target/linux/bcm27xx/patches-5.4/950-0393-sound-Add-the-HiFiBerry-DAC-HD-version.patch

   1 From 221b442eb7e5b4ed16151b5501f4b905a9b8455c Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?J=C3=B6rg=20Schambacher?=
   3  <j-schambacher@users.noreply.github.com>
   4 Date: Tue, 21 Jan 2020 15:58:39 +0100
   5 Subject: [PATCH] sound: Add the HiFiBerry DAC+HD version
   6
   7 This adds the driver for the DAC+HD version supporting HiFiBerry's
   8 PCM179x based DACs. It also adds PLL control for clock generation.
   9
  10 Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
  11 ---
  12  arch/arm/boot/dts/overlays/Makefile           |   1 +
  13  arch/arm/boot/dts/overlays/README             |   6 +
  14  .../overlays/hifiberry-dacplushd-overlay.dts  | 106 ++++++
  15  drivers/clk/Kconfig                           |   3 +
  16  drivers/clk/Makefile                          |   1 +
  17  drivers/clk/clk-hifiberry-dachd.c             | 333 ++++++++++++++++++
  18  sound/soc/bcm/Kconfig                         |   9 +
  19  sound/soc/bcm/Makefile                        |   2 +
  20  sound/soc/bcm/hifiberry_dacplushd.c           | 238 +++++++++++++
  21  14 files changed, 704 insertions(+)
  22  create mode 100644 arch/arm/boot/dts/overlays/hifiberry-dacplushd-overlay.dts
  23  create mode 100644 drivers/clk/clk-hifiberry-dachd.c
  24  create mode 100644 sound/soc/bcm/hifiberry_dacplushd.c
  25
  26 --- a/arch/arm/boot/dts/overlays/Makefile
  27 +++ b/arch/arm/boot/dts/overlays/Makefile
  28 @@ -57,6 +57,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  29         hifiberry-dacplusadc.dtbo \
  30         hifiberry-dacplusadcpro.dtbo \
  31         hifiberry-dacplusdsp.dtbo \
  32 +       hifiberry-dacplushd.dtbo \
  33         hifiberry-digi.dtbo \
  34         hifiberry-digi-pro.dtbo \
  35         hy28a.dtbo \
  36 --- a/arch/arm/boot/dts/overlays/README
  37 +++ b/arch/arm/boot/dts/overlays/README
  38 @@ -956,6 +956,12 @@ Load:   dtoverlay=hifiberry-dacplusdsp
  39  Params: <None>
  40
  41
  42 +Name:   hifiberry-dacplushd
  43 +Info:   Configures the HifiBerry DAC+ HD audio card
  44 +Load:   dtoverlay=hifiberry-dacplushd
  45 +Params: <None>
  46 +
  47 +
  48  Name:   hifiberry-digi
  49  Info:   Configures the HifiBerry Digi and Digi+ audio card
  50  Load:   dtoverlay=hifiberry-digi
  51 --- /dev/null
  52 +++ b/arch/arm/boot/dts/overlays/hifiberry-dacplushd-overlay.dts
  53 @@ -0,0 +1,106 @@
  54 +// Definitions for HiFiBerry DAC+ HD
  55 +/dts-v1/;
  56 +/plugin/;
  57 +
  58 +#include <dt-bindings/gpio/gpio.h>
  59 +
  60 +/ {
  61 +       compatible = "brcm,bcm2835";
  62 +
  63 +       fragment@0 {
  64 +               target-path = "/clocks";
  65 +               __overlay__ {
  66 +                       dachd_osc: pll_dachd_osc {
  67 +                               compatible = "hifiberry,dachd-clk";
  68 +                               #clock-cells = <0>;
  69 +                       };
  70 +               };
  71 +       };
  72 +
  73 +       fragment@1 {
  74 +               target = <&i2s>;
  75 +               __overlay__ {
  76 +                       status = "okay";
  77 +               };
  78 +       };
  79 +
  80 +       fragment@2 {
  81 +               target = <&i2c1>;
  82 +               __overlay__ {
  83 +                       #address-cells = <1>;
  84 +                       #size-cells = <0>;
  85 +                       status = "okay";
  86 +
  87 +                       pcm1792a@4c {
  88 +                               compatible = "ti,pcm1792a";
  89 +                               #sound-dai-cells = <0>;
  90 +                               #clock-cells = <0>;
  91 +                               clocks = <&dachd_osc>;
  92 +                               reg = <0x4c>;
  93 +                               status = "okay";
  94 +                       };
  95 +                       pll: pll@62 {
  96 +                               compatible = "hifiberry,dachd-clk";
  97 +                               #clock-cells = <0>;
  98 +                               reg = <0x62>;
  99 +                               clocks = <&dachd_osc>;
 100 +                               status = "okay";
 101 +                               common_pll_regs = [
 102 +                                       02 53 03 00 07 20 0F 00
 103 +                                       10 0D 11 1D 12 0D 13 8C
 104 +                                       14 8C 15 8C 16 8C 17 8C
 105 +                                       18 2A 1C 00 1D 0F 1F 00
 106 +                                       2A 00 2C 00 2F 00 30 00
 107 +                                       31 00 32 00 34 00 37 00
 108 +                                       38 00 39 00 3A 00 3B 01
 109 +                                       3E 00 3F 00 40 00 41 00
 110 +                                       5A 00 5B 00 95 00 96 00
 111 +                                       97 00 98 00 99 00 9A 00
 112 +                                       9B 00 A2 00 A3 00 A4 00
 113 +                                       B7 92 ];
 114 +                               192k_pll_regs = [
 115 +                                       1A 0C 1B 35 1E F0 20 09
 116 +                                       21 50 2B 02 2D 10 2E 40
 117 +                                       33 01 35 22 36 80 3C 22
 118 +                                       3D 46 ];
 119 +                               96k_pll_regs = [
 120 +                                       1A 0C 1B 35 1E F0 20 09
 121 +                                       21 50 2B 02 2D 10 2E 40
 122 +                                       33 01 35 47 36 00 3C 32
 123 +                                       3D 46 ];
 124 +                               48k_pll_regs = [
 125 +                                       1A 0C 1B 35 1E F0 20 09
 126 +                                       21 50 2B 02 2D 10 2E 40
 127 +                                       33 01 35 90 36 00 3C 42
 128 +                                       3D 46 ];
 129 +                               176k4_pll_regs = [
 130 +                                       1A 3D 1B 09 1E F3 20 13
 131 +                                       21 75 2B 04 2D 11 2E E0
 132 +                                       33 02 35 25 36 C0 3C 22
 133 +                                       3D 7A ];
 134 +                               88k2_pll_regs = [
 135 +                                       1A 3D 1B 09 1E F3 20 13
 136 +                                       21 75 2B 04 2D 11 2E E0
 137 +                                       33 01 35 4D 36 80 3C 32
 138 +                                       3D 7A ];
 139 +                               44k1_pll_regs = [
 140 +                                       1A 3D 1B 09 1E F3 20 13
 141 +                                       21 75 2B 04 2D 11 2E E0
 142 +                                       33 01 35 9D 36 00 3C 42
 143 +                                       3D 7A ];
 144 +                       };
 145 +               };
 146 +       };
 147 +
 148 +       fragment@3 {
 149 +               target = <&sound>;
 150 +               __overlay__ {
 151 +                       compatible = "hifiberry,hifiberry-dacplushd";
 152 +                       i2s-controller = <&i2s>;
 153 +                       clocks = <&pll 0>;
 154 +                       reset-gpio = <&gpio 16 GPIO_ACTIVE_LOW>;
 155 +                       status = "okay";
 156 +               };
 157 +       };
 158 +
 159 +};
 160 --- a/drivers/clk/Kconfig
 161 +++ b/drivers/clk/Kconfig
 162 @@ -70,6 +70,9 @@ config COMMON_CLK_HI655X
 163           multi-function device has one fixed-rate oscillator, clocked
 164           at 32KHz.
 165
 166 +config COMMON_CLK_HIFIBERRY_DACPLUSHD
 167 +       tristate
 168 +
 169  config COMMON_CLK_HIFIBERRY_DACPRO
 170         tristate
 171
 172 --- a/drivers/clk/Makefile
 173 +++ b/drivers/clk/Makefile
 174 @@ -36,6 +36,7 @@ obj-$(CONFIG_ARCH_HIGHBANK)           += clk-high
 175  obj-$(CONFIG_CLK_HSDK)                 += clk-hsdk-pll.o
 176  obj-$(CONFIG_COMMON_CLK_LOCHNAGAR)     += clk-lochnagar.o
 177  obj-$(CONFIG_COMMON_CLK_HIFIBERRY_DACPRO)      += clk-hifiberry-dacpro.o
 178 +obj-$(CONFIG_COMMON_CLK_HIFIBERRY_DACPLUSHD)   += clk-hifiberry-dachd.o
 179  obj-$(CONFIG_COMMON_CLK_MAX77686)      += clk-max77686.o
 180  obj-$(CONFIG_COMMON_CLK_MAX9485)       += clk-max9485.o
 181  obj-$(CONFIG_ARCH_MILBEAUT_M10V)       += clk-milbeaut.o
 182 --- /dev/null
 183 +++ b/drivers/clk/clk-hifiberry-dachd.c
 184 @@ -0,0 +1,333 @@
 185 +// SPDX-License-Identifier: GPL-2.0
 186 +/*
 187 + * Clock Driver for HiFiBerry DAC+ HD
 188 + *
 189 + * Author: Joerg Schambacher, i2Audio GmbH for HiFiBerry
 190 + *         Copyright 2020
 191 + *
 192 + * This program is free software; you can redistribute it and/or
 193 + * modify it under the terms of the GNU General Public License
 194 + * version 2 as published by the Free Software Foundation.
 195 + *
 196 + * This program is distributed in the hope that it will be useful, but
 197 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 198 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 199 + * General Public License for more details.
 200 + */
 201 +
 202 +#include <linux/clk-provider.h>
 203 +#include <linux/clk.h>
 204 +#include <linux/kernel.h>
 205 +#include <linux/module.h>
 206 +#include <linux/of.h>
 207 +#include <linux/slab.h>
 208 +#include <linux/platform_device.h>
 209 +#include <linux/i2c.h>
 210 +#include <linux/regmap.h>
 211 +
 212 +#define NO_PLL_RESET                   0
 213 +#define PLL_RESET                      1
 214 +#define HIFIBERRY_PLL_MAX_REGISTER     256
 215 +#define DEFAULT_RATE                   44100
 216 +
 217 +static struct reg_default hifiberry_pll_reg_defaults[] = {
 218 +       {0x02, 0x53}, {0x03, 0x00}, {0x07, 0x20}, {0x0F, 0x00},
 219 +       {0x10, 0x0D}, {0x11, 0x1D}, {0x12, 0x0D}, {0x13, 0x8C},
 220 +       {0x14, 0x8C}, {0x15, 0x8C}, {0x16, 0x8C}, {0x17, 0x8C},
 221 +       {0x18, 0x2A}, {0x1C, 0x00}, {0x1D, 0x0F}, {0x1F, 0x00},
 222 +       {0x2A, 0x00}, {0x2C, 0x00}, {0x2F, 0x00}, {0x30, 0x00},
 223 +       {0x31, 0x00}, {0x32, 0x00}, {0x34, 0x00}, {0x37, 0x00},
 224 +       {0x38, 0x00}, {0x39, 0x00}, {0x3A, 0x00}, {0x3B, 0x01},
 225 +       {0x3E, 0x00}, {0x3F, 0x00}, {0x40, 0x00}, {0x41, 0x00},
 226 +       {0x5A, 0x00}, {0x5B, 0x00}, {0x95, 0x00}, {0x96, 0x00},
 227 +       {0x97, 0x00}, {0x98, 0x00}, {0x99, 0x00}, {0x9A, 0x00},
 228 +       {0x9B, 0x00}, {0xA2, 0x00}, {0xA3, 0x00}, {0xA4, 0x00},
 229 +       {0xB7, 0x92},
 230 +       {0x1A, 0x3D}, {0x1B, 0x09}, {0x1E, 0xF3}, {0x20, 0x13},
 231 +       {0x21, 0x75}, {0x2B, 0x04}, {0x2D, 0x11}, {0x2E, 0xE0},
 232 +       {0x3D, 0x7A},
 233 +       {0x35, 0x9D}, {0x36, 0x00}, {0x3C, 0x42},
 234 +       { 177, 0xAC},
 235 +};
 236 +static struct reg_default common_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 237 +static int num_common_pll_regs;
 238 +static struct reg_default dedicated_192k_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 239 +static int num_dedicated_192k_pll_regs;
 240 +static struct reg_default dedicated_96k_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 241 +static int num_dedicated_96k_pll_regs;
 242 +static struct reg_default dedicated_48k_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 243 +static int num_dedicated_48k_pll_regs;
 244 +static struct reg_default dedicated_176k4_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 245 +static int num_dedicated_176k4_pll_regs;
 246 +static struct reg_default dedicated_88k2_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 247 +static int num_dedicated_88k2_pll_regs;
 248 +static struct reg_default dedicated_44k1_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
 249 +static int num_dedicated_44k1_pll_regs;
 250 +
 251 +/**
 252 + * struct clk_hifiberry_drvdata - Common struct to the HiFiBerry DAC HD Clk
 253 + * @hw: clk_hw for the common clk framework
 254 + */
 255 +struct clk_hifiberry_drvdata {
 256 +       struct regmap *regmap;
 257 +       struct clk *clk;
 258 +       struct clk_hw hw;
 259 +       unsigned long rate;
 260 +};
 261 +
 262 +#define to_hifiberry_clk(_hw) \
 263 +       container_of(_hw, struct clk_hifiberry_drvdata, hw)
 264 +
 265 +static int clk_hifiberry_dachd_write_pll_regs(struct regmap *regmap,
 266 +                               struct reg_default *regs,
 267 +                               int num, int do_pll_reset)
 268 +{
 269 +       int i;
 270 +       int ret = 0;
 271 +       char pll_soft_reset[] = { 177, 0xAC, };
 272 +
 273 +       for (i = 0; i < num; i++) {
 274 +               ret |= regmap_write(regmap, regs[i].reg, regs[i].def);
 275 +               if (ret)
 276 +                       return ret;
 277 +       }
 278 +       if (do_pll_reset) {
 279 +               ret |= regmap_write(regmap, pll_soft_reset[0],
 280 +                                               pll_soft_reset[1]);
 281 +               mdelay(10);
 282 +       }
 283 +       return ret;
 284 +}
 285 +
 286 +static unsigned long clk_hifiberry_dachd_recalc_rate(struct clk_hw *hw,
 287 +       unsigned long parent_rate)
 288 +{
 289 +       return to_hifiberry_clk(hw)->rate;
 290 +}
 291 +
 292 +static long clk_hifiberry_dachd_round_rate(struct clk_hw *hw,
 293 +       unsigned long rate, unsigned long *parent_rate)
 294 +{
 295 +       return rate;
 296 +}
 297 +
 298 +static int clk_hifiberry_dachd_set_rate(struct clk_hw *hw,
 299 +       unsigned long rate, unsigned long parent_rate)
 300 +{
 301 +       int ret;
 302 +       struct clk_hifiberry_drvdata *drvdata = to_hifiberry_clk(hw);
 303 +
 304 +       switch (rate) {
 305 +       case 44100:
 306 +               ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
 307 +                       dedicated_44k1_pll_regs, num_dedicated_44k1_pll_regs,
 308 +                       PLL_RESET);
 309 +               break;
 310 +       case 88200:
 311 +               ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
 312 +                       dedicated_88k2_pll_regs, num_dedicated_88k2_pll_regs,
 313 +                       PLL_RESET);
 314 +               break;
 315 +       case 176400:
 316 +               ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
 317 +                       dedicated_176k4_pll_regs, num_dedicated_176k4_pll_regs,
 318 +                       PLL_RESET);
 319 +               break;
 320 +       case 48000:
 321 +               ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
 322 +                       dedicated_48k_pll_regs, num_dedicated_48k_pll_regs,
 323 +                       PLL_RESET);
 324 +               break;
 325 +       case 96000:
 326 +               ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
 327 +                       dedicated_96k_pll_regs, num_dedicated_96k_pll_regs,
 328 +                       PLL_RESET);
 329 +               break;
 330 +       case 192000:
 331 +               ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
 332 +                       dedicated_192k_pll_regs, num_dedicated_192k_pll_regs,
 333 +                       PLL_RESET);
 334 +               break;
 335 +       default:
 336 +               ret = -EINVAL;
 337 +               break;
 338 +       }
 339 +       to_hifiberry_clk(hw)->rate = rate;
 340 +
 341 +       return ret;
 342 +}
 343 +
 344 +const struct clk_ops clk_hifiberry_dachd_rate_ops = {
 345 +       .recalc_rate = clk_hifiberry_dachd_recalc_rate,
 346 +       .round_rate = clk_hifiberry_dachd_round_rate,
 347 +       .set_rate = clk_hifiberry_dachd_set_rate,
 348 +};
 349 +
 350 +static int clk_hifiberry_get_prop_values(struct device *dev,
 351 +                                       char *prop_name,
 352 +                                       struct reg_default *regs)
 353 +{
 354 +       int ret;
 355 +       int i;
 356 +       u8 tmp[2 * HIFIBERRY_PLL_MAX_REGISTER];
 357 +
 358 +       ret = of_property_read_variable_u8_array(dev->of_node, prop_name,
 359 +                       tmp, 0, 2 * HIFIBERRY_PLL_MAX_REGISTER);
 360 +       if (ret < 0)
 361 +               return ret;
 362 +       if (ret & 1) {
 363 +               dev_err(dev,
 364 +                       "%s <%s> -> #%i odd number of bytes for reg/val pairs!",
 365 +                       __func__,
 366 +                       prop_name,
 367 +                       ret);
 368 +               return -EINVAL;
 369 +       }
 370 +       ret /= 2;
 371 +       for (i = 0; i < ret; i++) {
 372 +               regs[i].reg = (u32)tmp[2 * i];
 373 +               regs[i].def = (u32)tmp[2 * i + 1];
 374 +       }
 375 +       return ret;
 376 +}
 377 +
 378 +
 379 +static int clk_hifiberry_dachd_dt_parse(struct device *dev)
 380 +{
 381 +       num_common_pll_regs = clk_hifiberry_get_prop_values(dev,
 382 +                               "common_pll_regs", common_pll_regs);
 383 +       num_dedicated_44k1_pll_regs = clk_hifiberry_get_prop_values(dev,
 384 +                               "44k1_pll_regs", dedicated_44k1_pll_regs);
 385 +       num_dedicated_88k2_pll_regs = clk_hifiberry_get_prop_values(dev,
 386 +                               "88k2_pll_regs", dedicated_88k2_pll_regs);
 387 +       num_dedicated_176k4_pll_regs = clk_hifiberry_get_prop_values(dev,
 388 +                               "176k4_pll_regs", dedicated_176k4_pll_regs);
 389 +       num_dedicated_48k_pll_regs = clk_hifiberry_get_prop_values(dev,
 390 +                               "48k_pll_regs", dedicated_48k_pll_regs);
 391 +       num_dedicated_96k_pll_regs = clk_hifiberry_get_prop_values(dev,
 392 +                               "96k_pll_regs", dedicated_96k_pll_regs);
 393 +       num_dedicated_192k_pll_regs = clk_hifiberry_get_prop_values(dev,
 394 +                               "192k_pll_regs", dedicated_192k_pll_regs);
 395 +       return 0;
 396 +}
 397 +
 398 +
 399 +static int clk_hifiberry_dachd_remove(struct device *dev)
 400 +{
 401 +       of_clk_del_provider(dev->of_node);
 402 +       return 0;
 403 +}
 404 +
 405 +const struct regmap_config hifiberry_pll_regmap = {
 406 +       .reg_bits = 8,
 407 +       .val_bits = 8,
 408 +       .max_register = HIFIBERRY_PLL_MAX_REGISTER,
 409 +       .reg_defaults = hifiberry_pll_reg_defaults,
 410 +       .num_reg_defaults = ARRAY_SIZE(hifiberry_pll_reg_defaults),
 411 +       .cache_type = REGCACHE_RBTREE,
 412 +};
 413 +EXPORT_SYMBOL_GPL(hifiberry_pll_regmap);
 414 +
 415 +
 416 +static int clk_hifiberry_dachd_i2c_probe(struct i2c_client *i2c,
 417 +                            const struct i2c_device_id *id)
 418 +{
 419 +       struct clk_hifiberry_drvdata *hdclk;
 420 +       int ret = 0;
 421 +       struct clk_init_data init;
 422 +       struct device *dev = &i2c->dev;
 423 +       struct device_node *dev_node = dev->of_node;
 424 +       struct regmap_config config = hifiberry_pll_regmap;
 425 +
 426 +       hdclk = devm_kzalloc(&i2c->dev,
 427 +                       sizeof(struct clk_hifiberry_drvdata), GFP_KERNEL);
 428 +       if (!hdclk)
 429 +               return -ENOMEM;
 430 +
 431 +       i2c_set_clientdata(i2c, hdclk);
 432 +
 433 +       hdclk->regmap = devm_regmap_init_i2c(i2c, &config);
 434 +
 435 +       if (IS_ERR(hdclk->regmap))
 436 +               return PTR_ERR(hdclk->regmap);
 437 +
 438 +       /* start PLL to allow detection of DAC */
 439 +       ret = clk_hifiberry_dachd_write_pll_regs(hdclk->regmap,
 440 +                               hifiberry_pll_reg_defaults,
 441 +                               ARRAY_SIZE(hifiberry_pll_reg_defaults),
 442 +                               PLL_RESET);
 443 +       if (ret)
 444 +               return ret;
 445 +
 446 +       clk_hifiberry_dachd_dt_parse(dev);
 447 +
 448 +       /* restart PLL with configs from DTB */
 449 +       ret = clk_hifiberry_dachd_write_pll_regs(hdclk->regmap, common_pll_regs,
 450 +                                       num_common_pll_regs, PLL_RESET);
 451 +       if (ret)
 452 +               return ret;
 453 +
 454 +       init.name = "clk-hifiberry-dachd";
 455 +       init.ops = &clk_hifiberry_dachd_rate_ops;
 456 +       init.flags = 0;
 457 +       init.parent_names = NULL;
 458 +       init.num_parents = 0;
 459 +
 460 +       hdclk->hw.init = &init;
 461 +
 462 +       hdclk->clk = devm_clk_register(dev, &hdclk->hw);
 463 +       if (IS_ERR(hdclk->clk)) {
 464 +               dev_err(dev, "unable to register %s\n", init.name);
 465 +               return PTR_ERR(hdclk->clk);
 466 +       }
 467 +
 468 +       ret = of_clk_add_provider(dev_node, of_clk_src_simple_get, hdclk->clk);
 469 +       if (ret != 0) {
 470 +               dev_err(dev, "Cannot of_clk_add_provider");
 471 +               return ret;
 472 +       }
 473 +
 474 +       ret = clk_set_rate(hdclk->hw.clk, DEFAULT_RATE);
 475 +       if (ret != 0) {
 476 +               dev_err(dev, "Cannot set rate : %d\n",  ret);
 477 +               return -EINVAL;
 478 +       }
 479 +
 480 +       return ret;
 481 +}
 482 +
 483 +static int clk_hifiberry_dachd_i2c_remove(struct i2c_client *i2c)
 484 +{
 485 +       clk_hifiberry_dachd_remove(&i2c->dev);
 486 +       return 0;
 487 +}
 488 +
 489 +static const struct i2c_device_id clk_hifiberry_dachd_i2c_id[] = {
 490 +       { "dachd-clk", },
 491 +       { }
 492 +};
 493 +MODULE_DEVICE_TABLE(i2c, clk_hifiberry_dachd_i2c_id);
 494 +
 495 +static const struct of_device_id clk_hifiberry_dachd_of_match[] = {
 496 +       { .compatible = "hifiberry,dachd-clk", },
 497 +       { }
 498 +};
 499 +MODULE_DEVICE_TABLE(of, clk_hifiberry_dachd_of_match);
 500 +
 501 +static struct i2c_driver clk_hifiberry_dachd_i2c_driver = {
 502 +       .probe          = clk_hifiberry_dachd_i2c_probe,
 503 +       .remove         = clk_hifiberry_dachd_i2c_remove,
 504 +       .id_table       = clk_hifiberry_dachd_i2c_id,
 505 +       .driver         = {
 506 +               .name   = "dachd-clk",
 507 +               .of_match_table = of_match_ptr(clk_hifiberry_dachd_of_match),
 508 +       },
 509 +};
 510 +
 511 +module_i2c_driver(clk_hifiberry_dachd_i2c_driver);
 512 +
 513 +
 514 +MODULE_DESCRIPTION("HiFiBerry DAC+ HD clock driver");
 515 +MODULE_AUTHOR("Joerg Schambacher <joerg@i2audio.com>");
 516 +MODULE_LICENSE("GPL v2");
 517 +MODULE_ALIAS("platform:clk-hifiberry-dachd");
 518 --- a/sound/soc/bcm/Kconfig
 519 +++ b/sound/soc/bcm/Kconfig
 520 @@ -42,6 +42,14 @@ config SND_BCM2708_SOC_HIFIBERRY_DACPLUS
 521          help
 522           Say Y or M if you want to add support for HifiBerry DAC+.
 523
 524 +config SND_BCM2708_SOC_HIFIBERRY_DACPLUSHD
 525 +        tristate "Support for HifiBerry DAC+ HD"
 526 +        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 527 +        select SND_SOC_PCM179X_I2C
 528 +        select COMMON_CLK_HIFIBERRY_DACPLUSHD
 529 +        help
 530 +         Say Y or M if you want to add support for HifiBerry DAC+ HD.
 531 +
 532  config SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC
 533          tristate "Support for HifiBerry DAC+ADC"
 534          depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 535 @@ -56,6 +64,7 @@ config SND_BCM2708_SOC_HIFIBERRY_DACPLUS
 536          depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 537          select SND_SOC_PCM512x_I2C
 538         select SND_SOC_PCM186X_I2C
 539 +        select COMMON_CLK_HIFIBERRY_DACPRO
 540          help
 541           Say Y or M if you want to add support for HifiBerry DAC+ADC PRO.
 542
 543 --- a/sound/soc/bcm/Makefile
 544 +++ b/sound/soc/bcm/Makefile
 545 @@ -14,6 +14,7 @@ snd-soc-googlevoicehat-codec-objs := goo
 546
 547  # BCM2708 Machine Support
 548  snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
 549 +snd-soc-hifiberry-dacplushd-objs := hifiberry_dacplushd.o
 550  snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
 551  snd-soc-hifiberry-dacplusadcpro-objs := hifiberry_dacplusadcpro.o
 552  snd-soc-hifiberry-dacplusdsp-objs := hifiberry_dacplusdsp.o
 553 @@ -41,6 +42,7 @@ snd-soc-rpi-wm8804-soundcard-objs := rpi
 554
 555  obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD)  += snd-soc-googlevoicehat-codec.o
 556  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
 557 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSHD) += snd-soc-hifiberry-dacplushd.o
 558  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
 559  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADCPRO) += snd-soc-hifiberry-dacplusadcpro.o
 560  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSDSP) += snd-soc-hifiberry-dacplusdsp.o
 561 --- /dev/null
 562 +++ b/sound/soc/bcm/hifiberry_dacplushd.c
 563 @@ -0,0 +1,238 @@
 564 +// SPDX-License-Identifier: GPL-2.0
 565 +/*
 566 + * ASoC Driver for HiFiBerry DAC+ HD
 567 + *
 568 + * Author:     Joerg Schambacher, i2Audio GmbH for HiFiBerry
 569 + *             Copyright 2020
 570 + *
 571 + * This program is free software; you can redistribute it and/or
 572 + * modify it under the terms of the GNU General Public License
 573 + * version 2 as published by the Free Software Foundation.
 574 + *
 575 + * This program is distributed in the hope that it will be useful, but
 576 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 577 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 578 + * General Public License for more details.
 579 + */
 580 +
 581 +#include <linux/module.h>
 582 +#include <linux/platform_device.h>
 583 +#include <linux/kernel.h>
 584 +#include <linux/delay.h>
 585 +#include <linux/module.h>
 586 +#include <linux/of.h>
 587 +#include <linux/delay.h>
 588 +#include <linux/gpio.h>
 589 +#include <linux/gpio/consumer.h>
 590 +#include <sound/core.h>
 591 +#include <sound/pcm.h>
 592 +#include <sound/pcm_params.h>
 593 +#include <sound/soc.h>
 594 +#include <linux/i2c.h>
 595 +#include <linux/clk.h>
 596 +
 597 +#include "../codecs/pcm179x.h"
 598 +
 599 +#define DEFAULT_RATE           44100
 600 +
 601 +struct brd_drv_data {
 602 +       struct regmap *regmap;
 603 +       struct clk *sclk;
 604 +};
 605 +
 606 +static struct brd_drv_data drvdata;
 607 +static struct gpio_desc *reset_gpio;
 608 +static const unsigned int hb_dacplushd_rates[] = {
 609 +       192000, 96000, 48000, 176400, 88200, 44100,
 610 +};
 611 +
 612 +static struct snd_pcm_hw_constraint_list hb_dacplushd_constraints = {
 613 +       .list = hb_dacplushd_rates,
 614 +       .count = ARRAY_SIZE(hb_dacplushd_rates),
 615 +};
 616 +
 617 +static int snd_rpi_hb_dacplushd_startup(struct snd_pcm_substream *substream)
 618 +{
 619 +       /* constraints for standard sample rates */
 620 +       snd_pcm_hw_constraint_list(substream->runtime, 0,
 621 +                               SNDRV_PCM_HW_PARAM_RATE,
 622 +                               &hb_dacplushd_constraints);
 623 +       return 0;
 624 +}
 625 +
 626 +static void snd_rpi_hifiberry_dacplushd_set_sclk(
 627 +               struct snd_soc_component *component,
 628 +               int sample_rate)
 629 +{
 630 +       if (!IS_ERR(drvdata.sclk))
 631 +               clk_set_rate(drvdata.sclk, sample_rate);
 632 +}
 633 +
 634 +static int snd_rpi_hifiberry_dacplushd_init(struct snd_soc_pcm_runtime *rtd)
 635 +{
 636 +       struct snd_soc_dai_link *dai = rtd->dai_link;
 637 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 638 +
 639 +       dai->name = "HiFiBerry DAC+ HD";
 640 +       dai->stream_name = "HiFiBerry DAC+ HD HiFi";
 641 +       dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 642 +               | SND_SOC_DAIFMT_CBM_CFM;
 643 +
 644 +       /* allow only fixed 32 clock counts per channel */
 645 +       snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);
 646 +
 647 +       return 0;
 648 +}
 649 +
 650 +static int snd_rpi_hifiberry_dacplushd_hw_params(
 651 +       struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
 652 +{
 653 +       int ret = 0;
 654 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 655 +
 656 +       struct snd_soc_component *component = rtd->codec_dai->component;
 657 +
 658 +       snd_rpi_hifiberry_dacplushd_set_sclk(component, params_rate(params));
 659 +       return ret;
 660 +}
 661 +
 662 +/* machine stream operations */
 663 +static struct snd_soc_ops snd_rpi_hifiberry_dacplushd_ops = {
 664 +       .startup = snd_rpi_hb_dacplushd_startup,
 665 +       .hw_params = snd_rpi_hifiberry_dacplushd_hw_params,
 666 +};
 667 +
 668 +SND_SOC_DAILINK_DEFS(hifi,
 669 +       DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
 670 +       DAILINK_COMP_ARRAY(COMP_CODEC("pcm179x.1-004c", "pcm179x-hifi")),
 671 +       DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
 672 +
 673 +
 674 +static struct snd_soc_dai_link snd_rpi_hifiberry_dacplushd_dai[] = {
 675 +{
 676 +       .name           = "HiFiBerry DAC+ HD",
 677 +       .stream_name    = "HiFiBerry DAC+ HD HiFi",
 678 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 679 +                               SND_SOC_DAIFMT_CBS_CFS,
 680 +       .ops            = &snd_rpi_hifiberry_dacplushd_ops,
 681 +       .init           = snd_rpi_hifiberry_dacplushd_init,
 682 +       SND_SOC_DAILINK_REG(hifi),
 683 +},
 684 +};
 685 +
 686 +/* audio machine driver */
 687 +static struct snd_soc_card snd_rpi_hifiberry_dacplushd = {
 688 +       .name         = "snd_rpi_hifiberry_dacplushd",
 689 +       .driver_name  = "HifiberryDacplusHD",
 690 +       .owner        = THIS_MODULE,
 691 +       .dai_link     = snd_rpi_hifiberry_dacplushd_dai,
 692 +       .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_dacplushd_dai),
 693 +};
 694 +
 695 +static int snd_rpi_hifiberry_dacplushd_probe(struct platform_device *pdev)
 696 +{
 697 +       int ret = 0;
 698 +       static int dac_reset_done;
 699 +       struct device *dev = &pdev->dev;
 700 +       struct device_node *dev_node = dev->of_node;
 701 +
 702 +       snd_rpi_hifiberry_dacplushd.dev = &pdev->dev;
 703 +
 704 +       /* get GPIO and release DAC from RESET */
 705 +       if (!dac_reset_done) {
 706 +               reset_gpio = gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
 707 +               if (IS_ERR(reset_gpio)) {
 708 +                       dev_err(&pdev->dev, "gpiod_get() failed\n");
 709 +                       return -EINVAL;
 710 +               }
 711 +               dac_reset_done = 1;
 712 +       }
 713 +       if (!IS_ERR(reset_gpio))
 714 +               gpiod_set_value(reset_gpio, 0);
 715 +       msleep(1);
 716 +       if (!IS_ERR(reset_gpio))
 717 +               gpiod_set_value(reset_gpio, 1);
 718 +       msleep(1);
 719 +       if (!IS_ERR(reset_gpio))
 720 +               gpiod_set_value(reset_gpio, 0);
 721 +
 722 +       if (pdev->dev.of_node) {
 723 +               struct device_node *i2s_node;
 724 +               struct snd_soc_dai_link *dai;
 725 +
 726 +               dai = &snd_rpi_hifiberry_dacplushd_dai[0];
 727 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 728 +                       "i2s-controller", 0);
 729 +
 730 +               if (i2s_node) {
 731 +                       dai->cpus->of_node = i2s_node;
 732 +                       dai->platforms->of_node = i2s_node;
 733 +                       dai->cpus->dai_name = NULL;
 734 +                       dai->platforms->name = NULL;
 735 +               } else {
 736 +                       return -EPROBE_DEFER;
 737 +               }
 738 +
 739 +       }
 740 +
 741 +       ret = devm_snd_soc_register_card(&pdev->dev,
 742 +                       &snd_rpi_hifiberry_dacplushd);
 743 +       if (ret && ret != -EPROBE_DEFER) {
 744 +               dev_err(&pdev->dev,
 745 +                       "snd_soc_register_card() failed: %d\n", ret);
 746 +               return ret;
 747 +       }
 748 +       if (ret == -EPROBE_DEFER)
 749 +               return ret;
 750 +
 751 +       dev_set_drvdata(dev, &drvdata);
 752 +       if (dev_node == NULL) {
 753 +               dev_err(&pdev->dev, "Device tree node not found\n");
 754 +               return -ENODEV;
 755 +       }
 756 +
 757 +       drvdata.sclk = devm_clk_get(dev, NULL);
 758 +       if (IS_ERR(drvdata.sclk)) {
 759 +               drvdata.sclk = ERR_PTR(-ENOENT);
 760 +               return -ENODEV;
 761 +       }
 762 +
 763 +       clk_set_rate(drvdata.sclk, DEFAULT_RATE);
 764 +
 765 +       return ret;
 766 +}
 767 +
 768 +static int snd_rpi_hifiberry_dacplushd_remove(struct platform_device *pdev)
 769 +{
 770 +       if (IS_ERR(reset_gpio))
 771 +               return -EINVAL;
 772 +
 773 +       /* put DAC into RESET and release GPIO */
 774 +       gpiod_set_value(reset_gpio, 0);
 775 +       gpiod_put(reset_gpio);
 776 +
 777 +       return 0;
 778 +}
 779 +
 780 +static const struct of_device_id snd_rpi_hifiberry_dacplushd_of_match[] = {
 781 +       { .compatible = "hifiberry,hifiberry-dacplushd", },
 782 +       {},
 783 +};
 784 +
 785 +MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplushd_of_match);
 786 +
 787 +static struct platform_driver snd_rpi_hifiberry_dacplushd_driver = {
 788 +       .driver = {
 789 +               .name   = "snd-rpi-hifiberry-dacplushd",
 790 +               .owner  = THIS_MODULE,
 791 +               .of_match_table = snd_rpi_hifiberry_dacplushd_of_match,
 792 +       },
 793 +       .probe          = snd_rpi_hifiberry_dacplushd_probe,
 794 +       .remove         = snd_rpi_hifiberry_dacplushd_remove,
 795 +};
 796 +
 797 +module_platform_driver(snd_rpi_hifiberry_dacplushd_driver);
 798 +
 799 +MODULE_AUTHOR("Joerg Schambacher <joerg@i2audio.com>");
 800 +MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+ HD");
 801 +MODULE_LICENSE("GPL v2");