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// SPDX-License-Identifier: GPL-2.0-only // // Common code for Cirrus side-codecs. // // Copyright (C) 2021, 2023 Cirrus Logic, Inc. and // Cirrus Logic International Semiconductor Ltd. #include <linux/dev_printk.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include "cirrus_scodec.h" int cirrus_scodec_get_speaker_id(struct device *dev, int amp_index, int num_amps, int fixed_gpio_id) { struct gpio_desc *speaker_id_desc; int speaker_id = -ENOENT; if (fixed_gpio_id >= 0) { dev_dbg(dev, "Found Fixed Speaker ID GPIO (index = %d)\n", fixed_gpio_id); speaker_id_desc = gpiod_get_index(dev, NULL, fixed_gpio_id, GPIOD_IN); if (IS_ERR(speaker_id_desc)) { speaker_id = PTR_ERR(speaker_id_desc); return speaker_id; } speaker_id = gpiod_get_value_cansleep(speaker_id_desc); gpiod_put(speaker_id_desc); } else { int base_index; int gpios_per_amp; int count; int tmp; int i; count = gpiod_count(dev, "spk-id"); if (count > 0) { speaker_id = 0; gpios_per_amp = count / num_amps; base_index = gpios_per_amp * amp_index; if (count % num_amps) return -EINVAL; dev_dbg(dev, "Found %d Speaker ID GPIOs per Amp\n", gpios_per_amp); for (i = 0; i < gpios_per_amp; i++) { speaker_id_desc = gpiod_get_index(dev, "spk-id", i + base_index, GPIOD_IN); if (IS_ERR(speaker_id_desc)) { speaker_id = PTR_ERR(speaker_id_desc); break; } tmp = gpiod_get_value_cansleep(speaker_id_desc); gpiod_put(speaker_id_desc); if (tmp < 0) { speaker_id = tmp; break; } speaker_id |= tmp << i; } } } dev_dbg(dev, "Speaker ID = %d\n", speaker_id); return speaker_id; } EXPORT_SYMBOL_NS_GPL(cirrus_scodec_get_speaker_id, "SND_HDA_CIRRUS_SCODEC"); MODULE_DESCRIPTION("HDA Cirrus side-codec library"); MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); MODULE_LICENSE("GPL");