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-rw-r--r--drivers/acpi/Kconfig8
-rw-r--r--drivers/acpi/Makefile1
-rw-r--r--drivers/acpi/ac.c20
-rw-r--r--drivers/acpi/acpi_platform.c5
-rw-r--r--drivers/acpi/acpi_processor.c5
-rw-r--r--drivers/acpi/acpi_video.c157
-rw-r--r--drivers/acpi/battery.c22
-rw-r--r--drivers/acpi/blacklist.c8
-rw-r--r--drivers/acpi/cppc_acpi.c80
-rw-r--r--drivers/acpi/internal.h2
-rw-r--r--drivers/acpi/pmic/intel_pmic_chtwc.c280
-rw-r--r--drivers/acpi/pmic/intel_pmic_xpower.c21
-rw-r--r--drivers/acpi/scan.c24
-rw-r--r--drivers/acpi/sysfs.c9
-rw-r--r--drivers/acpi/tables.c16
-rw-r--r--drivers/acpi/utils.c66
16 files changed, 578 insertions, 146 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index c6db511b5f73..de3b8fce5164 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -505,7 +505,7 @@ config CRC_PMIC_OPREGION
config XPOWER_PMIC_OPREGION
bool "ACPI operation region support for XPower AXP288 PMIC"
- depends on AXP288_ADC = y
+ depends on MFD_AXP20X_I2C
help
This config adds ACPI operation region support for XPower AXP288 PMIC.
@@ -515,6 +515,12 @@ config BXT_WC_PMIC_OPREGION
help
This config adds ACPI operation region support for BXT WhiskeyCove PMIC.
+config CHT_WC_PMIC_OPREGION
+ bool "ACPI operation region support for CHT Whiskey Cove PMIC"
+ depends on INTEL_SOC_PMIC_CHTWC
+ help
+ This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
+
endif
config ACPI_CONFIGFS
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index d94f92f88ca1..d78065cc9324 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_PMIC_OPREGION) += pmic/intel_pmic.o
obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
+obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
obj-$(CONFIG_ACPI_CONFIGFS) += acpi_configfs.o
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index f71b756b05c4..8f52483219ba 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -57,12 +57,23 @@ static int acpi_ac_add(struct acpi_device *device);
static int acpi_ac_remove(struct acpi_device *device);
static void acpi_ac_notify(struct acpi_device *device, u32 event);
+struct acpi_ac_bl {
+ const char *hid;
+ int hrv;
+};
+
static const struct acpi_device_id ac_device_ids[] = {
{"ACPI0003", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, ac_device_ids);
+/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
+static const struct acpi_ac_bl acpi_ac_blacklist[] = {
+ { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
+ { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
+};
+
#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev);
#endif
@@ -424,11 +435,20 @@ static int acpi_ac_remove(struct acpi_device *device)
static int __init acpi_ac_init(void)
{
+ unsigned int i;
int result;
if (acpi_disabled)
return -ENODEV;
+ for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
+ if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
+ acpi_ac_blacklist[i].hrv)) {
+ pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
+ acpi_ac_blacklist[i].hid);
+ return -ENODEV;
+ }
+
#ifdef CONFIG_ACPI_PROCFS_POWER
acpi_ac_dir = acpi_lock_ac_dir();
if (!acpi_ac_dir)
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index 03250e1f1103..88cd949003f3 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -121,11 +121,14 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev,
if (IS_ERR(pdev))
dev_err(&adev->dev, "platform device creation failed: %ld\n",
PTR_ERR(pdev));
- else
+ else {
+ set_dev_node(&pdev->dev, acpi_get_node(adev->handle));
dev_dbg(&adev->dev, "created platform device %s\n",
dev_name(&pdev->dev));
+ }
kfree(resources);
+
return pdev;
}
EXPORT_SYMBOL_GPL(acpi_create_platform_device);
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 0143135b3abe..f098e25b6b41 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -388,11 +388,6 @@ static int acpi_processor_add(struct acpi_device *device,
if (result) /* Processor is not physically present or unavailable */
return 0;
-#ifdef CONFIG_SMP
- if (pr->id >= setup_max_cpus && pr->id != 0)
- return 0;
-#endif
-
BUG_ON(pr->id >= nr_cpu_ids);
/*
diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index d00bc0ef87a6..e88fe3632dd6 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -73,6 +73,10 @@ module_param(report_key_events, int, 0644);
MODULE_PARM_DESC(report_key_events,
"0: none, 1: output changes, 2: brightness changes, 3: all");
+/*
+ * Whether the struct acpi_video_device_attrib::device_id_scheme bit should be
+ * assumed even if not actually set.
+ */
static bool device_id_scheme = false;
module_param(device_id_scheme, bool, 0444);
@@ -88,6 +92,18 @@ static int acpi_video_bus_remove(struct acpi_device *device);
static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
void acpi_video_detect_exit(void);
+/*
+ * Indices in the _BCL method response: the first two items are special,
+ * the rest are all supported levels.
+ *
+ * See page 575 of the ACPI spec 3.0
+ */
+enum acpi_video_level_idx {
+ ACPI_VIDEO_AC_LEVEL, /* level when machine has full power */
+ ACPI_VIDEO_BATTERY_LEVEL, /* level when machine is on batteries */
+ ACPI_VIDEO_FIRST_LEVEL, /* actual supported levels begin here */
+};
+
static const struct acpi_device_id video_device_ids[] = {
{ACPI_VIDEO_HID, 0},
{"", 0},
@@ -132,7 +148,15 @@ struct acpi_video_device_attrib {
the VGA device. */
u32 pipe_id:3; /* For VGA multiple-head devices. */
u32 reserved:10; /* Must be 0 */
- u32 device_id_scheme:1; /* Device ID Scheme */
+
+ /*
+ * The device ID might not actually follow the scheme described by this
+ * struct acpi_video_device_attrib. If it does, then this bit
+ * device_id_scheme is set; otherwise, other fields should be ignored.
+ *
+ * (but also see the global flag device_id_scheme)
+ */
+ u32 device_id_scheme:1;
};
struct acpi_video_enumerated_device {
@@ -217,20 +241,16 @@ static int acpi_video_get_brightness(struct backlight_device *bd)
if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false))
return -EINVAL;
- for (i = 2; i < vd->brightness->count; i++) {
+ for (i = ACPI_VIDEO_FIRST_LEVEL; i < vd->brightness->count; i++) {
if (vd->brightness->levels[i] == cur_level)
- /*
- * The first two entries are special - see page 575
- * of the ACPI spec 3.0
- */
- return i - 2;
+ return i - ACPI_VIDEO_FIRST_LEVEL;
}
return 0;
}
static int acpi_video_set_brightness(struct backlight_device *bd)
{
- int request_level = bd->props.brightness + 2;
+ int request_level = bd->props.brightness + ACPI_VIDEO_FIRST_LEVEL;
struct acpi_video_device *vd = bl_get_data(bd);
cancel_delayed_work(&vd->switch_brightness_work);
@@ -244,18 +264,18 @@ static const struct backlight_ops acpi_backlight_ops = {
};
/* thermal cooling device callbacks */
-static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
- long *state)
+static int video_get_max_state(struct thermal_cooling_device *cooling_dev,
+ unsigned long *state)
{
struct acpi_device *device = cooling_dev->devdata;
struct acpi_video_device *video = acpi_driver_data(device);
- *state = video->brightness->count - 3;
+ *state = video->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1;
return 0;
}
-static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
- long *state)
+static int video_get_cur_state(struct thermal_cooling_device *cooling_dev,
+ unsigned long *state)
{
struct acpi_device *device = cooling_dev->devdata;
struct acpi_video_device *video = acpi_driver_data(device);
@@ -264,7 +284,8 @@ static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsig
if (acpi_video_device_lcd_get_level_current(video, &level, false))
return -EINVAL;
- for (offset = 2; offset < video->brightness->count; offset++)
+ for (offset = ACPI_VIDEO_FIRST_LEVEL; offset < video->brightness->count;
+ offset++)
if (level == video->brightness->levels[offset]) {
*state = video->brightness->count - offset - 1;
return 0;
@@ -280,7 +301,7 @@ video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long st
struct acpi_video_device *video = acpi_driver_data(device);
int level;
- if (state >= video->brightness->count - 2)
+ if (state >= video->brightness->count - ACPI_VIDEO_FIRST_LEVEL)
return -EINVAL;
state = video->brightness->count - state;
@@ -345,10 +366,12 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
}
device->brightness->curr = level;
- for (state = 2; state < device->brightness->count; state++)
+ for (state = ACPI_VIDEO_FIRST_LEVEL; state < device->brightness->count;
+ state++)
if (level == device->brightness->levels[state]) {
if (device->backlight)
- device->backlight->props.brightness = state - 2;
+ device->backlight->props.brightness =
+ state - ACPI_VIDEO_FIRST_LEVEL;
return 0;
}
@@ -530,14 +553,16 @@ acpi_video_bqc_value_to_level(struct acpi_video_device *device,
if (device->brightness->flags._BQC_use_index) {
/*
- * _BQC returns an index that doesn't account for
- * the first 2 items with special meaning, so we need
- * to compensate for that by offsetting ourselves
+ * _BQC returns an index that doesn't account for the first 2
+ * items with special meaning (see enum acpi_video_level_idx),
+ * so we need to compensate for that by offsetting ourselves
*/
if (device->brightness->flags._BCL_reversed)
- bqc_value = device->brightness->count - 3 - bqc_value;
+ bqc_value = device->brightness->count -
+ ACPI_VIDEO_FIRST_LEVEL - 1 - bqc_value;
- level = device->brightness->levels[bqc_value + 2];
+ level = device->brightness->levels[bqc_value +
+ ACPI_VIDEO_FIRST_LEVEL];
} else {
level = bqc_value;
}
@@ -571,7 +596,8 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
*level = acpi_video_bqc_value_to_level(device, *level);
- for (i = 2; i < device->brightness->count; i++)
+ for (i = ACPI_VIDEO_FIRST_LEVEL;
+ i < device->brightness->count; i++)
if (device->brightness->levels[i] == *level) {
device->brightness->curr = *level;
return 0;
@@ -714,9 +740,37 @@ static int acpi_video_bqc_quirk(struct acpi_video_device *device,
/*
* Some systems always report current brightness level as maximum
- * through _BQC, we need to test another value for them.
+ * through _BQC, we need to test another value for them. However,
+ * there is a subtlety:
+ *
+ * If the _BCL package ordering is descending, the first level
+ * (br->levels[2]) is likely to be 0, and if the number of levels
+ * matches the number of steps, we might confuse a returned level to
+ * mean the index.
+ *
+ * For example:
+ *
+ * current_level = max_level = 100
+ * test_level = 0
+ * returned level = 100
+ *
+ * In this case 100 means the level, not the index, and _BCM failed.
+ * Still, if the _BCL package ordering is descending, the index of
+ * level 0 is also 100, so we assume _BQC is indexed, when it's not.
+ *
+ * This causes all _BQC calls to return bogus values causing weird
+ * behavior from the user's perspective. For example:
+ *
+ * xbacklight -set 10; xbacklight -set 20;
+ *
+ * would flash to 90% and then slowly down to the desired level (20).
+ *
+ * The solution is simple; test anything other than the first level
+ * (e.g. 1).
*/
- test_level = current_level == max_level ? br->levels[3] : max_level;
+ test_level = current_level == max_level
+ ? br->levels[ACPI_VIDEO_FIRST_LEVEL + 1]
+ : max_level;
result = acpi_video_device_lcd_set_level(device, test_level);
if (result)
@@ -730,8 +784,8 @@ static int acpi_video_bqc_quirk(struct acpi_video_device *device,
/* buggy _BQC found, need to find out if it uses index */
if (level < br->count) {
if (br->flags._BCL_reversed)
- level = br->count - 3 - level;
- if (br->levels[level + 2] == test_level)
+ level = br->count - ACPI_VIDEO_FIRST_LEVEL - 1 - level;
+ if (br->levels[level + ACPI_VIDEO_FIRST_LEVEL] == test_level)
br->flags._BQC_use_index = 1;
}
@@ -761,7 +815,7 @@ int acpi_video_get_levels(struct acpi_device *device,
goto out;
}
- if (obj->package.count < 2) {
+ if (obj->package.count < ACPI_VIDEO_FIRST_LEVEL) {
result = -EINVAL;
goto out;
}
@@ -773,8 +827,13 @@ int acpi_video_get_levels(struct acpi_device *device,
goto out;
}
- br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
- GFP_KERNEL);
+ /*
+ * Note that we have to reserve 2 extra items (ACPI_VIDEO_FIRST_LEVEL),
+ * in order to account for buggy BIOS which don't export the first two
+ * special levels (see below)
+ */
+ br->levels = kmalloc((obj->package.count + ACPI_VIDEO_FIRST_LEVEL) *
+ sizeof(*br->levels), GFP_KERNEL);
if (!br->levels) {
result = -ENOMEM;
goto out_free;
@@ -788,7 +847,8 @@ int acpi_video_get_levels(struct acpi_device *device,
}
value = (u32) o->integer.value;
/* Skip duplicate entries */
- if (count > 2 && br->levels[count - 1] == value)
+ if (count > ACPI_VIDEO_FIRST_LEVEL
+ && br->levels[count - 1] == value)
continue;
br->levels[count] = value;
@@ -804,27 +864,30 @@ int acpi_video_get_levels(struct acpi_device *device,
* In this case, the first two elements in _BCL packages
* are also supported brightness levels that OS should take care of.
*/
- for (i = 2; i < count; i++) {
- if (br->levels[i] == br->levels[0])
+ for (i = ACPI_VIDEO_FIRST_LEVEL; i < count; i++) {
+ if (br->levels[i] == br->levels[ACPI_VIDEO_AC_LEVEL])
level_ac_battery++;
- if (br->levels[i] == br->levels[1])
+ if (br->levels[i] == br->levels[ACPI_VIDEO_BATTERY_LEVEL])
level_ac_battery++;
}
- if (level_ac_battery < 2) {
- level_ac_battery = 2 - level_ac_battery;
+ if (level_ac_battery < ACPI_VIDEO_FIRST_LEVEL) {
+ level_ac_battery = ACPI_VIDEO_FIRST_LEVEL - level_ac_battery;
br->flags._BCL_no_ac_battery_levels = 1;
- for (i = (count - 1 + level_ac_battery); i >= 2; i--)
+ for (i = (count - 1 + level_ac_battery);
+ i >= ACPI_VIDEO_FIRST_LEVEL; i--)
br->levels[i] = br->levels[i - level_ac_battery];
count += level_ac_battery;
- } else if (level_ac_battery > 2)
+ } else if (level_ac_battery > ACPI_VIDEO_FIRST_LEVEL)
ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package"));
/* Check if the _BCL package is in a reversed order */
- if (max_level == br->levels[2]) {
+ if (max_level == br->levels[ACPI_VIDEO_FIRST_LEVEL]) {
br->flags._BCL_reversed = 1;
- sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
- acpi_video_cmp_level, NULL);
+ sort(&br->levels[ACPI_VIDEO_FIRST_LEVEL],
+ count - ACPI_VIDEO_FIRST_LEVEL,
+ sizeof(br->levels[ACPI_VIDEO_FIRST_LEVEL]),
+ acpi_video_cmp_level, NULL);
} else if (max_level != br->levels[count - 1])
ACPI_ERROR((AE_INFO,
"Found unordered _BCL package"));
@@ -894,7 +957,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
* level_old is invalid (no matter whether it's a level
* or an index). Set the backlight to max_level in this case.
*/
- for (i = 2; i < br->count; i++)
+ for (i = ACPI_VIDEO_FIRST_LEVEL; i < br->count; i++)
if (level == br->levels[i])
break;
if (i == br->count || !level)
@@ -906,7 +969,8 @@ set_level:
goto out_free_levels;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "found %d brightness levels\n", br->count - 2));
+ "found %d brightness levels\n",
+ br->count - ACPI_VIDEO_FIRST_LEVEL));
return 0;
out_free_levels:
@@ -1297,7 +1361,7 @@ acpi_video_get_next_level(struct acpi_video_device *device,
max = max_below = 0;
min = min_above = 255;
/* Find closest level to level_current */
- for (i = 2; i < device->brightness->count; i++) {
+ for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) {
l = device->brightness->levels[i];
if (abs(l - level_current) < abs(delta)) {
delta = l - level_current;
@@ -1307,7 +1371,7 @@ acpi_video_get_next_level(struct acpi_video_device *device,
}
/* Ajust level_current to closest available level */
level_current += delta;
- for (i = 2; i < device->brightness->count; i++) {
+ for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) {
l = device->brightness->levels[i];
if (l < min)
min = l;
@@ -1680,7 +1744,8 @@ static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_FIRMWARE;
- props.max_brightness = device->brightness->count - 3;
+ props.max_brightness =
+ device->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1;
device->backlight = backlight_device_register(name,
parent,
device,
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 4ef1e4624b2b..d42eeef9d928 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -67,6 +67,7 @@ MODULE_DESCRIPTION("ACPI Battery Driver");
MODULE_LICENSE("GPL");
static async_cookie_t async_cookie;
+static bool battery_driver_registered;
static int battery_bix_broken_package;
static int battery_notification_delay_ms;
static unsigned int cache_time = 1000;
@@ -93,6 +94,11 @@ static const struct acpi_device_id battery_device_ids[] = {
MODULE_DEVICE_TABLE(acpi, battery_device_ids);
+/* Lists of PMIC ACPI HIDs with an (often better) native battery driver */
+static const char * const acpi_battery_blacklist[] = {
+ "INT33F4", /* X-Powers AXP288 PMIC */
+};
+
enum {
ACPI_BATTERY_ALARM_PRESENT,
ACPI_BATTERY_XINFO_PRESENT,
@@ -1315,8 +1321,17 @@ static struct acpi_driver acpi_battery_driver = {
static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
{
+ unsigned int i;
int result;
+ for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++)
+ if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) {
+ pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME
+ ": found native %s PMIC, not loading\n",
+ acpi_battery_blacklist[i]);
+ return;
+ }
+
dmi_check_system(bat_dmi_table);
#ifdef CONFIG_ACPI_PROCFS_POWER
@@ -1329,6 +1344,7 @@ static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
if (result < 0)
acpi_unlock_battery_dir(acpi_battery_dir);
#endif
+ battery_driver_registered = (result == 0);
}
static int __init acpi_battery_init(void)
@@ -1343,9 +1359,11 @@ static int __init acpi_battery_init(void)
static void __exit acpi_battery_exit(void)
{
async_synchronize_cookie(async_cookie + 1);
- acpi_bus_unregister_driver(&acpi_battery_driver);
+ if (battery_driver_registered)
+ acpi_bus_unregister_driver(&acpi_battery_driver);
#ifdef CONFIG_ACPI_PROCFS_POWER
- acpi_unlock_battery_dir(acpi_battery_dir);
+ if (acpi_battery_dir)
+ acpi_unlock_battery_dir(acpi_battery_dir);
#endif
}
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 4421f7c9981c..bb542acc0574 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -188,6 +188,14 @@ static struct dmi_system_id acpi_rev_dmi_table[] __initdata = {
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 3350"),
},
},
+ {
+ .callback = dmi_enable_rev_override,
+ .ident = "DELL Inspiron 7537",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
+ },
+ },
#endif
{}
};
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 3ca0729f7e0e..6cbe6036da99 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -132,49 +132,54 @@ __ATTR(_name, 0444, show_##_name, NULL)
#define to_cpc_desc(a) container_of(a, struct cpc_desc, kobj)
+#define show_cppc_data(access_fn, struct_name, member_name) \
+ static ssize_t show_##member_name(struct kobject *kobj, \
+ struct attribute *attr, char *buf) \
+ { \
+ struct cpc_desc *cpc_ptr = to_cpc_desc(kobj); \
+ struct struct_name st_name = {0}; \
+ int ret; \
+ \
+ ret = access_fn(cpc_ptr->cpu_id, &st_name); \
+ if (ret) \
+ return ret; \
+ \
+ return scnprintf(buf, PAGE_SIZE, "%llu\n", \
+ (u64)st_name.member_name); \
+ } \
+ define_one_cppc_ro(member_name)
+
+show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, highest_perf);
+show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_perf);
+show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_perf);
+show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_nonlinear_perf);
+show_cppc_data(cppc_get_perf_ctrs, cppc_perf_fb_ctrs, reference_perf);
+show_cppc_data(cppc_get_perf_ctrs, cppc_perf_fb_ctrs, wraparound_time);
+
static ssize_t show_feedback_ctrs(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct cpc_desc *cpc_ptr = to_cpc_desc(kobj);
struct cppc_perf_fb_ctrs fb_ctrs = {0};
+ int ret;
- cppc_get_perf_ctrs(cpc_ptr->cpu_id, &fb_ctrs);
+ ret = cppc_get_perf_ctrs(cpc_ptr->cpu_id, &fb_ctrs);
+ if (ret)
+ return ret;
return scnprintf(buf, PAGE_SIZE, "ref:%llu del:%llu\n",
fb_ctrs.reference, fb_ctrs.delivered);
}
define_one_cppc_ro(feedback_ctrs);
-static ssize_t show_reference_perf(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- struct cpc_desc *cpc_ptr = to_cpc_desc(kobj);
- struct cppc_perf_fb_ctrs fb_ctrs = {0};
-
- cppc_get_perf_ctrs(cpc_ptr->cpu_id, &fb_ctrs);
-
- return scnprintf(buf, PAGE_SIZE, "%llu\n",
- fb_ctrs.reference_perf);
-}
-define_one_cppc_ro(reference_perf);
-
-static ssize_t show_wraparound_time(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- struct cpc_desc *cpc_ptr = to_cpc_desc(kobj);
- struct cppc_perf_fb_ctrs fb_ctrs = {0};
-
- cppc_get_perf_ctrs(cpc_ptr->cpu_id, &fb_ctrs);
-
- return scnprintf(buf, PAGE_SIZE, "%llu\n", fb_ctrs.ctr_wrap_time);
-
-}
-define_one_cppc_ro(wraparound_time);
-
static struct attribute *cppc_attrs[] = {
&feedback_ctrs.attr,
&reference_perf.attr,
&wraparound_time.attr,
+ &highest_perf.attr,
+ &lowest_perf.attr,
+ &lowest_nonlinear_perf.attr,
+ &nominal_perf.attr,
NULL
};
@@ -972,9 +977,9 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps)
{
struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpunum);
- struct cpc_register_resource *highest_reg, *lowest_reg, *ref_perf,
- *nom_perf;
- u64 high, low, nom;
+ struct cpc_register_resource *highest_reg, *lowest_reg,
+ *lowest_non_linear_reg, *nominal_reg;
+ u64 high, low, nom, min_nonlinear;
int ret = 0, regs_in_pcc = 0;
if (!cpc_desc) {
@@ -984,12 +989,12 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps)
highest_reg = &cpc_desc->cpc_regs[HIGHEST_PERF];
lowest_reg = &cpc_desc->cpc_regs[LOWEST_PERF];
- ref_perf = &cpc_desc->cpc_regs[REFERENCE_PERF];
- nom_perf = &cpc_desc->cpc_regs[NOMINAL_PERF];
+ lowest_non_linear_reg = &cpc_desc->cpc_regs[LOW_NON_LINEAR_PERF];
+ nominal_reg = &cpc_desc->cpc_regs[NOMINAL_PERF];
/* Are any of the regs PCC ?*/
if (CPC_IN_PCC(highest_reg) || CPC_IN_PCC(lowest_reg) ||
- CPC_IN_PCC(ref_perf) || CPC_IN_PCC(nom_perf)) {
+ CPC_IN_PCC(lowest_non_linear_reg) || CPC_IN_PCC(nominal_reg)) {
regs_in_pcc = 1;
down_write(&pcc_data.pcc_lock);
/* Ring doorbell once to update PCC subspace */
@@ -1005,10 +1010,13 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps)
cpc_read(cpunum, lowest_reg, &low);
perf_caps->lowest_perf = low;
- cpc_read(cpunum, nom_perf, &nom);
+ cpc_read(cpunum, nominal_reg, &nom);
perf_caps->nominal_perf = nom;
- if (!high || !low || !nom)
+ cpc_read(cpunum, lowest_non_linear_reg, &min_nonlinear);
+ perf_caps->lowest_nonlinear_perf = min_nonlinear;
+
+ if (!high || !low || !nom || !min_nonlinear)
ret = -EFAULT;
out_err:
@@ -1083,7 +1091,7 @@ int cppc_get_perf_ctrs(int cpunum, struct cppc_perf_fb_ctrs *perf_fb_ctrs)
perf_fb_ctrs->delivered = delivered;
perf_fb_ctrs->reference = reference;
perf_fb_ctrs->reference_perf = ref_perf;
- perf_fb_ctrs->ctr_wrap_time = ctr_wrap_time;
+ perf_fb_ctrs->wraparound_time = ctr_wrap_time;
out_err:
if (regs_in_pcc)
up_write(&pcc_data.pcc_lock);
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index f15900132912..66229ffa909b 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -65,8 +65,6 @@ static inline void acpi_cmos_rtc_init(void) {}
#endif
int acpi_rev_override_setup(char *str);
-extern bool acpi_force_hot_remove;
-
void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
const char *name);
int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
diff --git a/drivers/acpi/pmic/intel_pmic_chtwc.c b/drivers/acpi/pmic/intel_pmic_chtwc.c
new file mode 100644
index 000000000000..85636d7a9d39
--- /dev/null
+++ b/drivers/acpi/pmic/intel_pmic_chtwc.c
@@ -0,0 +1,280 @@
+/*
+ * Intel CHT Whiskey Cove PMIC operation region driver
+ * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
+ * Copyright (C) 2013-2015 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/acpi.h>
+#include <linux/init.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include "intel_pmic.h"
+
+#define CHT_WC_V1P05A_CTRL 0x6e3b
+#define CHT_WC_V1P15_CTRL 0x6e3c
+#define CHT_WC_V1P05A_VSEL 0x6e3d
+#define CHT_WC_V1P15_VSEL 0x6e3e
+#define CHT_WC_V1P8A_CTRL 0x6e56
+#define CHT_WC_V1P8SX_CTRL 0x6e57
+#define CHT_WC_VDDQ_CTRL 0x6e58
+#define CHT_WC_V1P2A_CTRL 0x6e59
+#define CHT_WC_V1P2SX_CTRL 0x6e5a
+#define CHT_WC_V1P8A_VSEL 0x6e5b
+#define CHT_WC_VDDQ_VSEL 0x6e5c
+#define CHT_WC_V2P8SX_CTRL 0x6e5d
+#define CHT_WC_V3P3A_CTRL 0x6e5e
+#define CHT_WC_V3P3SD_CTRL 0x6e5f
+#define CHT_WC_VSDIO_CTRL 0x6e67
+#define CHT_WC_V3P3A_VSEL 0x6e68
+#define CHT_WC_VPROG1A_CTRL 0x6e90
+#define CHT_WC_VPROG1B_CTRL 0x6e91
+#define CHT_WC_VPROG1F_CTRL 0x6e95
+#define CHT_WC_VPROG2D_CTRL 0x6e99
+#define CHT_WC_VPROG3A_CTRL 0x6e9a
+#define CHT_WC_VPROG3B_CTRL 0x6e9b
+#define CHT_WC_VPROG4A_CTRL 0x6e9c
+#define CHT_WC_VPROG4B_CTRL 0x6e9d
+#define CHT_WC_VPROG4C_CTRL 0x6e9e
+#define CHT_WC_VPROG4D_CTRL 0x6e9f
+#define CHT_WC_VPROG5A_CTRL 0x6ea0
+#define CHT_WC_VPROG5B_CTRL 0x6ea1
+#define CHT_WC_VPROG6A_CTRL 0x6ea2
+#define CHT_WC_VPROG6B_CTRL 0x6ea3
+#define CHT_WC_VPROG1A_VSEL 0x6ec0
+#define CHT_WC_VPROG1B_VSEL 0x6ec1
+#define CHT_WC_V1P8SX_VSEL 0x6ec2
+#define CHT_WC_V1P2SX_VSEL 0x6ec3
+#define CHT_WC_V1P2A_VSEL 0x6ec4
+#define CHT_WC_VPROG1F_VSEL 0x6ec5
+#define CHT_WC_VSDIO_VSEL 0x6ec6
+#define CHT_WC_V2P8SX_VSEL 0x6ec7
+#define CHT_WC_V3P3SD_VSEL 0x6ec8
+#define CHT_WC_VPROG2D_VSEL 0x6ec9
+#define CHT_WC_VPROG3A_VSEL 0x6eca
+#define CHT_WC_VPROG3B_VSEL 0x6ecb
+#define CHT_WC_VPROG4A_VSEL 0x6ecc
+#define CHT_WC_VPROG4B_VSEL 0x6ecd
+#define CHT_WC_VPROG4C_VSEL 0x6ece
+#define CHT_WC_VPROG4D_VSEL 0x6ecf
+#define CHT_WC_VPROG5A_VSEL 0x6ed0
+#define CHT_WC_VPROG5B_VSEL 0x6ed1
+#define CHT_WC_VPROG6A_VSEL 0x6ed2
+#define CHT_WC_VPROG6B_VSEL 0x6ed3
+
+/*
+ * Regulator support is based on the non upstream patch:
+ * "regulator: whiskey_cove: implements Whiskey Cove pmic VRF support"
+ * https://github.com/intel-aero/meta-intel-aero/blob/master/recipes-kernel/linux/linux-yocto/0019-regulator-whiskey_cove-implements-WhiskeyCove-pmic-V.patch
+ */
+static struct pmic_table power_table[] = {
+ {
+ .address = 0x0,
+ .reg = CHT_WC_V1P8A_CTRL,
+ .bit = 0x01,
+ }, /* V18A */
+ {
+ .address = 0x04,
+ .reg = CHT_WC_V1P8SX_CTRL,
+ .bit = 0x07,
+ }, /* V18X */
+ {
+ .address = 0x08,
+ .reg = CHT_WC_VDDQ_CTRL,
+ .bit = 0x01,
+ }, /* VDDQ */
+ {
+ .address = 0x0c,
+ .reg = CHT_WC_V1P2A_CTRL,
+ .bit = 0x07,
+ }, /* V12A */
+ {
+ .address = 0x10,
+ .reg = CHT_WC_V1P2SX_CTRL,
+ .bit = 0x07,
+ }, /* V12X */
+ {
+ .address = 0x14,
+ .reg = CHT_WC_V2P8SX_CTRL,
+ .bit = 0x07,
+ }, /* V28X */
+ {
+ .address = 0x18,
+ .reg = CHT_WC_V3P3A_CTRL,
+ .bit = 0x01,
+ }, /* V33A */
+ {
+ .address = 0x1c,
+ .reg = CHT_WC_V3P3SD_CTRL,
+ .bit = 0x07,
+ }, /* V3SD */
+ {
+ .address = 0x20,
+ .reg = CHT_WC_VSDIO_CTRL,
+ .bit = 0x07,
+ }, /* VSD */
+/* {
+ .address = 0x24,
+ .reg = ??,
+ .bit = ??,
+ }, ** VSW2 */
+/* {
+ .address = 0x28,
+ .reg = ??,
+ .bit = ??,
+ }, ** VSW1 */
+/* {
+ .address = 0x2c,
+ .reg = ??,
+ .bit = ??,
+ }, ** VUPY */
+/* {
+ .address = 0x30,
+ .reg = ??,
+ .bit = ??,
+ }, ** VRSO */
+ {
+ .address = 0x34,
+ .reg = CHT_WC_VPROG1A_CTRL,
+ .bit = 0x07,
+ }, /* VP1A */
+ {
+ .address = 0x38,
+ .reg = CHT_WC_VPROG1B_CTRL,
+ .bit = 0x07,
+ }, /* VP1B */
+ {
+ .address = 0x3c,
+ .reg = CHT_WC_VPROG1F_CTRL,
+ .bit = 0x07,
+ }, /* VP1F */
+ {
+ .address = 0x40,
+ .reg = CHT_WC_VPROG2D_CTRL,
+ .bit = 0x07,
+ }, /* VP2D */
+ {
+ .address = 0x44,
+ .reg = CHT_WC_VPROG3A_CTRL,
+ .bit = 0x07,
+ }, /* VP3A */
+ {
+ .address = 0x48,
+ .reg = CHT_WC_VPROG3B_CTRL,
+ .bit = 0x07,
+ }, /* VP3B */
+ {
+ .address = 0x4c,
+ .reg = CHT_WC_VPROG4A_CTRL,
+ .bit = 0x07,
+ }, /* VP4A */
+ {
+ .address = 0x50,
+ .reg = CHT_WC_VPROG4B_CTRL,
+ .bit = 0x07,
+ }, /* VP4B */
+ {
+ .address = 0x54,
+ .reg = CHT_WC_VPROG4C_CTRL,
+ .bit = 0x07,
+ }, /* VP4C */
+ {
+ .address = 0x58,
+ .reg = CHT_WC_VPROG4D_CTRL,
+ .bit = 0x07,
+ }, /* VP4D */
+ {
+ .address = 0x5c,
+ .reg = CHT_WC_VPROG5A_CTRL,
+ .bit = 0x07,
+ }, /* VP5A */
+ {
+ .address = 0x60,
+ .reg = CHT_WC_VPROG5B_CTRL,
+ .bit = 0x07,
+ }, /* VP5B */
+ {
+ .address = 0x64,
+ .reg = CHT_WC_VPROG6A_CTRL,
+ .bit = 0x07,
+ }, /* VP6A */
+ {
+ .address = 0x68,
+ .reg = CHT_WC_VPROG6B_CTRL,
+ .bit = 0x07,
+ }, /* VP6B */
+/* {
+ .address = 0x6c,
+ .reg = ??,
+ .bit = ??,
+ } ** VP7A */
+};
+
+static int intel_cht_wc_pmic_get_power(struct regmap *regmap, int reg,
+ int bit, u64 *value)
+{
+ int data;
+
+ if (regmap_read(regmap, reg, &data))
+ return -EIO;
+
+ *value = (data & bit) ? 1 : 0;
+ return 0;
+}
+
+static int intel_cht_wc_pmic_update_power(struct regmap *regmap, int reg,
+ int bitmask, bool on)
+{
+ return regmap_update_bits(regmap, reg, bitmask, on ? 1 : 0);
+}
+
+/*
+ * The thermal table and ops are empty, we do not support the Thermal opregion
+ * (DPTF) due to lacking documentation.
+ */
+static struct intel_pmic_opregion_data intel_cht_wc_pmic_opregion_data = {
+ .get_power = intel_cht_wc_pmic_get_power,
+ .update_power = intel_cht_wc_pmic_update_power,
+ .power_table = power_table,
+ .power_table_count = ARRAY_SIZE(power_table),
+};
+
+static int intel_cht_wc_pmic_opregion_probe(struct platform_device *pdev)
+{
+ struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
+
+ return intel_pmic_install_opregion_handler(&pdev->dev,
+ ACPI_HANDLE(pdev->dev.parent),
+ pmic->regmap,
+ &intel_cht_wc_pmic_opregion_data);
+}
+
+static struct platform_device_id cht_wc_opregion_id_table[] = {
+ { .name = "cht_wcove_region" },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, cht_wc_opregion_id_table);
+
+static struct platform_driver intel_cht_wc_pmic_opregion_driver = {
+ .probe = intel_cht_wc_pmic_opregion_probe,
+ .driver = {
+ .name = "cht_whiskey_cove_pmic",
+ },
+ .id_table = cht_wc_opregion_id_table,
+};
+module_platform_driver(intel_cht_wc_pmic_opregion_driver);
+
+MODULE_DESCRIPTION("Intel CHT Whiskey Cove PMIC operation region driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c
index e6e991ac20f3..55f51115f016 100644
--- a/drivers/acpi/pmic/intel_pmic_xpower.c
+++ b/drivers/acpi/pmic/intel_pmic_xpower.c
@@ -18,7 +18,6 @@
#include <linux/mfd/axp20x.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
-#include <linux/iio/consumer.h>
#include "intel_pmic.h"
#define XPOWER_GPADC_LOW 0x5b
@@ -186,28 +185,16 @@ static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
* @regmap: regmap of the PMIC device
* @reg: register to get the reading
*
- * We could get the sensor value by manipulating the HW regs here, but since
- * the axp288 IIO driver may also access the same regs at the same time, the
- * APIs provided by IIO subsystem are used here instead to avoid problems. As
- * a result, the two passed in params are of no actual use.
- *
* Return a positive value on success, errno on failure.
*/
static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
{
- struct iio_channel *gpadc_chan;
- int ret, val;
-
- gpadc_chan = iio_channel_get(NULL, "axp288-system-temp");
- if (IS_ERR_OR_NULL(gpadc_chan))
- return -EACCES;
+ u8 buf[2];
- ret = iio_read_channel_raw(gpadc_chan, &val);
- if (ret < 0)
- val = ret;
+ if (regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2))
+ return -EIO;
- iio_channel_release(gpadc_chan);
- return val;
+ return (buf[0] << 4) + ((buf[1] >> 4) & 0x0F);
}
static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 2433569b02ef..c26931067415 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -30,12 +30,6 @@ extern struct acpi_device *acpi_root;
#define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page)
-/*
- * If set, devices will be hot-removed even if they cannot be put offline
- * gracefully (from the kernel's standpoint).
- */
-bool acpi_force_hot_remove;
-
static const char *dummy_hid = "device";
static LIST_HEAD(acpi_dep_list);
@@ -170,9 +164,6 @@ static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data,
pn->put_online = false;
}
ret = device_offline(pn->dev);
- if (acpi_force_hot_remove)
- continue;
-
if (ret >= 0) {
pn->put_online = !ret;
} else {
@@ -241,11 +232,11 @@ static int acpi_scan_try_to_offline(struct acpi_device *device)
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
NULL, acpi_bus_offline, (void *)true,
(void **)&errdev);
- if (!errdev || acpi_force_hot_remove)
+ if (!errdev)
acpi_bus_offline(handle, 0, (void *)true,
(void **)&errdev);
- if (errdev && !acpi_force_hot_remove) {
+ if (errdev) {
dev_warn(errdev, "Offline failed.\n");
acpi_bus_online(handle, 0, NULL, NULL);
acpi_walk_namespace(ACPI_TYPE_ANY, handle,
@@ -263,8 +254,7 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
unsigned long long sta;
acpi_status status;
- if (device->handler && device->handler->hotplug.demand_offline
- && !acpi_force_hot_remove) {
+ if (device->handler && device->handler->hotplug.demand_offline) {
if (!acpi_scan_is_offline(device, true))
return -EBUSY;
} else {
@@ -1850,6 +1840,8 @@ static void acpi_bus_attach(struct acpi_device *device)
device->flags.power_manageable = 0;
device->flags.initialized = true;
+ } else if (device->flags.visited) {
+ goto ok;
}
ret = acpi_scan_attach_handler(device);
@@ -1866,10 +1858,10 @@ static void acpi_bus_attach(struct acpi_device *device)
if (ret < 0)
return;
- if (ret > 0 || !device->pnp.type.platform_id)
- acpi_device_set_enumerated(device);
- else
+ if (device->pnp.type.platform_id)
acpi_default_enumeration(device);
+ else
+ acpi_device_set_enumerated(device);
ok:
list_for_each_entry(child, &device->children, node)
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index cf05ae973381..1b5ee1e0e5a3 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -921,7 +921,7 @@ void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
static ssize_t force_remove_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
+ return sprintf(buf, "%d\n", 0);
}
static ssize_t force_remove_store(struct kobject *kobj,
@@ -935,9 +935,10 @@ static ssize_t force_remove_store(struct kobject *kobj,
if (ret < 0)
return ret;
- lock_device_hotplug();
- acpi_force_hot_remove = val;
- unlock_device_hotplug();
+ if (val) {
+ pr_err("Enabling force_remove is not supported anymore. Please report to linux-acpi@vger.kernel.org if you depend on this functionality\n");
+ return -EINVAL;
+ }
return size;
}
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 2604189d6cd1..0dae722ab2ec 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -311,22 +311,6 @@ acpi_parse_entries_array(char *id, unsigned long table_size,
}
int __init
-acpi_parse_entries(char *id,
- unsigned long table_size,
- acpi_tbl_entry_handler handler,
- struct acpi_table_header *table_header,
- int entry_id, unsigned int max_entries)
-{
- struct acpi_subtable_proc proc = {
- .id = entry_id,
- .handler = handler,
- };
-
- return acpi_parse_entries_array(id, table_size, table_header,
- &proc, 1, max_entries);
-}
-
-int __init
acpi_table_parse_entries_array(char *id,
unsigned long table_size,
struct acpi_subtable_proc *proc, int proc_num,
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 22c09952e177..27d0dcfcf47d 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -736,6 +736,72 @@ bool acpi_dev_found(const char *hid)
}
EXPORT_SYMBOL(acpi_dev_found);
+struct acpi_dev_present_info {
+ struct acpi_device_id hid[2];
+ const char *uid;
+ s64 hrv;
+};
+
+static int acpi_dev_present_cb(struct device *dev, void *data)
+{
+ struct acpi_device *adev = to_acpi_device(dev);
+ struct acpi_dev_present_info *match = data;
+ unsigned long long hrv;
+ acpi_status status;
+
+ if (acpi_match_device_ids(adev, match->hid))
+ return 0;
+
+ if (match->uid && (!adev->pnp.unique_id ||
+ strcmp(adev->pnp.unique_id, match->uid)))
+ return 0;
+
+ if (match->hrv == -1)
+ return 1;
+
+ status = acpi_evaluate_integer(adev->handle, "_HRV", NULL, &hrv);
+ if (ACPI_FAILURE(status))
+ return 0;
+
+ return hrv == match->hrv;
+}
+
+/**
+ * acpi_dev_present - Detect that a given ACPI device is present
+ * @hid: Hardware ID of the device.
+ * @uid: Unique ID of the device, pass NULL to not check _UID
+ * @hrv: Hardware Revision of the device, pass -1 to not check _HRV
+ *
+ * Return %true if a matching device was present at the moment of invocation.
+ * Note that if the device is pluggable, it may since have disappeared.
+ *
+ * Note that unlike acpi_dev_found() this function checks the status
+ * of the device. So for devices which are present in the dsdt, but
+ * which are disabled (their _STA callback returns 0) this function
+ * will return false.
+ *
+ * For this function to work, acpi_bus_scan() must have been executed
+ * which happens in the subsys_initcall() subsection. Hence, do not
+ * call from a subsys_initcall() or earlier (use acpi_get_devices()
+ * instead). Calling from module_init() is fine (which is synonymous
+ * with device_initcall()).
+ */
+bool acpi_dev_present(const char *hid, const char *uid, s64 hrv)
+{
+ struct acpi_dev_present_info match = {};
+ struct device *dev;
+
+ strlcpy(match.hid[0].id, hid, sizeof(match.hid[0].id));
+ match.uid = uid;
+ match.hrv = hrv;
+
+ dev = bus_find_device(&acpi_bus_type, NULL, &match,
+ acpi_dev_present_cb);
+
+ return !!dev;
+}
+EXPORT_SYMBOL(acpi_dev_present);
+
/*
* acpi_backlight= handling, this is done here rather then in video_detect.c
* because __setup cannot be used in modules.
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 07:35:29 +0100