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[209.132.180.67]) by mx.google.com with ESMTP id xk1si27527903pab.68.2014.07.01.09.34.38; Tue, 01 Jul 2014 09:34:38 -0700 (PDT) Received-SPF: none (google.com: linux-kernel-owner@vger.kernel.org does not designate permitted sender hosts) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758451AbaGAQe1 (ORCPT + 27 others); Tue, 1 Jul 2014 12:34:27 -0400 Received: from mail-pa0-f44.google.com ([209.85.220.44]:64340 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758433AbaGAQeY (ORCPT ); Tue, 1 Jul 2014 12:34:24 -0400 Received: by mail-pa0-f44.google.com with SMTP id rd3so10943699pab.3 for ; Tue, 01 Jul 2014 09:34:24 -0700 (PDT) X-Received: by 10.66.66.199 with SMTP id h7mr2033148pat.30.1404232464060; Tue, 01 Jul 2014 09:34:24 -0700 (PDT) Received: from localhost ([122.166.172.22]) by mx.google.com with ESMTPSA id qk8sm22635785pbb.24.2014.07.01.09.34.17 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Tue, 01 Jul 2014 09:34:23 -0700 (PDT) From: Viresh Kumar To: rjw@rjwysocki.net, shawn.guo@linaro.org Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, arvind.chauhan@arm.com, sboyd@codeaurora.org, linux-arm-msm@vger.kernel.org, spk.linux@gmail.com, thomas.ab@samsung.com, nm@ti.com, t.figa@samsung.com, Viresh Kumar Subject: [PATCH 06/14] cpufreq: cpu0: defer probe if clock isn't registered yet Date: Tue, 1 Jul 2014 22:02:35 +0530 Message-Id: X-Mailer: git-send-email 2.0.0.rc2 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: viresh.kumar@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.128.178 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Currently, we defer probe if regulator_get() returned -EPROBE_DEFER, i.e. regulator isn't registered yet. The same is true for clock as well, so lets defer in that case as well. Signed-off-by: Viresh Kumar --- drivers/cpufreq/cpufreq-cpu0.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c index 4273a5f..b5b8e1c 100644 --- a/drivers/cpufreq/cpufreq-cpu0.c +++ b/drivers/cpufreq/cpufreq-cpu0.c @@ -150,8 +150,17 @@ static int cpu0_cpufreq_probe(struct platform_device *pdev) cpu_clk = clk_get(cpu_dev, NULL); if (IS_ERR(cpu_clk)) { - ret = PTR_ERR(cpu_clk); - pr_err("failed to get cpu0 clock: %d\n", ret); + /* + * If cpu's clk node is present, but clock is not yet + * registered, we should try defering probe. + */ + if (PTR_ERR(cpu_clk) == -EPROBE_DEFER) { + dev_err(cpu_dev, "cpu0 clock not ready, retry\n"); + ret = -EPROBE_DEFER; + } else { + ret = PTR_ERR(cpu_clk); + dev_err(cpu_dev, "failed to get cpu0 clock: %d\n", ret); + } goto out_put_reg; }