linux-kernel - [PATCH v2 09/11] cpufreq: tegra20: Check if this is Tegra20 machine

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Message-Id: <20180518200642.24815-10-digetx@gmail.com>
Date:   Fri, 18 May 2018 23:06:40 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peter Geis <pgwipeout@...il.com>
Subject: [PATCH v2 09/11] cpufreq: tegra20: Check if this is Tegra20 machine

Don't even try to request the clocks during of module initialization on
non-Tegra20 machines (this is the case for a multi-platform kernel) for
consistency.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
Acked-by: Thierry Reding <treding@...dia.com>
---
 drivers/cpufreq/tegra20-cpufreq.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/cpufreq/tegra20-cpufreq.c b/drivers/cpufreq/tegra20-cpufreq.c
index 36075aee2ff2..7b425ebe81e7 100644
--- a/drivers/cpufreq/tegra20-cpufreq.c
+++ b/drivers/cpufreq/tegra20-cpufreq.c
@@ -21,6 +21,7 @@
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/types.h>
 
 static struct cpufreq_frequency_table freq_table[] = {
@@ -158,6 +159,9 @@ static int __init tegra_cpufreq_init(void)
 {
 	int err;
 
+	if (!of_machine_is_compatible("nvidia,tegra20"))
+		return -ENODEV;
+
 	cpu_clk = clk_get_sys(NULL, "cclk");
 	if (IS_ERR(cpu_clk))
 		return PTR_ERR(cpu_clk);
-- 
2.17.0