename>SRCREV</filename> statements. | 414 | the <filename>SRCREV</filename> statements. |
389 | You can find all the <filename>machine</filename> and <filename>meta</filename> | 415 | You can find all the <filename>machine</filename> and <filename>meta</filename> |
390 | branch points (commits) for the <filename>linux-yocto-2.6.37</filename> kernel | 416 | branch points (commits) for the <filename>linux-yocto-2.6.37</filename> kernel |
391 | <ulink url='http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto-2.6.37'>here</ulink>. | 417 | <ulink url='http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto-2.6.37'>here</ulink>. |
392 | </para> | 418 | </para> |
393 | 419 | ||
394 | <para> | 420 | <para> |
395 | If you need a little more assistance after going to the link then do the following: | 421 | If you need a little more assistance after going to the link then do the following: |
396 | <orderedlist> | 422 | <orderedlist> |
397 | <listitem><para>Expand the list of branches by clicking <filename>[…]</filename></para></listitem> | 423 | <listitem><para>Expand the list of branches by clicking <filename>[…]</filename></para></listitem> |
398 | <listitem><para>Click on the <filename>yocto/standard/common-pc/atom-pc</filename> | 424 | <listitem><para>Click on the <filename>yocto/standard/common-pc/atom-pc</filename> |
399 | branch</para></listitem> | 425 | branch</para></listitem> |
400 | <listitem><para>Click on the commit column header to view the top commit</para></listitem> | 426 | <listitem><para>Click on the commit column header to view the top commit</para></listitem> |
401 | <listitem><para>Copy the commit string for use in the | 427 | <listitem><para>Copy the commit string for use in the |
402 | <filename>linux-yocto-2.6.37.bbappend</filename> file</para></listitem> | 428 | <filename>linux-yocto-2.6.37.bbappend</filename> file</para></listitem> |
403 | </orderedlist> | 429 | </orderedlist> |
404 | </para> | 430 | </para> |
405 | 431 | ||
406 | <para> | 432 | <para> |
407 | For the <filename>SRCREV</filename> statement that points to the <filename>meta</filename> | 433 | For the <filename>SRCREV</filename> statement that points to the <filename>meta</filename> |
408 | branch use the same procedure except expand the <filename>meta</filename> | 434 | branch use the same procedure except expand the <filename>meta</filename> |
409 | branch in step 2 above. | 435 | branch in step 2 above. |
410 | </para> | 436 | </para> |
411 | 437 | ||
412 | <para> | 438 | <para> |
413 | Also in the <filename>linux-yocto-2.6.37.bbappend</filename> file are | 439 | Also in the <filename>linux-yocto-2.6.37.bbappend</filename> file are |
414 | <filename>COMPATIBLE_MACHINE</filename>, <filename>KMACHINE</filename>, | 440 | <filename>COMPATIBLE_MACHINE</filename>, <filename>KMACHINE</filename>, |
415 | and <filename>KERNEL_FEATURES</filename> statements. | 441 | and <filename>KERNEL_FEATURES</filename> statements. |
416 | Two sets of these exist: one set supports EMGD and one set does not. | 442 | Two sets of these exist: one set supports EMGD and one set does not. |
417 | Because we are not interested in supporting EMGD those three can be deleted. | 443 | Because we are not interested in supporting EMGD those three can be deleted. |
418 | The remaining three must be changed so that <filename>mymachine</filename> replaces | 444 | The remaining three must be changed so that <filename>mymachine</filename> replaces |
419 | <filename>crownbay-noemgd</filename> and <filename>crownbay</filename>. | 445 | <filename>crownbay-noemgd</filename> and <filename>crownbay</filename>. |
420 | Here is the final <filename>linux-yocto-2.6.37.bbappend</filename> file after all | 446 | Here is the final <filename>linux-yocto-2.6.37.bbappend</filename> file after all |
421 | the edits: | 447 | the edits: |
422 | <literallayout class='monospaced'> | 448 | <literallayout class='monospaced'> |
423 | FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" | 449 | FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" |
424 | 450 | ||
425 | COMPATIBLE_MACHINE_mymachine = "mymachine" | 451 | COMPATIBLE_MACHINE_mymachine = "mymachine" |
@@ -430,24 +456,30 @@ | |||
430 | "fce17f046d3756045e4dfb49221d1cf60fcae329" | 456 | "fce17f046d3756045e4dfb49221d1cf60fcae329" |
431 | SRCREV_meta_pn-linux-yocto_mymachine ?= \ | 457 | SRCREV_meta_pn-linux-yocto_mymachine ?= \ |
432 | "84f1a422d7e21fbc23a687035bdf9d42471f19e0" | 458 | "84f1a422d7e21fbc23a687035bdf9d42471f19e0" |
433 | </literallayout> | 459 | </literallayout> |
434 | </para> | 460 | </para> |
435 | 461 | </section> | |
436 | <para> | 462 | </section> |
437 | In summary, the edits to the layer’s recipe files result in removal of any files and | 463 | |
438 | statements that do not support your targeted hardware in addition to the inclusion | 464 | <section id='bsp-recipe-change-summary'> |
439 | of any new recipes you might need. | 465 | <title>BSP Recipe Change Summary</title> |
440 | In this example, it was simply a matter of ridding the new layer | 466 | |
441 | <filename>meta-machine</filename> of any code that supported the EMGD features | 467 | <para> |
442 | and making sure we were identifying the kernel that supports our example, which | 468 | In summary, the edits to the layer’s recipe files result in removal of any files and |
443 | is the <filename>atom-pc-standard</filename> kernel. | 469 | statements that do not support your targeted hardware in addition to the inclusion |
444 | We did not introduce any new recipes to the layer. | 470 | of any new recipes you might need. |
445 | </para> | 471 | In this example, it was simply a matter of ridding the new layer |
446 | 472 | <filename>meta-machine</filename> of any code that supported the EMGD features | |
447 | <para> | 473 | and making sure we were identifying the kernel that supports our example, which |
448 | Finally, it is also important to update the layer’s <filename>README</filename> | 474 | is the <filename>atom-pc-standard</filename> kernel. |
449 | file so that the information in it reflects your BSP. | 475 | We did not introduce any new recipes to the layer. |
450 | </para> | 476 | </para> |
477 | |||
478 | <para> | ||
479 | Finally, it is also important to update the layer’s <filename>README</filename> | ||
480 | file so that the information in it reflects your BSP. | ||
481 | </para> | ||
482 | </section> | ||
451 | </section> | 483 | </section> |
452 | 484 | ||
453 | <section id='preparing-for-the-build-app'> | 485 | <section id='preparing-for-the-build-app'> |