[PATCH v3 3/9] amba: Keep PM domain powered during ->probe()
From: Ulf Hansson <hidden>
Date: 2014-10-13 14:02:04
Also in:
linux-pm, linux-samsung-soc
Subsystem:
arm primecell bus support, the rest · Maintainers:
Russell King, Linus Torvalds
To sucessfully probe some devices their corresponding PM domains may need to be powered. Use the dev_pm_domain_get|put() APIs, to control the behavior of the PM domain. Signed-off-by: Ulf Hansson <redacted> --- drivers/amba/bus.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 47bbdc1..a8a8e13 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c@@ -187,8 +187,15 @@ static int amba_probe(struct device *dev) if (ret == -EPROBE_DEFER) break; + ret = dev_pm_domain_get(dev->pm_domain); + if (ret) { + dev_pm_domain_detach(dev, true); + break; + } + ret = amba_get_enable_pclk(pcdev); if (ret) { + dev_pm_domain_put(dev->pm_domain); dev_pm_domain_detach(dev, true); break; }
@@ -198,6 +205,7 @@ static int amba_probe(struct device *dev) pm_runtime_enable(dev); ret = pcdrv->probe(pcdev, id); + dev_pm_domain_put(dev->pm_domain); if (ret == 0) break;
--
1.9.1