diff options
| author | Roger Quadros <rogerq@kernel.org> | 2022-12-20 12:21:59 +0200 |
|---|---|---|
| committer | Dario Binacchi <dario.binacchi@amarulasolutions.com> | 2023-01-08 10:38:50 +0100 |
| commit | ff0d078942382ffdcbcfe44083427385dface1eb (patch) | |
| tree | 01bffb892afa513a3514e1d1b37d03f632e3a5db /drivers | |
| parent | dbb8711530160554823ccb8770dc6c570f482569 (diff) | |
| download | u-boot-ff0d078942382ffdcbcfe44083427385dface1eb.tar.gz | |
mtd: rawnand: omap_gpmc: support u-boot driver model
Adds driver model support.
We need to be able to self initialize the NAND controller/chip
at probe and so enable CONFIG_SYS_NAND_SELF_INIT.
Doing so requires nand_register() API which is provided by nand.c
and needs to be enabled during SPL build via CONFIG_SPL_NAND_INIT.
But nand.c also provides nand_init() so we need to get rid of nand_init()
in omap_gpmc driver if CONFIG_SPL_NAND_INIT is set.
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>
Link: https://lore.kernel.org/all/20221220102203.52398-5-rogerq@kernel.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/raw/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/omap_gpmc.c | 64 |
2 files changed, 64 insertions, 1 deletions
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index f8b79e54561..87ed4a22d64 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -253,6 +253,7 @@ config NAND_LPC32XX_SLC config NAND_OMAP_GPMC bool "Support OMAP GPMC NAND controller" depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 + select SYS_NAND_SELF_INIT if ARCH_K3 help Enables omap_gpmc.c driver for OMAPx and AMxxxx platforms. GPMC controller is used for parallel NAND flash devices, and can diff --git a/drivers/mtd/nand/raw/omap_gpmc.c b/drivers/mtd/nand/raw/omap_gpmc.c index feaa739e786..fa60c371c2d 100644 --- a/drivers/mtd/nand/raw/omap_gpmc.c +++ b/drivers/mtd/nand/raw/omap_gpmc.c @@ -7,6 +7,7 @@ #include <common.h> #include <log.h> #include <asm/io.h> +#include <dm/uclass.h> #include <linux/errno.h> #ifdef CONFIG_ARCH_OMAP2PLUS @@ -1121,7 +1122,7 @@ int __maybe_unused omap_nand_switch_ecc(uint32_t hardware, uint32_t eccstrength) * nand_scan about special functionality. See the defines for further * explanation */ -int board_nand_init(struct nand_chip *nand) +int gpmc_nand_init(struct nand_chip *nand) { int32_t gpmc_config = 0; int cs = cs_next++; @@ -1201,3 +1202,64 @@ int board_nand_init(struct nand_chip *nand) return 0; } + +/* First NAND chip for SPL use only */ +static __maybe_unused struct nand_chip *nand_chip; + +#if CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT) + +static int gpmc_nand_probe(struct udevice *dev) +{ + struct nand_chip *nand = dev_get_priv(dev); + struct mtd_info *mtd = nand_to_mtd(nand); + int ret; + + gpmc_nand_init(nand); + + ret = nand_scan(mtd, CONFIG_SYS_NAND_MAX_CHIPS); + if (ret) + return ret; + + ret = nand_register(0, mtd); + if (ret) + return ret; + + if (!nand_chip) + nand_chip = nand; + + return 0; +} + +static const struct udevice_id gpmc_nand_ids[] = { + { .compatible = "ti,am64-nand" }, + { .compatible = "ti,omap2-nand" }, + { } +}; + +U_BOOT_DRIVER(gpmc_nand) = { + .name = "gpmc-nand", + .id = UCLASS_MTD, + .of_match = gpmc_nand_ids, + .probe = gpmc_nand_probe, + .priv_auto = sizeof(struct nand_chip), +}; + +void board_nand_init(void) +{ + struct udevice *dev; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_MTD, + DM_DRIVER_GET(gpmc_nand), &dev); + if (ret && ret != -ENODEV) + pr_err("%s: Failed to get GPMC device: %d\n", __func__, ret); +} + +#else + +int board_nand_init(struct nand_chip *nand) +{ + return gpmc_nand_init(nand); +} + +#endif /* CONFIG_SYS_NAND_SELF_INIT */ |