[PATCH reword] ARM: MVEBU: Netgear RN102: Use Hardware BCH ECC

[PATCH reword] ARM: MVEBU: Netgear RN102: Use Hardware BCH ECC

[klightspeed at killerwolves.net]

The bootloader on the Netgear ReadyNAS RN102 uses Hardware BCH ECC
(strength = 4), while the pxa3xx NAND driver by default uses 
Hamming ECC (strength = 1).

This patch changes the ECC mode on these machines to match that
of the bootloader and of the stock firmware. That way, it is
now possible to update the kernel from userland (e.g. using
standard tools from mtd-utils package); u-boot will happily
load and boot it.

Fixes: 92beaccd8b49 ("ARM: mvebu: Enable NAND controller in ReadyNAS 102 .dts file")
Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Arnaud Ebalard <arno@natisbad.org>
---
 arch/arm/boot/dts/armada-370-netgear-rn102.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/armada-370-netgear-rn102.dts b/arch/arm/boot/dts/armada-370-netgear-rn102.dts
index d6d572e..285524f 100644
--- a/arch/arm/boot/dts/armada-370-netgear-rn102.dts
+++ b/arch/arm/boot/dts/armada-370-netgear-rn102.dts
@@ -143,6 +143,10 @@
 				marvell,nand-enable-arbiter;
 				nand-on-flash-bbt;
 
+				/* Use Hardware BCH ECC */
+				nand-ecc-strength = <4>;
+				nand-ecc-step-size = <512>;
+
 				partition at 0 {
 					label = "u-boot";
 					reg = <0x0000000 0x180000>;  /* 1.5MB */
-- 
1.8.5.5

[PATCH reword] ARM: MVEBU: Netgear RN102: Use Hardware BCH ECC

[Jason Cooper]

On Wed, Sep 10, 2014 at 06:55:41PM +1000, klightspeed at killerwolves.net wrote:
> The bootloader on the Netgear ReadyNAS RN102 uses Hardware BCH ECC
> (strength = 4), while the pxa3xx NAND driver by default uses 
> Hamming ECC (strength = 1).
> 
> This patch changes the ECC mode on these machines to match that
> of the bootloader and of the stock firmware. That way, it is
> now possible to update the kernel from userland (e.g. using
> standard tools from mtd-utils package); u-boot will happily
> load and boot it.
> 
> Fixes: 92beaccd8b49 ("ARM: mvebu: Enable NAND controller in ReadyNAS 102 .dts file")
> Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
> Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
> Tested-by: Arnaud Ebalard <arno@natisbad.org>
> ---
>  arch/arm/boot/dts/armada-370-netgear-rn102.dts | 4 ++++
>  1 file changed, 4 insertions(+)

I've already applied this the mvebu/fixes:

  500abb6ccb9e ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC

thx,

Jason.

[PATCH reword] ARM: MVEBU: Netgear RN102: Use Hardware BCH ECC

[Ben Peddell]

On 14/09/14 07:08, Jason Cooper wrote:
> On Wed, Sep 10, 2014 at 06:55:41PM +1000, klightspeed at killerwolves.net wrote:
>> The bootloader on the Netgear ReadyNAS RN102 uses Hardware BCH ECC
>> (strength = 4), while the pxa3xx NAND driver by default uses 
>> Hamming ECC (strength = 1).
>>
>> This patch changes the ECC mode on these machines to match that
>> of the bootloader and of the stock firmware. That way, it is
>> now possible to update the kernel from userland (e.g. using
>> standard tools from mtd-utils package); u-boot will happily
>> load and boot it.
>>
>> Fixes: 92beaccd8b49 ("ARM: mvebu: Enable NAND controller in ReadyNAS 102 .dts file")
>> Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
>> Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
>> Tested-by: Arnaud Ebalard <arno@natisbad.org>
>> ---
>>  arch/arm/boot/dts/armada-370-netgear-rn102.dts | 4 ++++
>>  1 file changed, 4 insertions(+)
> 
> I've already applied this the mvebu/fixes:
> 
>   500abb6ccb9e ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC

That patch only affects arch/arm/boot/dts/armada-xp-netgear-rn2120.dts

The patch I posted affects arch/arm/boot/dts/armada-370-netgear-rn102.dts

[PATCH reword] ARM: MVEBU: Netgear RN102: Use Hardware BCH ECC

[Jason Cooper]

On Sun, Sep 14, 2014 at 12:54:01PM +1000, Ben Peddell wrote:
> On 14/09/14 07:08, Jason Cooper wrote:
> > On Wed, Sep 10, 2014 at 06:55:41PM +1000, klightspeed at killerwolves.net wrote:
> >> The bootloader on the Netgear ReadyNAS RN102 uses Hardware BCH ECC
> >> (strength = 4), while the pxa3xx NAND driver by default uses 
> >> Hamming ECC (strength = 1).
> >>
> >> This patch changes the ECC mode on these machines to match that
> >> of the bootloader and of the stock firmware. That way, it is
> >> now possible to update the kernel from userland (e.g. using
> >> standard tools from mtd-utils package); u-boot will happily
> >> load and boot it.
> >>
> >> Fixes: 92beaccd8b49 ("ARM: mvebu: Enable NAND controller in ReadyNAS 102 .dts file")
> >> Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
> >> Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
> >> Tested-by: Arnaud Ebalard <arno@natisbad.org>
> >> ---
> >>  arch/arm/boot/dts/armada-370-netgear-rn102.dts | 4 ++++
> >>  1 file changed, 4 insertions(+)
> > 
> > I've already applied this the mvebu/fixes:
> > 
> >   500abb6ccb9e ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC
> 
> That patch only affects arch/arm/boot/dts/armada-xp-netgear-rn2120.dts
> 
> The patch I posted affects arch/arm/boot/dts/armada-370-netgear-rn102.dts

Gah!  You're right.  Applied to mvebu/fixes and Cc'd the stable v3.14+

thx,

Jason.