ARM: OMAP2+: Remove legacy gpmc-nand.c

This code is no longer used and can be removed as we
are using device tree.

Removing this code also removes a dependency between
drivers/mtd and arch/arm/mach-omap2 making furhter driver
changes easier.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
[tony@atomide.com: removed from header too, updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 093458b..c89757a 100644 (file)
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -241,6 +241,3 @@ obj-$(CONFIG_MACH_OMAP2_TUSB6010)   += usb-tusb6010.o
 
 onenand-$(CONFIG_MTD_ONENAND_OMAP2)    := gpmc-onenand.o
 obj-y                                  += $(onenand-m) $(onenand-y)
-
-nand-$(CONFIG_MTD_NAND_OMAP2)          := gpmc-nand.o
-obj-y                                  += $(nand-m) $(nand-y)

diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
deleted file mode 100644 (file)
index f6ac027..0000000
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * gpmc-nand.c
- *
- * Copyright (C) 2009 Texas Instruments
- * Vimal Singh <vimalsingh@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/omap-gpmc.h>
-#include <linux/mtd/nand.h>
-#include <linux/platform_data/mtd-nand-omap2.h>
-
-#include <asm/mach/flash.h>
-
-#include "soc.h"
-
-/* minimum size for IO mapping */
-#define        NAND_IO_SIZE    4
-
-static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
-{
-       /* platforms which support all ECC schemes */
-       if (soc_is_am33xx() || soc_is_am43xx() || cpu_is_omap44xx() ||
-                soc_is_omap54xx() || soc_is_dra7xx())
-               return 1;
-
-       if (ecc_opt == OMAP_ECC_BCH4_CODE_HW_DETECTION_SW ||
-                ecc_opt == OMAP_ECC_BCH8_CODE_HW_DETECTION_SW) {
-               if (cpu_is_omap24xx())
-                       return 0;
-               else if (cpu_is_omap3630() && (GET_OMAP_REVISION() == 0))
-                       return 0;
-               else
-                       return 1;
-       }
-
-       /* OMAP3xxx do not have ELM engine, so cannot support ECC schemes
-        * which require H/W based ECC error detection */
-       if ((cpu_is_omap34xx() || cpu_is_omap3630()) &&
-           ((ecc_opt == OMAP_ECC_BCH4_CODE_HW) ||
-                (ecc_opt == OMAP_ECC_BCH8_CODE_HW)))
-               return 0;
-
-       /* legacy platforms support only HAM1 (1-bit Hamming) ECC scheme */
-       if (ecc_opt == OMAP_ECC_HAM1_CODE_HW ||
-           ecc_opt == OMAP_ECC_HAM1_CODE_SW)
-               return 1;
-       else
-               return 0;
-}
-
-/* This function will go away once the device-tree convertion is complete */
-static void gpmc_set_legacy(struct omap_nand_platform_data *gpmc_nand_data,
-                           struct gpmc_settings *s)
-{
-       /* Enable RD PIN Monitoring Reg */
-       if (gpmc_nand_data->dev_ready) {
-               s->wait_on_read = true;
-               s->wait_on_write = true;
-       }
-
-       if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
-               s->device_width = GPMC_DEVWIDTH_16BIT;
-       else
-               s->device_width = GPMC_DEVWIDTH_8BIT;
-}
-
-int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
-                  struct gpmc_timings *gpmc_t)
-{
-       int err = 0;
-       struct gpmc_settings s;
-       struct platform_device *pdev;
-       struct resource gpmc_nand_res[] = {
-               { .flags = IORESOURCE_MEM, },
-               { .flags = IORESOURCE_IRQ, },
-               { .flags = IORESOURCE_IRQ, },
-       };
-
-       BUG_ON(gpmc_nand_data->cs >= GPMC_CS_NUM);
-
-       err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
-                             (unsigned long *)&gpmc_nand_res[0].start);
-       if (err < 0) {
-               pr_err("omap2-gpmc: Cannot request GPMC CS %d, error %d\n",
-                      gpmc_nand_data->cs, err);
-               return err;
-       }
-       gpmc_nand_res[0].end = gpmc_nand_res[0].start + NAND_IO_SIZE - 1;
-       gpmc_nand_res[1].start = gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
-       gpmc_nand_res[2].start = gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
-
-       memset(&s, 0, sizeof(struct gpmc_settings));
-       gpmc_set_legacy(gpmc_nand_data, &s);
-
-       s.device_nand = true;
-
-       if (gpmc_t) {
-               err = gpmc_cs_set_timings(gpmc_nand_data->cs, gpmc_t, &s);
-               if (err < 0) {
-                       pr_err("omap2-gpmc: Unable to set gpmc timings: %d\n",
-                              err);
-                       return err;
-               }
-       }
-
-       err = gpmc_cs_program_settings(gpmc_nand_data->cs, &s);
-       if (err < 0)
-               goto out_free_cs;
-
-       err = gpmc_configure(GPMC_CONFIG_WP, 0);
-       if (err < 0)
-               goto out_free_cs;
-
-       if (!gpmc_hwecc_bch_capable(gpmc_nand_data->ecc_opt)) {
-               pr_err("omap2-nand: Unsupported NAND ECC scheme selected\n");
-               err = -EINVAL;
-               goto out_free_cs;
-       }
-
-
-       pdev = platform_device_alloc("omap2-nand", gpmc_nand_data->cs);
-       if (pdev) {
-               err = platform_device_add_resources(pdev, gpmc_nand_res,
-                                                   ARRAY_SIZE(gpmc_nand_res));
-               if (!err)
-                       pdev->dev.platform_data = gpmc_nand_data;
-       } else {
-               err = -ENOMEM;
-       }
-       if (err)
-               goto out_free_pdev;
-
-       err = platform_device_add(pdev);
-       if (err) {
-               dev_err(&pdev->dev, "Unable to register NAND device\n");
-               goto out_free_pdev;
-       }
-
-       return 0;
-
-out_free_pdev:
-       platform_device_put(pdev);
-out_free_cs:
-       gpmc_cs_free(gpmc_nand_data->cs);
-
-       return err;
-}

diff --git a/include/linux/omap-gpmc.h b/include/linux/omap-gpmc.h
index e821a31..fd0de00 100644 (file)
--- a/include/linux/omap-gpmc.h
+++ b/include/linux/omap-gpmc.h
@@ -76,17 +76,6 @@ struct gpmc_timings;
 struct omap_nand_platform_data;
 struct omap_onenand_platform_data;
 
-#if IS_ENABLED(CONFIG_MTD_NAND_OMAP2)
-extern int gpmc_nand_init(struct omap_nand_platform_data *d,
-                         struct gpmc_timings *gpmc_t);
-#else
-static inline int gpmc_nand_init(struct omap_nand_platform_data *d,
-                                struct gpmc_timings *gpmc_t)
-{
-       return 0;
-}
-#endif
-
 #if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
 extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
 #else