pinctrl/exynos/pinctrl-exynos.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Exynos pinctrl driver common code.
12 #include "pinctrl-exynos.h"
17  * exynos_pinctrl_setup_peri: setup pinctrl for a peripheral.
18  * conf: soc specific pin configuration data array
19  * num_conf: number of configurations in the conf array.
20  * base: base address of the pin controller.
35 /* given a pin-name, return the address of pin config registers */
37 						u32 *pin)  in pin_to_bank_base()  argument
40 	const struct samsung_pin_ctrl *pin_ctrl = priv->pin_ctrl;  in pin_to_bank_base()
41 	const struct samsung_pin_bank_data *bank_data = pin_ctrl->pin_banks;  in pin_to_bank_base()
42 	u32 nr_banks = pin_ctrl->nr_banks, idx = 0;  in pin_to_bank_base()
46 	 * The format of the pin name is <bank name>-<pin_number>.  in pin_to_bank_base()
47 	 * Example: gpa0-4 (gpa0 is the bank name and 4 is the pin number.  in pin_to_bank_base()
49 	while (pin_name[idx] != '-') {  in pin_to_bank_base()
54 	*pin = pin_name[++idx] - '0';  in pin_to_bank_base()
56 	/* lookup the pin bank data using the pin bank name */  in pin_to_bank_base()
61 	return priv->base + bank_data[idx].offset;  in pin_to_bank_base()
65  * exynos_pinctrl_set_state: configure a pin state.
66  * dev: the pinctrl device to be configured.
71 	const void *fdt = gd->fdt_blob;  in exynos_pinctrl_set_state()
79 	 * refer to the following document for the pinctrl bindings  in exynos_pinctrl_set_state()
80 	 * linux/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt  in exynos_pinctrl_set_state()
84 		return -EINVAL;  in exynos_pinctrl_set_state()
86 	pinfunc = fdtdec_get_int(fdt, node, "samsung,pin-function", -1);  in exynos_pinctrl_set_state()
87 	pinpud = fdtdec_get_int(fdt, node, "samsung,pin-pud", -1);  in exynos_pinctrl_set_state()
88 	pindrv = fdtdec_get_int(fdt, node, "samsung,pin-drv", -1);  in exynos_pinctrl_set_state()
96 		if (pinfunc != -1) {  in exynos_pinctrl_set_state()
103 		if (pinpud != -1) {  in exynos_pinctrl_set_state()
110 		if (pindrv != -1) {  in exynos_pinctrl_set_state()
128 		return -EINVAL;  in exynos_pinctrl_probe()
132 		return -EINVAL;  in exynos_pinctrl_probe()
134 	priv->base = base;  in exynos_pinctrl_probe()
135 	priv->pin_ctrl = (struct samsung_pin_ctrl *)dev_get_driver_data(dev) +  in exynos_pinctrl_probe()
136 				dev->req_seq;  in exynos_pinctrl_probe()