[PATCH V1 1/5] cpufreq: Loongson1: Rename the file to loongson1-cpufreq.c

[PATCH V1 1/5] cpufreq: Loongson1: Rename the file to loongson1-cpufreq.c

[Keguang Zhang]

From: Kelvin Cheung <keguang.zhang@gmail.com>

This patch renames the file to loongson1-cpufreq.c,
and also includes some minor updates.

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>

---
V1:
   Merge the minor updates into this patch.
---
 drivers/cpufreq/Makefile                                |  2 +-
 drivers/cpufreq/{ls1x-cpufreq.c => loongson1-cpufreq.c} | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)
 rename drivers/cpufreq/{ls1x-cpufreq.c => loongson1-cpufreq.c} (96%)

diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 9e63fb1..bebe9c8 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -100,7 +100,7 @@ obj-$(CONFIG_CRIS_MACH_ARTPEC3)		+= cris-artpec3-cpufreq.o
 obj-$(CONFIG_ETRAXFS)			+= cris-etraxfs-cpufreq.o
 obj-$(CONFIG_IA64_ACPI_CPUFREQ)		+= ia64-acpi-cpufreq.o
 obj-$(CONFIG_LOONGSON2_CPUFREQ)		+= loongson2_cpufreq.o
-obj-$(CONFIG_LOONGSON1_CPUFREQ)		+= ls1x-cpufreq.o
+obj-$(CONFIG_LOONGSON1_CPUFREQ)		+= loongson1-cpufreq.o
 obj-$(CONFIG_SH_CPU_FREQ)		+= sh-cpufreq.o
 obj-$(CONFIG_SPARC_US2E_CPUFREQ)	+= sparc-us2e-cpufreq.o
 obj-$(CONFIG_SPARC_US3_CPUFREQ)		+= sparc-us3-cpufreq.o
diff --git a/drivers/cpufreq/ls1x-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c
similarity index 96%
rename from drivers/cpufreq/ls1x-cpufreq.c
rename to drivers/cpufreq/loongson1-cpufreq.c
index 262581b..57fae9b 100644
--- a/drivers/cpufreq/ls1x-cpufreq.c
+++ b/drivers/cpufreq/loongson1-cpufreq.c
@@ -1,7 +1,7 @@
 /*
  * CPU Frequency Scaling for Loongson 1 SoC
  *
- * Copyright (C) 2014 Zhang, Keguang <keguang.zhang@gmail.com>
+ * Copyright (C) 2014-2016 Zhang, Keguang <keguang.zhang@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
@@ -208,15 +208,15 @@ out:
 }
 
 static struct platform_driver ls1x_cpufreq_platdrv = {
-	.driver = {
+	.probe	= ls1x_cpufreq_probe,
+	.remove	= ls1x_cpufreq_remove,
+	.driver	= {
 		.name	= "ls1x-cpufreq",
 	},
-	.probe		= ls1x_cpufreq_probe,
-	.remove		= ls1x_cpufreq_remove,
 };
 
 module_platform_driver(ls1x_cpufreq_platdrv);
 
 MODULE_AUTHOR("Kelvin Cheung <keguang.zhang@gmail.com>");
-MODULE_DESCRIPTION("Loongson 1 CPUFreq driver");
+MODULE_DESCRIPTION("Loongson1 CPUFreq driver");
 MODULE_LICENSE("GPL");
-- 
1.9.1

[PATCH V1 2/5] cpufreq: Loongson1: Replace kzalloc() with kcalloc()

[Keguang Zhang]

From: Kelvin Cheung <keguang.zhang@gmail.com>

This patch replaces kzalloc() with kcalloc() when allocating
frequency table, and remove unnecessary 'out of memory' message.

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
---
 drivers/cpufreq/loongson1-cpufreq.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c
index 57fae9b..4c3087f 100644
--- a/drivers/cpufreq/loongson1-cpufreq.c
+++ b/drivers/cpufreq/loongson1-cpufreq.c
@@ -81,13 +81,9 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
 	pll_freq = clk_get_rate(ls1x_cpufreq.pll_clk) / 1000;
 
 	steps = 1 << DIV_CPU_WIDTH;
-	freq_tbl = kzalloc(sizeof(*freq_tbl) * steps, GFP_KERNEL);
-	if (!freq_tbl) {
-		dev_err(ls1x_cpufreq.dev,
-			"failed to alloc cpufreq_frequency_table\n");
-		ret = -ENOMEM;
-		goto out;
-	}
+	freq_tbl = kcalloc(steps, sizeof(*freq_tbl), GFP_KERNEL);
+	if (!freq_tbl)
+		return -ENOMEM;
 
 	for (i = 0; i < (steps - 1); i++) {
 		freq = pll_freq / (i + 1);
@@ -106,7 +102,7 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
 	ret = cpufreq_generic_init(policy, freq_tbl, 0);
 	if (ret)
 		kfree(freq_tbl);
-out:
+
 	return ret;
 }
 
-- 
1.9.1

[PATCH V1 3/5] cpufreq: Loongson1: Use dev_get_platdata() to get platform_data

[Keguang Zhang]

From: Kelvin Cheung <keguang.zhang@gmail.com>

This patch uses dev_get_platdata() to get the platform_data
instead of referencing it directly.

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
---
 drivers/cpufreq/loongson1-cpufreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c
index 4c3087f..1b63b4a 100644
--- a/drivers/cpufreq/loongson1-cpufreq.c
+++ b/drivers/cpufreq/loongson1-cpufreq.c
@@ -134,7 +134,7 @@ static int ls1x_cpufreq_remove(struct platform_device *pdev)
 
 static int ls1x_cpufreq_probe(struct platform_device *pdev)
 {
-	struct plat_ls1x_cpufreq *pdata = pdev->dev.platform_data;
+	struct plat_ls1x_cpufreq *pdata = dev_get_platdata(&pdev->dev);
 	struct clk *clk;
 	int ret;
 
-- 
1.9.1

[PATCH V1 4/5] cpufreq: Loongson1: Use devm_kzalloc() instead of global structure

[Keguang Zhang]

From: Kelvin Cheung <keguang.zhang@gmail.com>

This patch uses devm_kzalloc() instead of global structure.

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
---
 drivers/cpufreq/loongson1-cpufreq.c | 63 ++++++++++++++++++++-----------------
 1 file changed, 35 insertions(+), 28 deletions(-)

diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c
index 1b63b4a..f0d0156 100644
--- a/drivers/cpufreq/loongson1-cpufreq.c
+++ b/drivers/cpufreq/loongson1-cpufreq.c
@@ -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:
-- 
1.9.1

[PATCH V1 5/5] cpufreq: Loongson1: Replace goto out with return in ls1x_cpufreq_probe()

[Keguang Zhang]

From: Kelvin Cheung <keguang.zhang@gmail.com>

This patch replaces goto out with return in ls1x_cpufreq_probe().

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>

---
V1:
   Move the minor updates into patch#1.
   Fix the brace problem in ls1x_cpufreq_probe().
---
 drivers/cpufreq/loongson1-cpufreq.c | 29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c
index f0d0156..be89416 100644
--- a/drivers/cpufreq/loongson1-cpufreq.c
+++ b/drivers/cpufreq/loongson1-cpufreq.c
@@ -141,8 +141,10 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
 	struct clk *clk;
 	int ret;
 
-	if (!pdata || !pdata->clk_name || !pdata->osc_clk_name)
+	if (!pdata || !pdata->clk_name || !pdata->osc_clk_name) {
+		dev_err(&pdev->dev, "platform data missing\n");
 		return -EINVAL;
+	}
 
 	cpufreq =
 	    devm_kzalloc(&pdev->dev, sizeof(struct ls1x_cpufreq), GFP_KERNEL);
@@ -155,8 +157,7 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "unable to get %s clock\n",
 			pdata->clk_name);
-		ret = PTR_ERR(clk);
-		goto out;
+		return PTR_ERR(clk);
 	}
 	cpufreq->clk = clk;
 
@@ -164,8 +165,7 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "unable to get parent of %s clock\n",
 			__clk_get_name(cpufreq->clk));
-		ret = PTR_ERR(clk);
-		goto out;
+		return PTR_ERR(clk);
 	}
 	cpufreq->mux_clk = clk;
 
@@ -173,8 +173,7 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
 	if (IS_ERR(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;
+		return PTR_ERR(clk);
 	}
 	cpufreq->pll_clk = clk;
 
@@ -182,8 +181,7 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "unable to get %s clock\n",
 			pdata->osc_clk_name);
-		ret = PTR_ERR(clk);
-		goto out;
+		return PTR_ERR(clk);
 	}
 	cpufreq->osc_clk = clk;
 
@@ -194,19 +192,18 @@ static int ls1x_cpufreq_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev,
 			"failed to register CPUFreq driver: %d\n", ret);
-		goto out;
+		return ret;
 	}
 
 	ret = cpufreq_register_notifier(&ls1x_cpufreq_notifier_block,
 					CPUFREQ_TRANSITION_NOTIFIER);
 
-	if (!ret)
-		goto out;
-
-	dev_err(&pdev->dev, "failed to register cpufreq notifier: %d\n", ret);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"failed to register CPUFreq notifier: %d\n",ret);
+		cpufreq_unregister_driver(&ls1x_cpufreq_driver);
+	}
 
-	cpufreq_unregister_driver(&ls1x_cpufreq_driver);
-out:
 	return ret;
 }
 
-- 
1.9.1

Re: [PATCH V1 1/5] cpufreq: Loongson1: Rename the file to loongson1-cpufreq.c

[Viresh Kumar]

On 12-04-16, 18:40, Keguang Zhang wrote:
> From: Kelvin Cheung <keguang.zhang@gmail.com>
> 
> This patch renames the file to loongson1-cpufreq.c,
> and also includes some minor updates.
> 
> Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
> 
> ---
> V1:
>    Merge the minor updates into this patch.
> ---
>  drivers/cpufreq/Makefile                                |  2 +-
>  drivers/cpufreq/{ls1x-cpufreq.c => loongson1-cpufreq.c} | 10 +++++-----
>  2 files changed, 6 insertions(+), 6 deletions(-)
>  rename drivers/cpufreq/{ls1x-cpufreq.c => loongson1-cpufreq.c} (96%)

For the entire series.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh

Re: [PATCH V1 1/5] cpufreq: Loongson1: Rename the file to loongson1-cpufreq.c

[Ralf Baechle]

On Tue, Apr 12, 2016 at 04:13:19PM +0530, Viresh Kumar wrote:

> On 12-04-16, 18:40, Keguang Zhang wrote:
> > From: Kelvin Cheung <keguang.zhang@gmail.com>
> > 
> > This patch renames the file to loongson1-cpufreq.c,
> > and also includes some minor updates.
> > 
> > Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
> > 
> > ---
> > V1:
> >    Merge the minor updates into this patch.
> > ---
> >  drivers/cpufreq/Makefile                                |  2 +-
> >  drivers/cpufreq/{ls1x-cpufreq.c => loongson1-cpufreq.c} | 10 +++++-----
> >  2 files changed, 6 insertions(+), 6 deletions(-)
> >  rename drivers/cpufreq/{ls1x-cpufreq.c => loongson1-cpufreq.c} (96%)
> 
> For the entire series.
> 
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

Thanks!  Whole series queued for 4.7.

  Ralf