diff options
Diffstat (limited to 'drivers/pwm/pwm-sti.c')
| -rw-r--r-- | drivers/pwm/pwm-sti.c | 70 |
1 files changed, 40 insertions, 30 deletions
diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c index 6cf55cf34d39..39d80da0e14a 100644 --- a/drivers/pwm/pwm-sti.c +++ b/drivers/pwm/pwm-sti.c @@ -94,7 +94,6 @@ struct sti_pwm_chip { struct regmap_field *pwm_cpt_en; struct regmap_field *pwm_cpt_int_en; struct regmap_field *pwm_cpt_int_stat; - struct pwm_chip chip; struct pwm_device *cur; unsigned long configured; unsigned int en_count; @@ -114,7 +113,7 @@ static const struct reg_field sti_pwm_regfields[MAX_REGFIELDS] = { static inline struct sti_pwm_chip *to_sti_pwmchip(struct pwm_chip *chip) { - return container_of(chip, struct sti_pwm_chip, chip); + return pwmchip_get_drvdata(chip); } /* @@ -395,8 +394,17 @@ out: static int sti_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, const struct pwm_state *state) { + struct sti_pwm_chip *pc = to_sti_pwmchip(chip); + struct sti_pwm_compat_data *cdata = pc->cdata; + struct device *dev = pc->dev; int err; + if (pwm->hwpwm >= cdata->pwm_num_devs) { + dev_err(dev, "device %u is not valid for pwm mode\n", + pwm->hwpwm); + return -EINVAL; + } + if (state->polarity != PWM_POLARITY_NORMAL) return -EINVAL; @@ -498,23 +506,7 @@ static int sti_pwm_probe_dt(struct sti_pwm_chip *pc) { struct device *dev = pc->dev; const struct reg_field *reg_fields; - struct device_node *np = dev->of_node; struct sti_pwm_compat_data *cdata = pc->cdata; - u32 num_devs; - int ret; - - ret = of_property_read_u32(np, "st,pwm-num-chan", &num_devs); - if (!ret) - cdata->pwm_num_devs = num_devs; - - ret = of_property_read_u32(np, "st,capture-num-chan", &num_devs); - if (!ret) - cdata->cpt_num_devs = num_devs; - - if (!cdata->pwm_num_devs && !cdata->cpt_num_devs) { - dev_err(dev, "No channels configured\n"); - return -EINVAL; - } reg_fields = cdata->reg_fields; @@ -560,14 +552,33 @@ static const struct regmap_config sti_pwm_regmap_config = { static int sti_pwm_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + u32 num_devs; + unsigned int pwm_num_devs = 0; + unsigned int cpt_num_devs = 0; struct sti_pwm_compat_data *cdata; + struct pwm_chip *chip; struct sti_pwm_chip *pc; unsigned int i; int irq, ret; - pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL); - if (!pc) - return -ENOMEM; + ret = of_property_read_u32(np, "st,pwm-num-chan", &num_devs); + if (!ret) + pwm_num_devs = num_devs; + + ret = of_property_read_u32(np, "st,capture-num-chan", &num_devs); + if (!ret) + cpt_num_devs = num_devs; + + if (!pwm_num_devs && !cpt_num_devs) { + dev_err(dev, "No channels configured\n"); + return -EINVAL; + } + + chip = devm_pwmchip_alloc(dev, max(pwm_num_devs, cpt_num_devs), sizeof(*pc)); + if (IS_ERR(chip)) + return PTR_ERR(chip); + pc = to_sti_pwmchip(chip); cdata = devm_kzalloc(dev, sizeof(*cdata), GFP_KERNEL); if (!cdata) @@ -600,8 +611,8 @@ static int sti_pwm_probe(struct platform_device *pdev) cdata->reg_fields = sti_pwm_regfields; cdata->max_prescale = 0xff; cdata->max_pwm_cnt = 255; - cdata->pwm_num_devs = 0; - cdata->cpt_num_devs = 0; + cdata->pwm_num_devs = pwm_num_devs; + cdata->cpt_num_devs = cpt_num_devs; pc->cdata = cdata; pc->dev = dev; @@ -644,9 +655,7 @@ static int sti_pwm_probe(struct platform_device *pdev) return -ENOMEM; } - pc->chip.dev = dev; - pc->chip.ops = &sti_pwm_ops; - pc->chip.npwm = pc->cdata->pwm_num_devs; + chip->ops = &sti_pwm_ops; for (i = 0; i < cdata->cpt_num_devs; i++) { struct sti_cpt_ddata *ddata = &cdata->ddata[i]; @@ -655,23 +664,24 @@ static int sti_pwm_probe(struct platform_device *pdev) mutex_init(&ddata->lock); } - ret = pwmchip_add(&pc->chip); + ret = pwmchip_add(chip); if (ret < 0) { clk_unprepare(pc->pwm_clk); clk_unprepare(pc->cpt_clk); return ret; } - platform_set_drvdata(pdev, pc); + platform_set_drvdata(pdev, chip); return 0; } static void sti_pwm_remove(struct platform_device *pdev) { - struct sti_pwm_chip *pc = platform_get_drvdata(pdev); + struct pwm_chip *chip = platform_get_drvdata(pdev); + struct sti_pwm_chip *pc = to_sti_pwmchip(chip); - pwmchip_remove(&pc->chip); + pwmchip_remove(chip); clk_unprepare(pc->pwm_clk); clk_unprepare(pc->cpt_clk); |