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>

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)

arch/arm/mach-omap2/gpmc-nand.c

-/*
- * 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;
-}

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