Hi Miquèl,
This patchset already takes into account new framework modifications
done by Boris (3rd batch of cleanups).
The select_chip hook is not used any more in this patchset and
exec_op/setup_data_interface hooks have been moved to
nand_controller_ops structure.
static const struct nand_controller_ops stm32_fmc2_nand_controller_ops = {
.attach_chip = stm32_fmc2_attach_chip,
.exec_op = stm32_fmc2_exec_op,
.setup_data_interface = stm32_fmc2_setup_interface,
};
Regards,
Christophe Kerello.
On 12/7/18 11:18 AM, Miquel Raynal wrote:
Hi Christophe,
Christophe Kerello <christophe.kerello@xxxxxx> wrote on Thu, 29 Nov
2018 17:41:02 +0100:
The driver adds the support for the STMicroelectronics FMC2 NAND
Controller found on STM32MP SOCs.
This patch is based on FMC2 command sequencer.
The purpose of the command sequencer is to facilitate the programming
and the reading of NAND flash pages with the ECC and to free the CPU
of sequencing tasks.
It requires one DMA channel for write and two DMA channels for read
operations.
Only NAND_ECC_HW mode is actually supported.
The driver supports a maximum 8k page size.
The following ECC strength and step size are currently supported:
- nand-ecc-strength = <8>, nand-ecc-step-size = <512> (BCH8)
- nand-ecc-strength = <4>, nand-ecc-step-size = <512> (BCH4)
- nand-ecc-strength = <1>, nand-ecc-step-size = <512> (Extended ECC
based on Hamming)
This patch has been tested on Micron MT29F8G08ABACAH4 and
MT29F8G16ABACAH4
Signed-off-by: Christophe Kerello <christophe.kerello@xxxxxx>
---
The driver look's good to me. However, Boris contributed new
cleanups that I would like you to take into account before doing
another 'deep' review. Please rebase on top of nand/next and have
a look at the followingcommits. For the ->select_chip() hook, it
should not be exposed anymore and switches should be handled
locally by the driver (you have examples).
7a08dbaedd36 mtd: rawnand: Move ->setup_data_interface() to nand_controller_ops
f2abfeb2078b mtd: rawnand: Move the ->exec_op() method to nand_controller_ops
7d6c37e90cf9 mtd: rawnand: Deprecate the ->select_chip() hook
1770022ffa85 mtd: rawnand: ams-delta: Stop implementing ->select_chip()
653c57c7da08 mtd: rawnand: vf610: Stop implementing ->select_chip()
2ace451cae22 mtd: rawnand: tegra: Stop implementing ->select_chip()
b25251414f6e mtd: rawnand: marvell: Stop implementing ->select_chip()
550b9fc4e3af mtd: rawnand: fsmc: Stop implementing ->select_chip()
02b4a52604a4 mtd: rawnand: Make ->select_chip() optional when ->exec_op() is implemented
ae2294b10b0f mtd: rawnand: Pass the CS line to be selected in struct nand_operation
1d0178593d14 mtd: rawnand: Add nand_[de]select_target() helpers
While at it, could you also address Linus W. comments.
Thanks,
Miquèl
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