On 2014/10/22 15:58, Ulf Hansson wrote:
[...]
+
+ list_for_each_entry(de, &pd->dev_list, node) {
+ i += 1;
+ pm_clk_resume(pd->dev);
Do you really need to call pm_clk_resume() number of times that there
are devices in power domain? Did you want it to be
pm_clk_resume(de->dev);
by any chance?
I was just about to ask the similar question as Dmitry did. :-)
You are right.I will modify in the next version.
Now, does that also mean you would like to assign the ->start|stop()
callbacks in the struct gpd_dev_ops to pm_clk_suspend|resume()? Or do
you intend to handle that from each driver instead?
If it can call dev_ops.start before calling power_on and power_off is
the best.But I found dev_ops.start not called.Is not I did add some patch?
+ }
+
+ /* no clk, set power domain will fail */
+ if (i == 0) {
+ pr_err("%s: failed to on/off power domain!", __func__);
+ spin_unlock_irq(&pd->dev_lock);
+ return ret;
+ }
Instead of counting I'd do
if (list_empty(&pd->dev_list)) {
pr_waen("%s: no devices in power domain\n", __func__);
goto out;
}
in the beginning of the function.
This is a good idea.
+
+ ret = rockchip_pmu_set_power_domain(pd, power_on);
+
+ list_for_each_entry(de, &pd->dev_list, node) {
+ pm_clk_suspend(pd->dev);
Same here?
+ }
+
+ spin_unlock_irq(&pd->dev_lock);
+
+ return ret;
+}
+
+static int rockchip_pd_power_on(struct generic_pm_domain *domain)
+{
+ struct rockchip_domain *pd = to_rockchip_pd(domain);
+
+ return rockchip_pd_power(pd, true);
+}
+
+static int rockchip_pd_power_off(struct generic_pm_domain *domain)
+{
+ struct rockchip_domain *pd = to_rockchip_pd(domain);
+
+ return rockchip_pd_power(pd, false);
+}
+
+void rockchip_pm_domain_attach_dev(struct device *dev)
+{
+ int ret;
+ int i = 0;
+ struct clk *clk;
+ struct rockchip_domain *pd;
+ struct rockchip_dev_entry *de;
+
+ pd = (struct rockchip_domain *)dev->pm_domain;
+ ret = pm_clk_create(dev);
+ if (ret) {
+ dev_err(dev, "pm_clk_create failed %d\n", ret);
+ return;
+ };
Stray semicolon.
+
+ while ((clk = of_clk_get(dev->of_node, i++)) && !IS_ERR(clk)) {
+ ret = pm_clk_add_clk(dev, clk);
+ if (ret) {
+ dev_err(dev, "pm_clk_add_clk failed %d\n", ret);
+ goto clk_err;
+ };
+ }
+
+ de = devm_kcalloc(pd->dev, 1,
+ sizeof(struct rockchip_dev_entry *), GFP_KERNEL);
Why devm_calloc for a single element and not devm_kzalloc? Also, I am a
bit concerned about using devm_* API here. They are better reserved fir
driver's ->probe() paths whereas we are called from
dev_pm_domain_attach() which is more general API (yes, currently it is
used by buses probing code, but that might change in the future).
Using the devm_*API is supposed to work from here. I have kept this in
mind, while we added the new dev_pm_domain_attach|detach() API. The
buses also handles -EPROBE_DEFER.
Now, I just realized that while Geert added attach|detach_dev()
callbacks for the generic PM domain, those are both "void" callbacks.
It means the deferred probe error handling is broken for these
callbacks. We should convert the attach_dev() callback into an int, I
will cook a patch immediately.
Also, where is OOM error handling?
Ok,I will change the use devm_kzalloc.
Register to pm domain devices, the number is not a lot.
[...]
Kind regards
Uffe
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