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Message-Id: <6c45d5257ba11485719d3cb3a795ccb6ca1670d5.1453965717.git.viresh.kumar@linaro.org>
Date: Thu, 28 Jan 2016 13:50:45 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Rafael Wysocki <rjw@...ysocki.net>
Cc: linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org,
Stephen Boyd <sboyd@...eaurora.org>, nm@...com,
Viresh Kumar <viresh.kumar@...aro.org>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH V2 16/16] cpufreq: dt: No need to allocate resources anymore
OPP layer manages it now and cpufreq-dt driver doesn't need it. But, we
still need to check for availability of resources for deferred probing.
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
drivers/cpufreq/cpufreq-dt.c | 94 ++++++++++++--------------------------------
1 file changed, 26 insertions(+), 68 deletions(-)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 5ea41518df63..82d23288c70f 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -31,7 +31,6 @@
struct private_data {
struct device *cpu_dev;
- struct regulator *cpu_reg;
struct thermal_cooling_device *cdev;
const char *reg_name;
};
@@ -93,70 +92,36 @@ static const char *find_supply_name(struct device *dev)
return NULL;
}
-static int allocate_resources(int cpu, struct device **cdev,
- struct regulator **creg, struct clk **cclk)
+static int resources_available(void)
{
struct device *cpu_dev;
- struct regulator *cpu_reg;
struct clk *cpu_clk;
int ret = 0;
- char *reg_cpu0 = "cpu0", *reg_cpu = "cpu", *reg;
+ const char *name;
- cpu_dev = get_cpu_device(cpu);
+ cpu_dev = get_cpu_device(0);
if (!cpu_dev) {
- pr_err("failed to get cpu%d device\n", cpu);
+ pr_err("failed to get cpu0 device\n");
return -ENODEV;
}
- /* Try "cpu0" for older DTs */
- if (!cpu)
- reg = reg_cpu0;
- else
- reg = reg_cpu;
-
-try_again:
- cpu_reg = regulator_get_optional(cpu_dev, reg);
- ret = PTR_ERR_OR_ZERO(cpu_reg);
- if (ret) {
- /*
- * If cpu's regulator supply node is present, but regulator is
- * not yet registered, we should try defering probe.
- */
- if (ret == -EPROBE_DEFER) {
- dev_dbg(cpu_dev, "cpu%d regulator not ready, retry\n",
- cpu);
- return ret;
- }
-
- /* Try with "cpu-supply" */
- if (reg == reg_cpu0) {
- reg = reg_cpu;
- goto try_again;
- }
-
- dev_dbg(cpu_dev, "no regulator for cpu%d: %d\n", cpu, ret);
- }
+ name = find_supply_name(cpu_dev);
+ if (IS_ERR(name))
+ return PTR_ERR(name);
cpu_clk = clk_get(cpu_dev, NULL);
ret = PTR_ERR_OR_ZERO(cpu_clk);
if (ret) {
- /* put regulator */
- if (!IS_ERR(cpu_reg))
- regulator_put(cpu_reg);
-
/*
* If cpu's clk node is present, but clock is not yet
* registered, we should try defering probe.
*/
if (ret == -EPROBE_DEFER)
- dev_dbg(cpu_dev, "cpu%d clock not ready, retry\n", cpu);
+ dev_dbg(cpu_dev, "clock not ready, retry\n");
else
- dev_err(cpu_dev, "failed to get cpu%d clock: %d\n", cpu,
- ret);
+ dev_err(cpu_dev, "failed to get clock: %d\n", ret);
} else {
- *cdev = cpu_dev;
- *creg = cpu_reg;
- *cclk = cpu_clk;
+ clk_put(cpu_clk);
}
return ret;
@@ -167,7 +132,6 @@ static int cpufreq_init(struct cpufreq_policy *policy)
struct cpufreq_frequency_table *freq_table;
struct private_data *priv;
struct device *cpu_dev;
- struct regulator *cpu_reg;
struct clk *cpu_clk;
struct dev_pm_opp *suspend_opp;
unsigned int transition_latency;
@@ -175,9 +139,16 @@ static int cpufreq_init(struct cpufreq_policy *policy)
const char *name = NULL;
int ret;
- ret = allocate_resources(policy->cpu, &cpu_dev, &cpu_reg, &cpu_clk);
- if (ret) {
- pr_err("%s: Failed to allocate resources: %d\n", __func__, ret);
+ cpu_dev = get_cpu_device(policy->cpu);
+ if (!cpu_dev) {
+ pr_err("failed to get cpu%d device\n", policy->cpu);
+ return -ENODEV;
+ }
+
+ cpu_clk = clk_get(cpu_dev, NULL);
+ if (IS_ERR(cpu_clk)) {
+ ret = PTR_ERR(cpu_clk);
+ dev_err(cpu_dev, "%s: failed to get clk: %d\n", __func__, ret);
return ret;
}
@@ -191,7 +162,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
if (ret == -ENOENT)
opp_v1 = true;
else
- goto out_put_reg_clk;
+ goto out_put_clk;
}
/*
@@ -201,7 +172,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
name = find_supply_name(cpu_dev);
if (IS_ERR(name)) {
ret = PTR_ERR(name);
- goto out_put_reg_clk;
+ goto out_put_clk;
}
if (name) {
@@ -209,7 +180,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
if (ret) {
dev_err(cpu_dev, "Failed to set regulator for cpu%d: %d\n",
policy->cpu, ret);
- goto out_put_reg_clk;
+ goto out_put_clk;
}
}
@@ -267,9 +238,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
}
priv->cpu_dev = cpu_dev;
- priv->cpu_reg = cpu_reg;
policy->driver_data = priv;
-
policy->clk = cpu_clk;
rcu_read_lock();
@@ -310,10 +279,8 @@ static int cpufreq_init(struct cpufreq_policy *policy)
dev_pm_opp_of_cpumask_remove_table(policy->cpus);
if (name)
dev_pm_opp_put_regulator(cpu_dev);
-out_put_reg_clk:
+out_put_clk:
clk_put(cpu_clk);
- if (!IS_ERR(cpu_reg))
- regulator_put(cpu_reg);
return ret;
}
@@ -329,8 +296,6 @@ static int cpufreq_exit(struct cpufreq_policy *policy)
dev_pm_opp_put_regulator(priv->cpu_dev);
clk_put(policy->clk);
- if (!IS_ERR(priv->cpu_reg))
- regulator_put(priv->cpu_reg);
kfree(priv);
return 0;
@@ -383,9 +348,6 @@ static struct cpufreq_driver dt_cpufreq_driver = {
static int dt_cpufreq_probe(struct platform_device *pdev)
{
- struct device *cpu_dev;
- struct regulator *cpu_reg;
- struct clk *cpu_clk;
int ret;
/*
@@ -395,19 +357,15 @@ static int dt_cpufreq_probe(struct platform_device *pdev)
*
* FIXME: Is checking this only for CPU0 sufficient ?
*/
- ret = allocate_resources(0, &cpu_dev, &cpu_reg, &cpu_clk);
+ ret = resources_available();
if (ret)
return ret;
- clk_put(cpu_clk);
- if (!IS_ERR(cpu_reg))
- regulator_put(cpu_reg);
-
dt_cpufreq_driver.driver_data = dev_get_platdata(&pdev->dev);
ret = cpufreq_register_driver(&dt_cpufreq_driver);
if (ret)
- dev_err(cpu_dev, "failed register driver: %d\n", ret);
+ dev_err(&pdev->dev, "failed register driver: %d\n", ret);
return ret;
}
--
2.7.0.79.gdc08a19
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