Merge "ASoC: codecs: Add IRQ utils support based on regmap"
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191
asoc/codecs/wcd-irq.c
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191
asoc/codecs/wcd-irq.c
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/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/irq.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/slab.h>
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#include <linux/irqdomain.h>
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#include <linux/regmap.h>
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#include <asoc/wcd-irq.h>
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static int wcd_map_irq(struct wcd_irq_info *irq_info, int irq)
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{
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if (!irq_info) {
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pr_err("%s: Null IRQ handle\n", __func__);
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return -EINVAL;
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}
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return regmap_irq_get_virq(irq_info->irq_chip, irq);
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}
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/**
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* wcd_request_irq: Request a thread handler for the given IRQ
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* @irq_info: pointer to IRQ info structure
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* @irq: irq number
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* @name: name for the IRQ thread
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* @handler: irq handler
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* @data: data pointer
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*
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* Returns 0 on success or error on failure
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*/
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int wcd_request_irq(struct wcd_irq_info *irq_info, int irq, const char *name,
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irq_handler_t handler, void *data)
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{
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if (!irq_info) {
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pr_err("%s: Null IRQ handle\n", __func__);
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return -EINVAL;
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}
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irq = wcd_map_irq(irq_info, irq);
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if (irq < 0)
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return irq;
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return request_threaded_irq(irq, NULL, handler,
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IRQF_ONESHOT | IRQF_TRIGGER_RISING,
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name, data);
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}
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EXPORT_SYMBOL(wcd_request_irq);
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/**
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* wcd_free_irq: Free the IRQ resources allocated during request_irq
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* @irq_info: pointer to IRQ info structure
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* @irq: irq number
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* @data: data pointer
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*/
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void wcd_free_irq(struct wcd_irq_info *irq_info, int irq, void *data)
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{
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if (!irq_info) {
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pr_err("%s: Null IRQ handle\n", __func__);
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return;
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}
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irq = wcd_map_irq(irq_info, irq);
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if (irq < 0)
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return;
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free_irq(irq, data);
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}
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EXPORT_SYMBOL(wcd_free_irq);
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/**
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* wcd_enable_irq: Enable the given IRQ
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* @irq_info: pointer to IRQ info structure
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* @irq: irq number
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*/
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void wcd_enable_irq(struct wcd_irq_info *irq_info, int irq)
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{
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if (!irq_info)
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pr_err("%s: Null IRQ handle\n", __func__);
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else
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enable_irq(wcd_map_irq(irq_info, irq));
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}
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EXPORT_SYMBOL(wcd_enable_irq);
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/**
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* wcd_disable_irq: Disable the given IRQ
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* @irq_info: pointer to IRQ info structure
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* @irq: irq number
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*/
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void wcd_disable_irq(struct wcd_irq_info *irq_info, int irq)
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{
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if (!irq_info)
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pr_err("%s: Null IRQ handle\n", __func__);
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else
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disable_irq(wcd_map_irq(irq_info, irq));
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}
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EXPORT_SYMBOL(wcd_disable_irq);
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static void wcd_irq_chip_disable(struct irq_data *data)
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{
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}
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static void wcd_irq_chip_enable(struct irq_data *data)
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{
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}
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static struct irq_chip wcd_irq_chip = {
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.name = NULL,
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.irq_disable = wcd_irq_chip_disable,
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.irq_enable = wcd_irq_chip_enable,
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};
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static struct lock_class_key wcd_irq_lock_class;
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static int wcd_irq_chip_map(struct irq_domain *irqd, unsigned int virq,
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irq_hw_number_t hw)
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{
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irq_set_chip_and_handler(virq, &wcd_irq_chip, handle_simple_irq);
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irq_set_lockdep_class(virq, &wcd_irq_lock_class);
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irq_set_nested_thread(virq, 1);
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irq_set_noprobe(virq);
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return 0;
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}
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static const struct irq_domain_ops wcd_domain_ops = {
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.map = wcd_irq_chip_map,
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};
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/**
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* wcd_irq_init: Initializes IRQ module
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* @irq_info: pointer to IRQ info structure
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*
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* Returns 0 on success or error on failure
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*/
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int wcd_irq_init(struct wcd_irq_info *irq_info, struct irq_domain **virq)
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{
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int ret = 0;
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if (!irq_info) {
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pr_err("%s: Null IRQ handle\n", __func__);
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return -EINVAL;
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}
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wcd_irq_chip.name = irq_info->codec_name;
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*virq = irq_domain_add_linear(NULL, 1, &wcd_domain_ops, NULL);
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if (!(*virq)) {
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pr_err("%s: Failed to add IRQ domain\n", __func__);
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return -EINVAL;
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}
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ret = devm_regmap_add_irq_chip(irq_info->dev, irq_info->regmap,
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irq_create_mapping(*virq, 0),
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IRQF_ONESHOT, 0, irq_info->wcd_regmap_irq_chip,
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&irq_info->irq_chip);
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if (ret)
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pr_err("%s: Failed to add IRQs: %d\n",
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__func__, ret);
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return ret;
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}
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EXPORT_SYMBOL(wcd_irq_init);
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/**
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* wcd_irq_exit: Uninitialize regmap IRQ and free IRQ resources
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* @irq_info: pointer to IRQ info structure
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*
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* Returns 0 on success or error on failure
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*/
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int wcd_irq_exit(struct wcd_irq_info *irq_info, struct irq_domain *virq)
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{
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if (!irq_info) {
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pr_err("%s: Null pointer handle\n", __func__);
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return -EINVAL;
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}
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regmap_del_irq_chip(irq_find_mapping(virq, 0), irq_info->irq_chip);
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return 0;
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}
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EXPORT_SYMBOL(wcd_irq_exit);
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63
include/asoc/wcd-irq.h
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63
include/asoc/wcd-irq.h
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@ -0,0 +1,63 @@
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/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __WCD_IRQ_H_
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#define __WCD_IRQ_H_
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/regmap.h>
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struct wcd_irq_info {
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struct regmap_irq_chip *wcd_regmap_irq_chip;
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char *codec_name;
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struct regmap *regmap;
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struct regmap_irq_chip_data *irq_chip;
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struct device *dev;
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};
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#if IS_ENABLED(CONFIG_WCD9XXX_CODEC_CORE)
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int wcd_irq_init(struct wcd_irq_info *irq_info, struct irq_domain **virq);
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int wcd_irq_exit(struct wcd_irq_info *irq_info, struct irq_domain *virq);
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int wcd_request_irq(struct wcd_irq_info *irq_info, int irq, const char *name,
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irq_handler_t handler, void *data);
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void wcd_free_irq(struct wcd_irq_info *irq_info, int irq, void *data);
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void wcd_enable_irq(struct wcd_irq_info *irq_info, int irq);
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void wcd_disable_irq(struct wcd_irq_info *irq_info, int irq);
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#else
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static inline int wcd_irq_init(struct wcd_irq_info *irq_info,
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struct irq_domain **virq)
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{
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return 0;
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};
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static inline int wcd_irq_exit(struct wcd_irq_info *irq_info,
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struct irq_domain *virq)
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{
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return 0;
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};
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static inline int wcd_request_irq(struct wcd_irq_info *irq,
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int irq, const char *name,
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irq_handler_t handler, void *data)
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{
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return 0;
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};
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static inline void wcd_free_irq(struct wcd_irq_info *irq, int irq, void *data);
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{
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};
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static inline void wcd_enable_irq(struct wcd_irq_info *irq, int irq);
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{
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};
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static inline void wcd_disable_irq(struct wcd_irq_info *irq, int irq);
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{
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};
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#endif
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#endif /* __WCD_IRQ_H_ */
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