Re: [PATCH 27/31] PM / devfreq: rk3399_dmc: convert to use devm_pm_opp_* API
From: Chanwoo Choi <hidden>
Date: 2021-01-05 04:02:25
Also in:
dri-devel, linux-arm-msm, linux-media, linux-mmc, linux-pm, linux-samsung-soc, linux-spi, linux-tegra, lkml
Hi, Do you make this patch on latest source? When I apply this patch for test, it make the merge conflict error. On Sun, Jan 3, 2021 at 12:57 PM Yangtao Li [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Use devm_pm_opp_* API to simplify code. Since devres release can guarantee the order, let's remove devm_devfreq_unregister_opp_notifier(). Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> --- drivers/devfreq/rk3399_dmc.c | 22 +++------------------- 1 file changed, 3 insertions(+), 19 deletions(-)diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c index 2e912166a993..9b8ab8be29d1 100644 --- a/drivers/devfreq/rk3399_dmc.c +++ b/drivers/devfreq/rk3399_dmc.c@@ -432,7 +432,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) * We add a devfreq driver to our parent since it has a device tree node * with operating points. */ - if (dev_pm_opp_of_add_table(dev)) { + if (devm_pm_opp_of_add_table(dev)) { dev_err(dev, "Invalid operating-points in device tree.\n"); ret = -EINVAL; goto err_edev;@@ -448,7 +448,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) opp = devfreq_recommended_opp(dev, &data->rate, 0); if (IS_ERR(opp)) { ret = PTR_ERR(opp); - goto err_free_opp; + goto err_edev; } data->rate = dev_pm_opp_get_freq(opp);@@ -463,7 +463,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) &data->ondemand_data); if (IS_ERR(data->devfreq)) { ret = PTR_ERR(data->devfreq); - goto err_free_opp; + goto err_edev; } devm_devfreq_register_opp_notifier(dev, data->devfreq);@@ -473,27 +473,12 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) return 0; -err_free_opp: - dev_pm_opp_of_remove_table(&pdev->dev); err_edev: devfreq_event_disable_edev(data->edev); return ret; } -static int rk3399_dmcfreq_remove(struct platform_device *pdev) -{ - struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(&pdev->dev); - - /* - * Before remove the opp table we need to unregister the opp notifier. - */ - devm_devfreq_unregister_opp_notifier(dmcfreq->dev, dmcfreq->devfreq); - dev_pm_opp_of_remove_table(dmcfreq->dev);
As the comment, we need to unregister the opp notifier before removing the OPP. Do you guarantee this sequence on your patch?
quoted hunk ↗ jump to hunk
- - return 0; -} - static const struct of_device_id rk3399dmc_devfreq_of_match[] = { { .compatible = "rockchip,rk3399-dmc" }, { },@@ -502,7 +487,6 @@ MODULE_DEVICE_TABLE(of, rk3399dmc_devfreq_of_match); static struct platform_driver rk3399_dmcfreq_driver = { .probe = rk3399_dmcfreq_probe, - .remove = rk3399_dmcfreq_remove, .driver = { .name = "rk3399-dmc-freq", .pm = &rk3399_dmcfreq_pm, --2.25.1
-- Best Regards, Chanwoo Choi