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path: root/drivers/gpio/gpio-sim.c
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Diffstat (limited to 'drivers/gpio/gpio-sim.c')
-rw-r--r--drivers/gpio/gpio-sim.c49
1 files changed, 28 insertions, 21 deletions
diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index c4106e37e6db..2ed5cbe7c8a8 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -22,6 +22,7 @@
#include <linux/irq_sim.h>
#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/lockdep.h>
#include <linux/minmax.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
@@ -234,10 +235,10 @@ static void gpio_sim_dbg_show(struct seq_file *seq, struct gpio_chip *gc)
guard(mutex)(&chip->lock);
- for_each_requested_gpio(gc, i, label)
+ for_each_hwgpio(gc, i, label)
seq_printf(seq, " gpio-%-3d (%s) %s,%s\n",
gc->base + i,
- label,
+ label ?: "<unused>",
test_bit(i, chip->direction_map) ? "input" :
test_bit(i, chip->value_map) ? "output-high" :
"output-low",
@@ -420,7 +421,7 @@ static int gpio_sim_add_bank(struct fwnode_handle *swnode, struct device *dev)
ret = fwnode_property_read_string(swnode, "gpio-sim,label", &label);
if (ret) {
- label = devm_kasprintf(dev, GFP_KERNEL, "%s-%pfwP",
+ label = devm_kasprintf(dev, GFP_KERNEL, "%s:%pfwP",
dev_name(dev), swnode);
if (!label)
return -ENOMEM;
@@ -697,8 +698,10 @@ static struct gpio_sim_device *gpio_sim_hog_get_device(struct gpio_sim_hog *hog)
return gpio_sim_line_get_device(line);
}
-static bool gpio_sim_device_is_live_unlocked(struct gpio_sim_device *dev)
+static bool gpio_sim_device_is_live(struct gpio_sim_device *dev)
{
+ lockdep_assert_held(&dev->lock);
+
return !!dev->pdev;
}
@@ -737,7 +740,7 @@ gpio_sim_device_config_live_show(struct config_item *item, char *page)
bool live;
scoped_guard(mutex, &dev->lock)
- live = gpio_sim_device_is_live_unlocked(dev);
+ live = gpio_sim_device_is_live(dev);
return sprintf(page, "%c\n", live ? '1' : '0');
}
@@ -833,7 +836,7 @@ static int gpio_sim_add_hogs(struct gpio_sim_device *dev)
GFP_KERNEL);
else
hog->chip_label = kasprintf(GFP_KERNEL,
- "gpio-sim.%u-%pfwP",
+ "gpio-sim.%u:%pfwP",
dev->id,
bank->swnode);
if (!hog->chip_label) {
@@ -926,7 +929,7 @@ static bool gpio_sim_bank_labels_non_unique(struct gpio_sim_device *dev)
return false;
}
-static int gpio_sim_device_activate_unlocked(struct gpio_sim_device *dev)
+static int gpio_sim_device_activate(struct gpio_sim_device *dev)
{
struct platform_device_info pdevinfo;
struct fwnode_handle *swnode;
@@ -934,6 +937,8 @@ static int gpio_sim_device_activate_unlocked(struct gpio_sim_device *dev)
struct gpio_sim_bank *bank;
int ret;
+ lockdep_assert_held(&dev->lock);
+
if (list_empty(&dev->bank_list))
return -ENODATA;
@@ -998,10 +1003,12 @@ static int gpio_sim_device_activate_unlocked(struct gpio_sim_device *dev)
return 0;
}
-static void gpio_sim_device_deactivate_unlocked(struct gpio_sim_device *dev)
+static void gpio_sim_device_deactivate(struct gpio_sim_device *dev)
{
struct fwnode_handle *swnode;
+ lockdep_assert_held(&dev->lock);
+
swnode = dev_fwnode(&dev->pdev->dev);
platform_device_unregister(dev->pdev);
gpio_sim_remove_hogs(dev);
@@ -1023,12 +1030,12 @@ gpio_sim_device_config_live_store(struct config_item *item,
guard(mutex)(&dev->lock);
- if (live == gpio_sim_device_is_live_unlocked(dev))
+ if (live == gpio_sim_device_is_live(dev))
ret = -EPERM;
else if (live)
- ret = gpio_sim_device_activate_unlocked(dev);
+ ret = gpio_sim_device_activate(dev);
else
- gpio_sim_device_deactivate_unlocked(dev);
+ gpio_sim_device_deactivate(dev);
return ret ?: count;
}
@@ -1069,7 +1076,7 @@ static ssize_t gpio_sim_bank_config_chip_name_show(struct config_item *item,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return device_for_each_child(&dev->pdev->dev, &ctx,
gpio_sim_emit_chip_name);
@@ -1098,7 +1105,7 @@ static ssize_t gpio_sim_bank_config_label_store(struct config_item *item,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return -EBUSY;
trimmed = gpio_sim_strdup_trimmed(page, count);
@@ -1142,7 +1149,7 @@ gpio_sim_bank_config_num_lines_store(struct config_item *item,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return -EBUSY;
bank->num_lines = num_lines;
@@ -1179,7 +1186,7 @@ static ssize_t gpio_sim_line_config_name_store(struct config_item *item,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return -EBUSY;
trimmed = gpio_sim_strdup_trimmed(page, count);
@@ -1219,7 +1226,7 @@ static ssize_t gpio_sim_hog_config_name_store(struct config_item *item,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return -EBUSY;
trimmed = gpio_sim_strdup_trimmed(page, count);
@@ -1274,7 +1281,7 @@ gpio_sim_hog_config_direction_store(struct config_item *item,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return -EBUSY;
if (sysfs_streq(page, "input"))
@@ -1392,7 +1399,7 @@ gpio_sim_bank_config_make_line_group(struct config_group *group,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return ERR_PTR(-EBUSY);
line = kzalloc(sizeof(*line), GFP_KERNEL);
@@ -1445,7 +1452,7 @@ gpio_sim_device_config_make_bank_group(struct config_group *group,
guard(mutex)(&dev->lock);
- if (gpio_sim_device_is_live_unlocked(dev))
+ if (gpio_sim_device_is_live(dev))
return ERR_PTR(-EBUSY);
bank = kzalloc(sizeof(*bank), GFP_KERNEL);
@@ -1467,8 +1474,8 @@ static void gpio_sim_device_config_group_release(struct config_item *item)
struct gpio_sim_device *dev = to_gpio_sim_device(item);
scoped_guard(mutex, &dev->lock) {
- if (gpio_sim_device_is_live_unlocked(dev))
- gpio_sim_device_deactivate_unlocked(dev);
+ if (gpio_sim_device_is_live(dev))
+ gpio_sim_device_deactivate(dev);
}
mutex_destroy(&dev->lock);
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-19 02:26:31 +0300