ASoC: tlv320aic3x: switch to using gpiod API
Switch the driver from legacy gpio API that is deprecated to the newer
gpiod API that respects line polarities described in ACPI/DT.
The driver still tries to support shared reset lines, by first trying to
allocate the reset GPIO normally, and then non-exclusively, although the
utility of such support is questionable, toggling reset line from one
driver/instance will result in all chips being reset, potentially at an
inopportune moment.
Note that this change depends on commit fbbbcd177a
("gpiolib: of: add
quirk for locating reset lines with legacy bindings") to translate
request for "reset" GPIO to the legacy name "gpio-reset" in case when
proper name is not used.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20221102232004.1721864-3-dmitry.torokhov@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
parent
426c7bf45f
commit
a984d8332d
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@ -32,12 +32,12 @@
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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@ -56,8 +56,6 @@ static const char *aic3x_supply_names[AIC3X_NUM_SUPPLIES] = {
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"DRVDD", /* ADC Analog and Output Driver Voltage */
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};
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static LIST_HEAD(reset_list);
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struct aic3x_priv;
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struct aic3x_disable_nb {
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@ -80,9 +78,9 @@ struct aic3x_priv {
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unsigned int dai_fmt;
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unsigned int tdm_delay;
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unsigned int slot_width;
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struct list_head list;
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int master;
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int gpio_reset;
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struct gpio_desc *gpio_reset;
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bool shared_reset;
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int power;
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u16 model;
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@ -1369,8 +1367,8 @@ static int aic3x_regulator_event(struct notifier_block *nb,
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* Put codec to reset and require cache sync as at least one
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* of the supplies was disabled
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*/
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if (gpio_is_valid(aic3x->gpio_reset))
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gpio_set_value(aic3x->gpio_reset, 0);
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if (aic3x->gpio_reset)
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gpiod_set_value(aic3x->gpio_reset, 1);
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regcache_mark_dirty(aic3x->regmap);
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}
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@ -1390,9 +1388,9 @@ static int aic3x_set_power(struct snd_soc_component *component, int power)
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goto out;
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aic3x->power = 1;
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if (gpio_is_valid(aic3x->gpio_reset)) {
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if (aic3x->gpio_reset) {
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udelay(1);
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gpio_set_value(aic3x->gpio_reset, 1);
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gpiod_set_value(aic3x->gpio_reset, 0);
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}
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/* Sync reg_cache with the hardware */
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@ -1598,19 +1596,6 @@ static int aic3x_init(struct snd_soc_component *component)
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return 0;
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}
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static bool aic3x_is_shared_reset(struct aic3x_priv *aic3x)
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{
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struct aic3x_priv *a;
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list_for_each_entry(a, &reset_list, list) {
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if (gpio_is_valid(aic3x->gpio_reset) &&
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aic3x->gpio_reset == a->gpio_reset)
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return true;
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}
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return false;
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}
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static int aic3x_component_probe(struct snd_soc_component *component)
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{
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struct aic3x_priv *aic3x = snd_soc_component_get_drvdata(component);
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@ -1775,19 +1760,6 @@ int aic3x_probe(struct device *dev, struct regmap *regmap, kernel_ulong_t driver
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if (!ai3x_setup)
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return -ENOMEM;
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ret = of_get_named_gpio(np, "reset-gpios", 0);
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if (ret >= 0) {
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aic3x->gpio_reset = ret;
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} else {
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ret = of_get_named_gpio(np, "gpio-reset", 0);
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if (ret > 0) {
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dev_warn(dev, "Using deprecated property \"gpio-reset\", please update your DT");
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aic3x->gpio_reset = ret;
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} else {
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aic3x->gpio_reset = -1;
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}
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}
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if (of_property_read_u32_array(np, "ai3x-gpio-func",
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ai3x_setup->gpio_func, 2) >= 0) {
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aic3x->setup = ai3x_setup;
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@ -1812,29 +1784,43 @@ int aic3x_probe(struct device *dev, struct regmap *regmap, kernel_ulong_t driver
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} else {
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aic3x->micbias_vg = AIC3X_MICBIAS_OFF;
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}
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} else {
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aic3x->gpio_reset = -1;
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}
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aic3x->model = driver_data;
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if (gpio_is_valid(aic3x->gpio_reset) &&
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!aic3x_is_shared_reset(aic3x)) {
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ret = gpio_request(aic3x->gpio_reset, "tlv320aic3x reset");
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if (ret != 0)
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goto err;
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gpio_direction_output(aic3x->gpio_reset, 0);
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aic3x->gpio_reset = devm_gpiod_get_optional(dev, "reset",
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GPIOD_OUT_HIGH);
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ret = PTR_ERR_OR_ZERO(aic3x->gpio_reset);
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if (ret) {
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if (ret != -EBUSY)
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return ret;
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/*
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* Apparently there are setups where the codec is sharing
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* its reset line. Try to get it non-exclusively, although
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* the utility of this is unclear: how do we make sure that
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* resetting one chip will not disturb the others that share
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* the same line?
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*/
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aic3x->gpio_reset = devm_gpiod_get(dev, "reset",
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GPIOD_ASIS | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
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ret = PTR_ERR_OR_ZERO(aic3x->gpio_reset);
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if (ret)
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return ret;
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aic3x->shared_reset = true;
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}
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gpiod_set_consumer_name(aic3x->gpio_reset, "tlv320aic3x reset");
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for (i = 0; i < ARRAY_SIZE(aic3x->supplies); i++)
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aic3x->supplies[i].supply = aic3x_supply_names[i];
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ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(aic3x->supplies),
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aic3x->supplies);
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if (ret != 0) {
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if (ret) {
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dev_err(dev, "Failed to request supplies: %d\n", ret);
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goto err_gpio;
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return ret;
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}
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aic3x_configure_ocmv(dev, aic3x);
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@ -1843,26 +1829,14 @@ int aic3x_probe(struct device *dev, struct regmap *regmap, kernel_ulong_t driver
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ret = regmap_register_patch(aic3x->regmap, aic3007_class_d,
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ARRAY_SIZE(aic3007_class_d));
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if (ret != 0)
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dev_err(dev, "Failed to init class D: %d\n",
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ret);
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dev_err(dev, "Failed to init class D: %d\n", ret);
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}
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ret = devm_snd_soc_register_component(dev, &soc_component_dev_aic3x, &aic3x_dai, 1);
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if (ret != 0)
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goto err_gpio;
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INIT_LIST_HEAD(&aic3x->list);
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list_add(&aic3x->list, &reset_list);
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if (ret)
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return ret;
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return 0;
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err_gpio:
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if (gpio_is_valid(aic3x->gpio_reset) &&
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!aic3x_is_shared_reset(aic3x))
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gpio_free(aic3x->gpio_reset);
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err:
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return ret;
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}
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EXPORT_SYMBOL(aic3x_probe);
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@ -1870,13 +1844,9 @@ void aic3x_remove(struct device *dev)
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{
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struct aic3x_priv *aic3x = dev_get_drvdata(dev);
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list_del(&aic3x->list);
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if (gpio_is_valid(aic3x->gpio_reset) &&
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!aic3x_is_shared_reset(aic3x)) {
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gpio_set_value(aic3x->gpio_reset, 0);
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gpio_free(aic3x->gpio_reset);
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}
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/* Leave the codec in reset state */
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if (aic3x->gpio_reset && !aic3x->shared_reset)
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gpiod_set_value(aic3x->gpio_reset, 1);
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}
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EXPORT_SYMBOL(aic3x_remove);
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