target/linux/bcm27xx/patches-5.4/950-0658-dt-Implement-an-I2C-pinctrl-mux-for-BSC0.patch

   1 From 77d7427bed21c92d1c10e0cc9beabb5ce9bb6c0b Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 9 Apr 2020 12:46:13 +0100
   4 Subject: [PATCH] dt: Implement an I2C pinctrl mux for BSC0.
   5
   6 BSC0 serves either the HAT EEPROM pins on the 40pin connector,
   7 or the display and camera on a board specific pairing of either
   8 GPIO 28&29, or 44&45.
   9
  10 Use I2C_MUX_PINCTRL to allow exposing both pairs of pins as I2C
  11 busses.
  12
  13 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  14 ---
  15  arch/arm/boot/dts/bcm2708-rpi-b-plus.dts      |  9 ++++---
  16  arch/arm/boot/dts/bcm2708-rpi-b.dts           |  9 ++++---
  17  arch/arm/boot/dts/bcm2708-rpi-cm.dts          |  9 ++++---
  18  arch/arm/boot/dts/bcm2708-rpi-zero-w.dts      |  9 ++++---
  19  arch/arm/boot/dts/bcm2708-rpi-zero.dts        |  9 ++++---
  20  arch/arm/boot/dts/bcm2709-rpi-2-b.dts         |  9 ++++---
  21  arch/arm/boot/dts/bcm270x-rpi.dtsi            |  7 ++---
  22  arch/arm/boot/dts/bcm2710-rpi-2-b.dts         |  9 ++++---
  23  arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts    |  9 ++++---
  24  arch/arm/boot/dts/bcm2710-rpi-3-b.dts         |  9 ++++---
  25  arch/arm/boot/dts/bcm2710-rpi-cm3.dts         | 10 ++++---
  26  arch/arm/boot/dts/bcm2711-rpi-4-b.dts         |  5 ++--
  27  arch/arm/boot/dts/bcm2711.dtsi                |  2 +-
  28  .../boot/dts/bcm283x-rpi-i2c0mux_0_28.dtsi    |  4 +++
  29  .../boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi    |  4 +++
  30  arch/arm/boot/dts/bcm283x.dtsi                | 26 ++++++++++++++++++-
  31  16 files changed, 100 insertions(+), 39 deletions(-)
  32  create mode 100644 arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_28.dtsi
  33  create mode 100644 arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi
  34
  35 --- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
  36 +++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
  37 @@ -4,6 +4,7 @@
  38  #include "bcm2708-rpi.dtsi"
  39  #include "bcm283x-rpi-smsc9514.dtsi"
  40  #include "bcm283x-rpi-csi1-2lane.dtsi"
  41 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
  42
  43  / {
  44         compatible = "raspberrypi,model-b-plus", "brcm,bcm2835";
  45 @@ -68,12 +69,14 @@
  46         };
  47  };
  48
  49 -&i2c0 {
  50 -       pinctrl-names = "default";
  51 -       pinctrl-0 = <&i2c0_pins>;
  52 +&i2c0if {
  53         clock-frequency = <100000>;
  54  };
  55
  56 +&i2c0mux {
  57 +       pinctrl-0 = <&i2c0_pins>;
  58 +};
  59 +
  60  &i2c1 {
  61         pinctrl-names = "default";
  62         pinctrl-0 = <&i2c1_pins>;
  63 --- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
  64 +++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
  65 @@ -4,6 +4,7 @@
  66  #include "bcm2708-rpi.dtsi"
  67  #include "bcm283x-rpi-smsc9512.dtsi"
  68  #include "bcm283x-rpi-csi1-2lane.dtsi"
  69 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
  70
  71  / {
  72         compatible = "raspberrypi,model-b", "brcm,bcm2835";
  73 @@ -68,12 +69,14 @@
  74         };
  75  };
  76
  77 -&i2c0 {
  78 -       pinctrl-names = "default";
  79 -       pinctrl-0 = <&i2c0_pins>;
  80 +&i2c0if {
  81         clock-frequency = <100000>;
  82  };
  83
  84 +&i2c0mux {
  85 +       pinctrl-0 = <&i2c0_pins>;
  86 +};
  87 +
  88  &i2c1 {
  89         pinctrl-names = "default";
  90         pinctrl-0 = <&i2c1_pins>;
  91 --- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts
  92 +++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts
  93 @@ -3,6 +3,7 @@
  94  #include "bcm2708-rpi-cm.dtsi"
  95  #include "bcm283x-rpi-csi0-2lane.dtsi"
  96  #include "bcm283x-rpi-csi1-4lane.dtsi"
  97 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
  98
  99  / {
 100         compatible = "raspberrypi,compute-module", "brcm,bcm2835";
 101 @@ -67,12 +68,14 @@
 102         };
 103  };
 104
 105 -&i2c0 {
 106 -       pinctrl-names = "default";
 107 -       pinctrl-0 = <&i2c0_pins>;
 108 +&i2c0if {
 109         clock-frequency = <100000>;
 110  };
 111
 112 +&i2c0mux {
 113 +       pinctrl-0 = <&i2c0_pins>;
 114 +};
 115 +
 116  &i2c1 {
 117         pinctrl-names = "default";
 118         pinctrl-0 = <&i2c1_pins>;
 119 --- a/arch/arm/boot/dts/bcm2708-rpi-zero-w.dts
 120 +++ b/arch/arm/boot/dts/bcm2708-rpi-zero-w.dts
 121 @@ -3,6 +3,7 @@
 122  #include "bcm2708.dtsi"
 123  #include "bcm2708-rpi.dtsi"
 124  #include "bcm283x-rpi-csi1-2lane.dtsi"
 125 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
 126
 127  / {
 128         compatible = "raspberrypi,model-zero-w", "brcm,bcm2835";
 129 @@ -116,12 +117,14 @@
 130         };
 131  };
 132
 133 -&i2c0 {
 134 -       pinctrl-names = "default";
 135 -       pinctrl-0 = <&i2c0_pins>;
 136 +&i2c0if {
 137         clock-frequency = <100000>;
 138  };
 139
 140 +&i2c0mux {
 141 +       pinctrl-0 = <&i2c0_pins>;
 142 +};
 143 +
 144  &i2c1 {
 145         pinctrl-names = "default";
 146         pinctrl-0 = <&i2c1_pins>;
 147 --- a/arch/arm/boot/dts/bcm2708-rpi-zero.dts
 148 +++ b/arch/arm/boot/dts/bcm2708-rpi-zero.dts
 149 @@ -3,6 +3,7 @@
 150  #include "bcm2708.dtsi"
 151  #include "bcm2708-rpi.dtsi"
 152  #include "bcm283x-rpi-csi1-2lane.dtsi"
 153 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
 154
 155  / {
 156         compatible = "raspberrypi,model-zero", "brcm,bcm2835";
 157 @@ -71,12 +72,14 @@
 158         };
 159  };
 160
 161 -&i2c0 {
 162 -       pinctrl-names = "default";
 163 -       pinctrl-0 = <&i2c0_pins>;
 164 +&i2c0if {
 165         clock-frequency = <100000>;
 166  };
 167
 168 +&i2c0mux {
 169 +       pinctrl-0 = <&i2c0_pins>;
 170 +};
 171 +
 172  &i2c1 {
 173         pinctrl-names = "default";
 174         pinctrl-0 = <&i2c1_pins>;
 175 --- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
 176 +++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
 177 @@ -4,6 +4,7 @@
 178  #include "bcm2709-rpi.dtsi"
 179  #include "bcm283x-rpi-smsc9514.dtsi"
 180  #include "bcm283x-rpi-csi1-2lane.dtsi"
 181 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
 182
 183  / {
 184         compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
 185 @@ -68,12 +69,14 @@
 186         };
 187  };
 188
 189 -&i2c0 {
 190 -       pinctrl-names = "default";
 191 -       pinctrl-0 = <&i2c0_pins>;
 192 +&i2c0if {
 193         clock-frequency = <100000>;
 194  };
 195
 196 +&i2c0mux {
 197 +       pinctrl-0 = <&i2c0_pins>;
 198 +};
 199 +
 200  &i2c1 {
 201         pinctrl-names = "default";
 202         pinctrl-0 = <&i2c1_pins>;
 203 --- a/arch/arm/boot/dts/bcm270x-rpi.dtsi
 204 +++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi
 205 @@ -21,6 +21,7 @@
 206                 i2s = &i2s;
 207                 i2c0 = &i2c0;
 208                 i2c1 = &i2c1;
 209 +               i2c10 = &i2c_csi_dsi;
 210                 spi0 = &spi0;
 211                 spi1 = &spi1;
 212                 spi2 = &spi2;
 213 @@ -83,9 +84,9 @@
 214                 uart1 = <&uart1>,"status";
 215                 i2s = <&i2s>,"status";
 216                 spi = <&spi0>,"status";
 217 -               i2c0 = <&i2c0>,"status";
 218 +               i2c0 = <&i2c0if>,"status",<&i2c0mux>,"status";
 219                 i2c1 = <&i2c1>,"status";
 220 -               i2c0_baudrate = <&i2c0>,"clock-frequency:0";
 221 +               i2c0_baudrate = <&i2c0if>,"clock-frequency:0";
 222                 i2c1_baudrate = <&i2c1>,"clock-frequency:0";
 223
 224                 audio = <&audio>,"status";
 225 @@ -105,7 +106,7 @@
 226         status = "disabled";
 227  };
 228
 229 -&i2c0 {
 230 +&i2c0if {
 231         status = "disabled";
 232  };
 233
 234 --- a/arch/arm/boot/dts/bcm2710-rpi-2-b.dts
 235 +++ b/arch/arm/boot/dts/bcm2710-rpi-2-b.dts
 236 @@ -4,6 +4,7 @@
 237  #include "bcm2709-rpi.dtsi"
 238  #include "bcm283x-rpi-smsc9514.dtsi"
 239  #include "bcm283x-rpi-csi1-2lane.dtsi"
 240 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
 241
 242  / {
 243         compatible = "raspberrypi,2-model-b-rev2", "brcm,bcm2837";
 244 @@ -68,12 +69,14 @@
 245         };
 246  };
 247
 248 -&i2c0 {
 249 -       pinctrl-names = "default";
 250 -       pinctrl-0 = <&i2c0_pins>;
 251 +&i2c0if {
 252         clock-frequency = <100000>;
 253  };
 254
 255 +&i2c0mux {
 256 +       pinctrl-0 = <&i2c0_pins>;
 257 +};
 258 +
 259  &i2c1 {
 260         pinctrl-names = "default";
 261         pinctrl-0 = <&i2c1_pins>;
 262 --- a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
 263 +++ b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
 264 @@ -4,6 +4,7 @@
 265  #include "bcm2709-rpi.dtsi"
 266  #include "bcm283x-rpi-lan7515.dtsi"
 267  #include "bcm283x-rpi-csi1-2lane.dtsi"
 268 +#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
 269
 270  / {
 271         compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
 272 @@ -126,12 +127,14 @@
 273         };
 274  };
 275
 276 -&i2c0 {
 277 -       pinctrl-names = "default";
 278 -       pinctrl-0 = <&i2c0_pins>;
 279 +&i2c0if {
 280         clock-frequency = <100000>;
 281  };
 282
 283 +&i2c0mux {
 284 +       pinctrl-0 = <&i2c0_pins>;
 285 +};
 286 +
 287  &i2c1 {
 288         pinctrl-names = "default";
 289         pinctrl-0 = <&i2c1_pins>;
 290 --- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
 291 +++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
 292 @@ -4,6 +4,7 @@
 293  #include "bcm2709-rpi.dtsi"
 294  #include "bcm283x-rpi-smsc9514.dtsi"
 295  #include "bcm283x-rpi-csi1-2lane.dtsi"
 296 +#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
 297
 298  / {
 299         compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
 300 @@ -137,12 +138,14 @@
 301         };
 302  };
 303
 304 -&i2c0 {
 305 -       pinctrl-names = "default";
 306 -       pinctrl-0 = <&i2c0_pins>;
 307 +&i2c0if {
 308         clock-frequency = <100000>;
 309  };
 310
 311 +&i2c0mux {
 312 +       pinctrl-0 = <&i2c0_pins>;
 313 +};
 314 +
 315  &i2c1 {
 316         pinctrl-names = "default";
 317         pinctrl-0 = <&i2c1_pins>;
 318 --- a/arch/arm/boot/dts/bcm2710-rpi-cm3.dts
 319 +++ b/arch/arm/boot/dts/bcm2710-rpi-cm3.dts
 320 @@ -4,7 +4,7 @@
 321  #include "bcm2709-rpi.dtsi"
 322  #include "bcm283x-rpi-csi0-2lane.dtsi"
 323  #include "bcm283x-rpi-csi1-4lane.dtsi"
 324 -
 325 +#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
 326  / {
 327         compatible = "raspberrypi,3-compute-module", "brcm,bcm2837";
 328         model = "Raspberry Pi Compute Module 3";
 329 @@ -88,12 +88,14 @@
 330         };
 331  };
 332
 333 -&i2c0 {
 334 -       pinctrl-names = "default";
 335 -       pinctrl-0 = <&i2c0_pins>;
 336 +&i2c0if {
 337         clock-frequency = <100000>;
 338  };
 339
 340 +&i2c0mux {
 341 +       pinctrl-0 = <&i2c0_pins>;
 342 +};
 343 +
 344  &i2c1 {
 345         pinctrl-names = "default";
 346         pinctrl-0 = <&i2c1_pins>;
 347 --- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
 348 +++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
 349 @@ -192,6 +192,7 @@
 350
 351  #include "bcm2711-rpi.dtsi"
 352  #include "bcm283x-rpi-csi1-2lane.dtsi"
 353 +#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
 354
 355  /delete-node/ &emmc2;
 356
 357 @@ -421,9 +422,7 @@
 358         };
 359  };
 360
 361 -&i2c0 {
 362 -       pinctrl-names = "default";
 363 -       pinctrl-0 = <&i2c0_pins>;
 364 +&i2c0if {
 365         clock-frequency = <100000>;
 366  };
 367
 368 --- a/arch/arm/boot/dts/bcm2711.dtsi
 369 +++ b/arch/arm/boot/dts/bcm2711.dtsi
 370 @@ -986,7 +986,7 @@
 371         alloc-ranges = <0x0 0x00000000 0x40000000>;
 372  };
 373
 374 -&i2c0 {
 375 +&i2c0if {
 376         compatible = "brcm,bcm2711-i2c", "brcm,bcm2835-i2c";
 377         interrupts = <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
 378  };
 379 --- /dev/null
 380 +++ b/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_28.dtsi
 381 @@ -0,0 +1,4 @@
 382 +&i2c0mux {
 383 +       pinctrl-0 = <&i2c0_gpio0>;
 384 +       pinctrl-1 = <&i2c0_gpio28>;
 385 +};
 386 --- /dev/null
 387 +++ b/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi
 388 @@ -0,0 +1,4 @@
 389 +&i2c0mux {
 390 +       pinctrl-0 = <&i2c0_gpio0>;
 391 +       pinctrl-1 = <&i2c0_gpio44>;
 392 +};
 393 --- a/arch/arm/boot/dts/bcm283x.dtsi
 394 +++ b/arch/arm/boot/dts/bcm283x.dtsi
 395 @@ -340,7 +340,7 @@
 396                         status = "disabled";
 397                 };
 398
 399 -               i2c0: i2c@7e205000 {
 400 +               i2c0if: i2c@7e205000 {
 401                         compatible = "brcm,bcm2835-i2c";
 402                         reg = <0x7e205000 0x200>;
 403                         interrupts = <2 21>;
 404 @@ -350,6 +350,30 @@
 405                         status = "disabled";
 406                 };
 407
 408 +               i2c0mux: i2c0mux {
 409 +                       compatible = "i2c-mux-pinctrl";
 410 +                       #address-cells = <1>;
 411 +                       #size-cells = <0>;
 412 +
 413 +                       i2c-parent = <&i2c0if>;
 414 +
 415 +                       pinctrl-names = "i2c0", "i2c_csi_dsi";
 416 +
 417 +                       status = "disabled";
 418 +
 419 +                       i2c0: i2c@0 {
 420 +                               reg = <0>;
 421 +                               #address-cells = <1>;
 422 +                               #size-cells = <0>;
 423 +                       };
 424 +
 425 +                       i2c_csi_dsi: i2c@1 {
 426 +                               reg = <1>;
 427 +                               #address-cells = <1>;
 428 +                               #size-cells = <0>;
 429 +                       };
 430 +               };
 431 +
 432                 dpi: dpi@7e208000 {
 433                         compatible = "brcm,bcm2835-dpi";
 434                         reg = <0x7e208000 0x8c>;