include/linux/platform_data/mtd-nand-pxa3xx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_ARCH_PXA3XX_NAND_H
   3 #define __ASM_ARCH_PXA3XX_NAND_H
   4
   5 #include <linux/mtd/mtd.h>
   6 #include <linux/mtd/partitions.h>
   7
   8 /*
   9  * Current pxa3xx_nand controller has two chip select which
  10  * both be workable.
  11  *
  12  * Notice should be taken that:
  13  * When you want to use this feature, you should not enable the
  14  * keep configuration feature, for two chip select could be
  15  * attached with different nand chip. The different page size
  16  * and timing requirement make the keep configuration impossible.
  17  */
  18
  19 /* The max num of chip select current support */
  20 #define NUM_CHIP_SELECT         (2)
  21 struct pxa3xx_nand_platform_data {
  22
  23         /* the data flash bus is shared between the Static Memory
  24          * Controller and the Data Flash Controller,  the arbiter
  25          * controls the ownership of the bus
  26          */
  27         int     enable_arbiter;
  28
  29         /* allow platform code to keep OBM/bootloader defined NFC config */
  30         int     keep_config;
  31
  32         /* indicate how many chip selects will be used */
  33         int     num_cs;
  34
  35         /* use an flash-based bad block table */
  36         bool    flash_bbt;
  37
  38         /* requested ECC strength and ECC step size */
  39         int ecc_strength, ecc_step_size;
  40
  41         const struct mtd_partition              *parts[NUM_CHIP_SELECT];
  42         unsigned int                            nr_parts[NUM_CHIP_SELECT];
  43 };
  44
  45 extern void pxa3xx_set_nand_info(struct pxa3xx_nand_platform_data *info);
  46 #endif /* __ASM_ARCH_PXA3XX_NAND_H */