Re: [PATCH] i2c: pinctrl-ify i2c-omap.c

Porter, Matt
2012-10-30T19:13:09Z

On Oct 30, 2012, at 2:53 PM, Felipe Balbi wrote:

> Hi,
>
> On Wed, Oct 31, 2012 at 05:55:30PM +0200, Pantelis Antoniou wrote:
>> Enable pinctrl for i2c-omap.
>>
>> Signed-off-by: Pantelis Antoniou <panto-wVdstyuyKrO8r51toPun2/C9HSW9iNxf@public.gmane.org>
>> ---
>> drivers/i2c/busses/i2c-omap.c | 10 ++++++++++
>> 1 file changed, 10 insertions(+)
>>
>> diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
>> index db31eae..4c38aa0 100644
>> --- a/drivers/i2c/busses/i2c-omap.c
>> +++ b/drivers/i2c/busses/i2c-omap.c
>> @@ -44,6 +44,8 @@
>> #include <linux/i2c-omap.h>
>> #include <linux/pm_runtime.h>
>> #include <linux/pm_qos.h>
>> +#include <linux/pinctrl/consumer.h>
>> +#include <linux/err.h>
>>
>> /* I2C controller revisions */
>> #define OMAP_I2C_OMAP1_REV_2 0x20
>> @@ -1064,6 +1066,7 @@ omap_i2c_probe(struct platform_device *pdev)
>> const struct of_device_id *match;
>> int irq;
>> int r;
>> + struct pinctrl *pinctrl;
>>
>> /* NOTE: driver uses the static register mapping */
>> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> @@ -1202,6 +1205,13 @@ omap_i2c_probe(struct platform_device *pdev)
>>
>> of_i2c_register_devices(adap);
>>
>> + pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
>> + if (IS_ERR(pinctrl))
>> + dev_warn(dev->dev, "unable to select pin group\n");
>
> if we continue anyway, should this be dev_warn() ? Would you consider
> dev_dbg() instead ?

This has been the convention already in other drivers upstream. Discussed
previously in http://www.spinics.net/lists/arm-kernel/msg192856.html and
http://lkml.org/lkml/2012/9/11/369

That resulted in having dev_warn with a message of "pins are not configured
from the driver" in both leds-gpio and spi-omap2-mcspi. It seems there should
be a good reason to change reporting for the same case here.

-Matt