1 // SPDX-License-Identifier: GPL-2.0-only
6  * to control the PIN resources on SCU domain.
14 #include <dt-bindings/firmware/imx/rsrc.h>
17 	struct gpio_chip	chip;  member
34 static int imx_scu_gpio_get(struct gpio_chip *chip, unsigned int offset)  in imx_scu_gpio_get()  argument
36 	struct scu_gpio_priv *priv = gpiochip_get_data(chip);  in imx_scu_gpio_get()
40 	if (offset >= chip->ngpio)  in imx_scu_gpio_get()
41 		return -EINVAL;  in imx_scu_gpio_get()
43 	mutex_lock(&priv->lock);  in imx_scu_gpio_get()
45 	/* to read PIN state via scu api */  in imx_scu_gpio_get()
46 	err = imx_sc_misc_get_control(priv->handle,  in imx_scu_gpio_get()
48 	mutex_unlock(&priv->lock);  in imx_scu_gpio_get()
51 		dev_err(priv->dev, "SCU get failed: %d\n", err);  in imx_scu_gpio_get()
58 static void imx_scu_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)  in imx_scu_gpio_set()  argument
60 	struct scu_gpio_priv *priv = gpiochip_get_data(chip);  in imx_scu_gpio_set()
63 	if (offset >= chip->ngpio)  in imx_scu_gpio_set()
66 	mutex_lock(&priv->lock);  in imx_scu_gpio_set()
68 	/* to set PIN output level via scu api */  in imx_scu_gpio_set()
69 	err = imx_sc_misc_set_control(priv->handle,  in imx_scu_gpio_set()
71 	mutex_unlock(&priv->lock);  in imx_scu_gpio_set()
74 		dev_err(priv->dev, "SCU set (%d) failed: %d\n",  in imx_scu_gpio_set()
78 static int imx_scu_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)  in imx_scu_gpio_get_direction()  argument
80 	if (offset >= chip->ngpio)  in imx_scu_gpio_get_direction()
81 		return -EINVAL;  in imx_scu_gpio_get_direction()
88 	struct device *dev = &pdev->dev;  in imx_scu_gpio_probe()
93 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in imx_scu_gpio_probe()
95 		return -ENOMEM;  in imx_scu_gpio_probe()
97 	ret = imx_scu_get_handle(&priv->handle);  in imx_scu_gpio_probe()
101 	priv->dev = dev;  in imx_scu_gpio_probe()
102 	mutex_init(&priv->lock);  in imx_scu_gpio_probe()
104 	gc = &priv->chip;  in imx_scu_gpio_probe()
105 	gc->base = -1;  in imx_scu_gpio_probe()
106 	gc->parent = dev;  in imx_scu_gpio_probe()
107 	gc->ngpio = ARRAY_SIZE(scu_rsrc_arr);  in imx_scu_gpio_probe()
108 	gc->label = dev_name(dev);  in imx_scu_gpio_probe()
109 	gc->get = imx_scu_gpio_get;  in imx_scu_gpio_probe()
110 	gc->set = imx_scu_gpio_set;  in imx_scu_gpio_probe()
111 	gc->get_direction = imx_scu_gpio_get_direction;  in imx_scu_gpio_probe()
119 	{ .compatible = "fsl,imx8qxp-sc-gpio" },
125 		.name = "gpio-imx-scu",
139 MODULE_DESCRIPTION("NXP GPIO over IMX SCU API");