[PATCHv3 4/9] cpufreq: imx6q: Use auto-registration of thermal cooling device

[Amit Kucheria]

Use the CPUFREQ_AUTO_REGISTER_COOLING_DEV flag to allow cpufreq core to
automatically register as a thermal cooling device.

This allows removal of boiler plate code from the driver.

Signed-off-by: Amit Kucheria <amit.kuche...@linaro.org>
---
 drivers/cpufreq/imx6q-cpufreq.c | 24 ++----------------------
 1 file changed, 2 insertions(+), 22 deletions(-)

diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 9fedf627e000..9935df234fa1 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -9,7 +9,6 @@
 #include <linux/clk.h>
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
-#include <linux/cpu_cooling.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/nvmem-consumer.h>
@@ -52,7 +51,6 @@ static struct clk_bulk_data clks[] = {
 };
 
 static struct device *cpu_dev;
-static struct thermal_cooling_device *cdev;
 static bool free_opp;
 static struct cpufreq_frequency_table *freq_table;
 static unsigned int max_freq;
@@ -193,16 +191,6 @@ static int imx6q_set_target(struct cpufreq_policy *policy, 
unsigned int index)
        return 0;
 }
 
-static void imx6q_cpufreq_ready(struct cpufreq_policy *policy)
-{
-       cdev = of_cpufreq_cooling_register(policy);
-
-       if (!cdev)
-               dev_err(cpu_dev,
-                       "running cpufreq without cooling device: %ld\n",
-                       PTR_ERR(cdev));
-}
-
 static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
 {
        int ret;
@@ -214,22 +202,14 @@ static int imx6q_cpufreq_init(struct cpufreq_policy 
*policy)
        return ret;
 }
 
-static int imx6q_cpufreq_exit(struct cpufreq_policy *policy)
-{
-       cpufreq_cooling_unregister(cdev);
-
-       return 0;
-}
-
 static struct cpufreq_driver imx6q_cpufreq_driver = {
-       .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK,
+       .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK |
+                CPUFREQ_AUTO_REGISTER_COOLING_DEV,
        .verify = cpufreq_generic_frequency_table_verify,
        .target_index = imx6q_set_target,
        .get = cpufreq_generic_get,
        .init = imx6q_cpufreq_init,
-       .exit = imx6q_cpufreq_exit,
        .name = "imx6q-cpufreq",
-       .ready = imx6q_cpufreq_ready,
        .attr = cpufreq_generic_attr,
        .suspend = cpufreq_generic_suspend,
 };
-- 
2.17.1