[PATCH] spi/pl022: Fix error print while setting bits/word on pl022

[PATCH] spi/pl022: Fix error print while setting bits/word on pl022

[Vinit Shenoy]

pl022 ssp controller supports word lengths from 4 to 16 bits.
The kernel error message says:
"a standard pl022 can only handle 1 <= n <= 16 bit words".

Fixed above range to 4 <= n <= 16.

Signed-off-by: Vinit Shenoy <vinit.shenoy-qxv4g6HH51o@public.gmane.org>
---
 drivers/spi/spi-pl022.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 09c925a..905752f 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -1848,7 +1848,7 @@ static int pl022_setup(struct spi_device *spi)
 				"illegal data size for this controller!\n");
 			dev_err(&spi->dev,
 				"a standard pl022 can only handle "
-				"1 <= n <= 16 bit words\n");
+				"4 <= n <= 16 bit words\n");
 			status = -ENOTSUPP;
 			goto err_config_params;
 		}
-- 
1.7.3.4


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Re: [PATCH] spi/pl022: Fix error print while setting bits/word on pl022

[Viresh Kumar]

On 4/17/2012 11:28 AM, Vinit Kamalaksha SHENOY wrote:
> pl022 ssp controller supports word lengths from 4 to 16 bits.
> The kernel error message says:
> "a standard pl022 can only handle 1 <= n <= 16 bit words".
> 
> Fixed above range to 4 <= n <= 16.
> 
> Signed-off-by: Vinit Shenoy <vinit.shenoy-qxv4g6HH51o@public.gmane.org>
> ---
>  drivers/spi/spi-pl022.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
> index 09c925a..905752f 100644
> --- a/drivers/spi/spi-pl022.c
> +++ b/drivers/spi/spi-pl022.c
> @@ -1848,7 +1848,7 @@ static int pl022_setup(struct spi_device *spi)
>  				"illegal data size for this controller!\n");
>  			dev_err(&spi->dev,
>  				"a standard pl022 can only handle "
> -				"1 <= n <= 16 bit words\n");
> +				"4 <= n <= 16 bit words\n");
>  			status = -ENOTSUPP;
>  			goto err_config_params;
>  		}

Reviewed-by: Viresh Kumar <viresh.kumar-qxv4g6HH51o@public.gmane.org>

--
viresh

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Re: [PATCH] spi/pl022: Fix error print while setting bits/word on pl022

[Shubhrajyoti Datta]

Hi Vinit ,
A minor comment/ suggestion.

On Tue, Apr 17, 2012 at 11:28 AM, Vinit Shenoy <vinit.shenoy-qxv4g6HH51o@public.gmane.org> wrote:
> pl022 ssp controller supports word lengths from 4 to 16 bits.
> The kernel error message says:
> "a standard pl022 can only handle 1 <= n <= 16 bit words".
>
> Fixed above range to 4 <= n <= 16.
>
> Signed-off-by: Vinit Shenoy <vinit.shenoy-qxv4g6HH51o@public.gmane.org>
> ---
>  drivers/spi/spi-pl022.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
> index 09c925a..905752f 100644
> --- a/drivers/spi/spi-pl022.c
> +++ b/drivers/spi/spi-pl022.c
> @@ -1848,7 +1848,7 @@ static int pl022_setup(struct spi_device *spi)
>                                "illegal data size for this controller!\n");
>                        dev_err(&spi->dev,
>                                "a standard pl022 can only handle "
> -                               "1 <= n <= 16 bit words\n");
> +                               "4 <= n <= 16 bit words\n");
However this print will not executed for sizes < 4
Can we have something like. [1]


>                        status = -ENOTSUPP;
>                        goto err_config_params;
>                }
> --
> 1.7.3.4
>
>
> ------------------------------------------------------------------------------
> Better than sec? Nothing is better than sec when it comes to
> monitoring Big Data applications. Try Boundary one-second
> resolution app monitoring today. Free.
> http://p.sf.net/sfu/Boundary-dev2dev
> _______________________________________________
> spi-devel-general mailing list
> spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/spi-devel-general
[1]

diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 09c925a..6444a5e 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -1823,11 +1823,7 @@ static int pl022_setup(struct spi_device *spi)
        } else
                chip->cs_control = chip_info->cs_control;

-       if (bits <= 3) {
-               /* PL022 doesn't support less than 4-bits */
-               status = -ENOTSUPP;
-               goto err_config_params;
-       } else if (bits <= 8) {
+       if (bits <= 8 && bits > 3) {
                dev_dbg(&spi->dev, "4 <= n <=8 bits per word\n");
                chip->n_bytes = 1;
                chip->read = READING_U8;
@@ -1848,7 +1844,7 @@ static int pl022_setup(struct spi_device *spi)
                                "illegal data size for this controller!\n");
                        dev_err(&spi->dev,
                                "a standard pl022 can only handle "
-                               "1 <= n <= 16 bit words\n");
+                               "4 <= n <= 16 bit words\n");
                        status = -ENOTSUPP;
                        goto err_config_params;
                }

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RE: [PATCH] spi/pl022: Fix error print while setting bits/word on pl022

[Vinit Kamalaksha SHENOY]

> From: Shubhrajyoti Datta [mailto:omaplinuxkernel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]
> Sent: Tuesday, April 17, 2012 11:55 AM

> diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
> index 09c925a..6444a5e 100644
> --- a/drivers/spi/spi-pl022.c
> +++ b/drivers/spi/spi-pl022.c
> @@ -1823,11 +1823,7 @@ static int pl022_setup(struct spi_device *spi)
>         } else
>                 chip->cs_control = chip_info->cs_control;
> 
> -       if (bits <= 3) {
> -               /* PL022 doesn't support less than 4-bits */
> -               status = -ENOTSUPP;
> -               goto err_config_params;
> -       } else if (bits <= 8) {
> +       if (bits <= 8 && bits > 3) {
>                 dev_dbg(&spi->dev, "4 <= n <=8 bits per word\n");
>                 chip->n_bytes = 1;
>                 chip->read = READING_U8;
> @@ -1848,7 +1844,7 @@ static int pl022_setup(struct spi_device *spi)
>                                 "illegal data size for this
> controller!\n");
>                         dev_err(&spi->dev,
>                                 "a standard pl022 can only handle "
> -                               "1 <= n <= 16 bit words\n");
> +                               "4 <= n <= 16 bit words\n");
>                         status = -ENOTSUPP;
>                         goto err_config_params;
>                 }

There are still few issues present here :(
Let me float V2.

--
vinit

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