[PATCH 0/3] atmel-mci fixes

[PATCH 0/3] atmel-mci fixes

[ludovic.desroches]

Hi,

The following patches provide some fixes for atmel-mci driver:
- data timeout calculation was not correct and can cause serious issues when
using a rootfs on the sd card.
- the r/w proof features is available only from 2xx hsmci version
- supports for odd clock dividers available from 5xx hsmci version

Regards

Ludovic

[PATCH 1/3] mmc: atmel-mci: correct data timeout computation

[ludovic.desroches]

From: Ludovic Desroches <ludovic.desroches@atmel.com>

The HSMCI operates at a rate of up to Master Clock divided by two.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
 drivers/mmc/host/atmel-mci.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index e4449a5..e161452 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -480,7 +480,7 @@ err:
 static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host,
 					unsigned int ns)
 {
-	return (ns * (host->bus_hz / 1000000) + 999) / 1000;
+	return (ns * ((host->bus_hz/2) / 1000000) + 999) / 1000;
 }
 
 static void atmci_set_timeout(struct atmel_mci *host,
-- 
1.7.5.4

Re: [PATCH 1/3] mmc: atmel-mci: correct data timeout computation

[Sergei Shtylyov]

Hello.

On 03/21/2012 06:41 PM, ludovic.desroches@atmel.com wrote:

> From: Ludovic Desroches<ludovic.desroches@atmel.com>

> The HSMCI operates at a rate of up to Master Clock divided by two.

> Signed-off-by: Ludovic Desroches<ludovic.desroches@atmel.com>
> ---
>   drivers/mmc/host/atmel-mci.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)

> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index e4449a5..e161452 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -480,7 +480,7 @@ err:
>   static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host,
>   					unsigned int ns)
>   {
> -	return (ns * (host->bus_hz / 1000000) + 999) / 1000;
> +	return (ns * ((host->bus_hz/2) / 1000000) + 999) / 1000;

    Why don't you keep the notation by addign spaces around '/'?
    BTW, could use DIV_ROUND_UP() here.

WBR, Sergei

Re: [PATCH 1/3] mmc: atmel-mci: correct data timeout computation

[Ludovic Desroches]

Hello Sergei,

On Wed, Mar 21, 2012 at 07:26:04PM +0300, Sergei Shtylyov wrote:
> Hello.
> 
> On 03/21/2012 06:41 PM, ludovic.desroches@atmel.com wrote:
> 
> >From: Ludovic Desroches<ludovic.desroches@atmel.com>
> 
> >The HSMCI operates at a rate of up to Master Clock divided by two.
> 
> >Signed-off-by: Ludovic Desroches<ludovic.desroches@atmel.com>
> >---
> >  drivers/mmc/host/atmel-mci.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> >diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> >index e4449a5..e161452 100644
> >--- a/drivers/mmc/host/atmel-mci.c
> >+++ b/drivers/mmc/host/atmel-mci.c
> >@@ -480,7 +480,7 @@ err:
> >  static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host,
> >  					unsigned int ns)
> >  {
> >-	return (ns * (host->bus_hz / 1000000) + 999) / 1000;
> >+	return (ns * ((host->bus_hz/2) / 1000000) + 999) / 1000;
> 
>    Why don't you keep the notation by addign spaces around '/'?
>    BTW, could use DIV_ROUND_UP() here.
> 

Thanks for your comments. BTW I have realized (when testing values return using
DIV_ROUND_UP) that I may have another issue with this timeout calculation.
I will send a new patch.

Regards

Ludovic

[PATCH v2 1/3] mmc: atmel-mci: correct data timeout computation

[ludovic.desroches]

From: Ludovic Desroches <ludovic.desroches@atmel.com>

The HSMCI operates at a rate of up to Master Clock divided by two.
Moreover previous calculation can cause overflows and so wrong
timeouts.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: stable <stable@vger.kernel.org>
---
 drivers/mmc/host/atmel-mci.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index e4449a5..3a57964 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -480,7 +480,14 @@ err:
 static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host,
 					unsigned int ns)
 {
-	return (ns * (host->bus_hz / 1000000) + 999) / 1000;
+	/*
+	 * It is easier here to use us instead of ns for the timeout,
+	 * it prevents from overflows during calculation.
+	 */
+	unsigned int us = DIV_ROUND_UP(ns, 1000);
+
+	/* Maximum clock frequency is host->bus_hz/2 */
+	return us * (DIV_ROUND_UP(host->bus_hz, 2000000));
 }
 
 static void atmci_set_timeout(struct atmel_mci *host,
-- 
1.7.5.4

Re: [PATCH v2 1/3] mmc: atmel-mci: correct data timeout computation

[Nicolas Ferre]

On 03/28/2012 12:28 PM, ludovic.desroches@atmel.com :
> From: Ludovic Desroches <ludovic.desroches@atmel.com>
> 
> The HSMCI operates at a rate of up to Master Clock divided by two.
> Moreover previous calculation can cause overflows and so wrong
> timeouts.
> 
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

> Cc: stable <stable@vger.kernel.org>
> ---
>  drivers/mmc/host/atmel-mci.c |    9 ++++++++-
>  1 files changed, 8 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index e4449a5..3a57964 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -480,7 +480,14 @@ err:
>  static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host,
>  					unsigned int ns)
>  {
> -	return (ns * (host->bus_hz / 1000000) + 999) / 1000;
> +	/*
> +	 * It is easier here to use us instead of ns for the timeout,
> +	 * it prevents from overflows during calculation.
> +	 */
> +	unsigned int us = DIV_ROUND_UP(ns, 1000);
> +
> +	/* Maximum clock frequency is host->bus_hz/2 */
> +	return us * (DIV_ROUND_UP(host->bus_hz, 2000000));
>  }
>  
>  static void atmci_set_timeout(struct atmel_mci *host,


-- 
Nicolas Ferre

Re: [PATCH v2 1/3] mmc: atmel-mci: correct data timeout computation

[Chris Ball]

Hi,

On Wed, Mar 28 2012, Nicolas Ferre wrote:
> On 03/28/2012 12:28 PM, ludovic.desroches@atmel.com :
>> From: Ludovic Desroches <ludovic.desroches@atmel.com>
>> 
>> The HSMCI operates at a rate of up to Master Clock divided by two.
>> Moreover previous calculation can cause overflows and so wrong
>> timeouts.
>> 
>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, pushed to mmc-next for 3.4.

- Chris.
-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child

[PATCH 2/3] mmc: atmel-mci: r/w proof capability only available since v2xx

[ludovic.desroches]

From: Ludovic Desroches <ludovic.desroches@atmel.com>

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
 drivers/mmc/host/atmel-mci.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index e161452..9dcb236 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -2009,6 +2009,8 @@ static void __init atmci_get_cap(struct atmel_mci *host)
 	/* keep only major version number */
 	switch (version & 0xf00) {
 	case 0x100:
+		host->caps.has_pdc = 1;
+		break;
 	case 0x200:
 		host->caps.has_pdc = 1;
 		host->caps.has_rwproof = 1;
-- 
1.7.5.4

Re: [PATCH 2/3] mmc: atmel-mci: r/w proof capability only available since v2xx

[Nicolas Ferre]

On 03/21/2012 04:41 PM, ludovic.desroches@atmel.com :
> From: Ludovic Desroches <ludovic.desroches@atmel.com>
> 
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

> ---
>  drivers/mmc/host/atmel-mci.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index e161452..9dcb236 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -2009,6 +2009,8 @@ static void __init atmci_get_cap(struct atmel_mci *host)
>  	/* keep only major version number */
>  	switch (version & 0xf00) {
>  	case 0x100:
> +		host->caps.has_pdc = 1;
> +		break;
>  	case 0x200:
>  		host->caps.has_pdc = 1;
>  		host->caps.has_rwproof = 1;


-- 
Nicolas Ferre

Re: [PATCH 2/3] mmc: atmel-mci: r/w proof capability only available since v2xx

[Chris Ball]

Hi,

On Thu, Mar 22 2012, Nicolas Ferre wrote:
> On 03/21/2012 04:41 PM, ludovic.desroches@atmel.com :
>> From: Ludovic Desroches <ludovic.desroches@atmel.com>
>> 
>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, pushed to mmc-next for 3.4.

- Chris.
-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child

[PATCH 3/3] mmc: atmel-mci: add support for odd clock dividers

[ludovic.desroches]

From: Ludovic Desroches <ludovic.desroches@atmel.com>

Add an odd clock divider capability available from v5xx. It also involves
changing the clock divider calculation.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
 drivers/mmc/host/atmel-mci-regs.h |    1 +
 drivers/mmc/host/atmel-mci.c      |   48 ++++++++++++++++++++++--------------
 2 files changed, 30 insertions(+), 19 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci-regs.h b/drivers/mmc/host/atmel-mci-regs.h
index 000b3ad..787aba1 100644
--- a/drivers/mmc/host/atmel-mci-regs.h
+++ b/drivers/mmc/host/atmel-mci-regs.h
@@ -31,6 +31,7 @@
 # define ATMCI_MR_PDCFBYTE		(  1 << 13)	/* Force Byte Transfer */
 # define ATMCI_MR_PDCPADV		(  1 << 14)	/* Padding Value */
 # define ATMCI_MR_PDCMODE		(  1 << 15)	/* PDC-oriented Mode */
+# define ATMCI_MR_CLKODD(x)		((x) << 16)	/* LSB of Clock Divider */
 #define ATMCI_DTOR			0x0008	/* Data Timeout */
 # define ATMCI_DTOCYC(x)		((x) <<  0)	/* Data Timeout Cycles */
 # define ATMCI_DTOMUL(x)		((x) <<  4)	/* Data Timeout Multiplier */
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 9dcb236..75e28c0 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -76,6 +76,7 @@ struct atmel_mci_caps {
 	bool    has_cstor_reg;
 	bool    has_highspeed;
 	bool    has_rwproof;
+	bool	has_odd_clk_div;
 };
 
 struct atmel_mci_dma {
@@ -1124,16 +1125,27 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		}
 
 		/* Calculate clock divider */
-		clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1;
-		if (clkdiv > 255) {
-			dev_warn(&mmc->class_dev,
-				"clock %u too slow; using %lu\n",
-				clock_min, host->bus_hz / (2 * 256));
-			clkdiv = 255;
+		if (host->caps.has_odd_clk_div) {
+			clkdiv = DIV_ROUND_UP(host->bus_hz, clock_min) - 2;
+			if (clkdiv > 511) {
+				dev_warn(&mmc->class_dev,
+				         "clock %u too slow; using %lu\n",
+				         clock_min, host->bus_hz / (511 + 2));
+				clkdiv = 511;
+			}
+			host->mode_reg = ATMCI_MR_CLKDIV(clkdiv >> 1)
+			                 | ATMCI_MR_CLKODD(clkdiv & 1);
+		} else {
+			clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1;
+			if (clkdiv > 255) {
+				dev_warn(&mmc->class_dev,
+				         "clock %u too slow; using %lu\n",
+				         clock_min, host->bus_hz / (2 * 256));
+				clkdiv = 255;
+			}
+			host->mode_reg = ATMCI_MR_CLKDIV(clkdiv);
 		}
 
-		host->mode_reg = ATMCI_MR_CLKDIV(clkdiv);
-
 		/*
 		 * WRPROOF and RDPROOF prevent overruns/underruns by
 		 * stopping the clock when the FIFO is full/empty.
@@ -2000,37 +2012,35 @@ static void __init atmci_get_cap(struct atmel_mci *host)
 			"version: 0x%x\n", version);
 
 	host->caps.has_dma = 0;
-	host->caps.has_pdc = 0;
+	host->caps.has_pdc = 1;
 	host->caps.has_cfg_reg = 0;
 	host->caps.has_cstor_reg = 0;
 	host->caps.has_highspeed = 0;
 	host->caps.has_rwproof = 0;
+	host->caps.has_odd_clk_div = 0;
 
 	/* keep only major version number */
 	switch (version & 0xf00) {
-	case 0x100:
-		host->caps.has_pdc = 1;
-		break;
-	case 0x200:
-		host->caps.has_pdc = 1;
-		host->caps.has_rwproof = 1;
-		break;
-	case 0x300:
-	case 0x400:
 	case 0x500:
+		host->caps.has_odd_clk_div = 1;
+	case 0x400:
+	case 0x300:
 #ifdef CONFIG_AT_HDMAC
 		host->caps.has_dma = 1;
 #else
-		host->caps.has_dma = 0;
 		dev_info(&host->pdev->dev,
 			"has dma capability but dma engine is not selected, then use pio\n");
 #endif
+		host->caps.has_pdc = 0;
 		host->caps.has_cfg_reg = 1;
 		host->caps.has_cstor_reg = 1;
 		host->caps.has_highspeed = 1;
+	case 0x200:
 		host->caps.has_rwproof = 1;
+	case 0x100:
 		break;
 	default:
+		host->caps.has_pdc = 0;
 		dev_warn(&host->pdev->dev,
 				"Unmanaged mci version, set minimum capabilities\n");
 		break;
-- 
1.7.5.4

Re: [PATCH 3/3] mmc: atmel-mci: add support for odd clock dividers

[Nicolas Ferre]

On 03/21/2012 04:41 PM, ludovic.desroches@atmel.com :
> From: Ludovic Desroches <ludovic.desroches@atmel.com>
> 
> Add an odd clock divider capability available from v5xx. It also involves
> changing the clock divider calculation.

Also tell here that you have changed the way that the switch/case
directive has been implemented.

> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Otherwise:
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>


> ---
>  drivers/mmc/host/atmel-mci-regs.h |    1 +
>  drivers/mmc/host/atmel-mci.c      |   48 ++++++++++++++++++++++--------------
>  2 files changed, 30 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/mmc/host/atmel-mci-regs.h b/drivers/mmc/host/atmel-mci-regs.h
> index 000b3ad..787aba1 100644
> --- a/drivers/mmc/host/atmel-mci-regs.h
> +++ b/drivers/mmc/host/atmel-mci-regs.h
> @@ -31,6 +31,7 @@
>  # define ATMCI_MR_PDCFBYTE		(  1 << 13)	/* Force Byte Transfer */
>  # define ATMCI_MR_PDCPADV		(  1 << 14)	/* Padding Value */
>  # define ATMCI_MR_PDCMODE		(  1 << 15)	/* PDC-oriented Mode */
> +# define ATMCI_MR_CLKODD(x)		((x) << 16)	/* LSB of Clock Divider */
>  #define ATMCI_DTOR			0x0008	/* Data Timeout */
>  # define ATMCI_DTOCYC(x)		((x) <<  0)	/* Data Timeout Cycles */
>  # define ATMCI_DTOMUL(x)		((x) <<  4)	/* Data Timeout Multiplier */
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index 9dcb236..75e28c0 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -76,6 +76,7 @@ struct atmel_mci_caps {
>  	bool    has_cstor_reg;
>  	bool    has_highspeed;
>  	bool    has_rwproof;
> +	bool	has_odd_clk_div;
>  };
>  
>  struct atmel_mci_dma {
> @@ -1124,16 +1125,27 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>  		}
>  
>  		/* Calculate clock divider */
> -		clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1;
> -		if (clkdiv > 255) {
> -			dev_warn(&mmc->class_dev,
> -				"clock %u too slow; using %lu\n",
> -				clock_min, host->bus_hz / (2 * 256));
> -			clkdiv = 255;
> +		if (host->caps.has_odd_clk_div) {
> +			clkdiv = DIV_ROUND_UP(host->bus_hz, clock_min) - 2;
> +			if (clkdiv > 511) {
> +				dev_warn(&mmc->class_dev,
> +				         "clock %u too slow; using %lu\n",
> +				         clock_min, host->bus_hz / (511 + 2));
> +				clkdiv = 511;
> +			}
> +			host->mode_reg = ATMCI_MR_CLKDIV(clkdiv >> 1)
> +			                 | ATMCI_MR_CLKODD(clkdiv & 1);
> +		} else {
> +			clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1;
> +			if (clkdiv > 255) {
> +				dev_warn(&mmc->class_dev,
> +				         "clock %u too slow; using %lu\n",
> +				         clock_min, host->bus_hz / (2 * 256));
> +				clkdiv = 255;
> +			}
> +			host->mode_reg = ATMCI_MR_CLKDIV(clkdiv);
>  		}
>  
> -		host->mode_reg = ATMCI_MR_CLKDIV(clkdiv);
> -
>  		/*
>  		 * WRPROOF and RDPROOF prevent overruns/underruns by
>  		 * stopping the clock when the FIFO is full/empty.
> @@ -2000,37 +2012,35 @@ static void __init atmci_get_cap(struct atmel_mci *host)
>  			"version: 0x%x\n", version);
>  
>  	host->caps.has_dma = 0;
> -	host->caps.has_pdc = 0;
> +	host->caps.has_pdc = 1;
>  	host->caps.has_cfg_reg = 0;
>  	host->caps.has_cstor_reg = 0;
>  	host->caps.has_highspeed = 0;
>  	host->caps.has_rwproof = 0;
> +	host->caps.has_odd_clk_div = 0;
>  
>  	/* keep only major version number */
>  	switch (version & 0xf00) {
> -	case 0x100:
> -		host->caps.has_pdc = 1;
> -		break;
> -	case 0x200:
> -		host->caps.has_pdc = 1;
> -		host->caps.has_rwproof = 1;
> -		break;
> -	case 0x300:
> -	case 0x400:
>  	case 0x500:
> +		host->caps.has_odd_clk_div = 1;
> +	case 0x400:
> +	case 0x300:
>  #ifdef CONFIG_AT_HDMAC
>  		host->caps.has_dma = 1;
>  #else
> -		host->caps.has_dma = 0;
>  		dev_info(&host->pdev->dev,
>  			"has dma capability but dma engine is not selected, then use pio\n");
>  #endif
> +		host->caps.has_pdc = 0;
>  		host->caps.has_cfg_reg = 1;
>  		host->caps.has_cstor_reg = 1;
>  		host->caps.has_highspeed = 1;
> +	case 0x200:
>  		host->caps.has_rwproof = 1;
> +	case 0x100:
>  		break;
>  	default:
> +		host->caps.has_pdc = 0;
>  		dev_warn(&host->pdev->dev,
>  				"Unmanaged mci version, set minimum capabilities\n");
>  		break;


-- 
Nicolas Ferre

Re: [PATCH 3/3] mmc: atmel-mci: add support for odd clock dividers

[Chris Ball]

Hi,

On Thu, Mar 22 2012, Nicolas Ferre wrote:
> On 03/21/2012 04:41 PM, ludovic.desroches@atmel.com :
>> From: Ludovic Desroches <ludovic.desroches@atmel.com>
>> 
>> Add an odd clock divider capability available from v5xx. It also involves
>> changing the clock divider calculation.
>
> Also tell here that you have changed the way that the switch/case
> directive has been implemented.
>
>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> Otherwise:
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, pushed to mmc-next for 3.4 with a rewording:

    Add an odd clock divider capability available from v5xx. It also involves
    changing the clock divider calculation, and changing the switch-case
    statement to use top-down fallthrough.

- Chris.
-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child

Re: [PATCH 3/3] mmc: atmel-mci: add support for odd clock dividers

[Ludovic Desroches]

Hi Chris,

On Sat, Mar 31, 2012 at 11:44:41PM -0400, Chris Ball wrote:
> Hi,
> 
> On Thu, Mar 22 2012, Nicolas Ferre wrote:
> > On 03/21/2012 04:41 PM, ludovic.desroches@atmel.com :
> >> From: Ludovic Desroches <ludovic.desroches@atmel.com>
> >> 
> >> Add an odd clock divider capability available from v5xx. It also involves
> >> changing the clock divider calculation.
> >
> > Also tell here that you have changed the way that the switch/case
> > directive has been implemented.
> >
> >> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> >
> > Otherwise:
> > Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> 
> Thanks, pushed to mmc-next for 3.4 with a rewording:
> 
>     Add an odd clock divider capability available from v5xx. It also involves
>     changing the clock divider calculation, and changing the switch-case
>     statement to use top-down fallthrough.
> 
> - Chris.
> -- 
> Chris Ball   <cjb@laptop.org>   <http://printf.net/>
> One Laptop Per Child

Thanks for rewording the commit message.


Regards

Ludovic