1 // SPDX-License-Identifier: GPL-2.0-only
3  * Core driver for the generic pin config portions of the pin control subsystem
5  * Copyright (C) 2011 ST-Ericsson SA
6  * Written on behalf of Linaro for ST-Ericsson
22 #include <linux/pinctrl/pinconf-generic.h>
28 #include "pinctrl-utils.h"
32 	PCONFDUMP(PIN_CONFIG_BIAS_BUS_HOLD, "input bias bus hold", NULL, false),
33 	PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL, false),
34 	PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL, false),
35 	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", "ohms", true),
37 				"input bias pull to pin specific state", "ohms", true),
38 	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", "ohms", true),
41 	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL, false),
49 	PCONFDUMP(PIN_CONFIG_MODE_LOW_POWER, "pin low power", "mode", true),
51 	PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level", true),
53 	PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector", true),
61 				     unsigned int pin,  in pinconf_generic_dump_one()  argument
74 			ret = pin_config_group_get(dev_name(pctldev->dev),  in pinconf_generic_dump_one()
77 			ret = pin_config_get_for_pin(pctldev, pin, &config);  in pinconf_generic_dump_one()
79 		if (ret == -EINVAL || ret == -ENOTSUPP)  in pinconf_generic_dump_one()
103  * pinconf_generic_dump_pins - Print information about pin or group of pins
107  * @pin:	Pin number specyfying pin
109  * Print the pinconf configuration for the requested pin(s) to @s. Pins can be
110  * specified either by pin using @pin or by group using @gname. Only one needs
114 			       const char *gname, unsigned int pin)  in pinconf_generic_dump_pins()  argument
116 	const struct pinconf_ops *ops = pctldev->desc->confops;  in pinconf_generic_dump_pins()
119 	if (!ops->is_generic)  in pinconf_generic_dump_pins()
123 	pinconf_generic_dump_one(pctldev, s, gname, pin, conf_items,  in pinconf_generic_dump_pins()
125 	/* driver-specific parameters */  in pinconf_generic_dump_pins()
126 	if (pctldev->desc->num_custom_params &&  in pinconf_generic_dump_pins()
127 	    pctldev->desc->custom_conf_items)  in pinconf_generic_dump_pins()
128 		pinconf_generic_dump_one(pctldev, s, gname, pin,  in pinconf_generic_dump_pins()
129 					 pctldev->desc->custom_conf_items,  in pinconf_generic_dump_pins()
130 					 pctldev->desc->num_custom_params,  in pinconf_generic_dump_pins()
146 	if (!pctldev->desc->num_custom_params ||  in pinconf_generic_dump_config()
147 	    !pctldev->desc->custom_conf_items)  in pinconf_generic_dump_config()
150 	for (i = 0; i < pctldev->desc->num_custom_params; i++) {  in pinconf_generic_dump_config()
152 		    pctldev->desc->custom_conf_items[i].param)  in pinconf_generic_dump_config()
155 				pctldev->desc->custom_conf_items[i].display,  in pinconf_generic_dump_config()
164 	{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
165 	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
166 	{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
167 	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
168 	{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
169 	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
170 	{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
171 	{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
172 	{ "drive-push-pull", PIN_CONFIG_DRIVE_PUSH_PULL, 0 },
173 	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
174 	{ "drive-strength-microamp", PIN_CONFIG_DRIVE_STRENGTH_UA, 0 },
175 	{ "input-debounce", PIN_CONFIG_INPUT_DEBOUNCE, 0 },
176 	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
177 	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
178 	{ "input-schmitt", PIN_CONFIG_INPUT_SCHMITT, 0 },
179 	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
180 	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
181 	{ "input-schmitt-microvolts", PIN_CONFIG_INPUT_SCHMITT_UV, 0 },
182 	{ "low-power-disable", PIN_CONFIG_MODE_LOW_POWER, 0 },
183 	{ "low-power-enable", PIN_CONFIG_MODE_LOW_POWER, 1 },
184 	{ "output-disable", PIN_CONFIG_OUTPUT_ENABLE, 0 },
185 	{ "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 },
186 	{ "output-high", PIN_CONFIG_OUTPUT, 1, },
187 	{ "output-impedance-ohms", PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, 0 },
188 	{ "output-low", PIN_CONFIG_OUTPUT, 0, },
189 	{ "power-source", PIN_CONFIG_POWER_SOURCE, 0 },
190 	{ "sleep-hardware-state", PIN_CONFIG_SLEEP_HARDWARE_STATE, 0 },
191 	{ "slew-rate", PIN_CONFIG_SLEW_RATE, 0 },
192 	{ "skew-delay", PIN_CONFIG_SKEW_DELAY, 0 },
196  * parse_dt_cfg() - Parse DT pinconf parameters
220 		ret = of_property_read_u32(np, par->property, &val);  in parse_dt_cfg()
223 		if (ret == -EINVAL)  in parse_dt_cfg()
226 		/* use default value, when no value is specified */  in parse_dt_cfg()
228 			val = par->default_value;  in parse_dt_cfg()
230 		pr_debug("found %s with value %u\n", par->property, val);  in parse_dt_cfg()
231 		cfg[*ncfg] = pinconf_to_config_packed(par->param, val);  in parse_dt_cfg()
255 		return -EINVAL;  in pinconf_generic_parse_dt_config()
260 		max_cfg += pctldev->desc->num_custom_params;  in pinconf_generic_parse_dt_config()
263 		return -ENOMEM;  in pinconf_generic_parse_dt_config()
266 	if (pctldev && pctldev->desc->num_custom_params &&  in pinconf_generic_parse_dt_config()
267 		pctldev->desc->custom_params)  in pinconf_generic_parse_dt_config()
268 		parse_dt_cfg(np, pctldev->desc->custom_params,  in pinconf_generic_parse_dt_config()
269 			     pctldev->desc->num_custom_params, cfg, &ncfg);  in pinconf_generic_parse_dt_config()
286 		ret = -ENOMEM;  in pinconf_generic_parse_dt_config()
305 	struct device *dev = pctldev->dev;  in pinconf_generic_dt_subnode_to_map()
331 		if (ret != -EINVAL)  in pinconf_generic_dt_subnode_to_map()