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gpio: sim: fix hogs with custom chip labels

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We always assign the default device name as the chip_label in hog
structures which makes it impossible to assign hogs to chips. Let's
first check if a custom label was set and then copy it instead of the
default device name.

Fixes: cb8c474e79be ("gpio: sim: new testing module")
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
This commit is contained in:
Bartosz Golaszewski 2022-02-08 11:37:56 +01:00
parent cc38ef9368
commit c162ca0bcb
1 changed files with 15 additions and 4 deletions
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19
drivers/gpio/gpio-sim.c
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@ -570,6 +570,11 @@ static struct gpio_sim_bank *to_gpio_sim_bank(struct config_item *item)
return container_of(group, struct gpio_sim_bank, group);
}
static bool gpio_sim_bank_has_label(struct gpio_sim_bank *bank)
{
return bank->label && *bank->label;
}
static struct gpio_sim_device *
gpio_sim_bank_get_device(struct gpio_sim_bank *bank)
{
@ -770,9 +775,15 @@ static int gpio_sim_add_hogs(struct gpio_sim_device *dev)
* point the device doesn't exist yet and so dev_name()
* is not available.
*/
hog->chip_label = kasprintf(GFP_KERNEL,
"gpio-sim.%u-%s", dev->id,
fwnode_get_name(bank->swnode));
if (gpio_sim_bank_has_label(bank))
hog->chip_label = kstrdup(bank->label,
GFP_KERNEL);
else
hog->chip_label = kasprintf(GFP_KERNEL,
"gpio-sim.%u-%s",
dev->id,
fwnode_get_name(
bank->swnode));
if (!hog->chip_label) {
gpio_sim_remove_hogs(dev);
return -ENOMEM;
@ -816,7 +827,7 @@ gpio_sim_make_bank_swnode(struct gpio_sim_bank *bank,
properties[prop_idx++] = PROPERTY_ENTRY_U32("ngpios", bank->num_lines);
if (bank->label && (strlen(bank->label) > 0))
if (gpio_sim_bank_has_label(bank))
properties[prop_idx++] = PROPERTY_ENTRY_STRING("gpio-sim,label",
bank->label);