lkml.org 
[lkml]   [2018]   [Apr]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 1/2] mtd: rawnand: gpmi: add support for specific ECC strength
Han,

On 15.03.2018 16:39, Stefan Agner wrote:
> On March 15, 2018 4:36:20 PM GMT+01:00, Boris Brezillon
> <boris.brezillon@bootlin.com> wrote:
>>Hi,
>>
>>On Sun, 4 Mar 2018 21:06:01 +0100
>>Stefan Agner <stefan@agner.ch> wrote:
>>
>>> Add support for specified ECC strength/size using device tree
>>> properties nand-ecc-strength/nand-ecc-step-size.
>>
>>Han, we didn't hear back from you on that. Are you okay with adding
>>these new properties? IIRC, you feared there would be a delta between
>>u-boot and linux support.

Any comment on this?

U-Boot support for device tree support and the same properties is
underway.

--
Stefan


>>
>>Stephan, there's no changelog. Has anything changed in this version or
>>is this just a RESEND?
>
> Sorry forgot that. I just split documentation and driver changes.
>
> --
> Stefan
>
>>
>>Regards,
>>
>>Boris
>>
>>>
>>> Signed-off-by: Stefan Agner <stefan@agner.ch>
>>> ---
>>> drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 30
>>++++++++++++++++++++----------
>>> 1 file changed, 20 insertions(+), 10 deletions(-)
>>>
>>> diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>>b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>>> index 61fdd733492f..d04754289c03 100644
>>> --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>>> +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>>> @@ -198,17 +198,16 @@ static inline bool gpmi_check_ecc(struct
>>gpmi_nand_data *this)
>>> *
>>> * We may have available oob space in this case.
>>> */
>>> -static int set_geometry_by_ecc_info(struct gpmi_nand_data *this)
>>> +static int set_geometry_by_ecc_info(struct gpmi_nand_data *this,
>>> + unsigned int ecc_strength,
>>> + unsigned int ecc_step)
>>> {
>>> struct bch_geometry *geo = &this->bch_geometry;
>>> struct nand_chip *chip = &this->nand;
>>> struct mtd_info *mtd = nand_to_mtd(chip);
>>> unsigned int block_mark_bit_offset;
>>>
>>> - if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
>>> - return -EINVAL;
>>> -
>>> - switch (chip->ecc_step_ds) {
>>> + switch (ecc_step) {
>>> case SZ_512:
>>> geo->gf_len = 13;
>>> break;
>>> @@ -221,8 +220,8 @@ static int set_geometry_by_ecc_info(struct
>>gpmi_nand_data *this)
>>> chip->ecc_strength_ds, chip->ecc_step_ds);
>>> return -EINVAL;
>>> }
>>> - geo->ecc_chunk_size = chip->ecc_step_ds;
>>> - geo->ecc_strength = round_up(chip->ecc_strength_ds, 2);
>>> + geo->ecc_chunk_size = ecc_step;
>>> + geo->ecc_strength = round_up(ecc_strength, 2);
>>> if (!gpmi_check_ecc(this))
>>> return -EINVAL;
>>>
>>> @@ -230,7 +229,7 @@ static int set_geometry_by_ecc_info(struct
>>gpmi_nand_data *this)
>>> if (geo->ecc_chunk_size < mtd->oobsize) {
>>> dev_err(this->dev,
>>> "unsupported nand chip. ecc size: %d, oob size : %d\n",
>>> - chip->ecc_step_ds, mtd->oobsize);
>>> + ecc_step, mtd->oobsize);
>>> return -EINVAL;
>>> }
>>>
>>> @@ -423,9 +422,20 @@ static int legacy_set_geometry(struct
>>gpmi_nand_data *this)
>>>
>>> int common_nfc_set_geometry(struct gpmi_nand_data *this)
>>> {
>>> + struct nand_chip *chip = &this->nand;
>>> +
>>> + if (chip->ecc.strength > 0 && chip->ecc.size > 0)
>>> + return set_geometry_by_ecc_info(this, chip->ecc.strength,
>>> + chip->ecc.size);
>>> +
>>> if ((of_property_read_bool(this->dev->of_node,
>>"fsl,use-minimum-ecc"))
>>> - || legacy_set_geometry(this))
>>> - return set_geometry_by_ecc_info(this);
>>> + || legacy_set_geometry(this)) {
>>> + if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
>>> + return -EINVAL;
>>> +
>>> + return set_geometry_by_ecc_info(this, chip->ecc_strength_ds,
>>> + chip->ecc_step_ds);
>>> + }
>>>
>>> return 0;
>>> }

\
 
 \ /
  Last update: 2018-04-12 08:57    [W:0.104 / U:1.244 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site