Merge tag 'nand/for-6.1' into mtd/next

Raw NAND core changes:
* Replace of_gpio_named_count() by gpiod_count()
  - Remove misguided comment of nand_get_device()
  - bbt: Use the bitmap API to allocate bitmaps

Raw NAND controller drivers changes:
* Meson:
  - Stop supporting legacy clocks
  - Refine resource getting in probe
  - Convert bindings to yaml
  - Fix clock handling and update the bindings accordingly
  - Fix bit map use in meson_nfc_ecc_correct()
* bcm47xx:
  - Fix spelling typo in comment
* STM32 FMC2:
  - Switch to using devm_fwnode_gpiod_get()
  - Fix dma_map_sg error check
* Cadence:
  - Remove an unneeded result variable
* Marvell:
  - Fix error handle regarding dma_map_sg
* Orion:
  - Use devm_clk_get_optional()
* Cafe:
  - Use correct function name in comment block
* Atmel:
  - Unmap streaming DMA mappings
* Arasan:
  - Stop using 0 as NULL pointer
* GPMI:
  - Fix typo 'the the' in comment
* BRCM:
  - Add individual glue driver selection
  - Move Kconfig to driver folder
* FSL: Fix none ECC mode
* Intel:
  - Use devm_platform_ioremap_resource_byname()
  - Remove unused clk_rate member from struct ebu_nand
  - Remove unused nand_pa member from ebu_nand_cs
  - Don't re-define NAND_DATA_IFACE_CHECK_ONLY
  - Remove undocumented compatible string
  - Fix compatible string in the bindings
  - Read the chip-select line from the correct OF node
  - Fix maximum chip select value in the bindings

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

17 files changed, 156 insertions, 135 deletions

diff --git a/drivers/mtd/nand/bbt.c b/drivers/mtd/nand/bbt.c
index 64af6898131d..db4f93a903e4 100644
--- a/drivers/mtd/nand/bbt.c
+++ b/drivers/mtd/nand/bbt.c
@@ -24,11 +24,8 @@ int nanddev_bbt_init(struct nand_device *nand)
 {
 	unsigned int bits_per_block = fls(NAND_BBT_BLOCK_NUM_STATUS);
 	unsigned int nblocks = nanddev_neraseblocks(nand);
-	unsigned int nwords = DIV_ROUND_UP(nblocks * bits_per_block,
-					   BITS_PER_LONG);
 
-	nand->bbt.cache = kcalloc(nwords, sizeof(*nand->bbt.cache),
-				  GFP_KERNEL);
+	nand->bbt.cache = bitmap_zalloc(nblocks * bits_per_block, GFP_KERNEL);
 	if (!nand->bbt.cache)
 		return -ENOMEM;
 
@@ -44,7 +41,7 @@ EXPORT_SYMBOL_GPL(nanddev_bbt_init);
  */
 void nanddev_bbt_cleanup(struct nand_device *nand)
 {
-	kfree(nand->bbt.cache);
+	bitmap_free(nand->bbt.cache);
 }
 EXPORT_SYMBOL_GPL(nanddev_bbt_cleanup);
 
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 8b6d7a515445..4cd40af362de 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -200,27 +200,7 @@ config MTD_NAND_TMIO
 	  Support for NAND flash connected to a Toshiba Mobile IO
 	  Controller in some PDAs, including the Sharp SL6000x.
 
-config MTD_NAND_BRCMNAND
-	tristate "Broadcom STB NAND controller"
-	depends on ARM || ARM64 || MIPS || COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  Enables the Broadcom NAND controller driver. The controller was
-	  originally designed for Set-Top Box but is used on various BCM7xxx,
-	  BCM3xxx, BCM63xxx, iProc/Cygnus and more.
-
-if MTD_NAND_BRCMNAND
-
-config MTD_NAND_BRCMNAND_BCMA
-	tristate "Broadcom BCMA NAND controller"
-	depends on BCMA_NFLASH
-	depends on BCMA
-	help
-	  Enables the BRCMNAND controller over BCMA on BCM47186/BCM5358 SoCs.
-	  The glue driver will take care of performing the low-level I/O
-	  operations to interface the BRCMNAND controller over the BCMA bus.
-
-endif # MTD_NAND_BRCMNAND
+source "drivers/mtd/nand/raw/brcmnand/Kconfig"
 
 config MTD_NAND_BCM47XXNFLASH
 	tristate "BCM4706 BCMA NAND controller"
@@ -410,7 +390,7 @@ config MTD_NAND_STM32_FMC2
 
 config MTD_NAND_MESON
 	tristate "Support for NAND controller on Amlogic's Meson SoCs"
-	depends on ARCH_MESON || COMPILE_TEST
+	depends on COMMON_CLK && (ARCH_MESON || COMPILE_TEST)
 	select MFD_SYSCON
 	help
 	  Enables support for NAND controller on Amlogic's Meson SoCs.
diff --git a/drivers/mtd/nand/raw/arasan-nand-controller.c b/drivers/mtd/nand/raw/arasan-nand-controller.c
index 296fb16c8dc3..ec7e6eeac55f 100644
--- a/drivers/mtd/nand/raw/arasan-nand-controller.c
+++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
@@ -915,7 +915,7 @@ static int anfc_check_op(struct nand_chip *chip,
 			if (instr->ctx.data.len > ANFC_MAX_CHUNK_SIZE)
 				return -ENOTSUPP;
 
-			if (anfc_pkt_len_config(instr->ctx.data.len, 0, 0))
+			if (anfc_pkt_len_config(instr->ctx.data.len, NULL, NULL))
 				return -ENOTSUPP;
 
 			break;
diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index c9ac3baf68c0..41c6bd6e2d72 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -405,6 +405,7 @@ static int atmel_nand_dma_transfer(struct atmel_nand_controller *nc,
 
 	dma_async_issue_pending(nc->dmac);
 	wait_for_completion(&finished);
+	dma_unmap_single(nc->dev, buf_dma, len, dir);
 
 	return 0;
 
diff --git a/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c b/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c
index 8bb17c5a66c3..6487dfc64258 100644
--- a/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c
+++ b/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c
@@ -14,7 +14,7 @@
 #include <linux/bcma/bcma.h>
 
 /* Broadcom uses 1'000'000 but it seems to be too many. Tests on WNDR4500 has
- * shown ~1000 retries as maxiumum. */
+ * shown ~1000 retries as maximum. */
 #define NFLASH_READY_RETRIES		10000
 
 #define NFLASH_SECTOR_SIZE		512
diff --git a/drivers/mtd/nand/raw/brcmnand/Kconfig b/drivers/mtd/nand/raw/brcmnand/Kconfig
new file mode 100644
index 000000000000..4bc51bf60aca
--- /dev/null
+++ b/drivers/mtd/nand/raw/brcmnand/Kconfig
@@ -0,0 +1,49 @@
+config MTD_NAND_BRCMNAND
+	tristate "Broadcom STB NAND controller"
+	depends on ARM || ARM64 || MIPS || COMPILE_TEST
+	depends on HAS_IOMEM
+	help
+	  Enables the Broadcom NAND controller driver. The controller was
+	  originally designed for Set-Top Box but is used on various BCM7xxx,
+	  BCM3xxx, BCM63xxx, iProc/Cygnus and more.
+
+if MTD_NAND_BRCMNAND
+
+config MTD_NAND_BRCMNAND_BCM63XX
+	tristate "Broadcom BCM63xx NAND controller glue"
+	default BCM63XX
+	help
+	  Enables the BRCMNAND glue driver to register the NAND controller
+	  on Broadcom BCM63xx MIPS-based DSL platforms.
+
+config MTD_NAND_BRCMNAND_BCMA
+	tristate "Broadcom BCMA NAND controller"
+	depends on BCMA_NFLASH
+	depends on BCMA
+	help
+	  Enables the BRCMNAND controller over BCMA on BCM47186/BCM5358 SoCs.
+	  The glue driver will take care of performing the low-level I/O
+	  operations to interface the BRCMNAND controller over the BCMA bus.
+
+config MTD_NAND_BRCMNAND_BCMBCA
+	tristate "Broadcom BCMBCA NAND controller glue"
+	default ARCH_BCMBCA
+	help
+	  Enables the BRCMNAND glue driver to register the NAND controller
+	  on Broadcom BCA platforms.
+
+config MTD_NAND_BRCMNAND_BRCMSTB
+	tristate "Broadcom STB Nand controller glue"
+	default ARCH_BRCMSTB
+	help
+	  Enables the BRCMNAND glue driver to register the NAND controller
+	  on Broadcom STB platforms.
+
+config MTD_NAND_BRCMNAND_IPROC
+	tristate "Broadcom iProc NAND controller glue"
+	default ARCH_BCM_IPROC
+	help
+	  Enables the BRCMNAND controller glue driver to register the NAND
+	  controller on Broadcom iProc platforms.
+
+endif # MTD_NAND_BRCMNAND
diff --git a/drivers/mtd/nand/raw/brcmnand/Makefile b/drivers/mtd/nand/raw/brcmnand/Makefile
index 16dc7254200e..9907e3ec4bb2 100644
--- a/drivers/mtd/nand/raw/brcmnand/Makefile
+++ b/drivers/mtd/nand/raw/brcmnand/Makefile
@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 # link order matters; don't link the more generic brcmstb_nand.o before the
 # more specific iproc_nand.o, for instance
-obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= iproc_nand.o
-obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= bcm63138_nand.o
-obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= bcm6368_nand.o
-obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= brcmstb_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND_IPROC)	+= iproc_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND_BCMBCA)	+= bcm63138_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND_BCM63XX)	+= bcm6368_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND_BRCMSTB)	+= brcmstb_nand.o
 obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= brcmnand.o
 
 obj-$(CONFIG_MTD_NAND_BRCMNAND_BCMA)	+= bcma_nand.o
diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c
index 0d72672f8b64..9dac3ca69d57 100644
--- a/drivers/mtd/nand/raw/cadence-nand-controller.c
+++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
@@ -1979,7 +1979,6 @@ static int cadence_nand_force_byte_access(struct nand_chip *chip,
 					  bool force_8bit)
 {
 	struct cdns_nand_ctrl *cdns_ctrl = to_cdns_nand_ctrl(chip->controller);
-	int status;
 
 	/*
 	 * Callers of this function do not verify if the NAND is using a 16-bit
@@ -1990,9 +1989,7 @@ static int cadence_nand_force_byte_access(struct nand_chip *chip,
 	if (!(chip->options & NAND_BUSWIDTH_16))
 		return 0;
 
-	status = cadence_nand_set_access_width16(cdns_ctrl, !force_8bit);
-
-	return status;
+	return cadence_nand_set_access_width16(cdns_ctrl, !force_8bit);
 }
 
 static int cadence_nand_cmd_opcode(struct nand_chip *chip,
diff --git a/drivers/mtd/nand/raw/cafe_nand.c b/drivers/mtd/nand/raw/cafe_nand.c
index af119e376352..66385c4fb994 100644
--- a/drivers/mtd/nand/raw/cafe_nand.c
+++ b/drivers/mtd/nand/raw/cafe_nand.c
@@ -358,7 +358,7 @@ static int cafe_nand_read_oob(struct nand_chip *chip, int page)
 	return nand_read_oob_op(chip, page, 0, chip->oob_poi, mtd->oobsize);
 }
 /**
- * cafe_nand_read_page_syndrome - [REPLACEABLE] hardware ecc syndrome based page read
+ * cafe_nand_read_page - [REPLACEABLE] hardware ecc syndrome based page read
  * @chip:	nand chip info structure
  * @buf:	buffer to store read data
  * @oob_required:	caller expects OOB data read to chip->oob_poi
diff --git a/drivers/mtd/nand/raw/fsl_elbc_nand.c b/drivers/mtd/nand/raw/fsl_elbc_nand.c
index aab93b9e6052..a18d121396aa 100644
--- a/drivers/mtd/nand/raw/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_elbc_nand.c
@@ -726,36 +726,40 @@ static int fsl_elbc_attach_chip(struct nand_chip *chip)
 	struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
 	unsigned int al;
 
-	switch (chip->ecc.engine_type) {
 	/*
 	 * if ECC was not chosen in DT, decide whether to use HW or SW ECC from
 	 * CS Base Register
 	 */
-	case NAND_ECC_ENGINE_TYPE_NONE:
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_INVALID) {
 		/* If CS Base Register selects full hardware ECC then use it */
 		if ((in_be32(&lbc->bank[priv->bank].br) & BR_DECC) ==
 		    BR_DECC_CHK_GEN) {
-			chip->ecc.read_page = fsl_elbc_read_page;
-			chip->ecc.write_page = fsl_elbc_write_page;
-			chip->ecc.write_subpage = fsl_elbc_write_subpage;
-
 			chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
-			mtd_set_ooblayout(mtd, &fsl_elbc_ooblayout_ops);
-			chip->ecc.size = 512;
-			chip->ecc.bytes = 3;
-			chip->ecc.strength = 1;
 		} else {
 			/* otherwise fall back to default software ECC */
 			chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 			chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		}
+	}
+
+	switch (chip->ecc.engine_type) {
+	/* if HW ECC was chosen, setup ecc and oob layout */
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
+		chip->ecc.read_page = fsl_elbc_read_page;
+		chip->ecc.write_page = fsl_elbc_write_page;
+		chip->ecc.write_subpage = fsl_elbc_write_subpage;
+		mtd_set_ooblayout(mtd, &fsl_elbc_ooblayout_ops);
+		chip->ecc.size = 512;
+		chip->ecc.bytes = 3;
+		chip->ecc.strength = 1;
 		break;
 
-	/* if SW ECC was chosen in DT, we do not need to set anything here */
+	/* if none or SW ECC was chosen, we do not need to set anything here */
+	case NAND_ECC_ENGINE_TYPE_NONE:
 	case NAND_ECC_ENGINE_TYPE_SOFT:
+	case NAND_ECC_ENGINE_TYPE_ON_DIE:
 		break;
 
-	/* should we also implement *_ECC_ENGINE_CONTROLLER to do as above? */
 	default:
 		return -EINVAL;
 	}
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 93da23682d86..01ccbde748f3 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -1361,7 +1361,7 @@ error_alloc:
 /*
  * Handles block mark swapping.
  * It can be called in swapping the block mark, or swapping it back,
- * because the the operations are the same.
+ * because the operations are the same.
  */
 static void block_mark_swapping(struct gpmi_nand_data *this,
 				void *payload, void *auxiliary)
diff --git a/drivers/mtd/nand/raw/intel-nand-controller.c b/drivers/mtd/nand/raw/intel-nand-controller.c
index e91b879b32bd..d4a0987e93ac 100644
--- a/drivers/mtd/nand/raw/intel-nand-controller.c
+++ b/drivers/mtd/nand/raw/intel-nand-controller.c
@@ -16,6 +16,7 @@
 #include <linux/mtd/rawnand.h>
 #include <linux/mtd/nand.h>
 
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
@@ -99,15 +100,12 @@
 
 #define HSNAND_ECC_OFFSET	0x008
 
-#define NAND_DATA_IFACE_CHECK_ONLY	-1
-
 #define MAX_CS	2
 
 #define USEC_PER_SEC	1000000L
 
 struct ebu_nand_cs {
 	void __iomem *chipaddr;
-	dma_addr_t nand_pa;
 	u32 addr_sel;
 };
 
@@ -120,7 +118,6 @@ struct ebu_nand_controller {
 	struct dma_chan *dma_tx;
 	struct dma_chan *dma_rx;
 	struct completion dma_access_complete;
-	unsigned long clk_rate;
 	struct clk *clk;
 	u32 nd_para0;
 	u8 cs_num;
@@ -580,6 +577,7 @@ static int ebu_nand_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct ebu_nand_controller *ebu_host;
+	struct device_node *chip_np;
 	struct nand_chip *nand;
 	struct mtd_info *mtd;
 	struct resource *res;
@@ -594,17 +592,20 @@ static int ebu_nand_probe(struct platform_device *pdev)
 	ebu_host->dev = dev;
 	nand_controller_init(&ebu_host->controller);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ebunand");
-	ebu_host->ebu = devm_ioremap_resource(&pdev->dev, res);
+	ebu_host->ebu = devm_platform_ioremap_resource_byname(pdev, "ebunand");
 	if (IS_ERR(ebu_host->ebu))
 		return PTR_ERR(ebu_host->ebu);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hsnand");
-	ebu_host->hsnand = devm_ioremap_resource(&pdev->dev, res);
+	ebu_host->hsnand = devm_platform_ioremap_resource_byname(pdev, "hsnand");
 	if (IS_ERR(ebu_host->hsnand))
 		return PTR_ERR(ebu_host->hsnand);
 
-	ret = device_property_read_u32(dev, "reg", &cs);
+	chip_np = of_get_next_child(dev->of_node, NULL);
+	if (!chip_np)
+		return dev_err_probe(dev, -EINVAL,
+				     "Could not find child node for the NAND chip\n");
+
+	ret = of_property_read_u32(chip_np, "reg", &cs);
 	if (ret) {
 		dev_err(dev, "failed to get chip select: %d\n", ret);
 		return ret;
@@ -617,11 +618,10 @@ static int ebu_nand_probe(struct platform_device *pdev)
 	ebu_host->cs_num = cs;
 
 	resname = devm_kasprintf(dev, GFP_KERNEL, "nand_cs%d", cs);
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, resname);
-	ebu_host->cs[cs].chipaddr = devm_ioremap_resource(dev, res);
+	ebu_host->cs[cs].chipaddr = devm_platform_ioremap_resource_byname(pdev,
+									  resname);
 	if (IS_ERR(ebu_host->cs[cs].chipaddr))
 		return PTR_ERR(ebu_host->cs[cs].chipaddr);
-	ebu_host->cs[cs].nand_pa = res->start;
 
 	ebu_host->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(ebu_host->clk))
@@ -633,7 +633,6 @@ static int ebu_nand_probe(struct platform_device *pdev)
 		dev_err(dev, "failed to enable clock: %d\n", ret);
 		return ret;
 	}
-	ebu_host->clk_rate = clk_get_rate(ebu_host->clk);
 
 	ebu_host->dma_tx = dma_request_chan(dev, "tx");
 	if (IS_ERR(ebu_host->dma_tx)) {
@@ -660,7 +659,7 @@ static int ebu_nand_probe(struct platform_device *pdev)
 	writel(ebu_host->cs[cs].addr_sel | EBU_ADDR_MASK(5) | EBU_ADDR_SEL_REGEN,
 	       ebu_host->ebu + EBU_ADDR_SEL(cs));
 
-	nand_set_flash_node(&ebu_host->chip, dev->of_node);
+	nand_set_flash_node(&ebu_host->chip, chip_np);
 
 	mtd = nand_to_mtd(&ebu_host->chip);
 	if (!mtd->name) {
@@ -716,7 +715,6 @@ static int ebu_nand_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id ebu_nand_match[] = {
-	{ .compatible = "intel,nand-controller" },
 	{ .compatible = "intel,lgm-ebunand" },
 	{}
 };
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index 2455a581fd70..d9f2f1d0b5ef 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -865,13 +865,19 @@ static int marvell_nfc_xfer_data_dma(struct marvell_nfc *nfc,
 	marvell_nfc_enable_dma(nfc);
 	/* Prepare the DMA transfer */
 	sg_init_one(&sg, nfc->dma_buf, dma_len);
-	dma_map_sg(nfc->dma_chan->device->dev, &sg, 1, direction);
+	ret = dma_map_sg(nfc->dma_chan->device->dev, &sg, 1, direction);
+	if (!ret) {
+		dev_err(nfc->dev, "Could not map DMA S/G list\n");
+		return -ENXIO;
+	}
+
 	tx = dmaengine_prep_slave_sg(nfc->dma_chan, &sg, 1,
 				     direction == DMA_FROM_DEVICE ?
 				     DMA_DEV_TO_MEM : DMA_MEM_TO_DEV,
 				     DMA_PREP_INTERRUPT);
 	if (!tx) {
 		dev_err(nfc->dev, "Could not prepare DMA S/G list\n");
+		dma_unmap_sg(nfc->dma_chan->device->dev, &sg, 1, direction);
 		return -ENXIO;
 	}
 
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index 829b76b303aa..5ee01231ac4c 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -10,6 +10,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/interrupt.h>
 #include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/mtd/rawnand.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mfd/syscon.h>
@@ -56,6 +57,9 @@
 
 #define NFC_RB_IRQ_EN		BIT(21)
 
+#define CLK_DIV_SHIFT		0
+#define CLK_DIV_WIDTH		6
+
 #define CMDRWGEN(cmd_dir, ran, bch, short_mode, page_size, pages)	\
 	(								\
 		(cmd_dir)			|			\
@@ -151,15 +155,15 @@ struct meson_nfc {
 	struct nand_controller controller;
 	struct clk *core_clk;
 	struct clk *device_clk;
-	struct clk *phase_tx;
-	struct clk *phase_rx;
+	struct clk *nand_clk;
+	struct clk_divider nand_divider;
 
 	unsigned long clk_rate;
 	u32 bus_timing;
 
 	struct device *dev;
 	void __iomem *reg_base;
-	struct regmap *reg_clk;
+	void __iomem *reg_clk;
 	struct completion completion;
 	struct list_head chips;
 	const struct meson_nfc_data *data;
@@ -235,7 +239,7 @@ static void meson_nfc_select_chip(struct nand_chip *nand, int chip)
 	nfc->timing.tbers_max = meson_chip->tbers_max;
 
 	if (nfc->clk_rate != meson_chip->clk_rate) {
-		ret = clk_set_rate(nfc->device_clk, meson_chip->clk_rate);
+		ret = clk_set_rate(nfc->nand_clk, meson_chip->clk_rate);
 		if (ret) {
 			dev_err(nfc->dev, "failed to set clock rate\n");
 			return;
@@ -454,7 +458,7 @@ static int meson_nfc_ecc_correct(struct nand_chip *nand, u32 *bitflips,
 		if (ECC_ERR_CNT(*info) != ECC_UNCORRECTABLE) {
 			mtd->ecc_stats.corrected += ECC_ERR_CNT(*info);
 			*bitflips = max_t(u32, *bitflips, ECC_ERR_CNT(*info));
-			*correct_bitmap |= 1 >> i;
+			*correct_bitmap |= BIT_ULL(i);
 			continue;
 		}
 		if ((nand->options & NAND_NEED_SCRAMBLING) &&
@@ -800,7 +804,7 @@ static int meson_nfc_read_page_hwecc(struct nand_chip *nand, u8 *buf,
 			u8 *data = buf + i * ecc->size;
 			u8 *oob = nand->oob_poi + i * (ecc->bytes + 2);
 
-			if (correct_bitmap & (1 << i))
+			if (correct_bitmap & BIT_ULL(i))
 				continue;
 			ret = nand_check_erased_ecc_chunk(data,	ecc->size,
 							  oob, ecc->bytes + 2,
@@ -987,6 +991,8 @@ static const struct mtd_ooblayout_ops meson_ooblayout_ops = {
 
 static int meson_nfc_clk_init(struct meson_nfc *nfc)
 {
+	struct clk_parent_data nfc_divider_parent_data[1];
+	struct clk_init_data init = {0};
 	int ret;
 
 	/* request core clock */
@@ -1002,21 +1008,28 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc)
 		return PTR_ERR(nfc->device_clk);
 	}
 
-	nfc->phase_tx = devm_clk_get(nfc->dev, "tx");
-	if (IS_ERR(nfc->phase_tx)) {
-		dev_err(nfc->dev, "failed to get TX clk\n");
-		return PTR_ERR(nfc->phase_tx);
-	}
-
-	nfc->phase_rx = devm_clk_get(nfc->dev, "rx");
-	if (IS_ERR(nfc->phase_rx)) {
-		dev_err(nfc->dev, "failed to get RX clk\n");
-		return PTR_ERR(nfc->phase_rx);
-	}
+	init.name = devm_kasprintf(nfc->dev,
+				   GFP_KERNEL, "%s#div",
+				   dev_name(nfc->dev));
+	init.ops = &clk_divider_ops;
+	nfc_divider_parent_data[0].fw_name = "device";
+	init.parent_data = nfc_divider_parent_data;
+	init.num_parents = 1;
+	nfc->nand_divider.reg = nfc->reg_clk;
+	nfc->nand_divider.shift = CLK_DIV_SHIFT;
+	nfc->nand_divider.width = CLK_DIV_WIDTH;
+	nfc->nand_divider.hw.init = &init;
+	nfc->nand_divider.flags = CLK_DIVIDER_ONE_BASED |
+				  CLK_DIVIDER_ROUND_CLOSEST |
+				  CLK_DIVIDER_ALLOW_ZERO;
+
+	nfc->nand_clk = devm_clk_register(nfc->dev, &nfc->nand_divider.hw);
+	if (IS_ERR(nfc->nand_clk))
+		return PTR_ERR(nfc->nand_clk);
 
 	/* init SD_EMMC_CLOCK to sane defaults w/min clock rate */
-	regmap_update_bits(nfc->reg_clk,
-			   0, CLK_SELECT_NAND, CLK_SELECT_NAND);
+	writel(CLK_SELECT_NAND | readl(nfc->reg_clk),
+	       nfc->reg_clk);
 
 	ret = clk_prepare_enable(nfc->core_clk);
 	if (ret) {
@@ -1030,29 +1043,21 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc)
 		goto err_device_clk;
 	}
 
-	ret = clk_prepare_enable(nfc->phase_tx);
+	ret = clk_prepare_enable(nfc->nand_clk);
 	if (ret) {
-		dev_err(nfc->dev, "failed to enable TX clock\n");
-		goto err_phase_tx;
+		dev_err(nfc->dev, "pre enable NFC divider fail\n");
+		goto err_nand_clk;
 	}
 
-	ret = clk_prepare_enable(nfc->phase_rx);
-	if (ret) {
-		dev_err(nfc->dev, "failed to enable RX clock\n");
-		goto err_phase_rx;
-	}
-
-	ret = clk_set_rate(nfc->device_clk, 24000000);
+	ret = clk_set_rate(nfc->nand_clk, 24000000);
 	if (ret)
-		goto err_disable_rx;
+		goto err_disable_clk;
 
 	return 0;
 
-err_disable_rx:
-	clk_disable_unprepare(nfc->phase_rx);
-err_phase_rx:
-	clk_disable_unprepare(nfc->phase_tx);
-err_phase_tx:
+err_disable_clk:
+	clk_disable_unprepare(nfc->nand_clk);
+err_nand_clk:
 	clk_disable_unprepare(nfc->device_clk);
 err_device_clk:
 	clk_disable_unprepare(nfc->core_clk);
@@ -1061,8 +1066,7 @@ err_device_clk:
 
 static void meson_nfc_disable_clk(struct meson_nfc *nfc)
 {
-	clk_disable_unprepare(nfc->phase_rx);
-	clk_disable_unprepare(nfc->phase_tx);
+	clk_disable_unprepare(nfc->nand_clk);
 	clk_disable_unprepare(nfc->device_clk);
 	clk_disable_unprepare(nfc->core_clk);
 }
@@ -1368,7 +1372,6 @@ static int meson_nfc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct meson_nfc *nfc;
-	struct resource *res;
 	int ret, irq;
 
 	nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL);
@@ -1385,18 +1388,13 @@ static int meson_nfc_probe(struct platform_device *pdev)
 
 	nfc->dev = dev;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	nfc->reg_base = devm_ioremap_resource(dev, res);
+	nfc->reg_base = devm_platform_ioremap_resource_byname(pdev, "nfc");
 	if (IS_ERR(nfc->reg_base))
 		return PTR_ERR(nfc->reg_base);
 
-	nfc->reg_clk =
-		syscon_regmap_lookup_by_phandle(dev->of_node,
-						"amlogic,mmc-syscon");
-	if (IS_ERR(nfc->reg_clk)) {
-		dev_err(dev, "Failed to lookup clock base\n");
+	nfc->reg_clk = devm_platform_ioremap_resource_byname(pdev, "emmc");
+	if (IS_ERR(nfc->reg_clk))
 		return PTR_ERR(nfc->reg_clk);
-	}
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 3e20de1e145c..33f2c98a030e 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -335,8 +335,6 @@ static int nand_isbad_bbm(struct nand_chip *chip, loff_t ofs)
  * @chip: NAND chip structure
  *
  * Lock the device and its controller for exclusive access
- *
- * Return: -EBUSY if the chip has been suspended, 0 otherwise
  */
 static void nand_get_device(struct nand_chip *chip)
 {
@@ -5341,11 +5339,10 @@ static int of_get_nand_secure_regions(struct nand_chip *chip)
 int rawnand_dt_parse_gpio_cs(struct device *dev, struct gpio_desc ***cs_array,
 			     unsigned int *ncs_array)
 {
-	struct device_node *np = dev->of_node;
 	struct gpio_desc **descs;
 	int ndescs, i;
 
-	ndescs = of_gpio_named_count(np, "cs-gpios");
+	ndescs = gpiod_count(dev, "cs");
 	if (ndescs < 0) {
 		dev_dbg(dev, "No valid cs-gpios property\n");
 		return 0;
diff --git a/drivers/mtd/nand/raw/orion_nand.c b/drivers/mtd/nand/raw/orion_nand.c
index 2c87c7d89205..1bfecf502216 100644
--- a/drivers/mtd/nand/raw/orion_nand.c
+++ b/drivers/mtd/nand/raw/orion_nand.c
@@ -170,18 +170,11 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, info);
 
-	/* Not all platforms can gate the clock, so it is not
-	   an error if the clock does not exists. */
-	info->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(info->clk)) {
-		ret = PTR_ERR(info->clk);
-		if (ret == -ENOENT) {
-			info->clk = NULL;
-		} else {
-			dev_err(&pdev->dev, "failed to get clock!\n");
-			return ret;
-		}
-	}
+	/* Not all platforms can gate the clock, so it is optional. */
+	info->clk = devm_clk_get_optional(&pdev->dev, NULL);
+	if (IS_ERR(info->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(info->clk),
+				     "failed to get clock!\n");
 
 	ret = clk_prepare_enable(info->clk);
 	if (ret) {
diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index 87c1c7dd97eb..5d627048c420 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -862,8 +862,8 @@ static int stm32_fmc2_nfc_xfer(struct nand_chip *chip, const u8 *buf,
 
 	ret = dma_map_sg(nfc->dev, nfc->dma_data_sg.sgl,
 			 eccsteps, dma_data_dir);
-	if (ret < 0)
-		return ret;
+	if (!ret)
+		return -EIO;
 
 	desc_data = dmaengine_prep_slave_sg(dma_ch, nfc->dma_data_sg.sgl,
 					    eccsteps, dma_transfer_dir,
@@ -893,8 +893,10 @@ static int stm32_fmc2_nfc_xfer(struct nand_chip *chip, const u8 *buf,
 
 		ret = dma_map_sg(nfc->dev, nfc->dma_ecc_sg.sgl,
 				 eccsteps, dma_data_dir);
-		if (ret < 0)
+		if (!ret) {
+			ret = -EIO;
 			goto err_unmap_data;
+		}
 
 		desc_ecc = dmaengine_prep_slave_sg(nfc->dma_ecc_ch,
 						   nfc->dma_ecc_sg.sgl,
@@ -1799,9 +1801,8 @@ static int stm32_fmc2_nfc_parse_child(struct stm32_fmc2_nfc *nfc,
 		nand->cs_used[i] = cs;
 	}
 
-	nand->wp_gpio = devm_gpiod_get_from_of_node(nfc->dev, dn,
-						    "wp-gpios", 0,
-						    GPIOD_OUT_HIGH, "wp");
+	nand->wp_gpio = devm_fwnode_gpiod_get(nfc->dev, of_fwnode_handle(dn),
+					      "wp", GPIOD_OUT_HIGH, "wp");
 	if (IS_ERR(nand->wp_gpio)) {
 		ret = PTR_ERR(nand->wp_gpio);
 		if (ret != -ENOENT)