1 // SPDX-License-Identifier: GPL-2.0
3 * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier
5 * Copyright (C) 2016-2017 Texas Instruments Incorporated - http://www.ti.com/
6 * Author: Andreas Dannenberg <dannenberg@ti.com>
7 * Andrew F. Davis <afd@ti.com>
10 #include <linux/module.h>
11 #include <linux/errno.h>
12 #include <linux/device.h>
13 #include <linux/i2c.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/regmap.h>
16 #include <linux/slab.h>
17 #include <linux/regulator/consumer.h>
18 #include <linux/delay.h>
19 #include <linux/gpio/consumer.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 #include <sound/soc-dapm.h>
25 #include <sound/tlv.h>
29 /* Define how often to check (and clear) the fault status register (in ms) */
30 #define TAS6424_FAULT_CHECK_INTERVAL 200
32 static const char * const tas6424_supply_names
[] = {
33 "dvdd", /* Digital power supply. Connect to 3.3-V supply. */
34 "vbat", /* Supply used for higher voltage analog circuits. */
35 "pvdd", /* Class-D amp output FETs supply. */
37 #define TAS6424_NUM_SUPPLIES ARRAY_SIZE(tas6424_supply_names)
41 struct regmap
*regmap
;
42 struct regulator_bulk_data supplies
[TAS6424_NUM_SUPPLIES
];
43 struct delayed_work fault_check_work
;
44 unsigned int last_fault1
;
45 unsigned int last_fault2
;
46 unsigned int last_warn
;
47 struct gpio_desc
*standby_gpio
;
48 struct gpio_desc
*mute_gpio
;
52 * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that
53 * setting the gain below -100 dB (register value <0x7) is effectively a MUTE
54 * as per device datasheet.
56 static DECLARE_TLV_DB_SCALE(dac_tlv
, -10350, 50, 0);
58 static const struct snd_kcontrol_new tas6424_snd_controls
[] = {
59 SOC_SINGLE_TLV("Speaker Driver CH1 Playback Volume",
60 TAS6424_CH1_VOL_CTRL
, 0, 0xff, 0, dac_tlv
),
61 SOC_SINGLE_TLV("Speaker Driver CH2 Playback Volume",
62 TAS6424_CH2_VOL_CTRL
, 0, 0xff, 0, dac_tlv
),
63 SOC_SINGLE_TLV("Speaker Driver CH3 Playback Volume",
64 TAS6424_CH3_VOL_CTRL
, 0, 0xff, 0, dac_tlv
),
65 SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume",
66 TAS6424_CH4_VOL_CTRL
, 0, 0xff, 0, dac_tlv
),
67 SOC_SINGLE_STROBE("Auto Diagnostics Switch", TAS6424_DC_DIAG_CTRL1
,
68 TAS6424_LDGBYPASS_SHIFT
, 1),
71 static int tas6424_dac_event(struct snd_soc_dapm_widget
*w
,
72 struct snd_kcontrol
*kcontrol
, int event
)
74 struct snd_soc_component
*component
= snd_soc_dapm_to_component(w
->dapm
);
75 struct tas6424_data
*tas6424
= snd_soc_component_get_drvdata(component
);
77 dev_dbg(component
->dev
, "%s() event=0x%0x\n", __func__
, event
);
79 if (event
& SND_SOC_DAPM_POST_PMU
) {
80 /* Observe codec shutdown-to-active time */
83 /* Turn on TAS6424 periodic fault checking/handling */
84 tas6424
->last_fault1
= 0;
85 tas6424
->last_fault2
= 0;
86 tas6424
->last_warn
= 0;
87 schedule_delayed_work(&tas6424
->fault_check_work
,
88 msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL
));
89 } else if (event
& SND_SOC_DAPM_PRE_PMD
) {
90 /* Disable TAS6424 periodic fault checking/handling */
91 cancel_delayed_work_sync(&tas6424
->fault_check_work
);
97 static const struct snd_soc_dapm_widget tas6424_dapm_widgets
[] = {
98 SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM
, 0, 0),
99 SND_SOC_DAPM_DAC_E("DAC", NULL
, SND_SOC_NOPM
, 0, 0, tas6424_dac_event
,
100 SND_SOC_DAPM_POST_PMU
| SND_SOC_DAPM_PRE_PMD
),
101 SND_SOC_DAPM_OUTPUT("OUT")
104 static const struct snd_soc_dapm_route tas6424_audio_map
[] = {
105 { "DAC", NULL
, "DAC IN" },
106 { "OUT", NULL
, "DAC" },
109 static int tas6424_hw_params(struct snd_pcm_substream
*substream
,
110 struct snd_pcm_hw_params
*params
,
111 struct snd_soc_dai
*dai
)
113 struct snd_soc_component
*component
= dai
->component
;
114 unsigned int rate
= params_rate(params
);
115 unsigned int width
= params_width(params
);
118 dev_dbg(component
->dev
, "%s() rate=%u width=%u\n", __func__
, rate
, width
);
122 sap_ctrl
|= TAS6424_SAP_RATE_44100
;
125 sap_ctrl
|= TAS6424_SAP_RATE_48000
;
128 sap_ctrl
|= TAS6424_SAP_RATE_96000
;
131 dev_err(component
->dev
, "unsupported sample rate: %u\n", rate
);
137 sap_ctrl
|= TAS6424_SAP_TDM_SLOT_SZ_16
;
142 dev_err(component
->dev
, "unsupported sample width: %u\n", width
);
146 snd_soc_component_update_bits(component
, TAS6424_SAP_CTRL
,
147 TAS6424_SAP_RATE_MASK
|
148 TAS6424_SAP_TDM_SLOT_SZ_16
,
154 static int tas6424_set_dai_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
156 struct snd_soc_component
*component
= dai
->component
;
157 u8 serial_format
= 0;
159 dev_dbg(component
->dev
, "%s() fmt=0x%0x\n", __func__
, fmt
);
162 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
163 case SND_SOC_DAIFMT_CBS_CFS
:
166 dev_err(component
->dev
, "Invalid DAI master/slave interface\n");
170 /* signal polarity */
171 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
172 case SND_SOC_DAIFMT_NB_NF
:
175 dev_err(component
->dev
, "Invalid DAI clock signal polarity\n");
179 /* interface format */
180 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
181 case SND_SOC_DAIFMT_I2S
:
182 serial_format
|= TAS6424_SAP_I2S
;
184 case SND_SOC_DAIFMT_DSP_A
:
185 serial_format
|= TAS6424_SAP_DSP
;
187 case SND_SOC_DAIFMT_DSP_B
:
189 * We can use the fact that the TAS6424 does not care about the
190 * LRCLK duty cycle during TDM to receive DSP_B formatted data
191 * in LEFTJ mode (no delaying of the 1st data bit).
193 serial_format
|= TAS6424_SAP_LEFTJ
;
195 case SND_SOC_DAIFMT_LEFT_J
:
196 serial_format
|= TAS6424_SAP_LEFTJ
;
199 dev_err(component
->dev
, "Invalid DAI interface format\n");
203 snd_soc_component_update_bits(component
, TAS6424_SAP_CTRL
,
204 TAS6424_SAP_FMT_MASK
, serial_format
);
209 static int tas6424_set_dai_tdm_slot(struct snd_soc_dai
*dai
,
210 unsigned int tx_mask
, unsigned int rx_mask
,
211 int slots
, int slot_width
)
213 struct snd_soc_component
*component
= dai
->component
;
214 unsigned int first_slot
, last_slot
;
215 bool sap_tdm_slot_last
;
217 dev_dbg(component
->dev
, "%s() tx_mask=%d rx_mask=%d\n", __func__
,
220 if (!tx_mask
|| !rx_mask
)
221 return 0; /* nothing needed to disable TDM mode */
224 * Determine the first slot and last slot that is being requested so
225 * we'll be able to more easily enforce certain constraints as the
226 * TAS6424's TDM interface is not fully configurable.
228 first_slot
= __ffs(tx_mask
);
229 last_slot
= __fls(rx_mask
);
231 if (last_slot
- first_slot
!= 4) {
232 dev_err(component
->dev
, "tdm mask must cover 4 contiguous slots\n");
236 switch (first_slot
) {
238 sap_tdm_slot_last
= false;
241 sap_tdm_slot_last
= true;
244 dev_err(component
->dev
, "tdm mask must start at slot 0 or 4\n");
248 snd_soc_component_update_bits(component
, TAS6424_SAP_CTRL
, TAS6424_SAP_TDM_SLOT_LAST
,
249 sap_tdm_slot_last
? TAS6424_SAP_TDM_SLOT_LAST
: 0);
254 static int tas6424_mute(struct snd_soc_dai
*dai
, int mute
)
256 struct snd_soc_component
*component
= dai
->component
;
257 struct tas6424_data
*tas6424
= snd_soc_component_get_drvdata(component
);
260 dev_dbg(component
->dev
, "%s() mute=%d\n", __func__
, mute
);
262 if (tas6424
->mute_gpio
) {
263 gpiod_set_value_cansleep(tas6424
->mute_gpio
, mute
);
268 val
= TAS6424_ALL_STATE_MUTE
;
270 val
= TAS6424_ALL_STATE_PLAY
;
272 snd_soc_component_write(component
, TAS6424_CH_STATE_CTRL
, val
);
277 static int tas6424_power_off(struct snd_soc_component
*component
)
279 struct tas6424_data
*tas6424
= snd_soc_component_get_drvdata(component
);
282 snd_soc_component_write(component
, TAS6424_CH_STATE_CTRL
, TAS6424_ALL_STATE_HIZ
);
284 regcache_cache_only(tas6424
->regmap
, true);
285 regcache_mark_dirty(tas6424
->regmap
);
287 ret
= regulator_bulk_disable(ARRAY_SIZE(tas6424
->supplies
),
290 dev_err(component
->dev
, "failed to disable supplies: %d\n", ret
);
297 static int tas6424_power_on(struct snd_soc_component
*component
)
299 struct tas6424_data
*tas6424
= snd_soc_component_get_drvdata(component
);
302 int no_auto_diags
= 0;
303 unsigned int reg_val
;
305 if (!regmap_read(tas6424
->regmap
, TAS6424_DC_DIAG_CTRL1
, ®_val
))
306 no_auto_diags
= reg_val
& TAS6424_LDGBYPASS_MASK
;
308 ret
= regulator_bulk_enable(ARRAY_SIZE(tas6424
->supplies
),
311 dev_err(component
->dev
, "failed to enable supplies: %d\n", ret
);
315 regcache_cache_only(tas6424
->regmap
, false);
317 ret
= regcache_sync(tas6424
->regmap
);
319 dev_err(component
->dev
, "failed to sync regcache: %d\n", ret
);
323 if (tas6424
->mute_gpio
) {
324 gpiod_set_value_cansleep(tas6424
->mute_gpio
, 0);
326 * channels are muted via the mute pin. Don't also mute
327 * them via the registers so that subsequent register
328 * access is not necessary to un-mute the channels
330 chan_states
= TAS6424_ALL_STATE_PLAY
;
332 chan_states
= TAS6424_ALL_STATE_MUTE
;
334 snd_soc_component_write(component
, TAS6424_CH_STATE_CTRL
, chan_states
);
336 /* any time we come out of HIZ, the output channels automatically run DC
337 * load diagnostics if autodiagnotics are enabled. wait here until this
346 static int tas6424_set_bias_level(struct snd_soc_component
*component
,
347 enum snd_soc_bias_level level
)
349 dev_dbg(component
->dev
, "%s() level=%d\n", __func__
, level
);
352 case SND_SOC_BIAS_ON
:
353 case SND_SOC_BIAS_PREPARE
:
355 case SND_SOC_BIAS_STANDBY
:
356 if (snd_soc_component_get_bias_level(component
) == SND_SOC_BIAS_OFF
)
357 tas6424_power_on(component
);
359 case SND_SOC_BIAS_OFF
:
360 tas6424_power_off(component
);
367 static struct snd_soc_component_driver soc_codec_dev_tas6424
= {
368 .set_bias_level
= tas6424_set_bias_level
,
369 .controls
= tas6424_snd_controls
,
370 .num_controls
= ARRAY_SIZE(tas6424_snd_controls
),
371 .dapm_widgets
= tas6424_dapm_widgets
,
372 .num_dapm_widgets
= ARRAY_SIZE(tas6424_dapm_widgets
),
373 .dapm_routes
= tas6424_audio_map
,
374 .num_dapm_routes
= ARRAY_SIZE(tas6424_audio_map
),
375 .use_pmdown_time
= 1,
377 .non_legacy_dai_naming
= 1,
380 static struct snd_soc_dai_ops tas6424_speaker_dai_ops
= {
381 .hw_params
= tas6424_hw_params
,
382 .set_fmt
= tas6424_set_dai_fmt
,
383 .set_tdm_slot
= tas6424_set_dai_tdm_slot
,
384 .digital_mute
= tas6424_mute
,
387 static struct snd_soc_dai_driver tas6424_dai
[] = {
389 .name
= "tas6424-amplifier",
391 .stream_name
= "Playback",
394 .rates
= TAS6424_RATES
,
395 .formats
= TAS6424_FORMATS
,
397 .ops
= &tas6424_speaker_dai_ops
,
401 static void tas6424_fault_check_work(struct work_struct
*work
)
403 struct tas6424_data
*tas6424
= container_of(work
, struct tas6424_data
,
404 fault_check_work
.work
);
405 struct device
*dev
= tas6424
->dev
;
409 ret
= regmap_read(tas6424
->regmap
, TAS6424_GLOB_FAULT1
, ®
);
411 dev_err(dev
, "failed to read FAULT1 register: %d\n", ret
);
416 * Ignore any clock faults as there is no clean way to check for them.
417 * We would need to start checking for those faults *after* the SAIF
418 * stream has been setup, and stop checking *before* the stream is
419 * stopped to avoid any false-positives. However there are no
420 * appropriate hooks to monitor these events.
422 reg
&= TAS6424_FAULT_PVDD_OV
|
423 TAS6424_FAULT_VBAT_OV
|
424 TAS6424_FAULT_PVDD_UV
|
425 TAS6424_FAULT_VBAT_UV
;
428 goto check_global_fault2_reg
;
431 * Only flag errors once for a given occurrence. This is needed as
432 * the TAS6424 will take time clearing the fault condition internally
433 * during which we don't want to bombard the system with the same
434 * error message over and over.
436 if ((reg
& TAS6424_FAULT_PVDD_OV
) && !(tas6424
->last_fault1
& TAS6424_FAULT_PVDD_OV
))
437 dev_crit(dev
, "experienced a PVDD overvoltage fault\n");
439 if ((reg
& TAS6424_FAULT_VBAT_OV
) && !(tas6424
->last_fault1
& TAS6424_FAULT_VBAT_OV
))
440 dev_crit(dev
, "experienced a VBAT overvoltage fault\n");
442 if ((reg
& TAS6424_FAULT_PVDD_UV
) && !(tas6424
->last_fault1
& TAS6424_FAULT_PVDD_UV
))
443 dev_crit(dev
, "experienced a PVDD undervoltage fault\n");
445 if ((reg
& TAS6424_FAULT_VBAT_UV
) && !(tas6424
->last_fault1
& TAS6424_FAULT_VBAT_UV
))
446 dev_crit(dev
, "experienced a VBAT undervoltage fault\n");
448 /* Store current fault1 value so we can detect any changes next time */
449 tas6424
->last_fault1
= reg
;
451 check_global_fault2_reg
:
452 ret
= regmap_read(tas6424
->regmap
, TAS6424_GLOB_FAULT2
, ®
);
454 dev_err(dev
, "failed to read FAULT2 register: %d\n", ret
);
458 reg
&= TAS6424_FAULT_OTSD
|
459 TAS6424_FAULT_OTSD_CH1
|
460 TAS6424_FAULT_OTSD_CH2
|
461 TAS6424_FAULT_OTSD_CH3
|
462 TAS6424_FAULT_OTSD_CH4
;
467 if ((reg
& TAS6424_FAULT_OTSD
) && !(tas6424
->last_fault2
& TAS6424_FAULT_OTSD
))
468 dev_crit(dev
, "experienced a global overtemp shutdown\n");
470 if ((reg
& TAS6424_FAULT_OTSD_CH1
) && !(tas6424
->last_fault2
& TAS6424_FAULT_OTSD_CH1
))
471 dev_crit(dev
, "experienced an overtemp shutdown on CH1\n");
473 if ((reg
& TAS6424_FAULT_OTSD_CH2
) && !(tas6424
->last_fault2
& TAS6424_FAULT_OTSD_CH2
))
474 dev_crit(dev
, "experienced an overtemp shutdown on CH2\n");
476 if ((reg
& TAS6424_FAULT_OTSD_CH3
) && !(tas6424
->last_fault2
& TAS6424_FAULT_OTSD_CH3
))
477 dev_crit(dev
, "experienced an overtemp shutdown on CH3\n");
479 if ((reg
& TAS6424_FAULT_OTSD_CH4
) && !(tas6424
->last_fault2
& TAS6424_FAULT_OTSD_CH4
))
480 dev_crit(dev
, "experienced an overtemp shutdown on CH4\n");
482 /* Store current fault2 value so we can detect any changes next time */
483 tas6424
->last_fault2
= reg
;
486 ret
= regmap_read(tas6424
->regmap
, TAS6424_WARN
, ®
);
488 dev_err(dev
, "failed to read WARN register: %d\n", ret
);
492 reg
&= TAS6424_WARN_VDD_UV
|
493 TAS6424_WARN_VDD_POR
|
494 TAS6424_WARN_VDD_OTW
|
495 TAS6424_WARN_VDD_OTW_CH1
|
496 TAS6424_WARN_VDD_OTW_CH2
|
497 TAS6424_WARN_VDD_OTW_CH3
|
498 TAS6424_WARN_VDD_OTW_CH4
;
503 if ((reg
& TAS6424_WARN_VDD_UV
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_UV
))
504 dev_warn(dev
, "experienced a VDD under voltage condition\n");
506 if ((reg
& TAS6424_WARN_VDD_POR
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_POR
))
507 dev_warn(dev
, "experienced a VDD POR condition\n");
509 if ((reg
& TAS6424_WARN_VDD_OTW
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_OTW
))
510 dev_warn(dev
, "experienced a global overtemp warning\n");
512 if ((reg
& TAS6424_WARN_VDD_OTW_CH1
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_OTW_CH1
))
513 dev_warn(dev
, "experienced an overtemp warning on CH1\n");
515 if ((reg
& TAS6424_WARN_VDD_OTW_CH2
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_OTW_CH2
))
516 dev_warn(dev
, "experienced an overtemp warning on CH2\n");
518 if ((reg
& TAS6424_WARN_VDD_OTW_CH3
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_OTW_CH3
))
519 dev_warn(dev
, "experienced an overtemp warning on CH3\n");
521 if ((reg
& TAS6424_WARN_VDD_OTW_CH4
) && !(tas6424
->last_warn
& TAS6424_WARN_VDD_OTW_CH4
))
522 dev_warn(dev
, "experienced an overtemp warning on CH4\n");
524 /* Store current warn value so we can detect any changes next time */
525 tas6424
->last_warn
= reg
;
527 /* Clear any faults by toggling the CLEAR_FAULT control bit */
528 ret
= regmap_write_bits(tas6424
->regmap
, TAS6424_MISC_CTRL3
,
529 TAS6424_CLEAR_FAULT
, TAS6424_CLEAR_FAULT
);
531 dev_err(dev
, "failed to write MISC_CTRL3 register: %d\n", ret
);
533 ret
= regmap_write_bits(tas6424
->regmap
, TAS6424_MISC_CTRL3
,
534 TAS6424_CLEAR_FAULT
, 0);
536 dev_err(dev
, "failed to write MISC_CTRL3 register: %d\n", ret
);
539 /* Schedule the next fault check at the specified interval */
540 schedule_delayed_work(&tas6424
->fault_check_work
,
541 msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL
));
544 static const struct reg_default tas6424_reg_defaults
[] = {
545 { TAS6424_MODE_CTRL
, 0x00 },
546 { TAS6424_MISC_CTRL1
, 0x32 },
547 { TAS6424_MISC_CTRL2
, 0x62 },
548 { TAS6424_SAP_CTRL
, 0x04 },
549 { TAS6424_CH_STATE_CTRL
, 0x55 },
550 { TAS6424_CH1_VOL_CTRL
, 0xcf },
551 { TAS6424_CH2_VOL_CTRL
, 0xcf },
552 { TAS6424_CH3_VOL_CTRL
, 0xcf },
553 { TAS6424_CH4_VOL_CTRL
, 0xcf },
554 { TAS6424_DC_DIAG_CTRL1
, 0x00 },
555 { TAS6424_DC_DIAG_CTRL2
, 0x11 },
556 { TAS6424_DC_DIAG_CTRL3
, 0x11 },
557 { TAS6424_PIN_CTRL
, 0xff },
558 { TAS6424_AC_DIAG_CTRL1
, 0x00 },
559 { TAS6424_MISC_CTRL3
, 0x00 },
560 { TAS6424_CLIP_CTRL
, 0x01 },
561 { TAS6424_CLIP_WINDOW
, 0x14 },
562 { TAS6424_CLIP_WARN
, 0x00 },
563 { TAS6424_CBC_STAT
, 0x00 },
564 { TAS6424_MISC_CTRL4
, 0x40 },
567 static bool tas6424_is_writable_reg(struct device
*dev
, unsigned int reg
)
570 case TAS6424_MODE_CTRL
:
571 case TAS6424_MISC_CTRL1
:
572 case TAS6424_MISC_CTRL2
:
573 case TAS6424_SAP_CTRL
:
574 case TAS6424_CH_STATE_CTRL
:
575 case TAS6424_CH1_VOL_CTRL
:
576 case TAS6424_CH2_VOL_CTRL
:
577 case TAS6424_CH3_VOL_CTRL
:
578 case TAS6424_CH4_VOL_CTRL
:
579 case TAS6424_DC_DIAG_CTRL1
:
580 case TAS6424_DC_DIAG_CTRL2
:
581 case TAS6424_DC_DIAG_CTRL3
:
582 case TAS6424_PIN_CTRL
:
583 case TAS6424_AC_DIAG_CTRL1
:
584 case TAS6424_MISC_CTRL3
:
585 case TAS6424_CLIP_CTRL
:
586 case TAS6424_CLIP_WINDOW
:
587 case TAS6424_CLIP_WARN
:
588 case TAS6424_CBC_STAT
:
589 case TAS6424_MISC_CTRL4
:
596 static bool tas6424_is_volatile_reg(struct device
*dev
, unsigned int reg
)
599 case TAS6424_DC_LOAD_DIAG_REP12
:
600 case TAS6424_DC_LOAD_DIAG_REP34
:
601 case TAS6424_DC_LOAD_DIAG_REPLO
:
602 case TAS6424_CHANNEL_STATE
:
603 case TAS6424_CHANNEL_FAULT
:
604 case TAS6424_GLOB_FAULT1
:
605 case TAS6424_GLOB_FAULT2
:
607 case TAS6424_AC_LOAD_DIAG_REP1
:
608 case TAS6424_AC_LOAD_DIAG_REP2
:
609 case TAS6424_AC_LOAD_DIAG_REP3
:
610 case TAS6424_AC_LOAD_DIAG_REP4
:
617 static const struct regmap_config tas6424_regmap_config
= {
621 .writeable_reg
= tas6424_is_writable_reg
,
622 .volatile_reg
= tas6424_is_volatile_reg
,
624 .max_register
= TAS6424_MAX
,
625 .reg_defaults
= tas6424_reg_defaults
,
626 .num_reg_defaults
= ARRAY_SIZE(tas6424_reg_defaults
),
627 .cache_type
= REGCACHE_RBTREE
,
630 #if IS_ENABLED(CONFIG_OF)
631 static const struct of_device_id tas6424_of_ids
[] = {
632 { .compatible
= "ti,tas6424", },
635 MODULE_DEVICE_TABLE(of
, tas6424_of_ids
);
638 static int tas6424_i2c_probe(struct i2c_client
*client
,
639 const struct i2c_device_id
*id
)
641 struct device
*dev
= &client
->dev
;
642 struct tas6424_data
*tas6424
;
646 tas6424
= devm_kzalloc(dev
, sizeof(*tas6424
), GFP_KERNEL
);
649 dev_set_drvdata(dev
, tas6424
);
653 tas6424
->regmap
= devm_regmap_init_i2c(client
, &tas6424_regmap_config
);
654 if (IS_ERR(tas6424
->regmap
)) {
655 ret
= PTR_ERR(tas6424
->regmap
);
656 dev_err(dev
, "unable to allocate register map: %d\n", ret
);
661 * Get control of the standby pin and set it LOW to take the codec
662 * out of the stand-by mode.
663 * Note: The actual pin polarity is taken care of in the GPIO lib
664 * according the polarity specified in the DTS.
666 tas6424
->standby_gpio
= devm_gpiod_get_optional(dev
, "standby",
668 if (IS_ERR(tas6424
->standby_gpio
)) {
669 if (PTR_ERR(tas6424
->standby_gpio
) == -EPROBE_DEFER
)
670 return -EPROBE_DEFER
;
671 dev_info(dev
, "failed to get standby GPIO: %ld\n",
672 PTR_ERR(tas6424
->standby_gpio
));
673 tas6424
->standby_gpio
= NULL
;
677 * Get control of the mute pin and set it HIGH in order to start with
678 * all the output muted.
679 * Note: The actual pin polarity is taken care of in the GPIO lib
680 * according the polarity specified in the DTS.
682 tas6424
->mute_gpio
= devm_gpiod_get_optional(dev
, "mute",
684 if (IS_ERR(tas6424
->mute_gpio
)) {
685 if (PTR_ERR(tas6424
->mute_gpio
) == -EPROBE_DEFER
)
686 return -EPROBE_DEFER
;
687 dev_info(dev
, "failed to get nmute GPIO: %ld\n",
688 PTR_ERR(tas6424
->mute_gpio
));
689 tas6424
->mute_gpio
= NULL
;
692 for (i
= 0; i
< ARRAY_SIZE(tas6424
->supplies
); i
++)
693 tas6424
->supplies
[i
].supply
= tas6424_supply_names
[i
];
694 ret
= devm_regulator_bulk_get(dev
, ARRAY_SIZE(tas6424
->supplies
),
697 dev_err(dev
, "unable to request supplies: %d\n", ret
);
701 ret
= regulator_bulk_enable(ARRAY_SIZE(tas6424
->supplies
),
704 dev_err(dev
, "unable to enable supplies: %d\n", ret
);
708 /* Reset device to establish well-defined startup state */
709 ret
= regmap_update_bits(tas6424
->regmap
, TAS6424_MODE_CTRL
,
710 TAS6424_RESET
, TAS6424_RESET
);
712 dev_err(dev
, "unable to reset device: %d\n", ret
);
716 INIT_DELAYED_WORK(&tas6424
->fault_check_work
, tas6424_fault_check_work
);
718 ret
= devm_snd_soc_register_component(dev
, &soc_codec_dev_tas6424
,
719 tas6424_dai
, ARRAY_SIZE(tas6424_dai
));
721 dev_err(dev
, "unable to register codec: %d\n", ret
);
728 static int tas6424_i2c_remove(struct i2c_client
*client
)
730 struct device
*dev
= &client
->dev
;
731 struct tas6424_data
*tas6424
= dev_get_drvdata(dev
);
734 cancel_delayed_work_sync(&tas6424
->fault_check_work
);
736 /* put the codec in stand-by */
737 if (tas6424
->standby_gpio
)
738 gpiod_set_value_cansleep(tas6424
->standby_gpio
, 1);
740 ret
= regulator_bulk_disable(ARRAY_SIZE(tas6424
->supplies
),
743 dev_err(dev
, "unable to disable supplies: %d\n", ret
);
750 static const struct i2c_device_id tas6424_i2c_ids
[] = {
754 MODULE_DEVICE_TABLE(i2c
, tas6424_i2c_ids
);
756 static struct i2c_driver tas6424_i2c_driver
= {
759 .of_match_table
= of_match_ptr(tas6424_of_ids
),
761 .probe
= tas6424_i2c_probe
,
762 .remove
= tas6424_i2c_remove
,
763 .id_table
= tas6424_i2c_ids
,
765 module_i2c_driver(tas6424_i2c_driver
);
767 MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
768 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
769 MODULE_DESCRIPTION("TAS6424 Audio amplifier driver");
770 MODULE_LICENSE("GPL v2");