diff options
Diffstat (limited to 'drivers/pwm/pwm-samsung.c')
| -rw-r--r-- | drivers/pwm/pwm-samsung.c | 94 |
1 files changed, 36 insertions, 58 deletions
diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c index 6e77302f73..efb60c9f0c 100644 --- a/drivers/pwm/pwm-samsung.c +++ b/drivers/pwm/pwm-samsung.c @@ -69,7 +69,6 @@ struct samsung_pwm_channel { /** * struct samsung_pwm_chip - private data of PWM chip - * @chip: generic PWM chip * @variant: local copy of hardware variant data * @inverter_mask: inverter status for all channels - one bit per channel * @disabled_mask: disabled status for all channels - one bit per channel @@ -80,7 +79,6 @@ struct samsung_pwm_channel { * @channel: per channel driver data */ struct samsung_pwm_chip { - struct pwm_chip chip; struct samsung_pwm_variant variant; u8 inverter_mask; u8 disabled_mask; @@ -110,7 +108,7 @@ static DEFINE_SPINLOCK(samsung_pwm_lock); static inline struct samsung_pwm_chip *to_samsung_pwm_chip(struct pwm_chip *chip) { - return container_of(chip, struct samsung_pwm_chip, chip); + return pwmchip_get_drvdata(chip); } static inline unsigned int to_tcon_channel(unsigned int channel) @@ -181,9 +179,10 @@ static unsigned long pwm_samsung_get_tin_rate(struct samsung_pwm_chip *our_chip, return rate / (reg + 1); } -static unsigned long pwm_samsung_calc_tin(struct samsung_pwm_chip *our_chip, +static unsigned long pwm_samsung_calc_tin(struct pwm_chip *chip, unsigned int chan, unsigned long freq) { + struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip); struct samsung_pwm_variant *variant = &our_chip->variant; unsigned long rate; struct clk *clk; @@ -197,12 +196,12 @@ static unsigned long pwm_samsung_calc_tin(struct samsung_pwm_chip *our_chip, return rate; } - dev_warn(our_chip->chip.dev, + dev_warn(pwmchip_parent(chip), "tclk of PWM %d is inoperational, using tdiv\n", chan); } rate = pwm_samsung_get_tin_rate(our_chip, chan); - dev_dbg(our_chip->chip.dev, "tin parent at %lu\n", rate); + dev_dbg(pwmchip_parent(chip), "tin parent at %lu\n", rate); /* * Compare minimum PWM frequency that can be achieved with possible @@ -232,7 +231,7 @@ static int pwm_samsung_request(struct pwm_chip *chip, struct pwm_device *pwm) struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip); if (!(our_chip->variant.output_mask & BIT(pwm->hwpwm))) { - dev_warn(chip->dev, + dev_warn(pwmchip_parent(chip), "tried to request PWM channel %d without output\n", pwm->hwpwm); return -EINVAL; @@ -326,12 +325,12 @@ static int __pwm_samsung_config(struct pwm_chip *chip, struct pwm_device *pwm, period = NSEC_PER_SEC / period_ns; - dev_dbg(our_chip->chip.dev, "duty_ns=%d, period_ns=%d (%u)\n", + dev_dbg(pwmchip_parent(chip), "duty_ns=%d, period_ns=%d (%u)\n", duty_ns, period_ns, period); - tin_rate = pwm_samsung_calc_tin(our_chip, pwm->hwpwm, period); + tin_rate = pwm_samsung_calc_tin(chip, pwm->hwpwm, period); - dev_dbg(our_chip->chip.dev, "tin_rate=%lu\n", tin_rate); + dev_dbg(pwmchip_parent(chip), "tin_rate=%lu\n", tin_rate); tin_ns = NSEC_PER_SEC / tin_rate; tcnt = period_ns / tin_ns; @@ -355,8 +354,7 @@ static int __pwm_samsung_config(struct pwm_chip *chip, struct pwm_device *pwm, /* -1UL will give 100% duty. */ --tcmp; - dev_dbg(our_chip->chip.dev, - "tin_ns=%u, tcmp=%u/%u\n", tin_ns, tcmp, tcnt); + dev_dbg(pwmchip_parent(chip), "tin_ns=%u, tcmp=%u/%u\n", tin_ns, tcmp, tcnt); /* Update PWM registers. */ writel(tcnt, our_chip->base + REG_TCNTB(pwm->hwpwm)); @@ -368,7 +366,7 @@ static int __pwm_samsung_config(struct pwm_chip *chip, struct pwm_device *pwm, * shortly afer this update (before it autoreloaded the new values). */ if (oldtcmp == (u32) -1) { - dev_dbg(our_chip->chip.dev, "Forcing manual update"); + dev_dbg(pwmchip_parent(chip), "Forcing manual update"); pwm_samsung_manual_update(our_chip, pwm); } @@ -507,9 +505,10 @@ static const struct of_device_id samsung_pwm_matches[] = { }; MODULE_DEVICE_TABLE(of, samsung_pwm_matches); -static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip) +static int pwm_samsung_parse_dt(struct pwm_chip *chip) { - struct device_node *np = our_chip->chip.dev->of_node; + struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip); + struct device_node *np = pwmchip_parent(chip)->of_node; const struct of_device_id *match; struct property *prop; const __be32 *cur; @@ -523,7 +522,7 @@ static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip) of_property_for_each_u32(np, "samsung,pwm-outputs", prop, cur, val) { if (val >= SAMSUNG_PWM_NUM) { - dev_err(our_chip->chip.dev, + dev_err(pwmchip_parent(chip), "%s: invalid channel index in samsung,pwm-outputs property\n", __func__); continue; @@ -534,7 +533,7 @@ static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip) return 0; } #else -static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip) +static int pwm_samsung_parse_dt(struct pwm_chip *chip) { return -ENODEV; } @@ -544,27 +543,26 @@ static int pwm_samsung_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct samsung_pwm_chip *our_chip; + struct pwm_chip *chip; unsigned int chan; int ret; - our_chip = devm_kzalloc(&pdev->dev, sizeof(*our_chip), GFP_KERNEL); - if (our_chip == NULL) - return -ENOMEM; + chip = devm_pwmchip_alloc(&pdev->dev, SAMSUNG_PWM_NUM, sizeof(*our_chip)); + if (IS_ERR(chip)) + return PTR_ERR(chip); + our_chip = to_samsung_pwm_chip(chip); - our_chip->chip.dev = &pdev->dev; - our_chip->chip.ops = &pwm_samsung_ops; - our_chip->chip.npwm = SAMSUNG_PWM_NUM; + chip->ops = &pwm_samsung_ops; our_chip->inverter_mask = BIT(SAMSUNG_PWM_NUM) - 1; if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { - ret = pwm_samsung_parse_dt(our_chip); + ret = pwm_samsung_parse_dt(chip); if (ret) return ret; } else { - if (!pdev->dev.platform_data) { - dev_err(&pdev->dev, "no platform data specified\n"); - return -EINVAL; - } + if (!pdev->dev.platform_data) + return dev_err_probe(&pdev->dev, -EINVAL, + "no platform data specified\n"); memcpy(&our_chip->variant, pdev->dev.platform_data, sizeof(our_chip->variant)); @@ -574,17 +572,10 @@ static int pwm_samsung_probe(struct platform_device *pdev) if (IS_ERR(our_chip->base)) return PTR_ERR(our_chip->base); - our_chip->base_clk = devm_clk_get(&pdev->dev, "timers"); - if (IS_ERR(our_chip->base_clk)) { - dev_err(dev, "failed to get timer base clk\n"); - return PTR_ERR(our_chip->base_clk); - } - - ret = clk_prepare_enable(our_chip->base_clk); - if (ret < 0) { - dev_err(dev, "failed to enable base clock\n"); - return ret; - } + our_chip->base_clk = devm_clk_get_enabled(&pdev->dev, "timers"); + if (IS_ERR(our_chip->base_clk)) + return dev_err_probe(dev, PTR_ERR(our_chip->base_clk), + "failed to get timer base clk\n"); for (chan = 0; chan < SAMSUNG_PWM_NUM; ++chan) if (our_chip->variant.output_mask & BIT(chan)) @@ -594,14 +585,11 @@ static int pwm_samsung_probe(struct platform_device *pdev) our_chip->tclk0 = devm_clk_get(&pdev->dev, "pwm-tclk0"); our_chip->tclk1 = devm_clk_get(&pdev->dev, "pwm-tclk1"); - platform_set_drvdata(pdev, our_chip); + platform_set_drvdata(pdev, chip); - ret = pwmchip_add(&our_chip->chip); - if (ret < 0) { - dev_err(dev, "failed to register PWM chip\n"); - clk_disable_unprepare(our_chip->base_clk); - return ret; - } + ret = devm_pwmchip_add(&pdev->dev, chip); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to register PWM chip\n"); dev_dbg(dev, "base_clk at %lu, tclk0 at %lu, tclk1 at %lu\n", clk_get_rate(our_chip->base_clk), @@ -611,19 +599,10 @@ static int pwm_samsung_probe(struct platform_device *pdev) return 0; } -static void pwm_samsung_remove(struct platform_device *pdev) -{ - struct samsung_pwm_chip *our_chip = platform_get_drvdata(pdev); - - pwmchip_remove(&our_chip->chip); - - clk_disable_unprepare(our_chip->base_clk); -} - static int pwm_samsung_resume(struct device *dev) { - struct samsung_pwm_chip *our_chip = dev_get_drvdata(dev); - struct pwm_chip *chip = &our_chip->chip; + struct pwm_chip *chip = dev_get_drvdata(dev); + struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip); unsigned int i; for (i = 0; i < SAMSUNG_PWM_NUM; i++) { @@ -662,7 +641,6 @@ static struct platform_driver pwm_samsung_driver = { .of_match_table = of_match_ptr(samsung_pwm_matches), }, .probe = pwm_samsung_probe, - .remove_new = pwm_samsung_remove, }; module_platform_driver(pwm_samsung_driver); |