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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-19 11:28:36 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-19 11:28:36 -0800
commit89d3fa45b4add00cd0056361a2498e978cb1e119 (patch)
treeb717ab79c3258c3838d7d0753c5aeae61984e17c /drivers/acpi
parent477ea1169667a88d8ee12d83a0b0863091fb8670 (diff)
parent31908f45a583e8f21db37f402b6e8d5739945afd (diff)
downloadlinux-89d3fa45b4add00cd0056361a2498e978cb1e119.tar.bz2
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal managament updates from Zhang Rui: "Specifics: - Abstract the code and introduce helper functions for all int340x thermal drivers. From: Srinivas Pandruvada. - Reorganize the ACPI LPAT table support code so that it can be shared for both ACPI PMIC driver and int340x thermal driver. - Add support for Braswell in intel_soc_dts thermal driver. - a couple of small fixes/cleanups for step_wise governor and int340x thermal driver" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: Thermal/int340x_thermal: remove unused uuids. thermal: step_wise: spelling fixes thermal: int340x: fix sparse warning Thermal/int340x: LPAT conversion for temperature ACPI / PMIC: Use common LPAT table handling functions ACPI / LPAT: Common table processing functions thermal: Intel SoC DTS: Add Braswell support Thermal/int340x/int3402: Provide notification support Thermal/int340x/processor_thermal: Add thermal zone support Thermal/int340x/int3403: Use int340x thermal API Thermal/int340x/int3402: Use int340x thermal API Thermal/int340x: Add common thermal zone handler
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/Makefile1
-rw-r--r--drivers/acpi/acpi_lpat.c161
-rw-r--r--drivers/acpi/pmic/intel_pmic.c133
3 files changed, 180 insertions, 115 deletions
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index b18cd2151ddb..623b117ad1a2 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -55,6 +55,7 @@ acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
ifdef CONFIG_ACPI_VIDEO
acpi-y += video_detect.o
endif
+acpi-y += acpi_lpat.o
# These are (potentially) separate modules
diff --git a/drivers/acpi/acpi_lpat.c b/drivers/acpi/acpi_lpat.c
new file mode 100644
index 000000000000..feb61c1630eb
--- /dev/null
+++ b/drivers/acpi/acpi_lpat.c
@@ -0,0 +1,161 @@
+/*
+ * acpi_lpat.c - LPAT table processing functions
+ *
+ * Copyright (C) 2015 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_lpat.h>
+
+/**
+ * acpi_lpat_raw_to_temp(): Return temperature from raw value through
+ * LPAT conversion table
+ *
+ * @lpat_table: the temperature_raw mapping table structure
+ * @raw: the raw value, used as a key to get the temerature from the
+ * above mapping table
+ *
+ * A positive converted temperarure value will be returned on success,
+ * a negative errno will be returned in error cases.
+ */
+int acpi_lpat_raw_to_temp(struct acpi_lpat_conversion_table *lpat_table,
+ int raw)
+{
+ int i, delta_temp, delta_raw, temp;
+ struct acpi_lpat *lpat = lpat_table->lpat;
+
+ for (i = 0; i < lpat_table->lpat_count - 1; i++) {
+ if ((raw >= lpat[i].raw && raw <= lpat[i+1].raw) ||
+ (raw <= lpat[i].raw && raw >= lpat[i+1].raw))
+ break;
+ }
+
+ if (i == lpat_table->lpat_count - 1)
+ return -ENOENT;
+
+ delta_temp = lpat[i+1].temp - lpat[i].temp;
+ delta_raw = lpat[i+1].raw - lpat[i].raw;
+ temp = lpat[i].temp + (raw - lpat[i].raw) * delta_temp / delta_raw;
+
+ return temp;
+}
+EXPORT_SYMBOL_GPL(acpi_lpat_raw_to_temp);
+
+/**
+ * acpi_lpat_temp_to_raw(): Return raw value from temperature through
+ * LPAT conversion table
+ *
+ * @lpat: the temperature_raw mapping table
+ * @temp: the temperature, used as a key to get the raw value from the
+ * above mapping table
+ *
+ * A positive converted temperature value will be returned on success,
+ * a negative errno will be returned in error cases.
+ */
+int acpi_lpat_temp_to_raw(struct acpi_lpat_conversion_table *lpat_table,
+ int temp)
+{
+ int i, delta_temp, delta_raw, raw;
+ struct acpi_lpat *lpat = lpat_table->lpat;
+
+ for (i = 0; i < lpat_table->lpat_count - 1; i++) {
+ if (temp >= lpat[i].temp && temp <= lpat[i+1].temp)
+ break;
+ }
+
+ if (i == lpat_table->lpat_count - 1)
+ return -ENOENT;
+
+ delta_temp = lpat[i+1].temp - lpat[i].temp;
+ delta_raw = lpat[i+1].raw - lpat[i].raw;
+ raw = lpat[i].raw + (temp - lpat[i].temp) * delta_raw / delta_temp;
+
+ return raw;
+}
+EXPORT_SYMBOL_GPL(acpi_lpat_temp_to_raw);
+
+/**
+ * acpi_lpat_get_conversion_table(): Parse ACPI LPAT table if present.
+ *
+ * @handle: Handle to acpi device
+ *
+ * Parse LPAT table to a struct of type acpi_lpat_table. On success
+ * it returns a pointer to newly allocated table. This table must
+ * be freed by the caller when finished processing, using a call to
+ * acpi_lpat_free_conversion_table.
+ */
+struct acpi_lpat_conversion_table *acpi_lpat_get_conversion_table(acpi_handle
+ handle)
+{
+ struct acpi_lpat_conversion_table *lpat_table = NULL;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj_p, *obj_e;
+ int *lpat, i;
+ acpi_status status;
+
+ status = acpi_evaluate_object(handle, "LPAT", NULL, &buffer);
+ if (ACPI_FAILURE(status))
+ return NULL;
+
+ obj_p = (union acpi_object *)buffer.pointer;
+ if (!obj_p || (obj_p->type != ACPI_TYPE_PACKAGE) ||
+ (obj_p->package.count % 2) || (obj_p->package.count < 4))
+ goto out;
+
+ lpat = kcalloc(obj_p->package.count, sizeof(int), GFP_KERNEL);
+ if (!lpat)
+ goto out;
+
+ for (i = 0; i < obj_p->package.count; i++) {
+ obj_e = &obj_p->package.elements[i];
+ if (obj_e->type != ACPI_TYPE_INTEGER) {
+ kfree(lpat);
+ goto out;
+ }
+ lpat[i] = (s64)obj_e->integer.value;
+ }
+
+ lpat_table = kzalloc(sizeof(*lpat_table), GFP_KERNEL);
+ if (!lpat_table) {
+ kfree(lpat);
+ goto out;
+ }
+
+ lpat_table->lpat = (struct acpi_lpat *)lpat;
+ lpat_table->lpat_count = obj_p->package.count / 2;
+
+out:
+ kfree(buffer.pointer);
+ return lpat_table;
+}
+EXPORT_SYMBOL_GPL(acpi_lpat_get_conversion_table);
+
+/**
+ * acpi_lpat_free_conversion_table(): Free LPAT table.
+ *
+ * @lpat_table: the temperature_raw mapping table structure
+ *
+ * Frees the LPAT table previously allocated by a call to
+ * acpi_lpat_get_conversion_table.
+ */
+void acpi_lpat_free_conversion_table(struct acpi_lpat_conversion_table
+ *lpat_table)
+{
+ if (lpat_table) {
+ kfree(lpat_table->lpat);
+ kfree(lpat_table);
+ }
+}
+EXPORT_SYMBOL_GPL(acpi_lpat_free_conversion_table);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c
index a732e5d7e322..bd772cd56494 100644
--- a/drivers/acpi/pmic/intel_pmic.c
+++ b/drivers/acpi/pmic/intel_pmic.c
@@ -16,20 +16,15 @@
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/regmap.h>
+#include <acpi/acpi_lpat.h>
#include "intel_pmic.h"
#define PMIC_POWER_OPREGION_ID 0x8d
#define PMIC_THERMAL_OPREGION_ID 0x8c
-struct acpi_lpat {
- int temp;
- int raw;
-};
-
struct intel_pmic_opregion {
struct mutex lock;
- struct acpi_lpat *lpat;
- int lpat_count;
+ struct acpi_lpat_conversion_table *lpat_table;
struct regmap *regmap;
struct intel_pmic_opregion_data *data;
};
@@ -50,105 +45,6 @@ static int pmic_get_reg_bit(int address, struct pmic_table *table,
return -ENOENT;
}
-/**
- * raw_to_temp(): Return temperature from raw value through LPAT table
- *
- * @lpat: the temperature_raw mapping table
- * @count: the count of the above mapping table
- * @raw: the raw value, used as a key to get the temerature from the
- * above mapping table
- *
- * A positive value will be returned on success, a negative errno will
- * be returned in error cases.
- */
-static int raw_to_temp(struct acpi_lpat *lpat, int count, int raw)
-{
- int i, delta_temp, delta_raw, temp;
-
- for (i = 0; i < count - 1; i++) {
- if ((raw >= lpat[i].raw && raw <= lpat[i+1].raw) ||
- (raw <= lpat[i].raw && raw >= lpat[i+1].raw))
- break;
- }
-
- if (i == count - 1)
- return -ENOENT;
-
- delta_temp = lpat[i+1].temp - lpat[i].temp;
- delta_raw = lpat[i+1].raw - lpat[i].raw;
- temp = lpat[i].temp + (raw - lpat[i].raw) * delta_temp / delta_raw;
-
- return temp;
-}
-
-/**
- * temp_to_raw(): Return raw value from temperature through LPAT table
- *
- * @lpat: the temperature_raw mapping table
- * @count: the count of the above mapping table
- * @temp: the temperature, used as a key to get the raw value from the
- * above mapping table
- *
- * A positive value will be returned on success, a negative errno will
- * be returned in error cases.
- */
-static int temp_to_raw(struct acpi_lpat *lpat, int count, int temp)
-{
- int i, delta_temp, delta_raw, raw;
-
- for (i = 0; i < count - 1; i++) {
- if (temp >= lpat[i].temp && temp <= lpat[i+1].temp)
- break;
- }
-
- if (i == count - 1)
- return -ENOENT;
-
- delta_temp = lpat[i+1].temp - lpat[i].temp;
- delta_raw = lpat[i+1].raw - lpat[i].raw;
- raw = lpat[i].raw + (temp - lpat[i].temp) * delta_raw / delta_temp;
-
- return raw;
-}
-
-static void pmic_thermal_lpat(struct intel_pmic_opregion *opregion,
- acpi_handle handle, struct device *dev)
-{
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *obj_p, *obj_e;
- int *lpat, i;
- acpi_status status;
-
- status = acpi_evaluate_object(handle, "LPAT", NULL, &buffer);
- if (ACPI_FAILURE(status))
- return;
-
- obj_p = (union acpi_object *)buffer.pointer;
- if (!obj_p || (obj_p->type != ACPI_TYPE_PACKAGE) ||
- (obj_p->package.count % 2) || (obj_p->package.count < 4))
- goto out;
-
- lpat = devm_kmalloc(dev, sizeof(int) * obj_p->package.count,
- GFP_KERNEL);
- if (!lpat)
- goto out;
-
- for (i = 0; i < obj_p->package.count; i++) {
- obj_e = &obj_p->package.elements[i];
- if (obj_e->type != ACPI_TYPE_INTEGER) {
- devm_kfree(dev, lpat);
- goto out;
- }
- lpat[i] = (s64)obj_e->integer.value;
- }
-
- opregion->lpat = (struct acpi_lpat *)lpat;
- opregion->lpat_count = obj_p->package.count / 2;
-
-out:
- kfree(buffer.pointer);
-}
-
static acpi_status intel_pmic_power_handler(u32 function,
acpi_physical_address address, u32 bits, u64 *value64,
void *handler_context, void *region_context)
@@ -192,12 +88,12 @@ static int pmic_read_temp(struct intel_pmic_opregion *opregion,
if (raw_temp < 0)
return raw_temp;
- if (!opregion->lpat) {
+ if (!opregion->lpat_table) {
*value = raw_temp;
return 0;
}
- temp = raw_to_temp(opregion->lpat, opregion->lpat_count, raw_temp);
+ temp = acpi_lpat_raw_to_temp(opregion->lpat_table, raw_temp);
if (temp < 0)
return temp;
@@ -223,9 +119,8 @@ static int pmic_thermal_aux(struct intel_pmic_opregion *opregion, int reg,
if (!opregion->data->update_aux)
return -ENXIO;
- if (opregion->lpat) {
- raw_temp = temp_to_raw(opregion->lpat, opregion->lpat_count,
- *value);
+ if (opregion->lpat_table) {
+ raw_temp = acpi_lpat_temp_to_raw(opregion->lpat_table, *value);
if (raw_temp < 0)
return raw_temp;
} else {
@@ -314,6 +209,7 @@ int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle,
{
acpi_status status;
struct intel_pmic_opregion *opregion;
+ int ret;
if (!dev || !regmap || !d)
return -EINVAL;
@@ -327,14 +223,16 @@ int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle,
mutex_init(&opregion->lock);
opregion->regmap = regmap;
- pmic_thermal_lpat(opregion, handle, dev);
+ opregion->lpat_table = acpi_lpat_get_conversion_table(handle);
status = acpi_install_address_space_handler(handle,
PMIC_POWER_OPREGION_ID,
intel_pmic_power_handler,
NULL, opregion);
- if (ACPI_FAILURE(status))
- return -ENODEV;
+ if (ACPI_FAILURE(status)) {
+ ret = -ENODEV;
+ goto out_error;
+ }
status = acpi_install_address_space_handler(handle,
PMIC_THERMAL_OPREGION_ID,
@@ -343,11 +241,16 @@ int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle,
if (ACPI_FAILURE(status)) {
acpi_remove_address_space_handler(handle, PMIC_POWER_OPREGION_ID,
intel_pmic_power_handler);
- return -ENODEV;
+ ret = -ENODEV;
+ goto out_error;
}
opregion->data = d;
return 0;
+
+out_error:
+ acpi_lpat_free_conversion_table(opregion->lpat_table);
+ return ret;
}
EXPORT_SYMBOL_GPL(intel_pmic_install_opregion_handler);