linux-kernel - [PATCH v6 3/7] ARM: shmobile: R-Mobile: Enable module clocks if !CONFIG_PM

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Date:	Wed,  3 Dec 2014 14:41:43 +0100
From:	Geert Uytterhoeven <geert+renesas@...der.be>
To:	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Kevin Hilman <khilman@...aro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Philipp Zabel <philipp.zabel@...il.com>,
	Tomasz Figa <tomasz.figa@...il.com>, linux-sh@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v6 3/7] ARM: shmobile: R-Mobile: Enable module clocks if !CONFIG_PM_RUNTIME

If CONFIG_PM_RUNTIME is not set, the clocks must be enabled before the
devices can be used.

Currently these clocks are enabled by the !CONFIG_PM_RUNTIME version of
pm_clk_notify, activated by the hack in drivers/sh/pm_runtime.c, but
this will go away soon (at least for DT).

On detach, disabling the clocks is already handled by pm_clk_destroy().
On system suspend/resume, disabling/enabling clocks is already handled
from the genpd->dev_ops.{start,stop}() callbacks.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
v6:
  - No changes,
v5:
  - No changes,
v4:
  - New.
---
 arch/arm/mach-shmobile/pm-rmobile.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/mach-shmobile/pm-rmobile.c b/arch/arm/mach-shmobile/pm-rmobile.c
index 168046c355fc8368..6d912ce801aa88bd 100644
--- a/arch/arm/mach-shmobile/pm-rmobile.c
+++ b/arch/arm/mach-shmobile/pm-rmobile.c
@@ -118,6 +118,14 @@ static int rmobile_pd_attach_dev(struct generic_pm_domain *domain,
 		goto fail;
 	}
 
+	if (!IS_ENABLED(CONFIG_PM_RUNTIME)) {
+		error = pm_clk_resume(dev);
+		if (error) {
+			dev_err(dev, "pm_clk_resume failed %d\n", error);
+			goto fail;
+		}
+	}
+
 	return 0;
 
 fail:
-- 
1.9.1

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