add new system file

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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/pinctrl/pinconf-generic.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Core driver for the generic pin config portions of the pin control subsystem
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  *
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@@ -5,8 +6,6 @@
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  * Written on behalf of Linaro for ST-Ericsson
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  *
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  * Author: Linus Walleij <linus.walleij@linaro.org>
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- *
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- * License terms: GNU General Public License (GPL) version 2
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  */
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 #define pr_fmt(fmt) "generic pinconfig core: " fmt
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@@ -31,14 +30,15 @@
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 	PCONFDUMP(PIN_CONFIG_BIAS_BUS_HOLD, "input bias bus hold", NULL, false),
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 	PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL, false),
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 	PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL, false),
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-	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", NULL, false),
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+	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", "ohms", true),
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 	PCONFDUMP(PIN_CONFIG_BIAS_PULL_PIN_DEFAULT,
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-				"input bias pull to pin specific state", NULL, false),
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-	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", NULL, false),
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+				"input bias pull to pin specific state", "ohms", true),
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+	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", "ohms", true),
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 	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL, false),
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 	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL, false),
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 	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL, false),
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 	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH, "output drive strength", "mA", true),
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+	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH_UA, "output drive strength", "uA", true),
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 	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "usec", true),
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 	PCONFDUMP(PIN_CONFIG_INPUT_ENABLE, "input enabled", NULL, false),
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 	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL, false),
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@@ -167,6 +167,7 @@
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 	{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
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 	{ "drive-push-pull", PIN_CONFIG_DRIVE_PUSH_PULL, 0 },
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 	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
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+	{ "drive-strength-microamp", PIN_CONFIG_DRIVE_STRENGTH_UA, 0 },
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 	{ "input-debounce", PIN_CONFIG_INPUT_DEBOUNCE, 0 },
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 	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
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 	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
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@@ -230,9 +231,10 @@
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  * pinconf_generic_parse_dt_config()
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  * parse the config properties into generic pinconfig values.
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  * @np: node containing the pinconfig properties
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+ * @pctldev: pincontrol device
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  * @configs: array with nconfigs entries containing the generic pinconf values
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  *           must be freed when no longer necessary.
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- * @nconfigs: umber of configurations
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+ * @nconfigs: number of configurations
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  */
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 int pinconf_generic_parse_dt_config(struct device_node *np,
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 				    struct pinctrl_dev *pctldev,
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@@ -391,8 +393,10 @@
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 	for_each_available_child_of_node(np_config, np) {
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 		ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
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 					&reserved_maps, num_maps, type);
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-		if (ret < 0)
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+		if (ret < 0) {
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+			of_node_put(np);
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 			goto exit;
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+		}
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 	}
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 	return 0;
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