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1// SPDX-License-Identifier: GPL-2.0-only2//3// Common code for Cirrus side-codecs.4//5// Copyright (C) 2021, 2023 Cirrus Logic, Inc. and6//               Cirrus Logic International Semiconductor Ltd.7 8#include <linux/dev_printk.h>9#include <linux/gpio/consumer.h>10#include <linux/module.h>11 12#include "cirrus_scodec.h"13 14int cirrus_scodec_get_speaker_id(struct device *dev, int amp_index,15				 int num_amps, int fixed_gpio_id)16{17	struct gpio_desc *speaker_id_desc;18	int speaker_id = -ENOENT;19 20	if (fixed_gpio_id >= 0) {21		dev_dbg(dev, "Found Fixed Speaker ID GPIO (index = %d)\n", fixed_gpio_id);22		speaker_id_desc = gpiod_get_index(dev, NULL, fixed_gpio_id, GPIOD_IN);23		if (IS_ERR(speaker_id_desc)) {24			speaker_id = PTR_ERR(speaker_id_desc);25			return speaker_id;26		}27		speaker_id = gpiod_get_value_cansleep(speaker_id_desc);28		gpiod_put(speaker_id_desc);29	} else {30		int base_index;31		int gpios_per_amp;32		int count;33		int tmp;34		int i;35 36		count = gpiod_count(dev, "spk-id");37		if (count > 0) {38			speaker_id = 0;39			gpios_per_amp = count / num_amps;40			base_index = gpios_per_amp * amp_index;41 42			if (count % num_amps)43				return -EINVAL;44 45			dev_dbg(dev, "Found %d Speaker ID GPIOs per Amp\n", gpios_per_amp);46 47			for (i = 0; i < gpios_per_amp; i++) {48				speaker_id_desc = gpiod_get_index(dev, "spk-id", i + base_index,49								  GPIOD_IN);50				if (IS_ERR(speaker_id_desc)) {51					speaker_id = PTR_ERR(speaker_id_desc);52					break;53				}54				tmp = gpiod_get_value_cansleep(speaker_id_desc);55				gpiod_put(speaker_id_desc);56				if (tmp < 0) {57					speaker_id = tmp;58					break;59				}60				speaker_id |= tmp << i;61			}62		}63	}64 65	dev_dbg(dev, "Speaker ID = %d\n", speaker_id);66 67	return speaker_id;68}69EXPORT_SYMBOL_NS_GPL(cirrus_scodec_get_speaker_id, SND_HDA_CIRRUS_SCODEC);70 71MODULE_DESCRIPTION("HDA Cirrus side-codec library");72MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");73MODULE_LICENSE("GPL");74