Merge tag 'for-linus-20160523' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "First cycle with Boris as NAND maintainer! Many (most) bullets stolen
  from him.

  Generic:
   - Migrated NAND LED trigger to be a generic MTD trigger

  NAND:
   - Introduction of the "ECC algorithm" concept, to avoid overloading
     the ECC mode field too much more
   - Replaced the nand_ecclayout infrastructure with something a little
     more flexible (finally!) and future proof
   - Rework of the OMAP GPMC and NAND drivers; the TI folks pulled some
     of this into their own tree as well
   - Prepare the sunxi NAND driver to receive DMA support
   - Handle bitflips in erased pages on GPMI revisions that do not
     support this in hardware.

  SPI NOR:
   - Start using the spi_flash_read() API for SPI drivers that support
     it (i.e., SPI drivers with special memory-mapped flash modes)

  And other small scattered improvments"

* tag 'for-linus-20160523' of git://git.infradead.org/linux-mtd: (155 commits)
  mtd: spi-nor: support GigaDevice gd25lq64c
  mtd: nand_bch: fix spelling of "probably"
  mtd: brcmnand: respect ECC algorithm set by NAND subsystem
  gpmi-nand: Handle ECC Errors in erased pages
  Documentation: devicetree: deprecate "soft_bch" nand-ecc-mode value
  mtd: nand: add support for "nand-ecc-algo" DT property
  mtd: mtd: drop NAND_ECC_SOFT_BCH enum value
  mtd: drop support for NAND_ECC_SOFT_BCH as "soft_bch" mapping
  mtd: nand: read ECC algorithm from the new field
  mtd: nand: fsmc: validate ECC setup by checking algorithm directly
  mtd: nand: set ECC algorithm to Hamming on fallback
  staging: mt29f_spinand: set ECC algorithm explicitly
  CRIS v32: nand: set ECC algorithm explicitly
  mtd: nand: atmel: set ECC algorithm explicitly
  mtd: nand: davinci: set ECC algorithm explicitly
  mtd: nand: bf5xx: set ECC algorithm explicitly
  mtd: nand: omap2: Fix high memory dma prefetch transfer
  mtd: nand: omap2: Start dma request before enabling prefetch
  mtd: nandsim: add __init attribute
  mtd: nand: move of_get_nand_xxx() helpers into nand_base.c
  ...

2 files changed, 179 insertions, 5 deletions

diff --git a/include/linux/platform_data/gpmc-omap.h b/include/linux/platform_data/gpmc-omap.h
new file mode 100644
index 000000000000..67ccdb0e1606
--- /dev/null
+++ b/include/linux/platform_data/gpmc-omap.h
@@ -0,0 +1,172 @@
+/*
+ * OMAP GPMC Platform data
+ *
+ * Copyright (C) 2014 Texas Instruments, Inc. - http://www.ti.com
+ *      Roger Quadros <rogerq@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#ifndef _GPMC_OMAP_H_
+#define _GPMC_OMAP_H_
+
+/* Maximum Number of Chip Selects */
+#define GPMC_CS_NUM             8
+
+/* bool type time settings */
+struct gpmc_bool_timings {
+        bool cycle2cyclediffcsen;
+        bool cycle2cyclesamecsen;
+        bool we_extra_delay;
+        bool oe_extra_delay;
+        bool adv_extra_delay;
+        bool cs_extra_delay;
+        bool time_para_granularity;
+};
+
+/*
+ * Note that all values in this struct are in nanoseconds except sync_clk
+ * (which is in picoseconds), while the register values are in gpmc_fck cycles.
+ */
+struct gpmc_timings {
+        /* Minimum clock period for synchronous mode (in picoseconds) */
+        u32 sync_clk;
+
+        /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
+        u32 cs_on;              /* Assertion time */
+        u32 cs_rd_off;          /* Read deassertion time */
+        u32 cs_wr_off;          /* Write deassertion time */
+
+        /* ADV signal timings corresponding to GPMC_CONFIG3 */
+        u32 adv_on;             /* Assertion time */
+        u32 adv_rd_off;         /* Read deassertion time */
+        u32 adv_wr_off;         /* Write deassertion time */
+        u32 adv_aad_mux_on;     /* ADV assertion time for AAD */
+        u32 adv_aad_mux_rd_off; /* ADV read deassertion time for AAD */
+        u32 adv_aad_mux_wr_off; /* ADV write deassertion time for AAD */
+
+        /* WE signals timings corresponding to GPMC_CONFIG4 */
+        u32 we_on;              /* WE assertion time */
+        u32 we_off;             /* WE deassertion time */
+
+        /* OE signals timings corresponding to GPMC_CONFIG4 */
+        u32 oe_on;              /* OE assertion time */
+        u32 oe_off;             /* OE deassertion time */
+        u32 oe_aad_mux_on;      /* OE assertion time for AAD */
+        u32 oe_aad_mux_off;     /* OE deassertion time for AAD */
+
+        /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
+        u32 page_burst_access;  /* Multiple access word delay */
+        u32 access;             /* Start-cycle to first data valid delay */
+        u32 rd_cycle;           /* Total read cycle time */
+        u32 wr_cycle;           /* Total write cycle time */
+
+        u32 bus_turnaround;
+        u32 cycle2cycle_delay;
+
+        u32 wait_monitoring;
+        u32 clk_activation;
+
+        /* The following are only on OMAP3430 */
+        u32 wr_access;          /* WRACCESSTIME */
+        u32 wr_data_mux_bus;    /* WRDATAONADMUXBUS */
+
+        struct gpmc_bool_timings bool_timings;
+};
+
+/* Device timings in picoseconds */
+struct gpmc_device_timings {
+        u32 t_ceasu;    /* address setup to CS valid */
+        u32 t_avdasu;   /* address setup to ADV valid */
+        /* XXX: try to combine t_avdp_r & t_avdp_w. Issue is
+         * of tusb using these timings even for sync whilst
+         * ideally for adv_rd/(wr)_off it should have considered
+         * t_avdh instead. This indirectly necessitates r/w
+         * variations of t_avdp as it is possible to have one
+         * sync & other async
+         */
+        u32 t_avdp_r;   /* ADV low time (what about t_cer ?) */
+        u32 t_avdp_w;
+        u32 t_aavdh;    /* address hold time */
+        u32 t_oeasu;    /* address setup to OE valid */
+        u32 t_aa;       /* access time from ADV assertion */
+        u32 t_iaa;      /* initial access time */
+        u32 t_oe;       /* access time from OE assertion */
+        u32 t_ce;       /* access time from CS asertion */
+        u32 t_rd_cycle; /* read cycle time */
+        u32 t_cez_r;    /* read CS deassertion to high Z */
+        u32 t_cez_w;    /* write CS deassertion to high Z */
+        u32 t_oez;      /* OE deassertion to high Z */
+        u32 t_weasu;    /* address setup to WE valid */
+        u32 t_wpl;      /* write assertion time */
+        u32 t_wph;      /* write deassertion time */
+        u32 t_wr_cycle; /* write cycle time */
+
+        u32 clk;
+        u32 t_bacc;     /* burst access valid clock to output delay */
+        u32 t_ces;      /* CS setup time to clk */
+        u32 t_avds;     /* ADV setup time to clk */
+        u32 t_avdh;     /* ADV hold time from clk */
+        u32 t_ach;      /* address hold time from clk */
+        u32 t_rdyo;     /* clk to ready valid */
+
+        u32 t_ce_rdyz;  /* XXX: description ?, or use t_cez instead */
+        u32 t_ce_avd;   /* CS on to ADV on delay */
+
+        /* XXX: check the possibility of combining
+         * cyc_aavhd_oe & cyc_aavdh_we
+         */
+        u8 cyc_aavdh_oe;/* read address hold time in cycles */
+        u8 cyc_aavdh_we;/* write address hold time in cycles */
+        u8 cyc_oe;      /* access time from OE assertion in cycles */
+        u8 cyc_wpl;     /* write deassertion time in cycles */
+        u32 cyc_iaa;    /* initial access time in cycles */
+
+        /* extra delays */
+        bool ce_xdelay;
+        bool avd_xdelay;
+        bool oe_xdelay;
+        bool we_xdelay;
+};
+
+#define GPMC_BURST_4                    4       /* 4 word burst */
+#define GPMC_BURST_8                    8       /* 8 word burst */
+#define GPMC_BURST_16                   16      /* 16 word burst */
+#define GPMC_DEVWIDTH_8BIT              1       /* 8-bit device width */
+#define GPMC_DEVWIDTH_16BIT             2       /* 16-bit device width */
+#define GPMC_MUX_AAD                    1       /* Addr-Addr-Data multiplex */
+#define GPMC_MUX_AD                     2       /* Addr-Data multiplex */
+
+struct gpmc_settings {
+        bool burst_wrap;        /* enables wrap bursting */
+        bool burst_read;        /* enables read page/burst mode */
+        bool burst_write;       /* enables write page/burst mode */
+        bool device_nand;       /* device is NAND */
+        bool sync_read;         /* enables synchronous reads */
+        bool sync_write;        /* enables synchronous writes */
+        bool wait_on_read;      /* monitor wait on reads */
+        bool wait_on_write;     /* monitor wait on writes */
+        u32 burst_len;          /* page/burst length */
+        u32 device_width;       /* device bus width (8 or 16 bit) */
+        u32 mux_add_data;       /* multiplex address & data */
+        u32 wait_pin;           /* wait-pin to be used */
+};
+
+/* Data for each chip select */
+struct gpmc_omap_cs_data {
+        bool valid;                     /* data is valid */
+        bool is_nand;                   /* device within this CS is NAND */
+        struct gpmc_settings *settings;
+        struct gpmc_device_timings *device_timings;
+        struct gpmc_timings *gpmc_timings;
+        struct platform_device *pdev;   /* device within this CS region */
+        unsigned int pdata_size;
+};
+
+struct gpmc_omap_platform_data {
+        struct gpmc_omap_cs_data cs[GPMC_CS_NUM];
+};
+
+#endif /* _GPMC_OMAP_H */
diff --git a/include/linux/platform_data/mtd-nand-omap2.h b/include/linux/platform_data/mtd-nand-omap2.h
index 090bbab0130a..17d57a18bac5 100644
--- a/include/linux/platform_data/mtd-nand-omap2.h
+++ b/include/linux/platform_data/mtd-nand-omap2.h
@@ -45,7 +45,6 @@ enum omap_ecc {
 };
 
 struct gpmc_nand_regs {
-        void __iomem    *gpmc_status;
         void __iomem    *gpmc_nand_command;
         void __iomem    *gpmc_nand_address;
         void __iomem    *gpmc_nand_data;
@@ -64,21 +63,24 @@ struct gpmc_nand_regs {
         void __iomem    *gpmc_bch_result4[GPMC_BCH_NUM_REMAINDER];
         void __iomem    *gpmc_bch_result5[GPMC_BCH_NUM_REMAINDER];
         void __iomem    *gpmc_bch_result6[GPMC_BCH_NUM_REMAINDER];
+        /* Deprecated. Do not use */
+        void __iomem    *gpmc_status;
 };
 
 struct omap_nand_platform_data {
         int                     cs;
         struct mtd_partition    *parts;
         int                     nr_parts;
-        bool                    dev_ready;
         bool                    flash_bbt;
         enum nand_io            xfer_type;
         int                     devsize;
         enum omap_ecc           ecc_opt;
-        struct gpmc_nand_regs   reg;
 
-        /* for passing the partitions */
-        struct device_node      *of_node;
         struct device_node      *elm_of_node;
+
+        /* deprecated */
+        struct gpmc_nand_regs   reg;
+        struct device_node      *of_node;
+        bool                    dev_ready;
 };
 #endif