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-rw-r--r--drivers/thermal/int340x_thermal/Makefile1
-rw-r--r--drivers/thermal/int340x_thermal/processor_thermal_device.c298
2 files changed, 299 insertions, 0 deletions
diff --git a/drivers/thermal/int340x_thermal/Makefile b/drivers/thermal/int340x_thermal/Makefile
index ffe40bffaf1a..d4413698a85f 100644
--- a/drivers/thermal/int340x_thermal/Makefile
+++ b/drivers/thermal/int340x_thermal/Makefile
@@ -1,4 +1,5 @@
1obj-$(CONFIG_INT340X_THERMAL) += int3400_thermal.o 1obj-$(CONFIG_INT340X_THERMAL) += int3400_thermal.o
2obj-$(CONFIG_INT340X_THERMAL) += int3402_thermal.o 2obj-$(CONFIG_INT340X_THERMAL) += int3402_thermal.o
3obj-$(CONFIG_INT340X_THERMAL) += int3403_thermal.o 3obj-$(CONFIG_INT340X_THERMAL) += int3403_thermal.o
4obj-$(CONFIG_INT340X_THERMAL) += processor_thermal_device.o
4obj-$(CONFIG_ACPI_THERMAL_REL) += acpi_thermal_rel.o 5obj-$(CONFIG_ACPI_THERMAL_REL) += acpi_thermal_rel.o
diff --git a/drivers/thermal/int340x_thermal/processor_thermal_device.c b/drivers/thermal/int340x_thermal/processor_thermal_device.c
new file mode 100644
index 000000000000..f83c55b09e52
--- /dev/null
+++ b/drivers/thermal/int340x_thermal/processor_thermal_device.c
@@ -0,0 +1,298 @@
1/*
2 * processor_thermal_device.c
3 * Copyright (c) 2014, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 */
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/pci.h>
19#include <linux/platform_device.h>
20#include <linux/acpi.h>
21
22/* Broadwell-U/HSB thermal reporting device */
23#define PCI_DEVICE_ID_PROC_BDW_THERMAL 0x1603
24#define PCI_DEVICE_ID_PROC_HSB_THERMAL 0x0A03
25
26/* Braswell thermal reporting device */
27#define PCI_DEVICE_ID_PROC_BSW_THERMAL 0x22DC
28
29struct power_config {
30 u32 index;
31 u32 min_uw;
32 u32 max_uw;
33 u32 tmin_us;
34 u32 tmax_us;
35 u32 step_uw;
36};
37
38struct proc_thermal_device {
39 struct device *dev;
40 struct acpi_device *adev;
41 struct power_config power_limits[2];
42};
43
44enum proc_thermal_emum_mode_type {
45 PROC_THERMAL_NONE,
46 PROC_THERMAL_PCI,
47 PROC_THERMAL_PLATFORM_DEV
48};
49
50/*
51 * We can have only one type of enumeration, PCI or Platform,
52 * not both. So we don't need instance specific data.
53 */
54static enum proc_thermal_emum_mode_type proc_thermal_emum_mode =
55 PROC_THERMAL_NONE;
56
57#define POWER_LIMIT_SHOW(index, suffix) \
58static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \
59 struct device_attribute *attr, \
60 char *buf) \
61{ \
62 struct pci_dev *pci_dev; \
63 struct platform_device *pdev; \
64 struct proc_thermal_device *proc_dev; \
65\
66 if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \
67 pdev = to_platform_device(dev); \
68 proc_dev = platform_get_drvdata(pdev); \
69 } else { \
70 pci_dev = to_pci_dev(dev); \
71 proc_dev = pci_get_drvdata(pci_dev); \
72 } \
73 return sprintf(buf, "%lu\n",\
74 (unsigned long)proc_dev->power_limits[index].suffix * 1000); \
75}
76
77POWER_LIMIT_SHOW(0, min_uw)
78POWER_LIMIT_SHOW(0, max_uw)
79POWER_LIMIT_SHOW(0, step_uw)
80POWER_LIMIT_SHOW(0, tmin_us)
81POWER_LIMIT_SHOW(0, tmax_us)
82
83POWER_LIMIT_SHOW(1, min_uw)
84POWER_LIMIT_SHOW(1, max_uw)
85POWER_LIMIT_SHOW(1, step_uw)
86POWER_LIMIT_SHOW(1, tmin_us)
87POWER_LIMIT_SHOW(1, tmax_us)
88
89static DEVICE_ATTR_RO(power_limit_0_min_uw);
90static DEVICE_ATTR_RO(power_limit_0_max_uw);
91static DEVICE_ATTR_RO(power_limit_0_step_uw);
92static DEVICE_ATTR_RO(power_limit_0_tmin_us);
93static DEVICE_ATTR_RO(power_limit_0_tmax_us);
94
95static DEVICE_ATTR_RO(power_limit_1_min_uw);
96static DEVICE_ATTR_RO(power_limit_1_max_uw);
97static DEVICE_ATTR_RO(power_limit_1_step_uw);
98static DEVICE_ATTR_RO(power_limit_1_tmin_us);
99static DEVICE_ATTR_RO(power_limit_1_tmax_us);
100
101static struct attribute *power_limit_attrs[] = {
102 &dev_attr_power_limit_0_min_uw.attr,
103 &dev_attr_power_limit_1_min_uw.attr,
104 &dev_attr_power_limit_0_max_uw.attr,
105 &dev_attr_power_limit_1_max_uw.attr,
106 &dev_attr_power_limit_0_step_uw.attr,
107 &dev_attr_power_limit_1_step_uw.attr,
108 &dev_attr_power_limit_0_tmin_us.attr,
109 &dev_attr_power_limit_1_tmin_us.attr,
110 &dev_attr_power_limit_0_tmax_us.attr,
111 &dev_attr_power_limit_1_tmax_us.attr,
112 NULL
113};
114
115static struct attribute_group power_limit_attribute_group = {
116 .attrs = power_limit_attrs,
117 .name = "power_limits"
118};
119
120static int proc_thermal_add(struct device *dev,
121 struct proc_thermal_device **priv)
122{
123 struct proc_thermal_device *proc_priv;
124 struct acpi_device *adev;
125 acpi_status status;
126 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
127 union acpi_object *elements, *ppcc;
128 union acpi_object *p;
129 int i;
130
131 adev = ACPI_COMPANION(dev);
132
133 status = acpi_evaluate_object(adev->handle, "PPCC", NULL, &buf);
134 if (ACPI_FAILURE(status))
135 return -ENODEV;
136
137 p = buf.pointer;
138 if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
139 dev_err(dev, "Invalid PPCC data\n");
140 return -EFAULT;
141 }
142 if (!p->package.count) {
143 dev_err(dev, "Invalid PPCC package size\n");
144 return -EFAULT;
145 }
146
147 proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL);
148 if (!proc_priv)
149 return -ENOMEM;
150
151 proc_priv->dev = dev;
152 proc_priv->adev = adev;
153
154 for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
155 elements = &(p->package.elements[i+1]);
156 if (elements->type != ACPI_TYPE_PACKAGE ||
157 elements->package.count != 6)
158 return -EFAULT;
159
160 ppcc = elements->package.elements;
161 proc_priv->power_limits[i].index = ppcc[0].integer.value;
162 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
163 proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
164 proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
165 proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
166 proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
167 }
168
169 *priv = proc_priv;
170