gpio: syscon: reduce message level when direction reg offset not in dt

From: Grygorii Strashko <grygorii.strashko@linaro.org>

Now GPIO syscon driver produces bunch of warnings during the
boot of Kesytone 2 SoCs:
 gpio-syscon soc:keystone_dsp_gpio@02620240: can't read the dir register offset!
 gpio-syscon soc:keystone_dsp_gpio@2620244: can't read the dir register offset!

This message unintentionally was added using dev_err(), but its
actual log level is debug, because third cell of "ti,syscon-dev" is
optional.

Hence change it to dev_dbg() as it should be.

This patch fixes commit:
 5a3e3f8 ("gpio: syscon: retriave syscon node and regs offsets from dt")

Reported-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
---
 drivers/gpio/gpio-syscon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

On 03/24/2015 02:42 PM, grygorii.strashko@linaro.org wrote:
> From: Grygorii Strashko<grygorii.strashko@linaro.org>
>
> Now GPIO syscon driver produces bunch of warnings during the
> boot of Kesytone 2 SoCs:
>   gpio-syscon soc:keystone_dsp_gpio@02620240: can't read the dir register offset!
>   gpio-syscon soc:keystone_dsp_gpio@2620244: can't read the dir register offset!
>
> This message unintentionally was added using dev_err(), but its
> actual log level is debug, because third cell of "ti,syscon-dev" is
> optional.
>
> Hence change it to dev_dbg() as it should be.
>
> This patch fixes commit:
>   5a3e3f8 ("gpio: syscon: retriave syscon node and regs offsets from dt")
>
> Reported-by: Russell King<linux@arm.linux.org.uk>
> Signed-off-by: Grygorii Strashko<grygorii.strashko@linaro.org>
> ---
>   drivers/gpio/gpio-syscon.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
> index 257e298..045a952 100644
> --- a/drivers/gpio/gpio-syscon.c
> +++ b/drivers/gpio/gpio-syscon.c
> @@ -219,7 +219,7 @@ static int syscon_gpio_probe(struct platform_device *pdev)
>   		ret = of_property_read_u32_index(np, "gpio,syscon-dev", 2,
>   						&priv->dir_reg_offset);
>   		if (ret)
> -			dev_err(dev, "can't read the dir register offset!\n");
> +			dev_dbg(dev, "can't read the dir register offset!\n");
>
>   		priv->dir_reg_offset<<= 3;
>   	}

Tested this on K2HK EVM and found the error log is not appearing any more.

Tested-by: Murali Karicheri <m-karicheri2@ti.com>

On 3/24/2015 11:42 AM, grygorii.strashko@linaro.org wrote:
> From: Grygorii Strashko <grygorii.strashko@linaro.org>
>
> Now GPIO syscon driver produces bunch of warnings during the
> boot of Kesytone 2 SoCs:
>   gpio-syscon soc:keystone_dsp_gpio@02620240: can't read the dir register offset!
>   gpio-syscon soc:keystone_dsp_gpio@2620244: can't read the dir register offset!
>
> This message unintentionally was added using dev_err(), but its
> actual log level is debug, because third cell of "ti,syscon-dev" is
> optional.
>
> Hence change it to dev_dbg() as it should be.
>
> This patch fixes commit:
>   5a3e3f8 ("gpio: syscon: retriave syscon node and regs offsets from dt")
>
> Reported-by: Russell King <linux@arm.linux.org.uk>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
> ---
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
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On Tue, Mar 24, 2015 at 7:42 PM,  <grygorii.strashko@linaro.org> wrote:

> From: Grygorii Strashko <grygorii.strashko@linaro.org>
>
> Now GPIO syscon driver produces bunch of warnings during the
> boot of Kesytone 2 SoCs:
>  gpio-syscon soc:keystone_dsp_gpio@02620240: can't read the dir register offset!
>  gpio-syscon soc:keystone_dsp_gpio@2620244: can't read the dir register offset!
>
> This message unintentionally was added using dev_err(), but its
> actual log level is debug, because third cell of "ti,syscon-dev" is
> optional.
>
> Hence change it to dev_dbg() as it should be.
>
> This patch fixes commit:
>  5a3e3f8 ("gpio: syscon: retriave syscon node and regs offsets from dt")
>
> Reported-by: Russell King <linux@arm.linux.org.uk>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>

OK sorry for missing this when asking about the strange messages.
Patch applied for fixes with these test tags and ack.

Yours,
Linus Walleij
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