[PATCH 0/1] meson-saradc: fix internal clock names

[PATCH 0/1] meson-saradc: fix internal clock names

[Martin Blumenstingl]

This fixes the internal clock names which (prior to this change)
contained slashes. That breaks the debugfs structure for these clocks
in /sys/kernel/debug/clk.

The idea for this fix is shamelessly taken from commit b96e9eb62841c5
("pwm: meson: Fix mux clock names").

NOTE: This is meant to be applied on top of "iio: adc: meson-saradc:
check for devm_kasprintf failure" from [0]


[0] https://patchwork.kernel.org/patch/10693631/


Martin Blumenstingl (1):
  iio: adc: meson-saradc: fix internal clock names

 drivers/iio/adc/meson_saradc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

-- 
2.19.1

[PATCH 1/1] iio: adc: meson-saradc: fix internal clock names

[Martin Blumenstingl]

Before this patch we are registering the internal clocks (for example on
Meson8b, where the SAR ADC IP block implements the divider and gate
clocks) with the following names:
- /soc/cbus@c1100000/adc@8680#adc_div
- /soc/cbus@c1100000/adc@8680#adc_en

This is bad because the common clock framework uses the clock to create
a directory in <debugfs>/clk. With such name, the directory creation
(silently) fails and the debugfs entry ends up being created at the
debugfs root.

With this change, the new clock names are:
- c1108680.adc#adc_div
- c1108680.adc#adc_en

This matches the clock naming scheme used in the PWM, Ethernet and MMC
drivers. It also fixes the problem with debugfs.
The idea is shamelessly taken from commit b96e9eb62841c5 ("pwm: meson:
Fix mux clock names").

Fixes: 3921db46a8c5bc ("iio: Convert to using %pOF instead of full_name")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/iio/adc/meson_saradc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 6155d26091eb..729becb2d3d9 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -656,8 +656,8 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	struct clk_init_data init;
 	const char *clk_parents[1];
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%pOF#adc_div",
-				   indio_dev->dev.of_node);
+	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_div",
+				   dev_name(indio_dev->dev.parent));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -678,8 +678,8 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	if (WARN_ON(IS_ERR(priv->adc_div_clk)))
 		return PTR_ERR(priv->adc_div_clk);
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%pOF#adc_en",
-				   indio_dev->dev.of_node);
+	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_en",
+				   dev_name(indio_dev->dev.parent));
 	if (!init.name)
 		return -ENOMEM;
 
-- 
2.19.1

Re: [PATCH 1/1] iio: adc: meson-saradc: fix internal clock names

[Jonathan Cameron]

On Thu, 22 Nov 2018 23:01:11 +0100
Martin Blumenstingl <martin.blumenstingl@googlemail.com> wrote:

> Before this patch we are registering the internal clocks (for example on
> Meson8b, where the SAR ADC IP block implements the divider and gate
> clocks) with the following names:
> - /soc/cbus@c1100000/adc@8680#adc_div
> - /soc/cbus@c1100000/adc@8680#adc_en
> 
> This is bad because the common clock framework uses the clock to create
> a directory in <debugfs>/clk. With such name, the directory creation
> (silently) fails and the debugfs entry ends up being created at the
> debugfs root.
> 
> With this change, the new clock names are:
> - c1108680.adc#adc_div
> - c1108680.adc#adc_en
> 
> This matches the clock naming scheme used in the PWM, Ethernet and MMC
> drivers. It also fixes the problem with debugfs.
> The idea is shamelessly taken from commit b96e9eb62841c5 ("pwm: meson:
> Fix mux clock names").
> 
> Fixes: 3921db46a8c5bc ("iio: Convert to using %pOF instead of full_name")
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
As this is debugfs I am not going to push this through the fast path.

Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

Thanks,

Jonathan

> ---
>  drivers/iio/adc/meson_saradc.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> index 6155d26091eb..729becb2d3d9 100644
> --- a/drivers/iio/adc/meson_saradc.c
> +++ b/drivers/iio/adc/meson_saradc.c
> @@ -656,8 +656,8 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
>  	struct clk_init_data init;
>  	const char *clk_parents[1];
>  
> -	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%pOF#adc_div",
> -				   indio_dev->dev.of_node);
> +	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_div",
> +				   dev_name(indio_dev->dev.parent));
>  	if (!init.name)
>  		return -ENOMEM;
>  
> @@ -678,8 +678,8 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
>  	if (WARN_ON(IS_ERR(priv->adc_div_clk)))
>  		return PTR_ERR(priv->adc_div_clk);
>  
> -	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%pOF#adc_en",
> -				   indio_dev->dev.of_node);
> +	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_en",
> +				   dev_name(indio_dev->dev.parent));
>  	if (!init.name)
>  		return -ENOMEM;
>