diff options
Diffstat (limited to 'drivers/pwm/pwm-iqs620a.c')
| -rw-r--r-- | drivers/pwm/pwm-iqs620a.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/pwm/pwm-iqs620a.c b/drivers/pwm/pwm-iqs620a.c index 378ab036ed..13e5e138c8 100644 --- a/drivers/pwm/pwm-iqs620a.c +++ b/drivers/pwm/pwm-iqs620a.c @@ -34,12 +34,17 @@ struct iqs620_pwm_private { struct iqs62x_core *iqs62x; - struct pwm_chip chip; + struct device *dev; struct notifier_block notifier; struct mutex lock; unsigned int duty_scale; }; +static inline struct iqs620_pwm_private *iqs620_pwm_from_chip(struct pwm_chip *chip) +{ + return pwmchip_get_drvdata(chip); +} + static int iqs620_pwm_init(struct iqs620_pwm_private *iqs620_pwm, unsigned int duty_scale) { @@ -73,7 +78,7 @@ static int iqs620_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, if (state->period < IQS620_PWM_PERIOD_NS) return -EINVAL; - iqs620_pwm = container_of(chip, struct iqs620_pwm_private, chip); + iqs620_pwm = iqs620_pwm_from_chip(chip); /* * The duty cycle generated by the device is calculated as follows: @@ -109,7 +114,7 @@ static int iqs620_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm, { struct iqs620_pwm_private *iqs620_pwm; - iqs620_pwm = container_of(chip, struct iqs620_pwm_private, chip); + iqs620_pwm = iqs620_pwm_from_chip(chip); mutex_lock(&iqs620_pwm->lock); @@ -155,7 +160,7 @@ static int iqs620_pwm_notifier(struct notifier_block *notifier, mutex_unlock(&iqs620_pwm->lock); if (ret) { - dev_err(iqs620_pwm->chip.dev, + dev_err(iqs620_pwm->dev, "Failed to re-initialize device: %d\n", ret); return NOTIFY_BAD; } @@ -176,21 +181,24 @@ static void iqs620_pwm_notifier_unregister(void *context) ret = blocking_notifier_chain_unregister(&iqs620_pwm->iqs62x->nh, &iqs620_pwm->notifier); if (ret) - dev_err(iqs620_pwm->chip.dev, + dev_err(iqs620_pwm->dev, "Failed to unregister notifier: %d\n", ret); } static int iqs620_pwm_probe(struct platform_device *pdev) { struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); + struct pwm_chip *chip; struct iqs620_pwm_private *iqs620_pwm; unsigned int val; int ret; - iqs620_pwm = devm_kzalloc(&pdev->dev, sizeof(*iqs620_pwm), GFP_KERNEL); - if (!iqs620_pwm) - return -ENOMEM; + chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*iqs620_pwm)); + if (IS_ERR(chip)) + return PTR_ERR(chip); + iqs620_pwm = iqs620_pwm_from_chip(chip); + iqs620_pwm->dev = &pdev->dev; iqs620_pwm->iqs62x = iqs62x; ret = regmap_read(iqs62x->regmap, IQS620_PWR_SETTINGS, &val); @@ -205,9 +213,7 @@ static int iqs620_pwm_probe(struct platform_device *pdev) iqs620_pwm->duty_scale = val + 1; } - iqs620_pwm->chip.dev = &pdev->dev; - iqs620_pwm->chip.ops = &iqs620_pwm_ops; - iqs620_pwm->chip.npwm = 1; + chip->ops = &iqs620_pwm_ops; mutex_init(&iqs620_pwm->lock); @@ -225,7 +231,7 @@ static int iqs620_pwm_probe(struct platform_device *pdev) if (ret) return ret; - ret = devm_pwmchip_add(&pdev->dev, &iqs620_pwm->chip); + ret = devm_pwmchip_add(&pdev->dev, chip); if (ret) dev_err(&pdev->dev, "Failed to add device: %d\n", ret); |