From: Lukasz Majewski <l.majewski@samsung.com>
To: Eduardo Valentin <edubezval@gmail.com>, Zhang Rui <rui.zhang@intel.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
        Linux PM list <linux-pm@vger.kernel.org>,
        Vincenzo Frascino <vincenzo.frascino@st.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Lukasz Majewski <l.majewski@majess.pl>,
        Nobuhiro Iwamatsu <iwamatsu@nigauri.org>,
        Mikko Perttunen <mperttunen@nvidia.com>,
        Stephen Warren <swarren@wwwdotorg.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Alexandre Courbot <gnurou@gmail.com>, linux-tegra@vger.kernel.org,
        linux-kernel@vger.kernel.org, Lukasz Majewski <l.majewski@samsung.com>
Subject: [PATCH 1/8] thermal:cpu cooling:armada: Provide deferred probing for
 armada driver
Date: Thu, 13 Nov 2014 18:02:38 +0100
Message-id: <1415898165-27406-2-git-send-email-l.majewski@samsung.com>
In-reply-to: <1415898165-27406-1-git-send-email-l.majewski@samsung.com>
References: <1411547232-21493-1-git-send-email-l.majewski@samsung.com>
 <1415898165-27406-1-git-send-email-l.majewski@samsung.com>
Sender: linux-kernel-owner@vger.kernel.org

When CPU freq is used as a thermal zone cooling device, one needs to wait
until cpufreq subsystem is properly initialized.

This code is similar to the one already available in imx_thermal.c file.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
---
 drivers/thermal/armada_thermal.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 9d1420a..1b5d15d 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -23,6 +23,7 @@
 #include <linux/platform_device.h>
 #include <linux/of_device.h>
 #include <linux/thermal.h>
+#include <linux/cpufreq.h>
 
 #define THERMAL_VALID_MASK		0x1
 
@@ -280,6 +281,12 @@ static int armada_thermal_probe(struct platform_device *pdev)
 	struct armada_thermal_priv *priv;
 	struct resource *res;
 
+#ifdef CONFIG_CPU_THERMAL
+	if (!cpufreq_get_current_driver()) {
+		dev_dbg(&pdev->dev, "no cpufreq driver!");
+		return -EPROBE_DEFER;
+	}
+#endif
 	match = of_match_device(armada_thermal_id_table, &pdev->dev);
 	if (!match)
 		return -ENODEV;
-- 
2.0.0.rc2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/