diff options
Diffstat (limited to 'drivers/clk/x86/clk-lpss.c')
-rw-r--r-- | drivers/clk/x86/clk-lpss.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/drivers/clk/x86/clk-lpss.c b/drivers/clk/x86/clk-lpss.c deleted file mode 100644 index b5e229f3c3d9..000000000000 --- a/drivers/clk/x86/clk-lpss.c +++ /dev/null | |||
@@ -1,99 +0,0 @@ | |||
1 | /* | ||
2 | * Intel Low Power Subsystem clocks. | ||
3 | * | ||
4 | * Copyright (C) 2013, Intel Corporation | ||
5 | * Authors: Mika Westerberg <mika.westerberg@linux.intel.com> | ||
6 | * Heikki Krogerus <heikki.krogerus@linux.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 | |||
13 | #include <linux/acpi.h> | ||
14 | #include <linux/clk.h> | ||
15 | #include <linux/clk-provider.h> | ||
16 | #include <linux/err.h> | ||
17 | #include <linux/io.h> | ||
18 | #include <linux/module.h> | ||
19 | |||
20 | static int clk_lpss_is_mmio_resource(struct acpi_resource *res, void *data) | ||
21 | { | ||
22 | struct resource r; | ||
23 | return !acpi_dev_resource_memory(res, &r); | ||
24 | } | ||
25 | |||
26 | static acpi_status clk_lpss_find_mmio(acpi_handle handle, u32 level, | ||
27 | void *data, void **retval) | ||
28 | { | ||
29 | struct resource_list_entry *rentry; | ||
30 | struct list_head resource_list; | ||
31 | struct acpi_device *adev; | ||
32 | const char *uid = data; | ||
33 | int ret; | ||
34 | |||
35 | if (acpi_bus_get_device(handle, &adev)) | ||
36 | return AE_OK; | ||
37 | |||
38 | if (uid) { | ||
39 | if (!adev->pnp.unique_id) | ||
40 | return AE_OK; | ||
41 | if (strcmp(uid, adev->pnp.unique_id)) | ||
42 | return AE_OK; | ||
43 | } | ||
44 | |||
45 | INIT_LIST_HEAD(&resource_list); | ||
46 | ret = acpi_dev_get_resources(adev, &resource_list, | ||
47 | clk_lpss_is_mmio_resource, NULL); | ||
48 | if (ret < 0) | ||
49 | return AE_NO_MEMORY; | ||
50 | |||
51 | list_for_each_entry(rentry, &resource_list, node) | ||
52 | if (resource_type(&rentry->res) == IORESOURCE_MEM) { | ||
53 | *(struct resource *)retval = rentry->res; | ||
54 | break; | ||
55 | } | ||
56 | |||
57 | acpi_dev_free_resource_list(&resource_list); | ||
58 | return AE_OK; | ||
59 | } | ||
60 | |||
61 | /** | ||
62 | * clk_register_lpss_gate - register LPSS clock gate | ||
63 | * @name: name of this clock gate | ||
64 | * @parent_name: parent clock name | ||
65 | * @hid: ACPI _HID of the device | ||
66 | * @uid: ACPI _UID of the device (optional) | ||
67 | * @offset: LPSS PRV_CLOCK_PARAMS offset | ||
68 | * | ||
69 | * Creates and registers LPSS clock gate. | ||
70 | */ | ||
71 | struct clk *clk_register_lpss_gate(const char *name, const char *parent_name, | ||
72 | const char *hid, const char *uid, | ||
73 | unsigned offset) | ||
74 | { | ||
75 | struct resource res = { }; | ||
76 | void __iomem *mmio_base; | ||
77 | acpi_status status; | ||
78 | struct clk *clk; | ||
79 | |||
80 | /* | ||
81 | * First try to look the device and its mmio resource from the | ||
82 | * ACPI namespace. | ||
83 | */ | ||
84 | status = acpi_get_devices(hid, clk_lpss_find_mmio, (void *)uid, | ||
85 | (void **)&res); | ||
86 | if (ACPI_FAILURE(status) || !res.start) | ||
87 | return ERR_PTR(-ENODEV); | ||
88 | |||
89 | mmio_base = ioremap(res.start, resource_size(&res)); | ||
90 | if (!mmio_base) | ||
91 | return ERR_PTR(-ENOMEM); | ||
92 | |||
93 | clk = clk_register_gate(NULL, name, parent_name, 0, mmio_base + offset, | ||
94 | 0, 0, NULL); | ||
95 | if (IS_ERR(clk)) | ||
96 | iounmap(mmio_base); | ||
97 | |||
98 | return clk; | ||
99 | } | ||