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platform_kernel-5.15
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pwm: core: Reuse fwnode_to_pwmchip() in ACPI case 

In ACPI case we may use matching by fwnode as provided via
fwnode_to_pwmchip(). This makes device_to_pwmchip() not needed
anymore.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Andy Shevchenko 2021-06-07 15:24:55 +03:00 committed by Thierry Reding
parent ca06616b1e
commit e5c38ba9f2
1 changed files with 1 additions and 30 deletions
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31
drivers/pwm/core.c
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@ -827,28 +827,6 @@ struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np,
}
EXPORT_SYMBOL_GPL(of_pwm_get);
#if IS_ENABLED(CONFIG_ACPI)
static struct pwm_chip *device_to_pwmchip(struct device *dev)
{
struct pwm_chip *chip;
mutex_lock(&pwm_lock);
list_for_each_entry(chip, &pwm_chips, list) {
struct acpi_device *adev = ACPI_COMPANION(chip->dev);
if ((chip->dev == dev) || (adev && &adev->dev == dev)) {
mutex_unlock(&pwm_lock);
return chip;
}
}
mutex_unlock(&pwm_lock);
return ERR_PTR(-EPROBE_DEFER);
}
#endif
/**
* acpi_pwm_get() - request a PWM via parsing "pwms" property in ACPI
* @fwnode: firmware node to get the "pwm" property from
@ -869,9 +847,7 @@ static struct pwm_chip *device_to_pwmchip(struct device *dev)
static struct pwm_device *acpi_pwm_get(struct fwnode_handle *fwnode)
{
struct pwm_device *pwm = ERR_PTR(-ENODEV);
#if IS_ENABLED(CONFIG_ACPI)
struct fwnode_reference_args args;
struct acpi_device *acpi;
struct pwm_chip *chip;
int ret;
@ -881,14 +857,10 @@ static struct pwm_device *acpi_pwm_get(struct fwnode_handle *fwnode)
if (ret < 0)
return ERR_PTR(ret);
acpi = to_acpi_device_node(args.fwnode);
if (!acpi)
return ERR_PTR(-EINVAL);
if (args.nargs < 2)
return ERR_PTR(-EPROTO);
chip = device_to_pwmchip(&acpi->dev);
chip = fwnode_to_pwmchip(args.fwnode);
if (IS_ERR(chip))
return ERR_CAST(chip);
@ -901,7 +873,6 @@ static struct pwm_device *acpi_pwm_get(struct fwnode_handle *fwnode)
if (args.nargs > 2 && args.args[2] & PWM_POLARITY_INVERTED)
pwm->args.polarity = PWM_POLARITY_INVERSED;
#endif
return pwm;
}