mtd: rawnand: fsl_elbc: Add device tree support

This allows boards to specify NAND settings via standard DT properties.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 1eab21e..d75f371 100644 (file)
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -158,6 +158,10 @@ config NAND_FSL_ELBC
        help
          Enable the Freescale Enhanced Local Bus Controller FCM NAND driver.
 
+config NAND_FSL_ELBC_DT
+       bool "Support Freescale Enhanced Local Bus Controller FCM NAND driver (DT mode)"
+       depends on NAND_FSL_ELBC
+
 config NAND_FSL_IFC
        bool "Support Freescale Integrated Flash Controller NAND driver"
        select TPL_SYS_NAND_SELF_INIT if TPL_NAND_SUPPORT

diff --git a/drivers/mtd/nand/raw/fsl_elbc_nand.c b/drivers/mtd/nand/raw/fsl_elbc_nand.c
index f8698ec..f8d2bdf 100644 (file)
--- a/drivers/mtd/nand/raw/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_elbc_nand.c
@@ -20,6 +20,10 @@
 #include <asm/io.h>
 #include <linux/errno.h>
 
+#ifdef CONFIG_NAND_FSL_ELBC_DT
+#include <dm/read.h>
+#endif
+
 #ifdef VERBOSE_DEBUG
 #define DEBUG_ELBC
 #define vdbg(format, arg...) printf("DEBUG: " format, ##arg)
@@ -664,7 +668,7 @@ static void fsl_elbc_ctrl_init(void)
        elbc_ctrl->addr = NULL;
 }
 
-static int fsl_elbc_chip_init(int devnum, u8 *addr)
+static int fsl_elbc_chip_init(int devnum, u8 *addr, ofnode flash_node)
 {
        struct mtd_info *mtd;
        struct nand_chip *nand;
@@ -712,6 +716,8 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr)
        elbc_ctrl->chips[priv->bank] = priv;
 
        /* fill in nand_chip structure */
+       nand->flash_node = flash_node;
+
        /* set up function call table */
        nand->read_byte = fsl_elbc_read_byte;
        nand->write_buf = fsl_elbc_write_buf;
@@ -804,6 +810,8 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr)
        return 0;
 }
 
+#ifndef CONFIG_NAND_FSL_ELBC_DT
+
 #ifndef CONFIG_SYS_NAND_BASE_LIST
 #define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
 #endif
@@ -816,5 +824,35 @@ void board_nand_init(void)
        int i;
 
        for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
-               fsl_elbc_chip_init(i, (u8 *)base_address[i]);
+               fsl_elbc_chip_init(i, (u8 *)base_address[i], ofnode_null());
+}
+
+#else
+
+static int fsl_elbc_nand_probe(struct udevice *dev)
+{
+       return fsl_elbc_chip_init(0, (void *)dev_read_addr(dev), dev_ofnode(dev));
+}
+
+static const struct udevice_id fsl_elbc_nand_dt_ids[] = {
+       { .compatible = "fsl,elbc-fcm-nand", },
+       {}
+};
+
+U_BOOT_DRIVER(fsl_elbc_nand) = {
+       .name = "fsl_elbc_nand",
+       .id = UCLASS_MTD,
+       .of_match = fsl_elbc_nand_dt_ids,
+       .probe = fsl_elbc_nand_probe,
+};
+
+void board_nand_init(void)
+{
+       struct udevice *dev;
+       int ret;
+
+       ret = uclass_get_device_by_driver(UCLASS_MTD, DM_DRIVER_GET(fsl_elbc_nand), &dev);
+       if (ret && ret != -ENODEV)
+               printf("Failed to initialize fsl_elbc_nand NAND controller. (error %d)\n", ret);
 }
+#endif