[Linux-stm32] [PATCH v4 2/3] mtd: rawnand: stm32_fmc2: add STM32 FMC2 NAND flash controller driver

[Boris Brezillon]

On Fri, 14 Dec 2018 10:58:07 +0100
Christophe Kerello <christophe.kerello at st.com> wrote:

> 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 at st.com>

Reviewed-by: Boris Brezillon <boris.brezillon at bootlin.com>