// SPDX-License-Identifier: GPL-2.0 #include <linux/auxiliary_bus.h>#include <linux/gpio/consumer.h>#include <linux/module.h>#include <linux/property.h>#include <linux/reset-controller.h> struct reset_gpio_priv {	struct reset_controller_dev rc;	struct gpio_desc *reset;}; static inline struct reset_gpio_priv*rc_to_reset_gpio(struct reset_controller_dev *rc){	return container_of(rc, struct reset_gpio_priv, rc);} static int reset_gpio_assert(struct reset_controller_dev *rc, unsigned long id){	struct reset_gpio_priv *priv = rc_to_reset_gpio(rc); 	return gpiod_set_value_cansleep(priv->reset, 1);} static int reset_gpio_deassert(struct reset_controller_dev *rc,			       unsigned long id){	struct reset_gpio_priv *priv = rc_to_reset_gpio(rc); 	return gpiod_set_value_cansleep(priv->reset, 0);} static int reset_gpio_status(struct reset_controller_dev *rc, unsigned long id){	struct reset_gpio_priv *priv = rc_to_reset_gpio(rc); 	return gpiod_get_value_cansleep(priv->reset);} static const struct reset_control_ops reset_gpio_ops = {	.assert = reset_gpio_assert,	.deassert = reset_gpio_deassert,	.status = reset_gpio_status,}; static int reset_gpio_fwnode_xlate(struct reset_controller_dev *rcdev,				   const struct fwnode_reference_args *reset_spec){	return reset_spec->args[0];} static int reset_gpio_probe(struct auxiliary_device *adev,			    const struct auxiliary_device_id *id){	struct device *dev = &adev->dev;	struct reset_gpio_priv *priv; 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);	if (!priv)		return -ENOMEM; 	priv->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);	if (IS_ERR(priv->reset))		return dev_err_probe(dev, PTR_ERR(priv->reset),				     "Could not get reset gpios\n"); 	priv->rc.ops = &reset_gpio_ops;	priv->rc.owner = THIS_MODULE;	priv->rc.dev = dev; 	/* Cells to match GPIO specifier, but it's not really used */	priv->rc.fwnode_reset_n_cells = 2;	priv->rc.fwnode_xlate = reset_gpio_fwnode_xlate;	priv->rc.nr_resets = 1; 	return devm_reset_controller_register(dev, &priv->rc);} static const struct auxiliary_device_id reset_gpio_ids[] = {	{ .name = "reset.gpio" },	{}};MODULE_DEVICE_TABLE(auxiliary, reset_gpio_ids); static struct auxiliary_driver reset_gpio_driver = {	.probe		= reset_gpio_probe,	.id_table	= reset_gpio_ids,	.driver	= {		.name = "reset-gpio",		.suppress_bind_attrs = true,	},};module_auxiliary_driver(reset_gpio_driver); MODULE_AUTHOR("Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>");MODULE_DESCRIPTION("Generic GPIO reset driver");MODULE_LICENSE("GPL");