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CPUFREQ: Loongson1: Use devm_kzalloc() instead of global structure

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This patch uses devm_kzalloc() instead of global structure.

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13055/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Kelvin Cheung 2016-04-12 18:40:18 +08:00 committed by Ralf Baechle
parent 25581d2b76
commit 99bf2e6898
1 changed files with 35 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/cpufreq/loongson1-cpufreq.c
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@ -20,7 +20,7 @@
#include <cpufreq.h>
#include <loongson1.h>
static struct {
struct ls1x_cpufreq {
struct device *dev;
struct clk *clk; /* CPU clk */
struct clk *mux_clk; /* MUX of CPU clk */
@ -28,7 +28,9 @@ static struct {
struct clk *osc_clk; /* OSC clk */
unsigned int max_freq;
unsigned int min_freq;
} ls1x_cpufreq;
};
static struct ls1x_cpufreq *cpufreq;
static int ls1x_cpufreq_notifier(struct notifier_block *nb,
unsigned long val, void *data)
@ -46,6 +48,7 @@ static struct notifier_block ls1x_cpufreq_notifier_block = {
static int ls1x_cpufreq_target(struct cpufreq_policy *policy,
unsigned int index)
{
struct device *cpu_dev = get_cpu_device(policy->cpu);
unsigned int old_freq, new_freq;
old_freq = policy->cur;
@ -60,25 +63,26 @@ static int ls1x_cpufreq_target(struct cpufreq_policy *policy,
* - Reparent CPU clk back to CPU DIV clk
*/
dev_dbg(ls1x_cpufreq.dev, "%u KHz --> %u KHz\n", old_freq, new_freq);
clk_set_parent(policy->clk, ls1x_cpufreq.osc_clk);
clk_set_parent(policy->clk, cpufreq->osc_clk);
__raw_writel(__raw_readl(LS1X_CLK_PLL_DIV) | RST_CPU_EN | RST_CPU,
LS1X_CLK_PLL_DIV);
__raw_writel(__raw_readl(LS1X_CLK_PLL_DIV) & ~(RST_CPU_EN | RST_CPU),
LS1X_CLK_PLL_DIV);
clk_set_rate(ls1x_cpufreq.mux_clk, new_freq * 1000);
clk_set_parent(policy->clk, ls1x_cpufreq.mux_clk);
clk_set_rate(cpufreq->mux_clk, new_freq * 1000);
clk_set_parent(policy->clk, cpufreq->mux_clk);
dev_dbg(cpu_dev, "%u KHz --> %u KHz\n", old_freq, new_freq);
return 0;
}
static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
{
struct device *cpu_dev = get_cpu_device(policy->cpu);
struct cpufreq_frequency_table *freq_tbl;
unsigned int pll_freq, freq;
int steps, i, ret;
pll_freq = clk_get_rate(ls1x_cpufreq.pll_clk) / 1000;
pll_freq = clk_get_rate(cpufreq->pll_clk) / 1000;
steps = 1 << DIV_CPU_WIDTH;
freq_tbl = kcalloc(steps, sizeof(*freq_tbl), GFP_KERNEL);
@ -87,18 +91,17 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
for (i = 0; i < (steps - 1); i++) {
freq = pll_freq / (i + 1);
if ((freq < ls1x_cpufreq.min_freq) ||
(freq > ls1x_cpufreq.max_freq))
if ((freq < cpufreq->min_freq) || (freq > cpufreq->max_freq))
freq_tbl[i].frequency = CPUFREQ_ENTRY_INVALID;
else
freq_tbl[i].frequency = freq;
dev_dbg(ls1x_cpufreq.dev,
dev_dbg(cpu_dev,
"cpufreq table: index %d: frequency %d\n", i,
freq_tbl[i].frequency);
}
freq_tbl[i].frequency = CPUFREQ_TABLE_END;
policy->clk = ls1x_cpufreq.clk;
policy->clk = cpufreq->clk;
ret = cpufreq_generic_init(policy, freq_tbl, 0);
if (ret)
kfree(freq_tbl);
@ -141,51 +144,56 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
if (!pdata || !pdata->clk_name || !pdata->osc_clk_name)
return -EINVAL;
ls1x_cpufreq.dev = &pdev->dev;
cpufreq =
devm_kzalloc(&pdev->dev, sizeof(struct ls1x_cpufreq), GFP_KERNEL);
if (!cpufreq)
return -ENOMEM;
cpufreq->dev = &pdev->dev;
clk = devm_clk_get(&pdev->dev, pdata->clk_name);
if (IS_ERR(clk)) {
dev_err(ls1x_cpufreq.dev, "unable to get %s clock\n",
dev_err(&pdev->dev, "unable to get %s clock\n",
pdata->clk_name);
ret = PTR_ERR(clk);
goto out;
}
ls1x_cpufreq.clk = clk;
cpufreq->clk = clk;
clk = clk_get_parent(clk);
if (IS_ERR(clk)) {
dev_err(ls1x_cpufreq.dev, "unable to get parent of %s clock\n",
__clk_get_name(ls1x_cpufreq.clk));
dev_err(&pdev->dev, "unable to get parent of %s clock\n",
__clk_get_name(cpufreq->clk));
ret = PTR_ERR(clk);
goto out;
}
ls1x_cpufreq.mux_clk = clk;
cpufreq->mux_clk = clk;
clk = clk_get_parent(clk);
if (IS_ERR(clk)) {
dev_err(ls1x_cpufreq.dev, "unable to get parent of %s clock\n",
__clk_get_name(ls1x_cpufreq.mux_clk));
dev_err(&pdev->dev, "unable to get parent of %s clock\n",
__clk_get_name(cpufreq->mux_clk));
ret = PTR_ERR(clk);
goto out;
}
ls1x_cpufreq.pll_clk = clk;
cpufreq->pll_clk = clk;
clk = devm_clk_get(&pdev->dev, pdata->osc_clk_name);
if (IS_ERR(clk)) {
dev_err(ls1x_cpufreq.dev, "unable to get %s clock\n",
dev_err(&pdev->dev, "unable to get %s clock\n",
pdata->osc_clk_name);
ret = PTR_ERR(clk);
goto out;
}
ls1x_cpufreq.osc_clk = clk;
cpufreq->osc_clk = clk;
ls1x_cpufreq.max_freq = pdata->max_freq;
ls1x_cpufreq.min_freq = pdata->min_freq;
cpufreq->max_freq = pdata->max_freq;
cpufreq->min_freq = pdata->min_freq;
ret = cpufreq_register_driver(&ls1x_cpufreq_driver);
if (ret) {
dev_err(ls1x_cpufreq.dev,
"failed to register cpufreq driver: %d\n", ret);
dev_err(&pdev->dev,
"failed to register CPUFreq driver: %d\n", ret);
goto out;
}
@ -195,8 +203,7 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
if (!ret)
goto out;
dev_err(ls1x_cpufreq.dev, "failed to register cpufreq notifier: %d\n",
ret);
dev_err(&pdev->dev, "failed to register cpufreq notifier: %d\n", ret);
cpufreq_unregister_driver(&ls1x_cpufreq_driver);
out: