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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/mfd/cs5535-mfd.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
34  *
....@@ -7,19 +8,6 @@
78  * hardcoded in the CS553x specifications.
89  *
910  * Copyright (c) 2010  Andres Salomon <dilinger@queued.net>
10
- *
11
- * This program is free software; you can redistribute it and/or modify
12
- * it under the terms of the GNU General Public License version 2 as
13
- * published by the Free Software Foundation.
14
- *
15
- * This program is distributed in the hope that it will be useful,
16
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
17
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18
- * GNU General Public License for more details.
19
- *
20
- * You should have received a copy of the GNU General Public License
21
- * along with this program; if not, write to the Free Software
22
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
2311  */
2412 
2513 #include <linux/kernel.h>
....@@ -39,131 +27,106 @@
3927 	NR_BARS,
4028 };
4129 
42
-static int cs5535_mfd_res_enable(struct platform_device *pdev)
43
-{
44
-	struct resource *res;
45
-
46
-	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
47
-	if (!res) {
48
-		dev_err(&pdev->dev, "can't fetch device resource info\n");
49
-		return -EIO;
50
-	}
51
-
52
-	if (!request_region(res->start, resource_size(res), DRV_NAME)) {
53
-		dev_err(&pdev->dev, "can't request region\n");
54
-		return -EIO;
55
-	}
56
-
57
-	return 0;
58
-}
59
-
60
-static int cs5535_mfd_res_disable(struct platform_device *pdev)
61
-{
62
-	struct resource *res;
63
-
64
-	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
65
-	if (!res) {
66
-		dev_err(&pdev->dev, "can't fetch device resource info\n");
67
-		return -EIO;
68
-	}
69
-
70
-	release_region(res->start, resource_size(res));
71
-	return 0;
72
-}
73
-
7430 static struct resource cs5535_mfd_resources[NR_BARS];
7531 
7632 static struct mfd_cell cs5535_mfd_cells[] = {
7733 	{
78
-		.id = SMB_BAR,
7934 		.name = "cs5535-smb",
8035 		.num_resources = 1,
8136 		.resources = &cs5535_mfd_resources[SMB_BAR],
8237 	},
8338 	{
84
-		.id = GPIO_BAR,
8539 		.name = "cs5535-gpio",
8640 		.num_resources = 1,
8741 		.resources = &cs5535_mfd_resources[GPIO_BAR],
8842 	},
8943 	{
90
-		.id = MFGPT_BAR,
9144 		.name = "cs5535-mfgpt",
9245 		.num_resources = 1,
9346 		.resources = &cs5535_mfd_resources[MFGPT_BAR],
9447 	},
9548 	{
96
-		.id = PMS_BAR,
9749 		.name = "cs5535-pms",
9850 		.num_resources = 1,
9951 		.resources = &cs5535_mfd_resources[PMS_BAR],
100
-
101
-		.enable = cs5535_mfd_res_enable,
102
-		.disable = cs5535_mfd_res_disable,
103
-	},
104
-	{
105
-		.id = ACPI_BAR,
106
-		.name = "cs5535-acpi",
107
-		.num_resources = 1,
108
-		.resources = &cs5535_mfd_resources[ACPI_BAR],
109
-
110
-		.enable = cs5535_mfd_res_enable,
111
-		.disable = cs5535_mfd_res_disable,
11252 	},
11353 };
11454 
115
-#ifdef CONFIG_OLPC
116
-static void cs5535_clone_olpc_cells(void)
117
-{
118
-	static const char *acpi_clones[] = {
119
-		"olpc-xo1-pm-acpi",
120
-		"olpc-xo1-sci-acpi"
121
-	};
122
-
123
-	if (!machine_is_olpc())
124
-		return;
125
-
126
-	mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones));
127
-}
128
-#else
129
-static void cs5535_clone_olpc_cells(void) { }
130
-#endif
55
+static struct mfd_cell cs5535_olpc_mfd_cells[] = {
56
+	{
57
+		.name = "olpc-xo1-pm-acpi",
58
+		.num_resources = 1,
59
+		.resources = &cs5535_mfd_resources[ACPI_BAR],
60
+	},
61
+	{
62
+		.name = "olpc-xo1-sci-acpi",
63
+		.num_resources = 1,
64
+		.resources = &cs5535_mfd_resources[ACPI_BAR],
65
+	},
66
+};
13167 
13268 static int cs5535_mfd_probe(struct pci_dev *pdev,
13369 		const struct pci_device_id *id)
13470 {
135
-	int err, i;
71
+	int err, bar;
13672 
13773 	err = pci_enable_device(pdev);
13874 	if (err)
13975 		return err;
14076 
141
-	/* fill in IO range for each cell; subdrivers handle the region */
142
-	for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
143
-		int bar = cs5535_mfd_cells[i].id;
77
+	for (bar = 0; bar < NR_BARS; bar++) {
14478 		struct resource *r = &cs5535_mfd_resources[bar];
14579 
14680 		r->flags = IORESOURCE_IO;
14781 		r->start = pci_resource_start(pdev, bar);
14882 		r->end = pci_resource_end(pdev, bar);
149
-
150
-		/* id is used for temporarily storing BAR; unset it now */
151
-		cs5535_mfd_cells[i].id = 0;
15283 	}
15384 
154
-	err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
155
-			      ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
85
+	err = pci_request_region(pdev, PMS_BAR, DRV_NAME);
15686 	if (err) {
157
-		dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
87
+		dev_err(&pdev->dev, "Failed to request PMS_BAR's IO region\n");
15888 		goto err_disable;
15989 	}
160
-	cs5535_clone_olpc_cells();
90
+
91
+	err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, cs5535_mfd_cells,
92
+			      ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
93
+	if (err) {
94
+		dev_err(&pdev->dev,
95
+			"Failed to add CS5535 sub-devices: %d\n", err);
96
+		goto err_release_pms;
97
+	}
98
+
99
+	if (machine_is_olpc()) {
100
+		err = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
101
+		if (err) {
102
+			dev_err(&pdev->dev,
103
+				"Failed to request ACPI_BAR's IO region\n");
104
+			goto err_remove_devices;
105
+		}
106
+
107
+		err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
108
+				      cs5535_olpc_mfd_cells,
109
+				      ARRAY_SIZE(cs5535_olpc_mfd_cells),
110
+				      NULL, 0, NULL);
111
+		if (err) {
112
+			dev_err(&pdev->dev,
113
+				"Failed to add CS5535 OLPC sub-devices: %d\n",
114
+				err);
115
+			goto err_release_acpi;
116
+		}
117
+	}
161118 
162119 	dev_info(&pdev->dev, "%zu devices registered.\n",
163120 			ARRAY_SIZE(cs5535_mfd_cells));
164121 
165122 	return 0;
166123 
124
+err_release_acpi:
125
+	pci_release_region(pdev, ACPI_BAR);
126
+err_remove_devices:
127
+	mfd_remove_devices(&pdev->dev);
128
+err_release_pms:
129
+	pci_release_region(pdev, PMS_BAR);
167130 err_disable:
168131 	pci_disable_device(pdev);
169132 	return err;
....@@ -172,6 +135,11 @@
172135 static void cs5535_mfd_remove(struct pci_dev *pdev)
173136 {
174137 	mfd_remove_devices(&pdev->dev);
138
+
139
+	if (machine_is_olpc())
140
+		pci_release_region(pdev, ACPI_BAR);
141
+
142
+	pci_release_region(pdev, PMS_BAR);
175143 	pci_disable_device(pdev);
176144 }
177145