[PATCH] mtd: rawnand: stm32_fmc2: do not support EDO mode
christophe.kerello at foss.st.com
Mon Mar 27 01:02:13 PDT 2023
On 3/24/23 17:34, Christophe Kerello wrote:
> Hello Miquel,
> On 3/24/23 17:25, Miquel Raynal wrote:
>> Hi Christophe,
>> christophe.kerello at foss.st.com wrote on Fri, 24 Mar 2023 17:09:18 +0100:
>>> FMC2 controller does not support EDO mode (timings mode 4 and 5).
>>> Signed-off-by: Christophe Kerello <christophe.kerello at foss.st.com>
>>> Fixes: 2cd457f328c1 ("mtd: rawnand: stm32_fmc2: add STM32 FMC2 NAND
>>> flash controller driver")
>>> drivers/mtd/nand/raw/stm32_fmc2_nand.c | 3 +++
>>> 1 file changed, 3 insertions(+)
>>> diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
>>> index 5d627048c420..3abb63d00a0b 100644
>>> --- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
>>> +++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
>>> @@ -1531,6 +1531,9 @@ static int
>>> stm32_fmc2_nfc_setup_interface(struct nand_chip *chip, int chipnr,
>>> if (IS_ERR(sdrt))
>>> return PTR_ERR(sdrt);
>>> + if (sdrt->tRC_min < 30000)
>> When introducing NV-DDR support we as well added a timings.mode field,
>> perhaps you could use it?
> Yes, I can use it. It will be done in V2.
> Christophe Kerello.
I had a look at Kernel LTS, and timings.mode was introduced on Kernel
LTS 5.10. As this patch has also to be applied on Kernel LTS 5.4, my
proposal is to send a new patch set. The first patch will be the current
patch (fix for all Kernel LTS) and the second patch will use
timings.mode instead of checking tRC_min timings for next Kernel
delivery. Is this proposal acceptable?
>>> + return -EOPNOTSUPP;
>>> if (chipnr == NAND_DATA_IFACE_CHECK_ONLY)
>>> return 0;
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