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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-09-29 18:19:18 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2023-10-13 10:07:18 +0200 |
| commit | 896c450960f5b11f81eaa5822db0801b03be3e68 (patch) | |
| tree | 9c2c27abab7fbe536e7c1205f6a3b538746ca4ef /drivers/pwm | |
| parent | 9608405bdaa5876041d2a1dd388009f89643a2ea (diff) | |
| download | lwn-896c450960f5b11f81eaa5822db0801b03be3e68.tar.gz lwn-896c450960f5b11f81eaa5822db0801b03be3e68.zip | |
pwm: cros-ec: Simplify using devm_pwmchip_add() and dev_err_probe()
Using devm_pwmchip_add() allows to drop pwmchip_remove() from the remove
function which makes this function empty. Then there is no user of
drvdata left and platform_set_drvdata() can be dropped, too.
Further simplify and improve error returning using dev_err_probe().
Link: https://lore.kernel.org/r/20230929161918.2410424-12-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-cros-ec.c | 33 |
1 files changed, 8 insertions, 25 deletions
diff --git a/drivers/pwm/pwm-cros-ec.c b/drivers/pwm/pwm-cros-ec.c index 5ab84e0cb911..4fbd23e4ef69 100644 --- a/drivers/pwm/pwm-cros-ec.c +++ b/drivers/pwm/pwm-cros-ec.c @@ -265,10 +265,8 @@ static int cros_ec_pwm_probe(struct platform_device *pdev) struct pwm_chip *chip; int ret; - if (!ec) { - dev_err(dev, "no parent EC device\n"); - return -EINVAL; - } + if (!ec) + return dev_err_probe(dev, -EINVAL, "no parent EC device\n"); ec_pwm = devm_kzalloc(dev, sizeof(*ec_pwm), GFP_KERNEL); if (!ec_pwm) @@ -289,10 +287,8 @@ static int cros_ec_pwm_probe(struct platform_device *pdev) chip->npwm = CROS_EC_PWM_DT_COUNT; } else { ret = cros_ec_num_pwms(ec_pwm); - if (ret < 0) { - dev_err(dev, "Couldn't find PWMs: %d\n", ret); - return ret; - } + if (ret < 0) + return dev_err_probe(dev, ret, "Couldn't find PWMs\n"); chip->npwm = ret; } @@ -303,23 +299,11 @@ static int cros_ec_pwm_probe(struct platform_device *pdev) dev_dbg(dev, "Probed %u PWMs\n", chip->npwm); - ret = pwmchip_add(chip); - if (ret < 0) { - dev_err(dev, "cannot register PWM: %d\n", ret); - return ret; - } - - platform_set_drvdata(pdev, ec_pwm); - - return ret; -} - -static void cros_ec_pwm_remove(struct platform_device *dev) -{ - struct cros_ec_pwm_device *ec_pwm = platform_get_drvdata(dev); - struct pwm_chip *chip = &ec_pwm->chip; + ret = devm_pwmchip_add(dev, chip); + if (ret < 0) + return dev_err_probe(dev, ret, "cannot register PWM\n"); - pwmchip_remove(chip); + return 0; } #ifdef CONFIG_OF @@ -333,7 +317,6 @@ MODULE_DEVICE_TABLE(of, cros_ec_pwm_of_match); static struct platform_driver cros_ec_pwm_driver = { .probe = cros_ec_pwm_probe, - .remove_new = cros_ec_pwm_remove, .driver = { .name = "cros-ec-pwm", .of_match_table = of_match_ptr(cros_ec_pwm_of_match), |