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Subject[PATCH 3/4] ASoC: wm8904: extend device tree support
Date
From: Pierluigi Passaro <pierluigi.p@variscite.com>

The platform_data structure is not populated when using device trees.
This patch adds optional dts properties to allow populating it:
- gpio-cfg
- mic-cfg
- num-drc-cfgs
- drc-cfg-regs
- drc-cfg-names
- num-retune-mobile-cfgs
- retune-mobile-cfg-regs
- retune-mobile-cfg-names
- retune-mobile-cfg-rates

Signed-off-by: Pierluigi Passaro <pierluigi.p@variscite.com>
Signed-off-by: Alifer Moraes <alifer.m@variscite.com>
---
.../devicetree/bindings/sound/wm8904.txt | 53 ++++++++
sound/soc/codecs/wm8904.c | 113 +++++++++++++++++-
2 files changed, 164 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/wm8904.txt b/Documentation/devicetree/bindings/sound/wm8904.txt
index 66bf261423b9..e3bfd3ec2905 100644
--- a/Documentation/devicetree/bindings/sound/wm8904.txt
+++ b/Documentation/devicetree/bindings/sound/wm8904.txt
@@ -9,6 +9,40 @@ Required properties:
- clocks: reference to
<Documentation/devicetree/bindings/clock/clock-bindings.txt>

+Optional properties:
+
+ - gpio-cfg: Default registers value for R121/122/123/124 (GPIO Control).
+ The list must be 4 entries long. If absent, the registers are set to 0.
+ If any entry has the value 0xffff, the related register won't be set.
+
+ - mic-cfg: Default registers value for R6/R7 (Mic Bias Control).
+ The list must be 2 entries long. If absent, the registers are set to 0.
+
+ - num-drc-cfgs: Number of available DRC modes from drc-cfg-regs property
+
+ - drc-cfg-regs: Default registers value for R40/41/42/43 (DRC)
+ The list must be (4 x num-drc-cfgs) entries long.
+ If absent or incomplete, DRC is disabled.
+
+ - drc-cfg-names: List of strings for the available DRC modes.
+ The list must be (num-drc-cfgs) entries long.
+ If absent or incomplete, DRC is disabled.
+
+ - num-retune-mobile-cfgs: Number of retune modes available from
+ retune-mobile-cfg-regs property
+
+ - retune-mobile-cfg-regs: Default registers value for R134/.../157 (EQ)
+ The list must be (24 x num-retune-mobile-cfgs) entries long.
+ If absent or incomplete, retune is disabled.
+
+ - retune-mobile-cfg-names: List of strings for the available retune modes.
+ The list must be (num-retune-mobile-cfgs) entries long.
+ If absent or incomplete, retune is disabled.
+
+ - retune-mobile-cfg-rates: List of rates for the available retune modes.
+ The list must be (num-retune-mobile-cfgs) entries long.
+ If absent or incomplete, retune is disabled.
+
Pins on the device (for linking into audio routes):

* IN1L
@@ -30,4 +64,23 @@ codec: wm8904@1a {
reg = <0x1a>;
clocks = <&pck0>;
clock-names = "mclk";
+ num-drc-cfgs = <5>;
+ drc-cfg-names = "default", "peaklimiter", "tradition", "soft", "music";
+ drc-cfg-regs =
+ /* coded default: KNEE_IP = KNEE_OP = 0, HI_COMP = LO_COMP = 1 */
+ <0x01af 0x3248 0x0000 0x0000>,
+ /* coded default: KNEE_IP = -24, KNEE_OP = -6, HI_COMP = 1/4, LO_COMP = 1 */
+ <0x04af 0x324b 0x0010 0x0408>,
+ /* coded default: KNEE_IP = -42, KNEE_OP = -3, HI_COMP = 0, LO_COMP = 1 */
+ <0x04af 0x324b 0x0028 0x0704>,
+ /* coded default: KNEE_IP = -45, KNEE_OP = -9, HI_COMP = 1/8, LO_COMP = 1 */
+ <0x04af 0x324b 0x0018 0x078c>,
+ /* coded default: KNEE_IP = -30, KNEE_OP = -10.5, HI_COMP = 1/4, LO_COMP = 1 */
+ <0x04af 0x324b 0x0010 0x050e>;
+ gpio-cfg = <
+ 0x0018 /* GPIO1 => DMIC_CLK */
+ 0xffff /* GPIO2 => don't touch */
+ 0xffff /* GPIO3 => don't touch */
+ 0xffff /* GPIO4 => don't touch */
+ >;
};
diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c
index a02a77fef360..4121771db104 100644
--- a/sound/soc/codecs/wm8904.c
+++ b/sound/soc/codecs/wm8904.c
@@ -2162,6 +2162,110 @@ static const struct of_device_id wm8904_of_match[] = {
MODULE_DEVICE_TABLE(of, wm8904_of_match);
#endif

+static int wm8904_set_pdata_from_of(struct i2c_client *i2c,
+ struct wm8904_priv *wm8904)
+{
+ const struct device_node *np = i2c->dev.of_node;
+ struct wm8904_pdata *pdata;
+ bool drc_cfgs_is_valid = true;
+ bool retune_mobile_cfgs_is_valid = true;
+ int i, j, offset;
+ u32 val32;
+
+ pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ if (of_property_read_u32_array(np, "gpio-cfg", pdata->gpio_cfg,
+ ARRAY_SIZE(pdata->gpio_cfg))) {
+ dev_dbg(&i2c->dev, "No 'gpio-cfg' property found\n");
+ }
+
+ if (of_property_read_u32_array(np, "mic-cfg", pdata->mic_cfg,
+ ARRAY_SIZE(pdata->mic_cfg))) {
+ dev_dbg(&i2c->dev, "No 'mic-cfg' property found\n");
+ }
+
+ if (of_property_read_s32(np, "num-drc-cfgs", &pdata->num_drc_cfgs)) {
+ dev_dbg(&i2c->dev, "No 'num-drc-cfgs' property found\n");
+ } else if (pdata->num_drc_cfgs < 0) {
+ dev_err(&i2c->dev, "Negative 'num-drc-cfgs' property found\n");
+ pdata->num_drc_cfgs = 0;
+ } else if (pdata->num_drc_cfgs > 0) {
+ pdata->drc_cfgs = devm_kzalloc(&i2c->dev,
+ pdata->num_drc_cfgs * sizeof(struct wm8904_drc_cfg),
+ GFP_KERNEL);
+ for (i = 0; i < pdata->num_drc_cfgs && drc_cfgs_is_valid; i++) {
+ offset = i * WM8904_DRC_REGS;
+ for (j = 0; j < WM8904_DRC_REGS && drc_cfgs_is_valid; j++) {
+ if (of_property_read_u32_index(np,
+ "drc-cfg-regs",
+ offset + j,
+ &val32)) {
+ dev_err(&i2c->dev,
+ "Invalid 'drc-cfg-regs[%i,%i]' property found\n", i, j);
+ drc_cfgs_is_valid = false;
+ } else {
+ pdata->drc_cfgs[i].regs[j] = val32;
+ }
+ }
+ if (of_property_read_string_index(np, "drc-cfg-names", i,
+ &pdata->drc_cfgs[i].name)) {
+ dev_err(&i2c->dev,
+ "Invalid 'drc-cfg-names[%i]' property found\n", i);
+ drc_cfgs_is_valid = false;
+ }
+ }
+ }
+ if (!drc_cfgs_is_valid) {
+ pdata->num_drc_cfgs = 0;
+ }
+
+ if (of_property_read_s32(np, "num-retune-mobile-cfgs", &pdata->num_retune_mobile_cfgs)) {
+ dev_dbg(&i2c->dev, "No 'num-retune-mobile-cfgs' property found\n");
+ } else if (pdata->num_retune_mobile_cfgs < 0) {
+ dev_err(&i2c->dev, "Negative 'num-retune-mobile-cfgs' property found\n");
+ pdata->num_retune_mobile_cfgs = 0;
+ } else if (pdata->num_retune_mobile_cfgs > 0) {
+ pdata->retune_mobile_cfgs = devm_kzalloc(&i2c->dev,
+ pdata->num_retune_mobile_cfgs * sizeof(struct wm8904_retune_mobile_cfg),
+ GFP_KERNEL);
+ for (i = 0; i < pdata->num_retune_mobile_cfgs && retune_mobile_cfgs_is_valid; i++) {
+ offset = i * WM8904_EQ_REGS;
+ for (j = 0; j < WM8904_EQ_REGS && retune_mobile_cfgs_is_valid; j++) {
+ if (of_property_read_u32_index(np, "retune-mobile-cfg-regs",
+ offset + j, &val32)) {
+ dev_err(&i2c->dev,
+ "Invalid 'retune-mobile-cfg-regs[%i,%i]' property found\n",
+ i, j);
+ retune_mobile_cfgs_is_valid = false;
+ } else {
+ pdata->retune_mobile_cfgs[i].regs[j] = val32;
+ }
+ }
+ if (of_property_read_u32_index(np, "retune-mobile-cfg-rates", i,
+ &pdata->retune_mobile_cfgs[i].rate)) {
+ dev_err(&i2c->dev,
+ "Invalid 'retune-mobile-cfg-rates[%i]' property found\n", i);
+ retune_mobile_cfgs_is_valid = false;
+ }
+ if (of_property_read_string_index(np, "retune-mobile-cfg-names",
+ i, &pdata->retune_mobile_cfgs[i].name)) {
+ dev_err(&i2c->dev,
+ "Invalid 'retune-mobile-cfg-names[%i]' property found\n", i);
+ retune_mobile_cfgs_is_valid = false;
+ }
+ }
+ }
+ if (!retune_mobile_cfgs_is_valid) {
+ pdata->num_retune_mobile_cfgs = 0;
+ }
+
+ wm8904->pdata = pdata;
+
+ return 0;
+}
+
static int wm8904_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -2196,12 +2300,17 @@ static int wm8904_i2c_probe(struct i2c_client *i2c,
if (match == NULL)
return -EINVAL;
wm8904->devtype = (enum wm8904_type)match->data;
+ ret = wm8904_set_pdata_from_of(i2c, wm8904);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to set platform data from of: %d\n", ret);
+ return ret;
+ }
} else {
wm8904->devtype = id->driver_data;
+ wm8904->pdata = i2c->dev.platform_data;
}

i2c_set_clientdata(i2c, wm8904);
- wm8904->pdata = i2c->dev.platform_data;

for (i = 0; i < ARRAY_SIZE(wm8904->supplies); i++)
wm8904->supplies[i].supply = wm8904_supply_names[i];
@@ -2272,7 +2381,7 @@ static int wm8904_i2c_probe(struct i2c_client *i2c,
/* Apply configuration from the platform data. */
if (wm8904->pdata) {
for (i = 0; i < WM8904_GPIO_REGS; i++) {
- if (!wm8904->pdata->gpio_cfg[i])
+ if (wm8904->pdata->gpio_cfg[i] == 0xffff)
continue;

regmap_update_bits(wm8904->regmap,
--
2.25.1
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