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mtd: rawnand: omap_elm: u-boot driver model support

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Support u-boot driver model. We still retain
support legacy way of doing things if ELM_BASE
is defined in <asm/arch/hardware.h>

We could completely get rid of that if all
platforms defining ELM_BASE get rid of that definition
and enable CONFIG_SYS_NAND_SELF_INIT and are verified
to work.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Link: https://lore.kernel.org/all/20221220102203.52398-9-rogerq@kernel.org
Link: https://lore.kernel.org/all/CABGWkvrvKiVA_yaDnHJcHEKwc+pEuLdz=i6HQEY0oJQvohCUsw@mail.gmail.com
This commit is contained in:
Roger Quadros 2022-12-20 12:22:03 +02:00 committed by Dario Binacchi
parent 8993d5f2ac
commit 7363cf0581
3 changed files with 54 additions and 2 deletions
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38
drivers/mtd/nand/raw/omap_elm.c
View file

@ -15,9 +15,14 @@
#include <common.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <linux/mtd/omap_elm.h>
#include <asm/arch/hardware.h>
#include <dm.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include "omap_elm.h"
#define DRIVER_NAME "omap-elm"
#define ELM_DEFAULT_POLY (0)
@ -180,6 +185,7 @@ void elm_reset(void)
;
}
#ifdef ELM_BASE
/**
* elm_init - Initialize ELM module
*
@ -191,3 +197,33 @@ void elm_init(void)
elm_cfg = (struct elm *)ELM_BASE;
elm_reset();
}
#endif
#if CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT)
static int elm_probe(struct udevice *dev)
{
#ifndef ELM_BASE
struct resource res;
dev_read_resource(dev, 0, &res);
elm_cfg = devm_ioremap(dev, res.start, resource_size(&res));
elm_reset();
#endif
return 0;
}
static const struct udevice_id elm_ids[] = {
{ .compatible = "ti,am3352-elm" },
{ .compatible = "ti,am64-elm" },
{ }
};
U_BOOT_DRIVER(gpmc_elm) = {
.name = DRIVER_NAME,
.id = UCLASS_MTD,
.of_match = elm_ids,
.probe = elm_probe,
};
#endif /* CONFIG_SYS_NAND_SELF_INIT */

6
include/linux/mtd/omap_elm.h → drivers/mtd/nand/raw/omap_elm.h
View file

@ -74,6 +74,12 @@ int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count,
u32 *error_locations);
int elm_config(enum bch_level level);
void elm_reset(void);
#ifdef ELM_BASE
void elm_init(void);
#else
static inline void elm_init(void)
{
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARCH_ELM_H */

12
drivers/mtd/nand/raw/omap_gpmc.c
View file

@ -20,7 +20,8 @@
#include <linux/bch.h>
#include <linux/compiler.h>
#include <nand.h>
#include <linux/mtd/omap_elm.h>
#include "omap_elm.h"
#ifndef GPMC_MAX_CS
#define GPMC_MAX_CS 4
@ -1249,6 +1250,15 @@ void board_nand_init(void)
struct udevice *dev;
int ret;
#ifdef CONFIG_NAND_OMAP_ELM
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_DRIVER_GET(gpmc_elm), &dev);
if (ret && ret != -ENODEV) {
pr_err("%s: Failed to get ELM device: %d\n", __func__, ret);
return;
}
#endif
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_DRIVER_GET(gpmc_nand), &dev);
if (ret && ret != -ENODEV)