[RFC,v2,08/12] mtd: rawnand: ams-delta: Simplify pointer resolution on read/write

Message ID 20180806222918.12644-9-jmkrzyszt@gmail.com
State New
Headers show
Series
  • [RFC,v2,01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent, not mtd->owner
Related show

Commit Message

Janusz Krzysztofik Aug. 6, 2018, 10:29 p.m.
Simplify data read/write sub-functions by changing their APIs so they
accept driver private structure pointer instead of mtd_info.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
---
 drivers/mtd/nand/raw/ams-delta.c | 40 ++++++++++++++++++++++------------------
 1 file changed, 22 insertions(+), 18 deletions(-)

Comments

Boris Brezillon Aug. 7, 2018, 5:02 p.m. | #1
On Tue,  7 Aug 2018 00:29:14 +0200
Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote:

> Simplify data read/write sub-functions by changing their APIs so they
> accept driver private structure pointer instead of mtd_info.
> 
> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>

Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>

Can you move that one earlier in the series so that it can be applied
even if we're still discussing the GPIO bitmap changes?

> ---
>  drivers/mtd/nand/raw/ams-delta.c | 40 ++++++++++++++++++++++------------------
>  1 file changed, 22 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c
> index d02c48c013e8..30c461138195 100644
> --- a/drivers/mtd/nand/raw/ams-delta.c
> +++ b/drivers/mtd/nand/raw/ams-delta.c
> @@ -76,10 +76,8 @@ static void ams_delta_write_commit(struct ams_delta_nand *priv)
>  	gpiod_set_value(priv->gpiod_nwe, 1);
>  }
>  
> -static void ams_delta_write_next_byte(struct mtd_info *mtd, u_char byte)
> +static void ams_delta_write_next_byte(struct ams_delta_nand *priv, u_char byte)
>  {
> -	struct nand_chip *this = mtd_to_nand(mtd);
> -	struct ams_delta_nand *priv = nand_get_controller_data(this);
>  	struct gpio_descs *data_gpiods = priv->data_gpiods;
>  	unsigned long bits = byte;
>  	int i, value_array[data_gpiods->ndescs];
> @@ -93,10 +91,8 @@ static void ams_delta_write_next_byte(struct mtd_info *mtd, u_char byte)
>  	ams_delta_write_commit(priv);
>  }
>  
> -static void ams_delta_write_byte(struct mtd_info *mtd, u_char byte)
> +static void ams_delta_write_first_byte(struct ams_delta_nand *priv, u_char byte)
>  {
> -	struct nand_chip *this = mtd_to_nand(mtd);
> -	struct ams_delta_nand *priv = nand_get_controller_data(this);
>  	struct gpio_descs *data_gpiods = priv->data_gpiods;
>  	unsigned long bits = byte;
>  	int i;
> @@ -108,10 +104,8 @@ static void ams_delta_write_byte(struct mtd_info *mtd, u_char byte)
>  	ams_delta_write_commit(priv);
>  }
>  
> -static u_char ams_delta_read_next_byte(struct mtd_info *mtd)
> +static u_char ams_delta_read_next_byte(struct ams_delta_nand *priv)
>  {
> -	struct nand_chip *this = mtd_to_nand(mtd);
> -	struct ams_delta_nand *priv = nand_get_controller_data(this);
>  	struct gpio_descs *data_gpiods = priv->data_gpiods;
>  	unsigned long bits = 0;
>  	int i, value_array[data_gpiods->ndescs];
> @@ -131,38 +125,48 @@ static u_char ams_delta_read_next_byte(struct mtd_info *mtd)
>  	return bits;
>  }
>  
> -static u_char ams_delta_read_byte(struct mtd_info *mtd)
> +static u_char ams_delta_read_first_byte(struct ams_delta_nand *priv)
>  {
> -	struct nand_chip *this = mtd_to_nand(mtd);
> -	struct ams_delta_nand *priv = nand_get_controller_data(this);
>  	struct gpio_descs *data_gpiods = priv->data_gpiods;
>  	int i;
>  
>  	for (i = 0; i < data_gpiods->ndescs; i++)
>  		gpiod_direction_input(data_gpiods->desc[i]);
>  
> -	return ams_delta_read_next_byte(mtd);
> +	return ams_delta_read_next_byte(priv);
> +}
> +
> +static u_char ams_delta_read_byte(struct mtd_info *mtd)
> +{
> +	struct nand_chip *this = mtd_to_nand(mtd);
> +	struct ams_delta_nand *priv = nand_get_controller_data(this);
> +
> +	return ams_delta_read_first_byte(priv);
>  }
>  
>  static void ams_delta_write_buf(struct mtd_info *mtd, const u_char *buf,
>  				int len)
>  {
> +	struct nand_chip *this = mtd_to_nand(mtd);
> +	struct ams_delta_nand *priv = nand_get_controller_data(this);
>  	int i;
>  
>  	if (len > 0)
> -		ams_delta_write_byte(mtd, buf[0]);
> +		ams_delta_write_first_byte(priv, buf[0]);
>  	for (i = 1; i < len; i++)
> -		ams_delta_write_next_byte(mtd, buf[i]);
> +		ams_delta_write_next_byte(priv, buf[i]);
>  }
>  
>  static void ams_delta_read_buf(struct mtd_info *mtd, u_char *buf, int len)
>  {
> +	struct nand_chip *this = mtd_to_nand(mtd);
> +	struct ams_delta_nand *priv = nand_get_controller_data(this);
>  	int i;
>  
>  	if (len > 0)
> -		buf[0] = ams_delta_read_byte(mtd);
> +		buf[0] = ams_delta_read_first_byte(priv);
>  	for (i = 1; i < len; i++)
> -		buf[i] = ams_delta_read_next_byte(mtd);
> +		buf[i] = ams_delta_read_next_byte(priv);
>  }
>  
>  /*
> @@ -186,7 +190,7 @@ static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd,
>  	}
>  
>  	if (cmd != NAND_CMD_NONE)
> -		ams_delta_write_byte(mtd, cmd);
> +		ams_delta_write_first_byte(priv, cmd);
>  }
>  
>  static int ams_delta_nand_ready(struct mtd_info *mtd)

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Janusz Krzysztofik Aug. 7, 2018, 5:15 p.m. | #2
On Tuesday, August 7, 2018 7:02:56 PM CEST Boris Brezillon wrote:
> On Tue,  7 Aug 2018 00:29:14 +0200
> Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote:
> 
> > Simplify data read/write sub-functions by changing their APIs so they
> > accept driver private structure pointer instead of mtd_info.
> > 
> > Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
> 
> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
> 
> Can you move that one earlier in the series so that it can be applied
> even if we're still discussing the GPIO bitmap changes?

Sure, I will, and I would be still more happy if you agreed on me doing the 
same with [RFC PATCH v2 07/12] mtd: rawnand: ams-delta: Set port direction 
once per transfer.

Thanks,
Janusz


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Patch

diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c
index d02c48c013e8..30c461138195 100644
--- a/drivers/mtd/nand/raw/ams-delta.c
+++ b/drivers/mtd/nand/raw/ams-delta.c
@@ -76,10 +76,8 @@  static void ams_delta_write_commit(struct ams_delta_nand *priv)
 	gpiod_set_value(priv->gpiod_nwe, 1);
 }
 
-static void ams_delta_write_next_byte(struct mtd_info *mtd, u_char byte)
+static void ams_delta_write_next_byte(struct ams_delta_nand *priv, u_char byte)
 {
-	struct nand_chip *this = mtd_to_nand(mtd);
-	struct ams_delta_nand *priv = nand_get_controller_data(this);
 	struct gpio_descs *data_gpiods = priv->data_gpiods;
 	unsigned long bits = byte;
 	int i, value_array[data_gpiods->ndescs];
@@ -93,10 +91,8 @@  static void ams_delta_write_next_byte(struct mtd_info *mtd, u_char byte)
 	ams_delta_write_commit(priv);
 }
 
-static void ams_delta_write_byte(struct mtd_info *mtd, u_char byte)
+static void ams_delta_write_first_byte(struct ams_delta_nand *priv, u_char byte)
 {
-	struct nand_chip *this = mtd_to_nand(mtd);
-	struct ams_delta_nand *priv = nand_get_controller_data(this);
 	struct gpio_descs *data_gpiods = priv->data_gpiods;
 	unsigned long bits = byte;
 	int i;
@@ -108,10 +104,8 @@  static void ams_delta_write_byte(struct mtd_info *mtd, u_char byte)
 	ams_delta_write_commit(priv);
 }
 
-static u_char ams_delta_read_next_byte(struct mtd_info *mtd)
+static u_char ams_delta_read_next_byte(struct ams_delta_nand *priv)
 {
-	struct nand_chip *this = mtd_to_nand(mtd);
-	struct ams_delta_nand *priv = nand_get_controller_data(this);
 	struct gpio_descs *data_gpiods = priv->data_gpiods;
 	unsigned long bits = 0;
 	int i, value_array[data_gpiods->ndescs];
@@ -131,38 +125,48 @@  static u_char ams_delta_read_next_byte(struct mtd_info *mtd)
 	return bits;
 }
 
-static u_char ams_delta_read_byte(struct mtd_info *mtd)
+static u_char ams_delta_read_first_byte(struct ams_delta_nand *priv)
 {
-	struct nand_chip *this = mtd_to_nand(mtd);
-	struct ams_delta_nand *priv = nand_get_controller_data(this);
 	struct gpio_descs *data_gpiods = priv->data_gpiods;
 	int i;
 
 	for (i = 0; i < data_gpiods->ndescs; i++)
 		gpiod_direction_input(data_gpiods->desc[i]);
 
-	return ams_delta_read_next_byte(mtd);
+	return ams_delta_read_next_byte(priv);
+}
+
+static u_char ams_delta_read_byte(struct mtd_info *mtd)
+{
+	struct nand_chip *this = mtd_to_nand(mtd);
+	struct ams_delta_nand *priv = nand_get_controller_data(this);
+
+	return ams_delta_read_first_byte(priv);
 }
 
 static void ams_delta_write_buf(struct mtd_info *mtd, const u_char *buf,
 				int len)
 {
+	struct nand_chip *this = mtd_to_nand(mtd);
+	struct ams_delta_nand *priv = nand_get_controller_data(this);
 	int i;
 
 	if (len > 0)
-		ams_delta_write_byte(mtd, buf[0]);
+		ams_delta_write_first_byte(priv, buf[0]);
 	for (i = 1; i < len; i++)
-		ams_delta_write_next_byte(mtd, buf[i]);
+		ams_delta_write_next_byte(priv, buf[i]);
 }
 
 static void ams_delta_read_buf(struct mtd_info *mtd, u_char *buf, int len)
 {
+	struct nand_chip *this = mtd_to_nand(mtd);
+	struct ams_delta_nand *priv = nand_get_controller_data(this);
 	int i;
 
 	if (len > 0)
-		buf[0] = ams_delta_read_byte(mtd);
+		buf[0] = ams_delta_read_first_byte(priv);
 	for (i = 1; i < len; i++)
-		buf[i] = ams_delta_read_next_byte(mtd);
+		buf[i] = ams_delta_read_next_byte(priv);
 }
 
 /*
@@ -186,7 +190,7 @@  static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd,
 	}
 
 	if (cmd != NAND_CMD_NONE)
-		ams_delta_write_byte(mtd, cmd);
+		ams_delta_write_first_byte(priv, cmd);
 }
 
 static int ams_delta_nand_ready(struct mtd_info *mtd)