MTK mtk kernel 设置EINT中断响应

本文环境

mt6797
kernel 3.18
android 6.0

DTS设置

&eintc {irq_my_irq@3 {compatible = "eint, my-irq";interrupt-parent = <&eintc>;interrupts = <65 IRQ_TYPE_EDGE_RISING>;debounce = <65 0>;};irq_my_gpio@3 {compatible = "eint, my-gpio";interrupt-parent = <&eintc>;interrupts = <179 IRQ_TYPE_EDGE_RISING>;debounce = <179 0>;};
};{//...pinctrl-names = "default", "my_irq_as_int", "nor_irq_as_gpio";pinctrl-0 = <&pins_default>;pinctrl-1 = <&pins_my_irq_as_int>;pinctrl-2 = <&pins_normal_irq_as_gpio>;
};&pio {pins_default: eint0default {};pins_my_irq_as_int: eint@0 {pins_cmd_dat {pins = <PINMUX_GPIO65__FUNC_EINT4>;slew-rate = <0>;bias-disable;};};pins_normal_irq_as_gpio: normal_irq_as_gpio@0 {pins_cmd_dat {pins = <PINMUX_GPIO179__FUNC_GPIO179>;slew-rate = <0>;bias-disable;};};
};

driver配置


struct pinctrl *my_pinctrl;
struct pinctrl_state *pins_default;
struct pinctrl_state *my_irq_as_int, *nor_irq_as_gpio;int parse_dt(struct platform_device *pdev)
{//...my_pinctrl = devm_pinctrl_get(&pdev->dev);if (IS_ERR(my_pinctrl)) {ret = PTR_ERR(my_pinctrl);dev_err(&pdev->dev, "failed to find pinctrl!\n");return ret;}pins_default = pinctrl_lookup_state(my_pinctrl, "default");if (IS_ERR(pins_default)) {ret = PTR_ERR(pins_default);dev_err(&pdev->dev, "cannot find default: %d!\n", ret);}my_irq_as_int= pinctrl_lookup_state(my_pinctrl, "my_irq_as_int");if (IS_ERR(my_irq_as_int)) {ret = PTR_ERR(my_irq_as_int);dev_err(&pdev->dev, "cannot find my_irq_as_int\n");return ret;}nor_irq_as_gpio = pinctrl_lookup_state(my_pinctrl, "nor_irq_as_gpio");
}

// 设置INT
int my_probe(*dev)
{// ...pinctrl_select_state(my_pinctrl, eint_as_int);pinctrl_select_state(my_pinctrl, nor_irq_as_gpio);// ...
}static struct of_device_id my_irq_match[] = {{.compatible = "eint,my-irq", },
};
static struct of_device_id my_gpio_match[] = {{.compatible = "eint,my-gpio", },
};
// 中断响应函数
static irqreturn_t my_irq_handler(int irq, void *dev_id)
{//...return IRQ_HANDLED;
}
// 关联注册中断响应函数
int my_register_irq(void)
{struct device_node *node = NULL;int ret = 0;int irq;node = of_find_matching_node(node, my_irq_match);if (NULL == node) {pr_err("Can not find eint node!");return -ENODATA;}irq = irq_of_parse_and_map(node, 0); pr_debug("%s irq: %d", my_irq_match->compatible, irq);ret = request_irq(irq, my_irq_handler,IRQF_TRIGGER_FALLING, "my-irq", NULL);return ret;
}
#define GPIO_MY_IRQ_GPIO (GPIO179)
int my_register_irq_gpio(void)
{struct device_node *node = NULL;int ret = 0;int irq;int gpio = GPIO_MY_IRQ_GPIO;/* request irq gpio */if (gpio_is_valid(gpio)) {ret = gpio_request(gpio, "irq_gpio");if (ret) {pr_err("irq gpio request failed");}ret = gpio_direction_input(gpio);if (ret) {pr_err("set_direction for irq gpio failed");}} else {pr_err("gpio: %d invalid", gpio);}node = of_find_matching_node(node, my_gpio_match);if (NULL == node) {pr_err("Can not find eint node!");return -ENODATA;}irq = irq_of_parse_and_map(node, 0); pr_debug("%s irq: %d", my_gpio_match->compatible, irq);ret = request_irq(irq, my_irq_handler,IRQF_TRIGGER_FALLING, "my-gpio-irq", NULL);return ret;
}

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MTK mtk kernel 设置EINT中断响应

本文环境

DTS设置

driver配置

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