From 9345943b2b5ea890cb479770c3c802cf851ed3e6 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan.agner@toradex.com>
Date: Fri, 22 Jun 2018 17:19:46 +0200
Subject: [PATCH] mtd: nand: mxs_nand: introduce SPL specific init

In preparation to convert the driver to use NAND self init
provide a new minimal init for SPL builds. As a side effect
this also reduces size of SPL by about 4KiB.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
---
 drivers/mtd/nand/mxs_nand.c     | 43 +++++++++++++++++++++++++++++++++
 drivers/mtd/nand/mxs_nand.h     | 10 ++++++++
 drivers/mtd/nand/mxs_nand_spl.c |  3 ++-
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mtd/nand/mxs_nand.h

diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c
index b9ffa7cbae..5b7ad18c42 100644
--- a/drivers/mtd/nand/mxs_nand.c
+++ b/drivers/mtd/nand/mxs_nand.c
@@ -25,6 +25,7 @@
 #include <asm/mach-imx/regs-gpmi.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/mach-imx/dma.h>
+#include "mxs_nand.h"
 
 #define	MXS_NAND_DMA_DESCRIPTOR_COUNT		4
 
@@ -1149,6 +1150,48 @@ err1:
 	return ret;
 }
 
+int mxs_nand_init_spl(struct nand_chip *nand)
+{
+	struct mxs_nand_info *nand_info;
+	int err;
+
+	nand_info = malloc(sizeof(struct mxs_nand_info));
+	if (!nand_info) {
+		printf("MXS NAND: Failed to allocate private data\n");
+		return -ENOMEM;
+	}
+	memset(nand_info, 0, sizeof(struct mxs_nand_info));
+
+	err = mxs_nand_alloc_buffers(nand_info);
+	if (err)
+		return err;
+
+	err = mxs_nand_init(nand_info);
+	if (err)
+		return err;
+
+	nand_set_controller_data(nand, nand_info);
+
+	nand->options |= NAND_NO_SUBPAGE_WRITE;
+
+	nand->cmd_ctrl		= mxs_nand_cmd_ctrl;
+	nand->dev_ready		= mxs_nand_device_ready;
+	nand->select_chip	= mxs_nand_select_chip;
+	nand->scan_bbt		= mxs_nand_scan_bbt;
+
+	nand->read_byte		= mxs_nand_read_byte;
+	nand->read_buf		= mxs_nand_read_buf;
+
+	nand->ecc.read_page	= mxs_nand_ecc_read_page;
+
+	nand->ecc.mode		= NAND_ECC_HW;
+	nand->ecc.bytes		= 9;
+	nand->ecc.size		= 512;
+	nand->ecc.strength	= 8;
+
+	return 0;
+}
+
 /*!
  * This function is called during the driver binding process.
  *
diff --git a/drivers/mtd/nand/mxs_nand.h b/drivers/mtd/nand/mxs_nand.h
new file mode 100644
index 0000000000..9bb7148d98
--- /dev/null
+++ b/drivers/mtd/nand/mxs_nand.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * NXP GPMI NAND flash driver
+ *
+ * Copyright (C) 2018 Toradex
+ * Authors:
+ * Stefan Agner <stefan.agner@toradex.com>
+ */
+
+int mxs_nand_init_spl(struct nand_chip *nand);
diff --git a/drivers/mtd/nand/mxs_nand_spl.c b/drivers/mtd/nand/mxs_nand_spl.c
index 3e8b35f04a..47857a81bc 100644
--- a/drivers/mtd/nand/mxs_nand_spl.c
+++ b/drivers/mtd/nand/mxs_nand_spl.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <nand.h>
 #include <malloc.h>
+#include "mxs_nand.h"
 
 static struct mtd_info *mtd;
 static struct nand_chip nand_chip;
@@ -145,7 +146,7 @@ static int mxs_nand_init(void)
 		return 0;
 
 	/* init mxs nand driver */
-	board_nand_init(&nand_chip);
+	mxs_nand_init_spl(&nand_chip);
 	mtd = nand_to_mtd(&nand_chip);
 	/* set mtd functions */
 	nand_chip.cmdfunc = mxs_nand_command;
-- 
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