[PATCH] i2c: busses: Use min() to improve code

[PATCH] i2c: busses: Use min() to improve code

[Qianfeng Rong]

Use min() to reduce the code and improve its readability.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
---
 drivers/i2c/busses/i2c-st.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/i2c/busses/i2c-st.c b/drivers/i2c/busses/i2c-st.c
index 750fff3d2389..3373a828b5a0 100644
--- a/drivers/i2c/busses/i2c-st.c
+++ b/drivers/i2c/busses/i2c-st.c
@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
+#include <linux/minmax.h>
 
 /* SSC registers */
 #define SSC_BRG				0x000
@@ -422,10 +423,7 @@ static void st_i2c_wr_fill_tx_fifo(struct st_i2c_dev *i2c_dev)
 	tx_fstat = readl_relaxed(i2c_dev->base + SSC_TX_FSTAT);
 	tx_fstat &= SSC_TX_FSTAT_STATUS;
 
-	if (c->count < (SSC_TXFIFO_SIZE - tx_fstat))
-		i = c->count;
-	else
-		i = SSC_TXFIFO_SIZE - tx_fstat;
+	i = min(c->count, SSC_TXFIFO_SIZE - tx_fstat);
 
 	for (; i > 0; i--, c->count--, c->buf++)
 		st_i2c_write_tx_fifo(i2c_dev, *c->buf);
@@ -452,10 +450,7 @@ static void st_i2c_rd_fill_tx_fifo(struct st_i2c_dev *i2c_dev, int max)
 	tx_fstat = readl_relaxed(i2c_dev->base + SSC_TX_FSTAT);
 	tx_fstat &= SSC_TX_FSTAT_STATUS;
 
-	if (max < (SSC_TXFIFO_SIZE - tx_fstat))
-		i = max;
-	else
-		i = SSC_TXFIFO_SIZE - tx_fstat;
+	i = min(max, SSC_TXFIFO_SIZE - tx_fstat);
 
 	for (; i > 0; i--, c->xfered++)
 		st_i2c_write_tx_fifo(i2c_dev, 0xff);
-- 
2.34.1

Re: [PATCH] i2c: busses: Use min() to improve code

[Andi Shyti]

Hi Qianfeng,

> @@ -422,10 +423,7 @@ static void st_i2c_wr_fill_tx_fifo(struct st_i2c_dev *i2c_dev)
>  	tx_fstat = readl_relaxed(i2c_dev->base + SSC_TX_FSTAT);
>  	tx_fstat &= SSC_TX_FSTAT_STATUS;
>  
> -	if (c->count < (SSC_TXFIFO_SIZE - tx_fstat))
> -		i = c->count;
> -	else
> -		i = SSC_TXFIFO_SIZE - tx_fstat;
> +	i = min(c->count, SSC_TXFIFO_SIZE - tx_fstat);

I think it's safe enough not to need a min_t(int,...

merged to i2c/i2c-host.

Thanks,
Andi

Re: [PATCH] i2c: busses: Use min() to improve code

[Patrice CHOTARD]

On 6/19/25 16:26, Qianfeng Rong wrote:
> Use min() to reduce the code and improve its readability.
> 
> Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
> ---
>  drivers/i2c/busses/i2c-st.c | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-st.c b/drivers/i2c/busses/i2c-st.c
> index 750fff3d2389..3373a828b5a0 100644
> --- a/drivers/i2c/busses/i2c-st.c
> +++ b/drivers/i2c/busses/i2c-st.c
> @@ -19,6 +19,7 @@
>  #include <linux/of.h>
>  #include <linux/pinctrl/consumer.h>
>  #include <linux/platform_device.h>
> +#include <linux/minmax.h>
>  
>  /* SSC registers */
>  #define SSC_BRG				0x000
> @@ -422,10 +423,7 @@ static void st_i2c_wr_fill_tx_fifo(struct st_i2c_dev *i2c_dev)
>  	tx_fstat = readl_relaxed(i2c_dev->base + SSC_TX_FSTAT);
>  	tx_fstat &= SSC_TX_FSTAT_STATUS;
>  
> -	if (c->count < (SSC_TXFIFO_SIZE - tx_fstat))
> -		i = c->count;
> -	else
> -		i = SSC_TXFIFO_SIZE - tx_fstat;
> +	i = min(c->count, SSC_TXFIFO_SIZE - tx_fstat);
>  
>  	for (; i > 0; i--, c->count--, c->buf++)
>  		st_i2c_write_tx_fifo(i2c_dev, *c->buf);
> @@ -452,10 +450,7 @@ static void st_i2c_rd_fill_tx_fifo(struct st_i2c_dev *i2c_dev, int max)
>  	tx_fstat = readl_relaxed(i2c_dev->base + SSC_TX_FSTAT);
>  	tx_fstat &= SSC_TX_FSTAT_STATUS;
>  
> -	if (max < (SSC_TXFIFO_SIZE - tx_fstat))
> -		i = max;
> -	else
> -		i = SSC_TXFIFO_SIZE - tx_fstat;
> +	i = min(max, SSC_TXFIFO_SIZE - tx_fstat);
>  
>  	for (; i > 0; i--, c->xfered++)
>  		st_i2c_write_tx_fifo(i2c_dev, 0xff);


Hi Qianfeng

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

Thanks
Patrice