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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/extcon/extcon-axp288.c
....@@ -1,18 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver
34  *
45  * Copyright (c) 2017-2018 Hans de Goede <hdegoede@redhat.com>
56  * Copyright (C) 2015 Intel Corporation
67  * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
7
- *
8
- * This program is free software; you can redistribute it and/or modify
9
- * it under the terms of the GNU General Public License version 2 as
10
- * published by the Free Software Foundation.
11
- *
12
- * This program is distributed in the hope that it will be useful,
13
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
- * GNU General Public License for more details.
168  */
179 
1810 #include <linux/acpi.h>
....@@ -115,7 +107,7 @@
115107 };
116108 
117109 static const struct x86_cpu_id cherry_trail_cpu_ids[] = {
118
-	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT, X86_FEATURE_ANY },
110
+	X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT,	NULL),
119111 	{}
120112 };
121113 
....@@ -129,7 +121,6 @@
129121 	"Last shutdown caused by PMIC UVLO threshold",
130122 	"Last shutdown caused by SOC initiated cold off",
131123 	"Last shutdown caused by user pressing the power button",
132
-	NULL,
133124 };
134125 
135126 /*
....@@ -138,17 +129,20 @@
138129  */
139130 static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
140131 {
141
-	const char * const *rsi;
142132 	unsigned int val, i, clear_mask = 0;
133
+	unsigned long bits;
143134 	int ret;
144135 
145136 	ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
146
-	for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
147
-		if (val & BIT(i)) {
148
-			dev_dbg(info->dev, "%s\n", *rsi);
149
-			clear_mask |= BIT(i);
150
-		}
137
+	if (ret < 0) {
138
+		dev_err(info->dev, "failed to read reset source indicator\n");
139
+		return;
151140 	}
141
+
142
+	bits = val & GENMASK(ARRAY_SIZE(axp288_pwr_up_down_info) - 1, 0);
143
+	for_each_set_bit(i, &bits, ARRAY_SIZE(axp288_pwr_up_down_info))
144
+		dev_dbg(info->dev, "%s\n", axp288_pwr_up_down_info[i]);
145
+	clear_mask = bits;
152146 
153147 	/* Clear the register value for next reboot (write 1 to clear bit) */
154148 	regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
....@@ -328,12 +322,31 @@
328322 	usb_role_switch_put(info->role_sw);
329323 }
330324 
325
+static int axp288_extcon_find_role_sw(struct axp288_extcon_info *info)
326
+{
327
+	const struct software_node *swnode;
328
+	struct fwnode_handle *fwnode;
329
+
330
+	if (!x86_match_cpu(cherry_trail_cpu_ids))
331
+		return 0;
332
+
333
+	swnode = software_node_find_by_name(NULL, "intel-xhci-usb-sw");
334
+	if (!swnode)
335
+		return -EPROBE_DEFER;
336
+
337
+	fwnode = software_node_fwnode(swnode);
338
+	info->role_sw = usb_role_switch_find_by_fwnode(fwnode);
339
+	fwnode_handle_put(fwnode);
340
+
341
+	return info->role_sw ? 0 : -EPROBE_DEFER;
342
+}
343
+
331344 static int axp288_extcon_probe(struct platform_device *pdev)
332345 {
333346 	struct axp288_extcon_info *info;
334347 	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
335348 	struct device *dev = &pdev->dev;
336
-	const char *name;
349
+	struct acpi_device *adev;
337350 	int ret, i, pirq;
338351 
339352 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
....@@ -349,17 +362,19 @@
349362 
350363 	platform_set_drvdata(pdev, info);
351364 
352
-	info->role_sw = usb_role_switch_get(dev);
353
-	if (IS_ERR(info->role_sw))
354
-		return PTR_ERR(info->role_sw);
365
+	ret = axp288_extcon_find_role_sw(info);
366
+	if (ret)
367
+		return ret;
368
+
355369 	if (info->role_sw) {
356370 		ret = devm_add_action_or_reset(dev, axp288_put_role_sw, info);
357371 		if (ret)
358372 			return ret;
359373 
360
-		name = acpi_dev_get_first_match_name("INT3496", NULL, -1);
361
-		if (name) {
362
-			info->id_extcon = extcon_get_extcon_dev(name);
374
+		adev = acpi_dev_get_first_match_dev("INT3496", NULL, -1);
375
+		if (adev) {
376
+			info->id_extcon = extcon_get_extcon_dev(acpi_dev_name(adev));
377
+			put_device(&adev->dev);
363378 			if (!info->id_extcon)
364379 				return -EPROBE_DEFER;
365380 
....@@ -476,30 +491,7 @@
476491 		.pm = &axp288_extcon_pm_ops,
477492 	},
478493 };
479
-
480
-static struct device_connection axp288_extcon_role_sw_conn = {
481
-	.endpoint[0] = "axp288_extcon",
482
-	.endpoint[1] = "intel_xhci_usb_sw-role-switch",
483
-	.id = "usb-role-switch",
484
-};
485
-
486
-static int __init axp288_extcon_init(void)
487
-{
488
-	if (x86_match_cpu(cherry_trail_cpu_ids))
489
-		device_connection_add(&axp288_extcon_role_sw_conn);
490
-
491
-	return platform_driver_register(&axp288_extcon_driver);
492
-}
493
-module_init(axp288_extcon_init);
494
-
495
-static void __exit axp288_extcon_exit(void)
496
-{
497
-	if (x86_match_cpu(cherry_trail_cpu_ids))
498
-		device_connection_remove(&axp288_extcon_role_sw_conn);
499
-
500
-	platform_driver_unregister(&axp288_extcon_driver);
501
-}
502
-module_exit(axp288_extcon_exit);
494
+module_platform_driver(axp288_extcon_driver);
503495 
504496 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
505497 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");