96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2021 MediaTek Inc.
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*/
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#include <linux/interrupt.h>
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#include <linux/mfd/mt6358/core.h>
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#include <linux/mfd/mt6359p/registers.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/reboot.h>
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#include <linux/regmap.h>
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#include <linux/suspend.h>
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static struct regmap *g_regmap;
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struct mutex pm_mutex;
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static irqreturn_t ot_int_handler(int irq, void *data)
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{
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int ret, irq_index = (uintptr_t)data;
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pr_info("%s with irq index=%d\n", __func__, irq_index);
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ret = regmap_update_bits(g_regmap,
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PMIC_RG_RSV_SWREG_ADDR,
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1 << irq_index,
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1 << irq_index);
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if (ret)
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pr_info("%s error\n", __func__);
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/*
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* TODO: After kernel-4.19, pm_mutex change to
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* system_transition_mutex.
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*/
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if (mutex_trylock(&pm_mutex)) {
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kernel_power_off();
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mutex_unlock(&pm_mutex);
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}
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return IRQ_HANDLED;
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}
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static int mt635x_ot_debug_probe(struct platform_device *pdev)
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{
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struct mt6358_chip *pmic = dev_get_drvdata(pdev->dev.parent);
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int i = 0, virq = 0, num_irqs = 0, ret = 0;
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g_regmap = pmic->regmap;
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if (!g_regmap)
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return -ENODEV;
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num_irqs = platform_irq_count(pdev);
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if (num_irqs <= 0)
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return num_irqs;
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for (i = 0; i < num_irqs; i++) {
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virq = platform_get_irq(pdev, i);
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if (virq <= 0) {
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dev_notice(&pdev->dev, "get virq fail\n");
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continue;
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}
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ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
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ot_int_handler,
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IRQF_TRIGGER_NONE,
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"PMIC_OT",
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(void *)(uintptr_t)i);
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if (ret < 0)
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dev_notice(&pdev->dev, "request irq fail\n");
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}
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dev_info(&pdev->dev, "%s\n", __func__);
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return ret;
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}
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static const struct of_device_id mt635x_ot_debug_of_match[] = {
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{
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.compatible = "mediatek,mt635x-ot-debug",
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(of, mt635x_ot_debug_of_match);
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static struct platform_driver mt635x_ot_debug_driver = {
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.driver = {
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.name = "mt635x-ot-debug",
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.of_match_table = mt635x_ot_debug_of_match,
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},
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.probe = mt635x_ot_debug_probe,
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};
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module_platform_driver(mt635x_ot_debug_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Wen Su <wen.su@mediatek.com>");
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MODULE_DESCRIPTION("PMIC Over Thermal Debug driver for MediaTek MT635x PMIC");
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