[PATCH v4 03/13] mtd: rawnand: Rename a NAND chip option

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

NAND controller drivers can set the NAND_USE_BOUNCE_BUFFER flag to a
chip 'option' field. With this flag, the core is responsible of
providing DMA-able buffers.

The current behavior is to not force the use of a bounce buffer when
the core thinks this is not needed. So in the end the name is a bit
misleading, because in theory we will always have a DMA buffer but in
practice it will not always be a bounce buffer.

Rename this flag NAND_USES_DMA to be more accurate.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
 drivers/mtd/nand/raw/atmel/nand-controller.c | 2 +-
 drivers/mtd/nand/raw/brcmnand/brcmnand.c     | 2 +-
 drivers/mtd/nand/raw/denali.c                | 2 +-
 drivers/mtd/nand/raw/meson_nand.c            | 2 +-
 drivers/mtd/nand/raw/mtk_nand.c              | 2 +-
 drivers/mtd/nand/raw/nand_base.c             | 4 ++--
 drivers/mtd/nand/raw/qcom_nandc.c            | 2 +-
 drivers/mtd/nand/raw/stm32_fmc2_nand.c       | 2 +-
 drivers/mtd/nand/raw/sunxi_nand.c            | 2 +-
 drivers/mtd/nand/raw/tango_nand.c            | 2 +-
 drivers/mtd/nand/raw/tegra_nand.c            | 2 +-
 include/linux/mtd/rawnand.h                  | 2 +-
 12 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index 3ba17a98df4d..46a3724a788e 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1494,7 +1494,7 @@ static void atmel_nand_init(struct atmel_nand_controller *nc,
 	 * suitable for DMA.
 	 */
 	if (nc->dmac)
-		chip->options |= NAND_USE_BOUNCE_BUFFER;
+		chip->options |= NAND_USES_DMA;
 
 	/* Default to HW ECC if pmecc is available. */
 	if (nc->pmecc)
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index e4e3ceeac38f..949f50e5b817 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -2577,7 +2577,7 @@ static int brcmnand_attach_chip(struct nand_chip *chip)
 	 * to/from, and have nand_base pass us a bounce buffer instead, as
 	 * needed.
 	 */
-	chip->options |= NAND_USE_BOUNCE_BUFFER;
+	chip->options |= NAND_USES_DMA;
 
 	if (chip->bbt_options & NAND_BBT_USE_FLASH)
 		chip->bbt_options |= NAND_BBT_NO_OOB;
diff --git a/drivers/mtd/nand/raw/denali.c b/drivers/mtd/nand/raw/denali.c
index 6a6c919b2569..d40f9c8e2241 100644
--- a/drivers/mtd/nand/raw/denali.c
+++ b/drivers/mtd/nand/raw/denali.c
@@ -1203,7 +1203,7 @@ int denali_chip_init(struct denali_controller *denali,
 		mtd->name = "denali-nand";
 
 	if (denali->dma_avail) {
-		chip->options |= NAND_USE_BOUNCE_BUFFER;
+		chip->options |= NAND_USES_DMA;
 		chip->buf_align = 16;
 	}
 
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index e961f7bebf0a..3f376471f3f7 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -1269,7 +1269,7 @@ meson_nfc_nand_chip_init(struct device *dev,
 	nand_set_flash_node(nand, np);
 	nand_set_controller_data(nand, nfc);
 
-	nand->options |= NAND_USE_BOUNCE_BUFFER;
+	nand->options |= NAND_USES_DMA;
 	mtd = nand_to_mtd(nand);
 	mtd->owner = THIS_MODULE;
 	mtd->dev.parent = dev;
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
index ef149e8b26d0..e7ec30e784fd 100644
--- a/drivers/mtd/nand/raw/mtk_nand.c
+++ b/drivers/mtd/nand/raw/mtk_nand.c
@@ -1380,7 +1380,7 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc,
 	nand_set_flash_node(nand, np);
 	nand_set_controller_data(nand, nfc);
 
-	nand->options |= NAND_USE_BOUNCE_BUFFER | NAND_SUBPAGE_READ;
+	nand->options |= NAND_USES_DMA | NAND_SUBPAGE_READ;
 	nand->legacy.dev_ready = mtk_nfc_dev_ready;
 	nand->legacy.select_chip = mtk_nfc_select_chip;
 	nand->legacy.write_byte = mtk_nfc_write_byte;
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 27ed6189f227..82f7544f58b7 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -3191,7 +3191,7 @@ static int nand_do_read_ops(struct nand_chip *chip, loff_t from,
 
 		if (!aligned)
 			use_bufpoi = 1;
-		else if (chip->options & NAND_USE_BOUNCE_BUFFER)
+		else if (chip->options & NAND_USES_DMA)
 			use_bufpoi = !virt_addr_valid(buf) ||
 				     !IS_ALIGNED((unsigned long)buf,
 						 chip->buf_align);
@@ -4017,7 +4017,7 @@ static int nand_do_write_ops(struct nand_chip *chip, loff_t to,
 
 		if (part_pagewr)
 			use_bufpoi = 1;
-		else if (chip->options & NAND_USE_BOUNCE_BUFFER)
+		else if (chip->options & NAND_USES_DMA)
 			use_bufpoi = !virt_addr_valid(buf) ||
 				     !IS_ALIGNED((unsigned long)buf,
 						 chip->buf_align);
diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index 5b11c7061497..9ab22c5d4166 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2836,7 +2836,7 @@ static int qcom_nand_host_init_and_register(struct qcom_nand_controller *nandc,
 	chip->legacy.block_markbad	= qcom_nandc_block_markbad;
 
 	chip->controller = &nandc->controller;
-	chip->options |= NAND_NO_SUBPAGE_WRITE | NAND_USE_BOUNCE_BUFFER |
+	chip->options |= NAND_NO_SUBPAGE_WRITE | NAND_USES_DMA |
 			 NAND_SKIP_BBTSCAN;
 
 	/* set up initial status value */
diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index 46b7d04e2c87..c5fde09e0175 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -1987,7 +1987,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
 
 	chip->controller = &fmc2->base;
 	chip->options |= NAND_BUSWIDTH_AUTO | NAND_NO_SUBPAGE_WRITE |
-			 NAND_USE_BOUNCE_BUFFER;
+			 NAND_USES_DMA;
 
 	/* Default ECC settings */
 	chip->ecc.mode = NAND_ECC_HW;
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 18ac0b36abfa..26d862213cac 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1698,7 +1698,7 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
 		ecc->read_page = sunxi_nfc_hw_ecc_read_page_dma;
 		ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage_dma;
 		ecc->write_page = sunxi_nfc_hw_ecc_write_page_dma;
-		nand->options |= NAND_USE_BOUNCE_BUFFER;
+		nand->options |= NAND_USES_DMA;
 	} else {
 		ecc->read_page = sunxi_nfc_hw_ecc_read_page;
 		ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage;
diff --git a/drivers/mtd/nand/raw/tango_nand.c b/drivers/mtd/nand/raw/tango_nand.c
index 9acf2de37ee0..b92de603e6db 100644
--- a/drivers/mtd/nand/raw/tango_nand.c
+++ b/drivers/mtd/nand/raw/tango_nand.c
@@ -568,7 +568,7 @@ static int chip_init(struct device *dev, struct device_node *np)
 	chip->legacy.select_chip = tango_select_chip;
 	chip->legacy.cmd_ctrl = tango_cmd_ctrl;
 	chip->legacy.dev_ready = tango_dev_ready;
-	chip->options = NAND_USE_BOUNCE_BUFFER |
+	chip->options = NAND_USES_DMA |
 			NAND_NO_SUBPAGE_WRITE |
 			NAND_WAIT_TCCS;
 	chip->controller = &nfc->hw;
diff --git a/drivers/mtd/nand/raw/tegra_nand.c b/drivers/mtd/nand/raw/tegra_nand.c
index 6a255ba0f288..f9d046b2cd3b 100644
--- a/drivers/mtd/nand/raw/tegra_nand.c
+++ b/drivers/mtd/nand/raw/tegra_nand.c
@@ -1115,7 +1115,7 @@ static int tegra_nand_chips_init(struct device *dev,
 	if (!mtd->name)
 		mtd->name = "tegra_nand";
 
-	chip->options = NAND_NO_SUBPAGE_WRITE | NAND_USE_BOUNCE_BUFFER;
+	chip->options = NAND_NO_SUBPAGE_WRITE | NAND_USES_DMA;
 
 	ret = nand_scan(chip, 1);
 	if (ret)
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index e70fea67030b..d1f5c5258e35 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -185,7 +185,7 @@ enum nand_ecc_algo {
  * This option could be defined by controller drivers to protect against
  * kmap'ed, vmalloc'ed highmem buffers being passed from upper layers
  */
-#define NAND_USE_BOUNCE_BUFFER	BIT(20)
+#define NAND_USES_DMA		BIT(20)
 
 /*
  * In case your controller is implementing ->legacy.cmd_ctrl() and is relying
-- 
2.20.1


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