diff options
Diffstat (limited to 'drivers/pwm/pwm-lpc18xx-sct.c')
| -rw-r--r-- | drivers/pwm/pwm-lpc18xx-sct.c | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/drivers/pwm/pwm-lpc18xx-sct.c b/drivers/pwm/pwm-lpc18xx-sct.c index fe891fa71a1d..04b76d257fd8 100644 --- a/drivers/pwm/pwm-lpc18xx-sct.c +++ b/drivers/pwm/pwm-lpc18xx-sct.c @@ -92,8 +92,6 @@ struct lpc18xx_pwm_data { }; struct lpc18xx_pwm_chip { - struct device *dev; - struct pwm_chip chip; void __iomem *base; struct clk *pwm_clk; unsigned long clk_rate; @@ -110,7 +108,7 @@ struct lpc18xx_pwm_chip { static inline struct lpc18xx_pwm_chip * to_lpc18xx_pwm_chip(struct pwm_chip *chip) { - return container_of(chip, struct lpc18xx_pwm_chip, chip); + return pwmchip_get_drvdata(chip); } static inline void lpc18xx_pwm_writel(struct lpc18xx_pwm_chip *lpc18xx_pwm, @@ -198,7 +196,7 @@ static int lpc18xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, if (period_ns < lpc18xx_pwm->min_period_ns || period_ns > lpc18xx_pwm->max_period_ns) { - dev_err(chip->dev, "period %d not in range\n", period_ns); + dev_err(pwmchip_parent(chip), "period %d not in range\n", period_ns); return -ERANGE; } @@ -214,7 +212,7 @@ static int lpc18xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, */ if (requested_events > 2 && lpc18xx_pwm->period_ns != period_ns && lpc18xx_pwm->period_ns) { - dev_err(chip->dev, "conflicting period requested for PWM %u\n", + dev_err(pwmchip_parent(chip), "conflicting period requested for PWM %u\n", pwm->hwpwm); mutex_unlock(&lpc18xx_pwm->period_lock); return -EBUSY; @@ -289,7 +287,7 @@ static int lpc18xx_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) LPC18XX_PWM_EVENT_MAX); if (event >= LPC18XX_PWM_EVENT_MAX) { - dev_err(lpc18xx_pwm->dev, + dev_err(pwmchip_parent(chip), "maximum number of simultaneous channels reached\n"); return -EBUSY; } @@ -349,16 +347,15 @@ MODULE_DEVICE_TABLE(of, lpc18xx_pwm_of_match); static int lpc18xx_pwm_probe(struct platform_device *pdev) { + struct pwm_chip *chip; struct lpc18xx_pwm_chip *lpc18xx_pwm; int ret; u64 val; - lpc18xx_pwm = devm_kzalloc(&pdev->dev, sizeof(*lpc18xx_pwm), - GFP_KERNEL); - if (!lpc18xx_pwm) - return -ENOMEM; - - lpc18xx_pwm->dev = &pdev->dev; + chip = devm_pwmchip_alloc(&pdev->dev, LPC18XX_NUM_PWMS, sizeof(*lpc18xx_pwm)); + if (IS_ERR(chip)) + return PTR_ERR(chip); + lpc18xx_pwm = to_lpc18xx_pwm_chip(chip); lpc18xx_pwm->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(lpc18xx_pwm->base)) @@ -389,9 +386,7 @@ static int lpc18xx_pwm_probe(struct platform_device *pdev) lpc18xx_pwm->min_period_ns = DIV_ROUND_UP(NSEC_PER_SEC, lpc18xx_pwm->clk_rate); - lpc18xx_pwm->chip.dev = &pdev->dev; - lpc18xx_pwm->chip.ops = &lpc18xx_pwm_ops; - lpc18xx_pwm->chip.npwm = LPC18XX_NUM_PWMS; + chip->ops = &lpc18xx_pwm_ops; /* SCT counter must be in unify (32 bit) mode */ lpc18xx_pwm_writel(lpc18xx_pwm, LPC18XX_PWM_CONFIG, @@ -423,21 +418,22 @@ static int lpc18xx_pwm_probe(struct platform_device *pdev) val |= LPC18XX_PWM_PRE(0); lpc18xx_pwm_writel(lpc18xx_pwm, LPC18XX_PWM_CTRL, val); - ret = pwmchip_add(&lpc18xx_pwm->chip); + ret = pwmchip_add(chip); if (ret < 0) return dev_err_probe(&pdev->dev, ret, "pwmchip_add failed\n"); - platform_set_drvdata(pdev, lpc18xx_pwm); + platform_set_drvdata(pdev, chip); return 0; } static void lpc18xx_pwm_remove(struct platform_device *pdev) { - struct lpc18xx_pwm_chip *lpc18xx_pwm = platform_get_drvdata(pdev); + struct pwm_chip *chip = platform_get_drvdata(pdev); + struct lpc18xx_pwm_chip *lpc18xx_pwm = to_lpc18xx_pwm_chip(chip); u32 val; - pwmchip_remove(&lpc18xx_pwm->chip); + pwmchip_remove(chip); val = lpc18xx_pwm_readl(lpc18xx_pwm, LPC18XX_PWM_CTRL); lpc18xx_pwm_writel(lpc18xx_pwm, LPC18XX_PWM_CTRL, |