Merge tag 'nand/for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux into mtd/for-5.4

NAND core
* Fixing typos
* Adding missing of_node_put() in various drivers

Raw NAND controller drivers:
* Macronix: new controller driver
* Omap2: Fixing the number of bitflips returned
* Brcmnand: Fix a pointer not iterating over all the page chunks
* W90x900: Driver removed
* Onenand: Fix a memory leak
* Sharpsl: Missing include guard
* STM32: Avoid warnings when building with W=1
* Ingenic: Fix a coccinelle warning
* r852: Call a helper to simplify the code

15 files changed, 642 insertions, 389 deletions

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 5a711d8beaca..e59de3f60cf6 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -351,14 +351,6 @@ config MTD_NAND_SOCRATES
 	help
 	  Enables support for NAND Flash chips wired onto Socrates board.
 
-config MTD_NAND_NUC900
-	tristate "Nuvoton NUC9xx/w90p910 NAND controller"
-	depends on ARCH_W90X900 || COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  This enables the driver for the NAND Flash on evaluation board based
-	  on w90p910 / NUC9xx.
-
 source "drivers/mtd/nand/raw/ingenic/Kconfig"
 
 config MTD_NAND_FSMC
@@ -407,6 +399,12 @@ config MTD_NAND_MTK
 	  Enables support for NAND controller on MTK SoCs.
 	  This controller is found on mt27xx, mt81xx, mt65xx SoCs.
 
+config MTD_NAND_MXIC
+	tristate "Macronix raw NAND controller"
+	depends on HAS_IOMEM || COMPILE_TEST
+	help
+	  This selects the Macronix raw NAND controller driver.
+
 config MTD_NAND_TEGRA
 	tristate "NVIDIA Tegra NAND controller"
 	depends on ARCH_TEGRA || COMPILE_TEST
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index efaf5cd25edc..a98721988e61 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -41,7 +41,6 @@ obj-$(CONFIG_MTD_NAND_SH_FLCTL)		+= sh_flctl.o
 obj-$(CONFIG_MTD_NAND_MXC)		+= mxc_nand.o
 obj-$(CONFIG_MTD_NAND_SOCRATES)		+= socrates_nand.o
 obj-$(CONFIG_MTD_NAND_TXX9NDFMC)	+= txx9ndfmc.o
-obj-$(CONFIG_MTD_NAND_NUC900)		+= nuc900_nand.o
 obj-$(CONFIG_MTD_NAND_MPC5121_NFC)	+= mpc5121_nfc.o
 obj-$(CONFIG_MTD_NAND_VF610_NFC)	+= vf610_nfc.o
 obj-$(CONFIG_MTD_NAND_RICOH)		+= r852.o
@@ -54,6 +53,7 @@ obj-$(CONFIG_MTD_NAND_HISI504)	        += hisi504_nand.o
 obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= brcmnand/
 obj-$(CONFIG_MTD_NAND_QCOM)		+= qcom_nandc.o
 obj-$(CONFIG_MTD_NAND_MTK)		+= mtk_ecc.o mtk_nand.o
+obj-$(CONFIG_MTD_NAND_MXIC)		+= mxic_nand.o
 obj-$(CONFIG_MTD_NAND_TEGRA)		+= tegra_nand.o
 obj-$(CONFIG_MTD_NAND_STM32_FMC2)	+= stm32_fmc2_nand.o
 obj-$(CONFIG_MTD_NAND_MESON)		+= meson_nand.o
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index 33310b8a6eb8..15ef30b368a5 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -1792,6 +1792,7 @@ static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd,
 	int bitflips = 0;
 	int page = addr >> chip->page_shift;
 	int ret;
+	void *ecc_chunk;
 
 	if (!buf)
 		buf = nand_get_data_buf(chip);
@@ -1804,7 +1805,9 @@ static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd,
 		return ret;
 
 	for (i = 0; i < chip->ecc.steps; i++, oob += sas) {
-		ret = nand_check_erased_ecc_chunk(buf, chip->ecc.size,
+		ecc_chunk = buf + chip->ecc.size * i;
+		ret = nand_check_erased_ecc_chunk(ecc_chunk,
+						  chip->ecc.size,
 						  oob, sas, NULL, 0,
 						  chip->ecc.strength);
 		if (ret < 0)
diff --git a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
index d7b7c0f13909..49afebee50db 100644
--- a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
+++ b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
@@ -310,7 +310,6 @@ static int ingenic_nand_init_chip(struct platform_device *pdev,
 	struct device *dev = &pdev->dev;
 	struct ingenic_nand *nand;
 	struct ingenic_nand_cs *cs;
-	struct resource *res;
 	struct nand_chip *chip;
 	struct mtd_info *mtd;
 	const __be32 *reg;
@@ -326,8 +325,7 @@ static int ingenic_nand_init_chip(struct platform_device *pdev,
 
 	jz4780_nemc_set_type(nfc->dev, cs->bank, JZ4780_NEMC_BANK_NAND);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, chipnr);
-	cs->base = devm_ioremap_resource(dev, res);
+	cs->base = devm_platform_ioremap_resource(pdev, chipnr);
 	if (IS_ERR(cs->base))
 		return PTR_ERR(cs->base);
 
@@ -418,6 +416,7 @@ static int ingenic_nand_init_chips(struct ingenic_nfc *nfc,
 		ret = ingenic_nand_init_chip(pdev, nfc, np, i);
 		if (ret) {
 			ingenic_nand_cleanup_chips(nfc);
+			of_node_put(np);
 			return ret;
 		}
 
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index ea57ddcec41e..1b82b687e5a5 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -1320,6 +1320,7 @@ static int meson_nfc_nand_chips_init(struct device *dev,
 		ret = meson_nfc_nand_chip_init(dev, nfc, nand_np);
 		if (ret) {
 			meson_nfc_nand_chip_cleanup(nfc);
+			of_node_put(nand_np);
 			return ret;
 		}
 	}
diff --git a/drivers/mtd/nand/raw/mxic_nand.c b/drivers/mtd/nand/raw/mxic_nand.c
new file mode 100644
index 000000000000..9d49e6c845e1
--- /dev/null
+++ b/drivers/mtd/nand/raw/mxic_nand.c
@@ -0,0 +1,582 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Macronix International Co., Ltd.
+ *
+ * Author:
+ *	Mason Yang <masonccyang@mxic.com.tw>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/platform_device.h>
+
+#include "internals.h"
+
+#define HC_CFG			0x0
+#define HC_CFG_IF_CFG(x)	((x) << 27)
+#define HC_CFG_DUAL_SLAVE	BIT(31)
+#define HC_CFG_INDIVIDUAL	BIT(30)
+#define HC_CFG_NIO(x)		(((x) / 4) << 27)
+#define HC_CFG_TYPE(s, t)	((t) << (23 + ((s) * 2)))
+#define HC_CFG_TYPE_SPI_NOR	0
+#define HC_CFG_TYPE_SPI_NAND	1
+#define HC_CFG_TYPE_SPI_RAM	2
+#define HC_CFG_TYPE_RAW_NAND	3
+#define HC_CFG_SLV_ACT(x)	((x) << 21)
+#define HC_CFG_CLK_PH_EN	BIT(20)
+#define HC_CFG_CLK_POL_INV	BIT(19)
+#define HC_CFG_BIG_ENDIAN	BIT(18)
+#define HC_CFG_DATA_PASS	BIT(17)
+#define HC_CFG_IDLE_SIO_LVL(x)	((x) << 16)
+#define HC_CFG_MAN_START_EN	BIT(3)
+#define HC_CFG_MAN_START	BIT(2)
+#define HC_CFG_MAN_CS_EN	BIT(1)
+#define HC_CFG_MAN_CS_ASSERT	BIT(0)
+
+#define INT_STS			0x4
+#define INT_STS_EN		0x8
+#define INT_SIG_EN		0xc
+#define INT_STS_ALL		GENMASK(31, 0)
+#define INT_RDY_PIN		BIT(26)
+#define INT_RDY_SR		BIT(25)
+#define INT_LNR_SUSP		BIT(24)
+#define INT_ECC_ERR		BIT(17)
+#define INT_CRC_ERR		BIT(16)
+#define INT_LWR_DIS		BIT(12)
+#define INT_LRD_DIS		BIT(11)
+#define INT_SDMA_INT		BIT(10)
+#define INT_DMA_FINISH		BIT(9)
+#define INT_RX_NOT_FULL		BIT(3)
+#define INT_RX_NOT_EMPTY	BIT(2)
+#define INT_TX_NOT_FULL		BIT(1)
+#define INT_TX_EMPTY		BIT(0)
+
+#define HC_EN			0x10
+#define HC_EN_BIT		BIT(0)
+
+#define TXD(x)			(0x14 + ((x) * 4))
+#define RXD			0x24
+
+#define SS_CTRL(s)		(0x30 + ((s) * 4))
+#define LRD_CFG			0x44
+#define LWR_CFG			0x80
+#define RWW_CFG			0x70
+#define OP_READ			BIT(23)
+#define OP_DUMMY_CYC(x)		((x) << 17)
+#define OP_ADDR_BYTES(x)	((x) << 14)
+#define OP_CMD_BYTES(x)		(((x) - 1) << 13)
+#define OP_OCTA_CRC_EN		BIT(12)
+#define OP_DQS_EN		BIT(11)
+#define OP_ENHC_EN		BIT(10)
+#define OP_PREAMBLE_EN		BIT(9)
+#define OP_DATA_DDR		BIT(8)
+#define OP_DATA_BUSW(x)		((x) << 6)
+#define OP_ADDR_DDR		BIT(5)
+#define OP_ADDR_BUSW(x)		((x) << 3)
+#define OP_CMD_DDR		BIT(2)
+#define OP_CMD_BUSW(x)		(x)
+#define OP_BUSW_1		0
+#define OP_BUSW_2		1
+#define OP_BUSW_4		2
+#define OP_BUSW_8		3
+
+#define OCTA_CRC		0x38
+#define OCTA_CRC_IN_EN(s)	BIT(3 + ((s) * 16))
+#define OCTA_CRC_CHUNK(s, x)	((fls((x) / 32)) << (1 + ((s) * 16)))
+#define OCTA_CRC_OUT_EN(s)	BIT(0 + ((s) * 16))
+
+#define ONFI_DIN_CNT(s)		(0x3c + (s))
+
+#define LRD_CTRL		0x48
+#define RWW_CTRL		0x74
+#define LWR_CTRL		0x84
+#define LMODE_EN		BIT(31)
+#define LMODE_SLV_ACT(x)	((x) << 21)
+#define LMODE_CMD1(x)		((x) << 8)
+#define LMODE_CMD0(x)		(x)
+
+#define LRD_ADDR		0x4c
+#define LWR_ADDR		0x88
+#define LRD_RANGE		0x50
+#define LWR_RANGE		0x8c
+
+#define AXI_SLV_ADDR		0x54
+
+#define DMAC_RD_CFG		0x58
+#define DMAC_WR_CFG		0x94
+#define DMAC_CFG_PERIPH_EN	BIT(31)
+#define DMAC_CFG_ALLFLUSH_EN	BIT(30)
+#define DMAC_CFG_LASTFLUSH_EN	BIT(29)
+#define DMAC_CFG_QE(x)		(((x) + 1) << 16)
+#define DMAC_CFG_BURST_LEN(x)	(((x) + 1) << 12)
+#define DMAC_CFG_BURST_SZ(x)	((x) << 8)
+#define DMAC_CFG_DIR_READ	BIT(1)
+#define DMAC_CFG_START		BIT(0)
+
+#define DMAC_RD_CNT		0x5c
+#define DMAC_WR_CNT		0x98
+
+#define SDMA_ADDR		0x60
+
+#define DMAM_CFG		0x64
+#define DMAM_CFG_START		BIT(31)
+#define DMAM_CFG_CONT		BIT(30)
+#define DMAM_CFG_SDMA_GAP(x)	(fls((x) / 8192) << 2)
+#define DMAM_CFG_DIR_READ	BIT(1)
+#define DMAM_CFG_EN		BIT(0)
+
+#define DMAM_CNT		0x68
+
+#define LNR_TIMER_TH		0x6c
+
+#define RDM_CFG0		0x78
+#define RDM_CFG0_POLY(x)	(x)
+
+#define RDM_CFG1		0x7c
+#define RDM_CFG1_RDM_EN		BIT(31)
+#define RDM_CFG1_SEED(x)	(x)
+
+#define LWR_SUSP_CTRL		0x90
+#define LWR_SUSP_CTRL_EN	BIT(31)
+
+#define DMAS_CTRL		0x9c
+#define DMAS_CTRL_EN		BIT(31)
+#define DMAS_CTRL_DIR_READ	BIT(30)
+
+#define DATA_STROB		0xa0
+#define DATA_STROB_EDO_EN	BIT(2)
+#define DATA_STROB_INV_POL	BIT(1)
+#define DATA_STROB_DELAY_2CYC	BIT(0)
+
+#define IDLY_CODE(x)		(0xa4 + ((x) * 4))
+#define IDLY_CODE_VAL(x, v)	((v) << (((x) % 4) * 8))
+
+#define GPIO			0xc4
+#define GPIO_PT(x)		BIT(3 + ((x) * 16))
+#define GPIO_RESET(x)		BIT(2 + ((x) * 16))
+#define GPIO_HOLDB(x)		BIT(1 + ((x) * 16))
+#define GPIO_WPB(x)		BIT((x) * 16)
+
+#define HC_VER			0xd0
+
+#define HW_TEST(x)		(0xe0 + ((x) * 4))
+
+#define MXIC_NFC_MAX_CLK_HZ	50000000
+#define IRQ_TIMEOUT		1000
+
+struct mxic_nand_ctlr {
+	struct clk *ps_clk;
+	struct clk *send_clk;
+	struct clk *send_dly_clk;
+	struct completion complete;
+	void __iomem *regs;
+	struct nand_controller controller;
+	struct device *dev;
+	struct nand_chip chip;
+};
+
+static int mxic_nfc_clk_enable(struct mxic_nand_ctlr *nfc)
+{
+	int ret;
+
+	ret = clk_prepare_enable(nfc->ps_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(nfc->send_clk);
+	if (ret)
+		goto err_ps_clk;
+
+	ret = clk_prepare_enable(nfc->send_dly_clk);
+	if (ret)
+		goto err_send_dly_clk;
+
+	return ret;
+
+err_send_dly_clk:
+	clk_disable_unprepare(nfc->send_clk);
+err_ps_clk:
+	clk_disable_unprepare(nfc->ps_clk);
+
+	return ret;
+}
+
+static void mxic_nfc_clk_disable(struct mxic_nand_ctlr *nfc)
+{
+	clk_disable_unprepare(nfc->send_clk);
+	clk_disable_unprepare(nfc->send_dly_clk);
+	clk_disable_unprepare(nfc->ps_clk);
+}
+
+static void mxic_nfc_set_input_delay(struct mxic_nand_ctlr *nfc, u8 idly_code)
+{
+	writel(IDLY_CODE_VAL(0, idly_code) |
+	       IDLY_CODE_VAL(1, idly_code) |
+	       IDLY_CODE_VAL(2, idly_code) |
+	       IDLY_CODE_VAL(3, idly_code),
+	       nfc->regs + IDLY_CODE(0));
+	writel(IDLY_CODE_VAL(4, idly_code) |
+	       IDLY_CODE_VAL(5, idly_code) |
+	       IDLY_CODE_VAL(6, idly_code) |
+	       IDLY_CODE_VAL(7, idly_code),
+	       nfc->regs + IDLY_CODE(1));
+}
+
+static int mxic_nfc_clk_setup(struct mxic_nand_ctlr *nfc, unsigned long freq)
+{
+	int ret;
+
+	ret = clk_set_rate(nfc->send_clk, freq);
+	if (ret)
+		return ret;
+
+	ret = clk_set_rate(nfc->send_dly_clk, freq);
+	if (ret)
+		return ret;
+
+	/*
+	 * A constant delay range from 0x0 ~ 0x1F for input delay,
+	 * the unit is 78 ps, the max input delay is 2.418 ns.
+	 */
+	mxic_nfc_set_input_delay(nfc, 0xf);
+
+	/*
+	 * Phase degree = 360 * freq * output-delay
+	 * where output-delay is a constant value 1 ns in FPGA.
+	 *
+	 * Get Phase degree = 360 * freq * 1 ns
+	 *                  = 360 * freq * 1 sec / 1000000000
+	 *                  = 9 * freq / 25000000
+	 */
+	ret = clk_set_phase(nfc->send_dly_clk, 9 * freq / 25000000);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int mxic_nfc_set_freq(struct mxic_nand_ctlr *nfc, unsigned long freq)
+{
+	int ret;
+
+	if (freq > MXIC_NFC_MAX_CLK_HZ)
+		freq = MXIC_NFC_MAX_CLK_HZ;
+
+	mxic_nfc_clk_disable(nfc);
+	ret = mxic_nfc_clk_setup(nfc, freq);
+	if (ret)
+		return ret;
+
+	ret = mxic_nfc_clk_enable(nfc);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static irqreturn_t mxic_nfc_isr(int irq, void *dev_id)
+{
+	struct mxic_nand_ctlr *nfc = dev_id;
+	u32 sts;
+
+	sts = readl(nfc->regs + INT_STS);
+	if (sts & INT_RDY_PIN)
+		complete(&nfc->complete);
+	else
+		return IRQ_NONE;
+
+	return IRQ_HANDLED;
+}
+
+static void mxic_nfc_hw_init(struct mxic_nand_ctlr *nfc)
+{
+	writel(HC_CFG_NIO(8) | HC_CFG_TYPE(1, HC_CFG_TYPE_RAW_NAND) |
+	       HC_CFG_SLV_ACT(0) | HC_CFG_MAN_CS_EN |
+	       HC_CFG_IDLE_SIO_LVL(1), nfc->regs + HC_CFG);
+	writel(INT_STS_ALL, nfc->regs + INT_STS_EN);
+	writel(INT_RDY_PIN, nfc->regs + INT_SIG_EN);
+	writel(0x0, nfc->regs + ONFI_DIN_CNT(0));
+	writel(0, nfc->regs + LRD_CFG);
+	writel(0, nfc->regs + LRD_CTRL);
+	writel(0x0, nfc->regs + HC_EN);
+}
+
+static void mxic_nfc_cs_enable(struct mxic_nand_ctlr *nfc)
+{
+	writel(readl(nfc->regs + HC_CFG) | HC_CFG_MAN_CS_EN,
+	       nfc->regs + HC_CFG);
+	writel(HC_CFG_MAN_CS_ASSERT | readl(nfc->regs + HC_CFG),
+	       nfc->regs + HC_CFG);
+}
+
+static void mxic_nfc_cs_disable(struct mxic_nand_ctlr *nfc)
+{
+	writel(~HC_CFG_MAN_CS_ASSERT & readl(nfc->regs + HC_CFG),
+	       nfc->regs + HC_CFG);
+}
+
+static int  mxic_nfc_wait_ready(struct nand_chip *chip)
+{
+	struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+	int ret;
+
+	ret = wait_for_completion_timeout(&nfc->complete,
+					  msecs_to_jiffies(IRQ_TIMEOUT));
+	if (!ret) {
+		dev_err(nfc->dev, "nand device timeout\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int mxic_nfc_data_xfer(struct mxic_nand_ctlr *nfc, const void *txbuf,
+			      void *rxbuf, unsigned int len)
+{
+	unsigned int pos = 0;
+
+	while (pos < len) {
+		unsigned int nbytes = len - pos;
+		u32 data = 0xffffffff;
+		u32 sts;
+		int ret;
+
+		if (nbytes > 4)
+			nbytes = 4;
+
+		if (txbuf)
+			memcpy(&data, txbuf + pos, nbytes);
+
+		ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+					 sts & INT_TX_EMPTY, 0, USEC_PER_SEC);
+		if (ret)
+			return ret;
+
+		writel(data, nfc->regs + TXD(nbytes % 4));
+
+		ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+					 sts & INT_TX_EMPTY, 0, USEC_PER_SEC);
+		if (ret)
+			return ret;
+
+		ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+					 sts & INT_RX_NOT_EMPTY, 0,
+					 USEC_PER_SEC);
+		if (ret)
+			return ret;
+
+		data = readl(nfc->regs + RXD);
+		if (rxbuf) {
+			data >>= (8 * (4 - nbytes));
+			memcpy(rxbuf + pos, &data, nbytes);
+		}
+		if (readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY)
+			dev_warn(nfc->dev, "RX FIFO not empty\n");
+
+		pos += nbytes;
+	}
+
+	return 0;
+}
+
+static int mxic_nfc_exec_op(struct nand_chip *chip,
+			    const struct nand_operation *op, bool check_only)
+{
+	struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+	const struct nand_op_instr *instr = NULL;
+	int ret = 0;
+	unsigned int op_id;
+
+	mxic_nfc_cs_enable(nfc);
+	init_completion(&nfc->complete);
+	for (op_id = 0; op_id < op->ninstrs; op_id++) {
+		instr = &op->instrs[op_id];
+
+		switch (instr->type) {
+		case NAND_OP_CMD_INSTR:
+			writel(0, nfc->regs + HC_EN);
+			writel(HC_EN_BIT, nfc->regs + HC_EN);
+			writel(OP_CMD_BUSW(OP_BUSW_8) |  OP_DUMMY_CYC(0x3F) |
+			       OP_CMD_BYTES(0), nfc->regs + SS_CTRL(0));
+
+			ret = mxic_nfc_data_xfer(nfc,
+						 &instr->ctx.cmd.opcode,
+						 NULL, 1);
+			break;
+
+		case NAND_OP_ADDR_INSTR:
+			writel(OP_ADDR_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+			       OP_ADDR_BYTES(instr->ctx.addr.naddrs),
+			       nfc->regs + SS_CTRL(0));
+			ret = mxic_nfc_data_xfer(nfc,
+						 instr->ctx.addr.addrs, NULL,
+						 instr->ctx.addr.naddrs);
+			break;
+
+		case NAND_OP_DATA_IN_INSTR:
+			writel(0x0, nfc->regs + ONFI_DIN_CNT(0));
+			writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+			       OP_READ, nfc->regs + SS_CTRL(0));
+			ret = mxic_nfc_data_xfer(nfc, NULL,
+						 instr->ctx.data.buf.in,
+						 instr->ctx.data.len);
+			break;
+
+		case NAND_OP_DATA_OUT_INSTR:
+			writel(instr->ctx.data.len,
+			       nfc->regs + ONFI_DIN_CNT(0));
+			writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F),
+			       nfc->regs + SS_CTRL(0));
+			ret = mxic_nfc_data_xfer(nfc,
+						 instr->ctx.data.buf.out, NULL,
+						 instr->ctx.data.len);
+			break;
+
+		case NAND_OP_WAITRDY_INSTR:
+			ret = mxic_nfc_wait_ready(chip);
+			break;
+		}
+	}
+	mxic_nfc_cs_disable(nfc);
+
+	return ret;
+}
+
+static int mxic_nfc_setup_data_interface(struct nand_chip *chip, int chipnr,
+					 const struct nand_data_interface *conf)
+{
+	struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+	const struct nand_sdr_timings *sdr;
+	unsigned long freq;
+	int ret;
+
+	sdr = nand_get_sdr_timings(conf);
+	if (IS_ERR(sdr))
+		return PTR_ERR(sdr);
+
+	if (chipnr == NAND_DATA_IFACE_CHECK_ONLY)
+		return 0;
+
+	freq = NSEC_PER_SEC / (sdr->tRC_min / 1000);
+
+	ret =  mxic_nfc_set_freq(nfc, freq);
+	if (ret)
+		dev_err(nfc->dev, "set freq:%ld failed\n", freq);
+
+	if (sdr->tRC_min < 30000)
+		writel(DATA_STROB_EDO_EN, nfc->regs + DATA_STROB);
+
+	return 0;
+}
+
+static const struct nand_controller_ops mxic_nand_controller_ops = {
+	.exec_op = mxic_nfc_exec_op,
+	.setup_data_interface = mxic_nfc_setup_data_interface,
+};
+
+static int mxic_nfc_probe(struct platform_device *pdev)
+{
+	struct device_node *nand_np, *np = pdev->dev.of_node;
+	struct mtd_info *mtd;
+	struct mxic_nand_ctlr *nfc;
+	struct nand_chip *nand_chip;
+	int err;
+	int irq;
+
+	nfc = devm_kzalloc(&pdev->dev, sizeof(struct mxic_nand_ctlr),
+			   GFP_KERNEL);
+	if (!nfc)
+		return -ENOMEM;
+
+	nfc->ps_clk = devm_clk_get(&pdev->dev, "ps");
+	if (IS_ERR(nfc->ps_clk))
+		return PTR_ERR(nfc->ps_clk);
+
+	nfc->send_clk = devm_clk_get(&pdev->dev, "send");
+	if (IS_ERR(nfc->send_clk))
+		return PTR_ERR(nfc->send_clk);
+
+	nfc->send_dly_clk = devm_clk_get(&pdev->dev, "send_dly");
+	if (IS_ERR(nfc->send_dly_clk))
+		return PTR_ERR(nfc->send_dly_clk);
+
+	nfc->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(nfc->regs))
+		return PTR_ERR(nfc->regs);
+
+	nand_chip = &nfc->chip;
+	mtd = nand_to_mtd(nand_chip);
+	mtd->dev.parent = &pdev->dev;
+
+	for_each_child_of_node(np, nand_np)
+		nand_set_flash_node(nand_chip, nand_np);
+
+	nand_chip->priv = nfc;
+	nfc->dev = &pdev->dev;
+	nfc->controller.ops = &mxic_nand_controller_ops;
+	nand_controller_init(&nfc->controller);
+	nand_chip->controller = &nfc->controller;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "failed to retrieve irq\n");
+		return irq;
+	}
+
+	mxic_nfc_hw_init(nfc);
+
+	err = devm_request_irq(&pdev->dev, irq, mxic_nfc_isr,
+			       0, "mxic-nfc", nfc);
+	if (err)
+		goto fail;
+
+	err = nand_scan(nand_chip, 1);
+	if (err)
+		goto fail;
+
+	err = mtd_device_register(mtd, NULL, 0);
+	if (err)
+		goto fail;
+
+	platform_set_drvdata(pdev, nfc);
+	return 0;
+
+fail:
+	mxic_nfc_clk_disable(nfc);
+	return err;
+}
+
+static int mxic_nfc_remove(struct platform_device *pdev)
+{
+	struct mxic_nand_ctlr *nfc = platform_get_drvdata(pdev);
+
+	nand_release(&nfc->chip);
+	mxic_nfc_clk_disable(nfc);
+	return 0;
+}
+
+static const struct of_device_id mxic_nfc_of_ids[] = {
+	{ .compatible = "mxic,multi-itfc-v009-nand-controller", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mxic_nfc_of_ids);
+
+static struct platform_driver mxic_nfc_driver = {
+	.probe = mxic_nfc_probe,
+	.remove = mxic_nfc_remove,
+	.driver = {
+		.name = "mxic-nfc",
+		.of_match_table = mxic_nfc_of_ids,
+	},
+};
+module_platform_driver(mxic_nfc_driver);
+
+MODULE_AUTHOR("Mason Yang <masonccyang@mxic.com.tw>");
+MODULE_DESCRIPTION("Macronix raw NAND controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 91f046d4d452..5c2c30a7dffa 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4112,7 +4112,7 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to,
 			  struct mtd_oob_ops *ops)
 {
 	struct nand_chip *chip = mtd_to_nand(mtd);
-	int ret = -ENOTSUPP;
+	int ret;
 
 	ops->retlen = 0;
 
diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
index 2ef15ef94525..96045d60471e 100644
--- a/drivers/mtd/nand/raw/nand_bbt.c
+++ b/drivers/mtd/nand/raw/nand_bbt.c
@@ -1232,7 +1232,7 @@ static int nand_scan_bbt(struct nand_chip *this, struct nand_bbt_descr *bd)
 	if (!td) {
 		if ((res = nand_memory_bbt(this, bd))) {
 			pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n");
-			goto err;
+			goto err_free_bbt;
 		}
 		return 0;
 	}
@@ -1245,7 +1245,7 @@ static int nand_scan_bbt(struct nand_chip *this, struct nand_bbt_descr *bd)
 	buf = vmalloc(len);
 	if (!buf) {
 		res = -ENOMEM;
-		goto err;
+		goto err_free_bbt;
 	}
 
 	/* Is the bbt at a given page? */
@@ -1258,7 +1258,7 @@ static int nand_scan_bbt(struct nand_chip *this, struct nand_bbt_descr *bd)
 
 	res = check_create(this, buf, bd);
 	if (res)
-		goto err;
+		goto err_free_buf;
 
 	/* Prevent the bbt regions from erasing / writing */
 	mark_bbt_region(this, td);
@@ -1268,7 +1268,9 @@ static int nand_scan_bbt(struct nand_chip *this, struct nand_bbt_descr *bd)
 	vfree(buf);
 	return 0;
 
-err:
+err_free_buf:
+	vfree(buf);
+err_free_bbt:
 	kfree(this->bbt);
 	this->bbt = NULL;
 	return res;
diff --git a/drivers/mtd/nand/raw/nuc900_nand.c b/drivers/mtd/nand/raw/nuc900_nand.c
deleted file mode 100644
index 13bf7b2894d3..000000000000
--- a/drivers/mtd/nand/raw/nuc900_nand.c
+++ /dev/null
@@ -1,304 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright © 2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/rawnand.h>
-#include <linux/mtd/partitions.h>
-
-#define REG_FMICSR   	0x00
-#define REG_SMCSR    	0xa0
-#define REG_SMISR    	0xac
-#define REG_SMCMD    	0xb0
-#define REG_SMADDR   	0xb4
-#define REG_SMDATA   	0xb8
-
-#define RESET_FMI	0x01
-#define NAND_EN		0x08
-#define READYBUSY	(0x01 << 18)
-
-#define SWRST		0x01
-#define PSIZE		(0x01 << 3)
-#define DMARWEN		(0x03 << 1)
-#define BUSWID		(0x01 << 4)
-#define ECC4EN		(0x01 << 5)
-#define WP		(0x01 << 24)
-#define NANDCS		(0x01 << 25)
-#define ENDADDR		(0x01 << 31)
-
-#define read_data_reg(dev)		\
-	__raw_readl((dev)->reg + REG_SMDATA)
-
-#define write_data_reg(dev, val)	\
-	__raw_writel((val), (dev)->reg + REG_SMDATA)
-
-#define write_cmd_reg(dev, val)		\
-	__raw_writel((val), (dev)->reg + REG_SMCMD)
-
-#define write_addr_reg(dev, val)	\
-	__raw_writel((val), (dev)->reg + REG_SMADDR)
-
-struct nuc900_nand {
-	struct nand_chip chip;
-	void __iomem *reg;
-	struct clk *clk;
-	spinlock_t lock;
-};
-
-static inline struct nuc900_nand *mtd_to_nuc900(struct mtd_info *mtd)
-{
-	return container_of(mtd_to_nand(mtd), struct nuc900_nand, chip);
-}
-
-static const struct mtd_partition partitions[] = {
-	{
-	 .name = "NAND FS 0",
-	 .offset = 0,
-	 .size = 8 * 1024 * 1024
-	},
-	{
-	 .name = "NAND FS 1",
-	 .offset = MTDPART_OFS_APPEND,
-	 .size = MTDPART_SIZ_FULL
-	}
-};
-
-static unsigned char nuc900_nand_read_byte(struct nand_chip *chip)
-{
-	unsigned char ret;
-	struct nuc900_nand *nand = mtd_to_nuc900(nand_to_mtd(chip));
-
-	ret = (unsigned char)read_data_reg(nand);
-
-	return ret;
-}
-
-static void nuc900_nand_read_buf(struct nand_chip *chip,
-				 unsigned char *buf, int len)
-{
-	int i;
-	struct nuc900_nand *nand = mtd_to_nuc900(nand_to_mtd(chip));
-
-	for (i = 0; i < len; i++)
-		buf[i] = (unsigned char)read_data_reg(nand);
-}
-
-static void nuc900_nand_write_buf(struct nand_chip *chip,
-				  const unsigned char *buf, int len)
-{
-	int i;
-	struct nuc900_nand *nand = mtd_to_nuc900(nand_to_mtd(chip));
-
-	for (i = 0; i < len; i++)
-		write_data_reg(nand, buf[i]);
-}
-
-static int nuc900_check_rb(struct nuc900_nand *nand)
-{
-	unsigned int val;
-	spin_lock(&nand->lock);
-	val = __raw_readl(nand->reg + REG_SMISR);
-	val &= READYBUSY;
-	spin_unlock(&nand->lock);
-
-	return val;
-}
-
-static int nuc900_nand_devready(struct nand_chip *chip)
-{
-	struct nuc900_nand *nand = mtd_to_nuc900(nand_to_mtd(chip));
-	int ready;
-
-	ready = (nuc900_check_rb(nand)) ? 1 : 0;
-	return ready;
-}
-
-static void nuc900_nand_command_lp(struct nand_chip *chip,
-				   unsigned int command,
-				   int column, int page_addr)
-{
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nuc900_nand *nand = mtd_to_nuc900(mtd);
-
-	if (command == NAND_CMD_READOOB) {
-		column += mtd->writesize;
-		command = NAND_CMD_READ0;
-	}
-
-	write_cmd_reg(nand, command & 0xff);
-
-	if (column != -1 || page_addr != -1) {
-
-		if (column != -1) {
-			if (chip->options & NAND_BUSWIDTH_16 &&
-					!nand_opcode_8bits(command))
-				column >>= 1;
-			write_addr_reg(nand, column);
-			write_addr_reg(nand, column >> 8 | ENDADDR);
-		}
-		if (page_addr != -1) {
-			write_addr_reg(nand, page_addr);
-
-			if (chip->options & NAND_ROW_ADDR_3) {
-				write_addr_reg(nand, page_addr >> 8);
-				write_addr_reg(nand, page_addr >> 16 | ENDADDR);
-			} else {
-				write_addr_reg(nand, page_addr >> 8 | ENDADDR);
-			}
-		}
-	}
-
-	switch (command) {
-	case NAND_CMD_CACHEDPROG:
-	case NAND_CMD_PAGEPROG:
-	case NAND_CMD_ERASE1:
-	case NAND_CMD_ERASE2:
-	case NAND_CMD_SEQIN:
-	case NAND_CMD_RNDIN:
-	case NAND_CMD_STATUS:
-		return;
-
-	case NAND_CMD_RESET:
-		if (chip->legacy.dev_ready)
-			break;
-		udelay(chip->legacy.chip_delay);
-
-		write_cmd_reg(nand, NAND_CMD_STATUS);
-		write_cmd_reg(nand, command);
-
-		while (!nuc900_check_rb(nand))
-			;
-
-		return;
-
-	case NAND_CMD_RNDOUT:
-		write_cmd_reg(nand, NAND_CMD_RNDOUTSTART);
-		return;
-
-	case NAND_CMD_READ0:
-		write_cmd_reg(nand, NAND_CMD_READSTART);
-		/* fall through */
-
-	default:
-
-		if (!chip->legacy.dev_ready) {
-			udelay(chip->legacy.chip_delay);
-			return;
-		}
-	}
-
-	/* Apply this short delay always to ensure that we do wait tWB in
-	 * any case on any machine. */
-	ndelay(100);
-
-	while (!chip->legacy.dev_ready(chip))
-		;
-}
-
-
-static void nuc900_nand_enable(struct nuc900_nand *nand)
-{
-	unsigned int val;
-	spin_lock(&nand->lock);
-	__raw_writel(RESET_FMI, (nand->reg + REG_FMICSR));
-
-	val = __raw_readl(nand->reg + REG_FMICSR);
-
-	if (!(val & NAND_EN))
-		__raw_writel(val | NAND_EN, nand->reg + REG_FMICSR);
-
-	val = __raw_readl(nand->reg + REG_SMCSR);
-
-	val &= ~(SWRST|PSIZE|DMARWEN|BUSWID|ECC4EN|NANDCS);
-	val |= WP;
-
-	__raw_writel(val, nand->reg + REG_SMCSR);
-
-	spin_unlock(&nand->lock);
-}
-
-static int nuc900_nand_probe(struct platform_device *pdev)
-{
-	struct nuc900_nand *nuc900_nand;
-	struct nand_chip *chip;
-	struct mtd_info *mtd;
-	struct resource *res;
-
-	nuc900_nand = devm_kzalloc(&pdev->dev, sizeof(struct nuc900_nand),
-				   GFP_KERNEL);
-	if (!nuc900_nand)
-		return -ENOMEM;
-	chip = &(nuc900_nand->chip);
-	mtd = nand_to_mtd(chip);
-
-	mtd->dev.parent		= &pdev->dev;
-	spin_lock_init(&nuc900_nand->lock);
-
-	nuc900_nand->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(nuc900_nand->clk))
-		return -ENOENT;
-	clk_enable(nuc900_nand->clk);
-
-	chip->legacy.cmdfunc	= nuc900_nand_command_lp;
-	chip->legacy.dev_ready	= nuc900_nand_devready;
-	chip->legacy.read_byte	= nuc900_nand_read_byte;
-	chip->legacy.write_buf	= nuc900_nand_write_buf;
-	chip->legacy.read_buf	= nuc900_nand_read_buf;
-	chip->legacy.chip_delay	= 50;
-	chip->options		= 0;
-	chip->ecc.mode		= NAND_ECC_SOFT;
-	chip->ecc.algo		= NAND_ECC_HAMMING;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	nuc900_nand->reg = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(nuc900_nand->reg))
-		return PTR_ERR(nuc900_nand->reg);
-
-	nuc900_nand_enable(nuc900_nand);
-
-	if (nand_scan(chip, 1))
-		return -ENXIO;
-
-	mtd_device_register(mtd, partitions, ARRAY_SIZE(partitions));
-
-	platform_set_drvdata(pdev, nuc900_nand);
-
-	return 0;
-}
-
-static int nuc900_nand_remove(struct platform_device *pdev)
-{
-	struct nuc900_nand *nuc900_nand = platform_get_drvdata(pdev);
-
-	nand_release(&nuc900_nand->chip);
-	clk_disable(nuc900_nand->clk);
-
-	return 0;
-}
-
-static struct platform_driver nuc900_nand_driver = {
-	.probe		= nuc900_nand_probe,
-	.remove		= nuc900_nand_remove,
-	.driver		= {
-		.name	= "nuc900-fmi",
-	},
-};
-
-module_platform_driver(nuc900_nand_driver);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("w90p910/NUC9xx nand driver!");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:nuc900-fmi");
diff --git a/drivers/mtd/nand/raw/omap2.c b/drivers/mtd/nand/raw/omap2.c
index 8d881a28140e..6ec65f48501c 100644
--- a/drivers/mtd/nand/raw/omap2.c
+++ b/drivers/mtd/nand/raw/omap2.c
@@ -1501,7 +1501,7 @@ static int omap_elm_correct_data(struct nand_chip *chip, u_char *data,
 		}
 
 		/* Update number of correctable errors */
-		stat += err_vec[i].error_count;
+		stat = max_t(unsigned int, stat, err_vec[i].error_count);
 
 		/* Update page data with sector size */
 		data += ecc->size;
diff --git a/drivers/mtd/nand/raw/oxnas_nand.c b/drivers/mtd/nand/raw/oxnas_nand.c
index 30c51f772de6..c43cb4d92d3d 100644
--- a/drivers/mtd/nand/raw/oxnas_nand.c
+++ b/drivers/mtd/nand/raw/oxnas_nand.c
@@ -116,7 +116,7 @@ static int oxnas_nand_probe(struct platform_device *pdev)
 				    GFP_KERNEL);
 		if (!chip) {
 			err = -ENOMEM;
-			goto err_clk_unprepare;
+			goto err_release_child;
 		}
 
 		chip->controller = &oxnas->base;
@@ -137,12 +137,12 @@ static int oxnas_nand_probe(struct platform_device *pdev)
 		/* Scan to find existence of the device */
 		err = nand_scan(chip, 1);
 		if (err)
-			goto err_clk_unprepare;
+			goto err_release_child;
 
 		err = mtd_device_register(mtd, NULL, 0);
 		if (err) {
 			nand_release(chip);
-			goto err_clk_unprepare;
+			goto err_release_child;
 		}
 
 		oxnas->chips[nchips] = chip;
@@ -159,6 +159,8 @@ static int oxnas_nand_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_release_child:
+	of_node_put(nand_np);
 err_clk_unprepare:
 	clk_disable_unprepare(oxnas->clk);
 	return err;
diff --git a/drivers/mtd/nand/raw/r852.c b/drivers/mtd/nand/raw/r852.c
index dae0d235bb17..77774250fb11 100644
--- a/drivers/mtd/nand/raw/r852.c
+++ b/drivers/mtd/nand/raw/r852.c
@@ -998,7 +998,7 @@ static void r852_shutdown(struct pci_dev *pci_dev)
 #ifdef CONFIG_PM_SLEEP
 static int r852_suspend(struct device *device)
 {
-	struct r852_device *dev = pci_get_drvdata(to_pci_dev(device));
+	struct r852_device *dev = dev_get_drvdata(device);
 
 	if (dev->ctlreg & R852_CTL_CARDENABLE)
 		return -EBUSY;
@@ -1019,7 +1019,7 @@ static int r852_suspend(struct device *device)
 
 static int r852_resume(struct device *device)
 {
-	struct r852_device *dev = pci_get_drvdata(to_pci_dev(device));
+	struct r852_device *dev = dev_get_drvdata(device);
 
 	r852_disable_irqs(dev);
 	r852_card_update_present(dev);
diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index e63acc077c18..8cc852dc7d54 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -1427,21 +1427,16 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	struct stm32_fmc2_timings *tims = &nand->timings;
 	unsigned long hclk = clk_get_rate(fmc2->clk);
 	unsigned long hclkp = NSEC_PER_SEC / (hclk / 1000);
-	int tar, tclr, thiz, twait, tset_mem, tset_att, thold_mem, thold_att;
-
-	tar = hclkp;
-	if (tar < sdrt->tAR_min)
-		tar = sdrt->tAR_min;
-	tims->tar = DIV_ROUND_UP(tar, hclkp) - 1;
-	if (tims->tar > FMC2_PCR_TIMING_MASK)
-		tims->tar = FMC2_PCR_TIMING_MASK;
-
-	tclr = hclkp;
-	if (tclr < sdrt->tCLR_min)
-		tclr = sdrt->tCLR_min;
-	tims->tclr = DIV_ROUND_UP(tclr, hclkp) - 1;
-	if (tims->tclr > FMC2_PCR_TIMING_MASK)
-		tims->tclr = FMC2_PCR_TIMING_MASK;
+	unsigned long timing, tar, tclr, thiz, twait;
+	unsigned long tset_mem, tset_att, thold_mem, thold_att;
+
+	tar = max_t(unsigned long, hclkp, sdrt->tAR_min);
+	timing = DIV_ROUND_UP(tar, hclkp) - 1;
+	tims->tar = min_t(unsigned long, timing, FMC2_PCR_TIMING_MASK);
+
+	tclr = max_t(unsigned long, hclkp, sdrt->tCLR_min);
+	timing = DIV_ROUND_UP(tclr, hclkp) - 1;
+	tims->tclr = min_t(unsigned long, timing, FMC2_PCR_TIMING_MASK);
 
 	tims->thiz = FMC2_THIZ;
 	thiz = (tims->thiz + 1) * hclkp;
@@ -1451,18 +1446,11 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	 * tWAIT > tWP
 	 * tWAIT > tREA + tIO
 	 */
-	twait = hclkp;
-	if (twait < sdrt->tRP_min)
-		twait = sdrt->tRP_min;
-	if (twait < sdrt->tWP_min)
-		twait = sdrt->tWP_min;
-	if (twait < sdrt->tREA_max + FMC2_TIO)
-		twait = sdrt->tREA_max + FMC2_TIO;
-	tims->twait = DIV_ROUND_UP(twait, hclkp);
-	if (tims->twait == 0)
-		tims->twait = 1;
-	else if (tims->twait > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->twait = FMC2_PMEM_PATT_TIMING_MASK;
+	twait = max_t(unsigned long, hclkp, sdrt->tRP_min);
+	twait = max_t(unsigned long, twait, sdrt->tWP_min);
+	twait = max_t(unsigned long, twait, sdrt->tREA_max + FMC2_TIO);
+	timing = DIV_ROUND_UP(twait, hclkp);
+	tims->twait = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tSETUP_MEM > tCS - tWAIT
@@ -1477,20 +1465,15 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if (twait > thiz && (sdrt->tDS_min > twait - thiz) &&
 	    (tset_mem < sdrt->tDS_min - (twait - thiz)))
 		tset_mem = sdrt->tDS_min - (twait - thiz);
-	tims->tset_mem = DIV_ROUND_UP(tset_mem, hclkp);
-	if (tims->tset_mem == 0)
-		tims->tset_mem = 1;
-	else if (tims->tset_mem > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->tset_mem = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(tset_mem, hclkp);
+	tims->tset_mem = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tHOLD_MEM > tCH
 	 * tHOLD_MEM > tREH - tSETUP_MEM
 	 * tHOLD_MEM > max(tRC, tWC) - (tSETUP_MEM + tWAIT)
 	 */
-	thold_mem = hclkp;
-	if (thold_mem < sdrt->tCH_min)
-		thold_mem = sdrt->tCH_min;
+	thold_mem = max_t(unsigned long, hclkp, sdrt->tCH_min);
 	if (sdrt->tREH_min > tset_mem &&
 	    (thold_mem < sdrt->tREH_min - tset_mem))
 		thold_mem = sdrt->tREH_min - tset_mem;
@@ -1500,11 +1483,8 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if ((sdrt->tWC_min > tset_mem + twait) &&
 	    (thold_mem < sdrt->tWC_min - (tset_mem + twait)))
 		thold_mem = sdrt->tWC_min - (tset_mem + twait);
-	tims->thold_mem = DIV_ROUND_UP(thold_mem, hclkp);
-	if (tims->thold_mem == 0)
-		tims->thold_mem = 1;
-	else if (tims->thold_mem > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->thold_mem = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(thold_mem, hclkp);
+	tims->thold_mem = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tSETUP_ATT > tCS - tWAIT
@@ -1526,11 +1506,8 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if (twait > thiz && (sdrt->tDS_min > twait - thiz) &&
 	    (tset_att < sdrt->tDS_min - (twait - thiz)))
 		tset_att = sdrt->tDS_min - (twait - thiz);
-	tims->tset_att = DIV_ROUND_UP(tset_att, hclkp);
-	if (tims->tset_att == 0)
-		tims->tset_att = 1;
-	else if (tims->tset_att > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->tset_att = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(tset_att, hclkp);
+	tims->tset_att = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 
 	/*
 	 * tHOLD_ATT > tALH
@@ -1545,17 +1522,11 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	 * tHOLD_ATT > tRC - (tSETUP_ATT + tWAIT)
 	 * tHOLD_ATT > tWC - (tSETUP_ATT + tWAIT)
 	 */
-	thold_att = hclkp;
-	if (thold_att < sdrt->tALH_min)
-		thold_att = sdrt->tALH_min;
-	if (thold_att < sdrt->tCH_min)
-		thold_att = sdrt->tCH_min;
-	if (thold_att < sdrt->tCLH_min)
-		thold_att = sdrt->tCLH_min;
-	if (thold_att < sdrt->tCOH_min)
-		thold_att = sdrt->tCOH_min;
-	if (thold_att < sdrt->tDH_min)
-		thold_att = sdrt->tDH_min;
+	thold_att = max_t(unsigned long, hclkp, sdrt->tALH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tCH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tCLH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tCOH_min);
+	thold_att = max_t(unsigned long, thold_att, sdrt->tDH_min);
 	if ((sdrt->tWB_max + FMC2_TIO + FMC2_TSYNC > tset_mem) &&
 	    (thold_att < sdrt->tWB_max + FMC2_TIO + FMC2_TSYNC - tset_mem))
 		thold_att = sdrt->tWB_max + FMC2_TIO + FMC2_TSYNC - tset_mem;
@@ -1574,11 +1545,8 @@ static void stm32_fmc2_calc_timings(struct nand_chip *chip,
 	if ((sdrt->tWC_min > tset_att + twait) &&
 	    (thold_att < sdrt->tWC_min - (tset_att + twait)))
 		thold_att = sdrt->tWC_min - (tset_att + twait);
-	tims->thold_att = DIV_ROUND_UP(thold_att, hclkp);
-	if (tims->thold_att == 0)
-		tims->thold_att = 1;
-	else if (tims->thold_att > FMC2_PMEM_PATT_TIMING_MASK)
-		tims->thold_att = FMC2_PMEM_PATT_TIMING_MASK;
+	timing = DIV_ROUND_UP(thold_att, hclkp);
+	tims->thold_att = clamp_val(timing, 1, FMC2_PMEM_PATT_TIMING_MASK);
 }
 
 static int stm32_fmc2_setup_interface(struct nand_chip *chip, int chipnr,
diff --git a/drivers/mtd/nand/raw/tango_nand.c b/drivers/mtd/nand/raw/tango_nand.c
index b3f2cabcc7c0..9acf2de37ee0 100644
--- a/drivers/mtd/nand/raw/tango_nand.c
+++ b/drivers/mtd/nand/raw/tango_nand.c
@@ -659,6 +659,7 @@ static int tango_nand_probe(struct platform_device *pdev)
 		err = chip_init(&pdev->dev, np);
 		if (err) {
 			tango_nand_remove(pdev);
+			of_node_put(np);
 			return err;
 		}
 	}
diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
index e4fe8c4bc711..6b399a75f9ae 100644
--- a/drivers/mtd/nand/raw/vf610_nfc.c
+++ b/drivers/mtd/nand/raw/vf610_nfc.c
@@ -862,6 +862,7 @@ static int vf610_nfc_probe(struct platform_device *pdev)
 				dev_err(nfc->dev,
 					"Only one NAND chip supported!\n");
 				err = -EINVAL;
+				of_node_put(child);
 				goto err_disable_clk;
 			}