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   1 From c46811a3b0e0fb76015ac956172e40bce4e6d9b3 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <pelwell@users.noreply.github.com>
   3 Date: Fri, 5 Jul 2019 14:49:22 +0100
   4 Subject: [PATCH] overlays: Rename pi3- overlays to be less
   5  model-specific (#3052)
   6
   7 Rename the various pi3- overlays to be more generic, listing
   8 the devices they apply to in the README. The original names are
   9 retained for backwards compatibility as files that just include
  10 the new versions - the README marks them as being deprecated.
  11
  12 See: https://github.com/raspberrypi/firmware/issues/1174
  13
  14 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  15 ---
  16  arch/arm/boot/dts/overlays/Makefile           |  4 +
  17  arch/arm/boot/dts/overlays/README             | 97 ++++++++++++-------
  18  .../arm/boot/dts/overlays/act-led-overlay.dts | 27 ++++++
  19  .../boot/dts/overlays/disable-bt-overlay.dts  | 55 +++++++++++
  20  .../dts/overlays/disable-wifi-overlay.dts     | 20 ++++
  21  .../boot/dts/overlays/miniuart-bt-overlay.dts | 74 ++++++++++++++
  22  .../boot/dts/overlays/pi3-act-led-overlay.dts | 28 +-----
  23  .../dts/overlays/pi3-disable-bt-overlay.dts   | 56 +----------
  24  .../dts/overlays/pi3-disable-wifi-overlay.dts | 21 +---
  25  .../dts/overlays/pi3-miniuart-bt-overlay.dts  | 75 +-------------
  26  10 files changed, 246 insertions(+), 211 deletions(-)
  27  create mode 100644 arch/arm/boot/dts/overlays/act-led-overlay.dts
  28  create mode 100644 arch/arm/boot/dts/overlays/disable-bt-overlay.dts
  29  create mode 100644 arch/arm/boot/dts/overlays/disable-wifi-overlay.dts
  30  create mode 100644 arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts
  31
  32 --- a/arch/arm/boot/dts/overlays/Makefile
  33 +++ b/arch/arm/boot/dts/overlays/Makefile
  34 @@ -1,6 +1,7 @@
  35  # Overlays for the Raspberry Pi platform
  36
  37  dtbo-$(CONFIG_ARCH_BCM2835) += \
  38 +       act-led.dtbo \
  39         adau1977-adc.dtbo \
  40         adau7002-simple.dtbo \
  41         ads1015.dtbo \
  42 @@ -26,6 +27,8 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  43         dht11.dtbo \
  44         dionaudio-loco.dtbo \
  45         dionaudio-loco-v2.dtbo \
  46 +       disable-bt.dtbo \
  47 +       disable-wifi.dtbo \
  48         dpi18.dtbo \
  49         dpi24.dtbo \
  50         draws.dtbo \
  51 @@ -91,6 +94,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  52         media-center.dtbo \
  53         midi-uart0.dtbo \
  54         midi-uart1.dtbo \
  55 +       miniuart-bt.dtbo \
  56         mmc.dtbo \
  57         mpu6050.dtbo \
  58         mz61581.dtbo \
  59 --- a/arch/arm/boot/dts/overlays/README
  60 +++ b/arch/arm/boot/dts/overlays/README
  61 @@ -180,14 +180,16 @@ Params:
  62
  63          act_led_activelow       Set to "on" to invert the sense of the LED
  64                                  (default "off")
  65 -                                N.B. For Pi3 see pi3-act-led overlay.
  66 +                                N.B. For Pi 3B, 3B+, 3A+ and 4B, use the act-led
  67 +                                overlay.
  68
  69          act_led_gpio            Set which GPIO to use for the activity LED
  70                                  (in case you want to connect it to an external
  71                                  device)
  72                                  (default "16" on a non-Plus board, "47" on a
  73                                  Plus or Pi 2)
  74 -                                N.B. For Pi3 see pi3-act-led overlay.
  75 +                                N.B. For Pi 3B, 3B+, 3A+ and 4B, use the act-led
  76 +                                overlay.
  77
  78          pwr_led_trigger
  79          pwr_led_activelow
  80 @@ -205,6 +207,23 @@ Params:
  81          and the other i2c baudrate parameters.
  82
  83
  84 +Name:   act-led
  85 +Info:   Pi 3B, 3B+, 3A+ and 4B use a GPIO expander to drive the LEDs which can
  86 +        only be accessed from the VPU. There is a special driver for this with a
  87 +        separate DT node, which has the unfortunate consequence of breaking the
  88 +        act_led_gpio and act_led_activelow dtparams.
  89 +        This overlay changes the GPIO controller back to the standard one and
  90 +        restores the dtparams.
  91 +Load:   dtoverlay=act-led,<param>=<val>
  92 +Params: activelow               Set to "on" to invert the sense of the LED
  93 +                                (default "off")
  94 +
  95 +        gpio                    Set which GPIO to use for the activity LED
  96 +                                (in case you want to connect it to an external
  97 +                                device)
  98 +                                REQUIRED
  99 +
 100 +
 101  Name:   adau1977-adc
 102  Info:   Overlay for activation of ADAU1977 ADC codec over I2C for control
 103          and I2S for data.
 104 @@ -509,6 +528,21 @@ Params: 24db_digital_gain       Allow ga
 105                                  that does not result in clipping/distortion!)
 106
 107
 108 +Name:   disable-bt
 109 +Info:   Disable onboard Bluetooth on Pi 3B, 3B+, 3A+, 4B and Zero W, restoring
 110 +        UART0/ttyAMA0 over GPIOs 14 & 15.
 111 +        N.B. To disable the systemd service that initialises the modem so it
 112 +        doesn't use the UART, use 'sudo systemctl disable hciuart'.
 113 +Load:   dtoverlay=disable-bt
 114 +Params: <None>
 115 +
 116 +
 117 +Name:   disable-wifi
 118 +Info:   Disable onboard WiFi on Pi 3B, 3B+, 3A+, 4B and Zero W.
 119 +Load:   dtoverlay=disable-wifi
 120 +Params: <None>
 121 +
 122 +
 123  Name:   dpi18
 124  Info:   Overlay for a generic 18-bit DPI display
 125          This uses GPIOs 0-21 (so no I2C, uart etc.), and activates the output
 126 @@ -1447,6 +1481,20 @@ Load:   dtoverlay=midi-uart1
 127  Params: <None>
 128
 129
 130 +Name:   miniuart-bt
 131 +Info:   Switch the onboard Bluetooth function on Pi 3B, 3B+, 3A+, 4B and Zero W
 132 +        to use the mini-UART (ttyS0) and restore UART0/ttyAMA0 over GPIOs 14 &
 133 +        15. Note that this may reduce the maximum usable baudrate.
 134 +        N.B. It is also necessary to edit /lib/systemd/system/hciuart.service
 135 +        and replace ttyAMA0 with ttyS0, unless using Raspbian or another
 136 +        distribution with udev rules that create /dev/serial0 and /dev/serial1,
 137 +        in which case use /dev/serial1 instead because it will always be
 138 +        correct. Furthermore, you must also set core_freq and core_freq_min to
 139 +        the same value in config.txt or the miniuart will not work.
 140 +Load:   dtoverlay=miniuart-bt
 141 +Params: <None>
 142 +
 143 +
 144  Name:   mmc
 145  Info:   Selects the bcm2835-mmc SD/MMC driver, optionally with overclock
 146  Load:   dtoverlay=mmc,<param>=<val>
 147 @@ -1509,48 +1557,27 @@ Params: panel                   Display
 148
 149
 150  Name:   pi3-act-led
 151 -Info:   Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
 152 -        from the VPU. There is a special driver for this with a separate DT
 153 -        node, which has the unfortunate consequence of breaking the
 154 -        act_led_gpio and act_led_activelow dtparams.
 155 -        This overlay changes the GPIO controller back to the standard one and
 156 -        restores the dtparams.
 157 -Load:   dtoverlay=pi3-act-led,<param>=<val>
 158 -Params: activelow               Set to "on" to invert the sense of the LED
 159 -                                (default "off")
 160 -
 161 -        gpio                    Set which GPIO to use for the activity LED
 162 -                                (in case you want to connect it to an external
 163 -                                device)
 164 -                                REQUIRED
 165 +Info:   This overlay has been renamed act-led, keeping pi3-act-led as an alias
 166 +        for backwards compatibility.
 167 +Load:   <Deprecated>
 168
 169
 170  Name:   pi3-disable-bt
 171 -Info:   Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
 172 -        N.B. To disable the systemd service that initialises the modem so it
 173 -        doesn't use the UART, use 'sudo systemctl disable hciuart'.
 174 -Load:   dtoverlay=pi3-disable-bt
 175 -Params: <None>
 176 +Info:   This overlay has been renamed disable-bt, keeping pi3-disable-bt as an
 177 +        alias for backwards compatibility.
 178 +Load:   <Deprecated>
 179
 180
 181  Name:   pi3-disable-wifi
 182 -Info:   Disable Pi3 onboard WiFi
 183 -Load:   dtoverlay=pi3-disable-wifi
 184 -Params: <None>
 185 +Info:   This overlay has been renamed disable-wifi, keeping pi3-disable-wifi as
 186 +        an alias for backwards compatibility.
 187 +Load:   <Deprecated>
 188
 189
 190  Name:   pi3-miniuart-bt
 191 -Info:   Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
 192 -        UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
 193 -        usable baudrate.
 194 -        N.B. It is also necessary to edit /lib/systemd/system/hciuart.service
 195 -        and replace ttyAMA0 with ttyS0, unless you have a system with udev rules
 196 -        that create /dev/serial0 and /dev/serial1, in which case use
 197 -        /dev/serial1 instead because it will always be correct. Furthermore,
 198 -        you must also set core_freq=250 in config.txt or the miniuart will not
 199 -        work.
 200 -Load:   dtoverlay=pi3-miniuart-bt
 201 -Params: <None>
 202 +Info:   This overlay has been renamed miniuart-bt, keeping pi3-miniuart-bt as
 203 +        an alias for backwards compatibility.
 204 +Load:   <Deprecated>
 205
 206
 207  Name:   pibell
 208 --- /dev/null
 209 +++ b/arch/arm/boot/dts/overlays/act-led-overlay.dts
 210 @@ -0,0 +1,27 @@
 211 +/dts-v1/;
 212 +/plugin/;
 213 +
 214 +/* Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
 215 +   from the VPU. There is a special driver for this with a separate DT node,
 216 +   which has the unfortunate consequence of breaking the act_led_gpio and
 217 +   act_led_activelow dtparams.
 218 +
 219 +   This overlay changes the GPIO controller back to the standard one and
 220 +   restores the dtparams.
 221 +*/
 222 +
 223 +/{
 224 +       compatible = "brcm,bcm2835";
 225 +
 226 +       fragment@0 {
 227 +               target = <&act_led>;
 228 +               frag0: __overlay__ {
 229 +                       gpios = <&gpio 0 0>;
 230 +               };
 231 +       };
 232 +
 233 +       __overrides__ {
 234 +               gpio = <&frag0>,"gpios:4";
 235 +               activelow = <&frag0>,"gpios:8";
 236 +       };
 237 +};
 238 --- /dev/null
 239 +++ b/arch/arm/boot/dts/overlays/disable-bt-overlay.dts
 240 @@ -0,0 +1,55 @@
 241 +/dts-v1/;
 242 +/plugin/;
 243 +
 244 +/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
 245 +   To disable the systemd service that initialises the modem so it doesn't use
 246 +   the UART:
 247 +
 248 +       sudo systemctl disable hciuart
 249 +*/
 250 +
 251 +/{
 252 +       compatible = "brcm,bcm2835";
 253 +
 254 +       fragment@0 {
 255 +               target = <&uart1>;
 256 +               __overlay__ {
 257 +                       status = "disabled";
 258 +               };
 259 +       };
 260 +
 261 +       fragment@1 {
 262 +               target = <&uart0>;
 263 +               __overlay__ {
 264 +                       pinctrl-names = "default";
 265 +                       pinctrl-0 = <&uart0_pins>;
 266 +                       status = "okay";
 267 +               };
 268 +       };
 269 +
 270 +       fragment@2 {
 271 +               target = <&uart0_pins>;
 272 +               __overlay__ {
 273 +                       brcm,pins;
 274 +                       brcm,function;
 275 +                       brcm,pull;
 276 +               };
 277 +       };
 278 +
 279 +       fragment@3 {
 280 +               target = <&bt_pins>;
 281 +               __overlay__ {
 282 +                       brcm,pins;
 283 +                       brcm,function;
 284 +                       brcm,pull;
 285 +               };
 286 +       };
 287 +
 288 +       fragment@4 {
 289 +               target-path = "/aliases";
 290 +               __overlay__ {
 291 +                       serial0 = "/soc/serial@7e201000";
 292 +                       serial1 = "/soc/serial@7e215040";
 293 +               };
 294 +       };
 295 +};
 296 --- /dev/null
 297 +++ b/arch/arm/boot/dts/overlays/disable-wifi-overlay.dts
 298 @@ -0,0 +1,20 @@
 299 +/dts-v1/;
 300 +/plugin/;
 301 +
 302 +/{
 303 +       compatible = "brcm,bcm2835";
 304 +
 305 +       fragment@0 {
 306 +               target = <&mmc>;
 307 +               __overlay__ {
 308 +                       status = "disabled";
 309 +               };
 310 +       };
 311 +
 312 +       fragment@1 {
 313 +               target = <&mmcnr>;
 314 +               __overlay__ {
 315 +                       status = "disabled";
 316 +               };
 317 +       };
 318 +};
 319 --- /dev/null
 320 +++ b/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts
 321 @@ -0,0 +1,74 @@
 322 +/dts-v1/;
 323 +/plugin/;
 324 +
 325 +/* Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
 326 +   UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
 327 +   usable baudrate.
 328 +
 329 +   It is also necessary to edit /lib/systemd/system/hciuart.service and
 330 +   replace ttyAMA0 with ttyS0, unless you have a system with udev rules
 331 +   that create /dev/serial0 and /dev/serial1, in which case use /dev/serial1
 332 +   instead because it will always be correct.
 333 +
 334 +   If cmdline.txt uses the alias serial0 to refer to the user-accessable port
 335 +   then the firmware will replace with the appropriate port whether or not
 336 +   this overlay is used.
 337 +*/
 338 +
 339 +/{
 340 +       compatible = "brcm,bcm2835";
 341 +
 342 +       fragment@0 {
 343 +               target = <&uart0>;
 344 +               __overlay__ {
 345 +                       pinctrl-names = "default";
 346 +                       pinctrl-0 = <&uart0_pins>;
 347 +                       status = "okay";
 348 +               };
 349 +       };
 350 +
 351 +       fragment@1 {
 352 +               target = <&uart1>;
 353 +               __overlay__ {
 354 +                       pinctrl-names = "default";
 355 +                       pinctrl-0 = <&uart1_pins &bt_pins &fake_bt_cts>;
 356 +                       status = "okay";
 357 +               };
 358 +       };
 359 +
 360 +       fragment@2 {
 361 +               target = <&uart0_pins>;
 362 +               __overlay__ {
 363 +                       brcm,pins;
 364 +                       brcm,function;
 365 +                       brcm,pull;
 366 +               };
 367 +       };
 368 +
 369 +       fragment@3 {
 370 +               target = <&uart1_pins>;
 371 +               __overlay__ {
 372 +                       brcm,pins = <32 33>;
 373 +                       brcm,function = <2>; /* alt5=UART1 */
 374 +                       brcm,pull = <0 2>;
 375 +               };
 376 +       };
 377 +
 378 +       fragment@4 {
 379 +               target = <&gpio>;
 380 +               __overlay__ {
 381 +                       fake_bt_cts: fake_bt_cts {
 382 +                               brcm,pins = <31>;
 383 +                               brcm,function = <1>; /* output */
 384 +                       };
 385 +               };
 386 +       };
 387 +
 388 +       fragment@5 {
 389 +               target-path = "/aliases";
 390 +               __overlay__ {
 391 +                       serial0 = "/soc/serial@7e201000";
 392 +                       serial1 = "/soc/serial@7e215040";
 393 +               };
 394 +       };
 395 +};
 396 --- a/arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts
 397 +++ b/arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts
 398 @@ -1,27 +1 @@
 399 -/dts-v1/;
 400 -/plugin/;
 401 -
 402 -/* Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
 403 -   from the VPU. There is a special driver for this with a separate DT node,
 404 -   which has the unfortunate consequence of breaking the act_led_gpio and
 405 -   act_led_activelow dtparams.
 406 -
 407 -   This overlay changes the GPIO controller back to the standard one and
 408 -   restores the dtparams.
 409 -*/
 410 -
 411 -/{
 412 -       compatible = "brcm,bcm2835";
 413 -
 414 -       fragment@0 {
 415 -               target = <&act_led>;
 416 -               frag0: __overlay__ {
 417 -                       gpios = <&gpio 0 0>;
 418 -               };
 419 -       };
 420 -
 421 -       __overrides__ {
 422 -               gpio = <&frag0>,"gpios:4";
 423 -               activelow = <&frag0>,"gpios:8";
 424 -       };
 425 -};
 426 +#include "act-led-overlay.dts"
 427 --- a/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
 428 +++ b/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
 429 @@ -1,55 +1 @@
 430 -/dts-v1/;
 431 -/plugin/;
 432 -
 433 -/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
 434 -   To disable the systemd service that initialises the modem so it doesn't use
 435 -   the UART:
 436 -
 437 -       sudo systemctl disable hciuart
 438 -*/
 439 -
 440 -/{
 441 -       compatible = "brcm,bcm2835";
 442 -
 443 -       fragment@0 {
 444 -               target = <&uart1>;
 445 -               __overlay__ {
 446 -                       status = "disabled";
 447 -               };
 448 -       };
 449 -
 450 -       fragment@1 {
 451 -               target = <&uart0>;
 452 -               __overlay__ {
 453 -                       pinctrl-names = "default";
 454 -                       pinctrl-0 = <&uart0_pins>;
 455 -                       status = "okay";
 456 -               };
 457 -       };
 458 -
 459 -       fragment@2 {
 460 -               target = <&uart0_pins>;
 461 -               __overlay__ {
 462 -                       brcm,pins;
 463 -                       brcm,function;
 464 -                       brcm,pull;
 465 -               };
 466 -       };
 467 -
 468 -       fragment@3 {
 469 -               target = <&bt_pins>;
 470 -               __overlay__ {
 471 -                       brcm,pins;
 472 -                       brcm,function;
 473 -                       brcm,pull;
 474 -               };
 475 -       };
 476 -
 477 -       fragment@4 {
 478 -               target-path = "/aliases";
 479 -               __overlay__ {
 480 -                       serial0 = "/soc/serial@7e201000";
 481 -                       serial1 = "/soc/serial@7e215040";
 482 -               };
 483 -       };
 484 -};
 485 +#include "disable-bt-overlay.dts"
 486 --- a/arch/arm/boot/dts/overlays/pi3-disable-wifi-overlay.dts
 487 +++ b/arch/arm/boot/dts/overlays/pi3-disable-wifi-overlay.dts
 488 @@ -1,20 +1 @@
 489 -/dts-v1/;
 490 -/plugin/;
 491 -
 492 -/{
 493 -       compatible = "brcm,bcm2835";
 494 -
 495 -       fragment@0 {
 496 -               target = <&mmc>;
 497 -               __overlay__ {
 498 -                       status = "disabled";
 499 -               };
 500 -       };
 501 -
 502 -       fragment@1 {
 503 -               target = <&mmcnr>;
 504 -               __overlay__ {
 505 -                       status = "disabled";
 506 -               };
 507 -       };
 508 -};
 509 +#include "disable-wifi-overlay.dts"
 510 --- a/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
 511 +++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
 512 @@ -1,74 +1 @@
 513 -/dts-v1/;
 514 -/plugin/;
 515 -
 516 -/* Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
 517 -   UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
 518 -   usable baudrate.
 519 -
 520 -   It is also necessary to edit /lib/systemd/system/hciuart.service and
 521 -   replace ttyAMA0 with ttyS0, unless you have a system with udev rules
 522 -   that create /dev/serial0 and /dev/serial1, in which case use /dev/serial1
 523 -   instead because it will always be correct.
 524 -
 525 -   If cmdline.txt uses the alias serial0 to refer to the user-accessable port
 526 -   then the firmware will replace with the appropriate port whether or not
 527 -   this overlay is used.
 528 -*/
 529 -
 530 -/{
 531 -       compatible = "brcm,bcm2835";
 532 -
 533 -       fragment@0 {
 534 -               target = <&uart0>;
 535 -               __overlay__ {
 536 -                       pinctrl-names = "default";
 537 -                       pinctrl-0 = <&uart0_pins>;
 538 -                       status = "okay";
 539 -               };
 540 -       };
 541 -
 542 -       fragment@1 {
 543 -               target = <&uart1>;
 544 -               __overlay__ {
 545 -                       pinctrl-names = "default";
 546 -                       pinctrl-0 = <&uart1_pins &bt_pins &fake_bt_cts>;
 547 -                       status = "okay";
 548 -               };
 549 -       };
 550 -
 551 -       fragment@2 {
 552 -               target = <&uart0_pins>;
 553 -               __overlay__ {
 554 -                       brcm,pins;
 555 -                       brcm,function;
 556 -                       brcm,pull;
 557 -               };
 558 -       };
 559 -
 560 -       fragment@3 {
 561 -               target = <&uart1_pins>;
 562 -               __overlay__ {
 563 -                       brcm,pins = <32 33>;
 564 -                       brcm,function = <2>; /* alt5=UART1 */
 565 -                       brcm,pull = <0 2>;
 566 -               };
 567 -       };
 568 -
 569 -       fragment@4 {
 570 -               target = <&gpio>;
 571 -               __overlay__ {
 572 -                       fake_bt_cts: fake_bt_cts {
 573 -                               brcm,pins = <31>;
 574 -                               brcm,function = <1>; /* output */
 575 -                       };
 576 -               };
 577 -       };
 578 -
 579 -       fragment@5 {
 580 -               target-path = "/aliases";
 581 -               __overlay__ {
 582 -                       serial0 = "/soc/serial@7e201000";
 583 -                       serial1 = "/soc/serial@7e215040";
 584 -               };
 585 -       };
 586 -};
 587 +#include "miniuart-bt-overlay.dts"