From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lukasz Majewski Subject: [PATCH 2/8] thermal:cpu cooling:kirkwood: Provide deferred probing for kirkwood driver Date: Thu, 13 Nov 2014 18:02:39 +0100 Message-ID: <1415898165-27406-3-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> Return-path: In-reply-to: <1415898165-27406-1-git-send-email-l.majewski@samsung.com> Sender: linux-kernel-owner@vger.kernel.org To: Eduardo Valentin , Zhang Rui Cc: Ezequiel Garcia , Kuninori Morimoto , Linux PM list , Vincenzo Frascino , Bartlomiej Zolnierkiewicz , Lukasz Majewski , Nobuhiro Iwamatsu , Mikko Perttunen , Stephen Warren , Thierry Reding , Alexandre Courbot , linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Lukasz Majewski List-Id: linux-tegra@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 --- drivers/thermal/kirkwood_thermal.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/thermal/kirkwood_thermal.c b/drivers/thermal/kirkwood_thermal.c index 3b034a0..e938291 100644 --- a/drivers/thermal/kirkwood_thermal.c +++ b/drivers/thermal/kirkwood_thermal.c @@ -21,6 +21,7 @@ #include #include #include +#include #define KIRKWOOD_THERMAL_VALID_OFFSET 9 #define KIRKWOOD_THERMAL_VALID_MASK 0x1 @@ -75,6 +76,12 @@ static int kirkwood_thermal_probe(struct platform_device *pdev) struct kirkwood_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 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; -- 2.0.0.rc2