[v1] i2c: tegra: Compile PM functions unconditionally
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Message ID 20190707231234.11679-1-digetx@gmail.com
State New
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  • [v1] i2c: tegra: Compile PM functions unconditionally
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Commit Message

Dmitry Osipenko July 7, 2019, 11:12 p.m. UTC
The I2C driver fails to probe if CONFIG_PM_SLEEP=n because runtime PM
doesn't depend on the PM sleep and in this case the runtime PM ops are
not included in the driver, resulting in I2C clock not being enabled.
It's much cleaner to simply allow compiler to remove the dead code
instead of messing with the #ifdefs.

This patch fixes such errors when CONFIG_PM_SLEEP=n:

  tegra-i2c 7000c400.i2c: timeout waiting for fifo flush
  tegra-i2c 7000c400.i2c: Failed to initialize i2c controller

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/i2c/busses/i2c-tegra.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

Comments

Jon Hunter July 9, 2019, 10:12 a.m. UTC | #1
On 08/07/2019 00:12, Dmitry Osipenko wrote:
> The I2C driver fails to probe if CONFIG_PM_SLEEP=n because runtime PM
> doesn't depend on the PM sleep and in this case the runtime PM ops are
> not included in the driver, resulting in I2C clock not being enabled.
> It's much cleaner to simply allow compiler to remove the dead code
> instead of messing with the #ifdefs.
> 
> This patch fixes such errors when CONFIG_PM_SLEEP=n:
> 
>   tegra-i2c 7000c400.i2c: timeout waiting for fifo flush
>   tegra-i2c 7000c400.i2c: Failed to initialize i2c controller
> 
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c | 16 +++++-----------
>  1 file changed, 5 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
> index 9fcb13beeb8f..18f0ceed9f1b 100644
> --- a/drivers/i2c/busses/i2c-tegra.c
> +++ b/drivers/i2c/busses/i2c-tegra.c
> @@ -636,7 +636,7 @@ static void tegra_dvc_init(struct tegra_i2c_dev *i2c_dev)
>  	dvc_writel(i2c_dev, val, DVC_CTRL_REG1);
>  }
>  
> -static int tegra_i2c_runtime_resume(struct device *dev)
> +static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev)
>  {
>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>  	int ret;
> @@ -665,7 +665,7 @@ static int tegra_i2c_runtime_resume(struct device *dev)
>  	return 0;
>  }
>  
> -static int tegra_i2c_runtime_suspend(struct device *dev)
> +static int __maybe_unused tegra_i2c_runtime_suspend(struct device *dev)
>  {
>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>  
> @@ -1711,8 +1711,7 @@ static int tegra_i2c_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
> -static int tegra_i2c_suspend(struct device *dev)
> +static int __maybe_unused tegra_i2c_suspend(struct device *dev)
>  {
>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>  
> @@ -1721,7 +1720,7 @@ static int tegra_i2c_suspend(struct device *dev)
>  	return 0;
>  }
>  
> -static int tegra_i2c_resume(struct device *dev)
> +static int __maybe_unused tegra_i2c_resume(struct device *dev)
>  {
>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>  	int err;
> @@ -1741,18 +1740,13 @@ static const struct dev_pm_ops tegra_i2c_pm = {
>  			   NULL)
>  };
>  
> -#define TEGRA_I2C_PM	(&tegra_i2c_pm)
> -#else
> -#define TEGRA_I2C_PM	NULL
> -#endif
> -
>  static struct platform_driver tegra_i2c_driver = {
>  	.probe   = tegra_i2c_probe,
>  	.remove  = tegra_i2c_remove,
>  	.driver  = {
>  		.name  = "tegra-i2c",
>  		.of_match_table = tegra_i2c_of_match,
> -		.pm    = TEGRA_I2C_PM,
> +		.pm    = &tegra_i2c_pm,
>  	},
>  };
>  

Looks good to me.

Acked-by: Jon Hunter <jonathanh@nvidia.com>

Cheers
Jon
Dmitry Osipenko July 9, 2019, 9:03 p.m. UTC | #2
09.07.2019 13:12, Jon Hunter пишет:
> 
> On 08/07/2019 00:12, Dmitry Osipenko wrote:
>> The I2C driver fails to probe if CONFIG_PM_SLEEP=n because runtime PM
>> doesn't depend on the PM sleep and in this case the runtime PM ops are
>> not included in the driver, resulting in I2C clock not being enabled.
>> It's much cleaner to simply allow compiler to remove the dead code
>> instead of messing with the #ifdefs.
>>
>> This patch fixes such errors when CONFIG_PM_SLEEP=n:
>>
>>   tegra-i2c 7000c400.i2c: timeout waiting for fifo flush
>>   tegra-i2c 7000c400.i2c: Failed to initialize i2c controller
>>
>> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
>> ---
>>  drivers/i2c/busses/i2c-tegra.c | 16 +++++-----------
>>  1 file changed, 5 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
>> index 9fcb13beeb8f..18f0ceed9f1b 100644
>> --- a/drivers/i2c/busses/i2c-tegra.c
>> +++ b/drivers/i2c/busses/i2c-tegra.c
>> @@ -636,7 +636,7 @@ static void tegra_dvc_init(struct tegra_i2c_dev *i2c_dev)
>>  	dvc_writel(i2c_dev, val, DVC_CTRL_REG1);
>>  }
>>  
>> -static int tegra_i2c_runtime_resume(struct device *dev)
>> +static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev)
>>  {
>>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>>  	int ret;
>> @@ -665,7 +665,7 @@ static int tegra_i2c_runtime_resume(struct device *dev)
>>  	return 0;
>>  }
>>  
>> -static int tegra_i2c_runtime_suspend(struct device *dev)
>> +static int __maybe_unused tegra_i2c_runtime_suspend(struct device *dev)
>>  {
>>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>>  
>> @@ -1711,8 +1711,7 @@ static int tegra_i2c_remove(struct platform_device *pdev)
>>  	return 0;
>>  }
>>  
>> -#ifdef CONFIG_PM_SLEEP
>> -static int tegra_i2c_suspend(struct device *dev)
>> +static int __maybe_unused tegra_i2c_suspend(struct device *dev)
>>  {
>>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>>  
>> @@ -1721,7 +1720,7 @@ static int tegra_i2c_suspend(struct device *dev)
>>  	return 0;
>>  }
>>  
>> -static int tegra_i2c_resume(struct device *dev)
>> +static int __maybe_unused tegra_i2c_resume(struct device *dev)
>>  {
>>  	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>>  	int err;
>> @@ -1741,18 +1740,13 @@ static const struct dev_pm_ops tegra_i2c_pm = {
>>  			   NULL)
>>  };
>>  
>> -#define TEGRA_I2C_PM	(&tegra_i2c_pm)
>> -#else
>> -#define TEGRA_I2C_PM	NULL
>> -#endif
>> -
>>  static struct platform_driver tegra_i2c_driver = {
>>  	.probe   = tegra_i2c_probe,
>>  	.remove  = tegra_i2c_remove,
>>  	.driver  = {
>>  		.name  = "tegra-i2c",
>>  		.of_match_table = tegra_i2c_of_match,
>> -		.pm    = TEGRA_I2C_PM,
>> +		.pm    = &tegra_i2c_pm,
>>  	},
>>  };
>>  
> 
> Looks good to me.
> 
> Acked-by: Jon Hunter <jonathanh@nvidia.com>

Thanks!
Wolfram Sang Aug. 1, 2019, 12:45 p.m. UTC | #3
On Mon, Jul 08, 2019 at 02:12:34AM +0300, Dmitry Osipenko wrote:
> The I2C driver fails to probe if CONFIG_PM_SLEEP=n because runtime PM
> doesn't depend on the PM sleep and in this case the runtime PM ops are
> not included in the driver, resulting in I2C clock not being enabled.
> It's much cleaner to simply allow compiler to remove the dead code
> instead of messing with the #ifdefs.
> 
> This patch fixes such errors when CONFIG_PM_SLEEP=n:
> 
>   tegra-i2c 7000c400.i2c: timeout waiting for fifo flush
>   tegra-i2c 7000c400.i2c: Failed to initialize i2c controller
> 
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>

Applied to for-next, thanks!

Patch
diff mbox series

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 9fcb13beeb8f..18f0ceed9f1b 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -636,7 +636,7 @@  static void tegra_dvc_init(struct tegra_i2c_dev *i2c_dev)
 	dvc_writel(i2c_dev, val, DVC_CTRL_REG1);
 }
 
-static int tegra_i2c_runtime_resume(struct device *dev)
+static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev)
 {
 	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 	int ret;
@@ -665,7 +665,7 @@  static int tegra_i2c_runtime_resume(struct device *dev)
 	return 0;
 }
 
-static int tegra_i2c_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra_i2c_runtime_suspend(struct device *dev)
 {
 	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 
@@ -1711,8 +1711,7 @@  static int tegra_i2c_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int tegra_i2c_suspend(struct device *dev)
+static int __maybe_unused tegra_i2c_suspend(struct device *dev)
 {
 	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 
@@ -1721,7 +1720,7 @@  static int tegra_i2c_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_i2c_resume(struct device *dev)
+static int __maybe_unused tegra_i2c_resume(struct device *dev)
 {
 	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 	int err;
@@ -1741,18 +1740,13 @@  static const struct dev_pm_ops tegra_i2c_pm = {
 			   NULL)
 };
 
-#define TEGRA_I2C_PM	(&tegra_i2c_pm)
-#else
-#define TEGRA_I2C_PM	NULL
-#endif
-
 static struct platform_driver tegra_i2c_driver = {
 	.probe   = tegra_i2c_probe,
 	.remove  = tegra_i2c_remove,
 	.driver  = {
 		.name  = "tegra-i2c",
 		.of_match_table = tegra_i2c_of_match,
-		.pm    = TEGRA_I2C_PM,
+		.pm    = &tegra_i2c_pm,
 	},
 };