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From: Corey Minyard <cminyard@mvista.com>
To: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
Cc: "Signed-off-by : Frederic Konrad" <frederic.konrad@adacore.com>,
	qemu-arm@nongnu.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [PATCH v3 06/13] hw/i2c/ppc4xx_i2c: Replace i2c_send_recv() by i2c_recv() & i2c_send()
Date: Wed, 16 Jun 2021 14:16:37 -0500	[thread overview]
Message-ID: <20210616191637.GF11196@minyard.net> (raw)
In-Reply-To: <20210616161418.2514095-7-f4bug@amsat.org>

On Wed, Jun 16, 2021 at 06:14:11PM +0200, Philippe Mathieu-Daudé wrote:
> Instead of using the confuse i2c_send_recv(), rewrite to directly
> call i2c_recv() & i2c_send(), resulting in code easire to review.
> 
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  hw/i2c/ppc4xx_i2c.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/i2c/ppc4xx_i2c.c b/hw/i2c/ppc4xx_i2c.c
> index f4c5bc12d36..b3d3da56e38 100644
> --- a/hw/i2c/ppc4xx_i2c.c
> +++ b/hw/i2c/ppc4xx_i2c.c
> @@ -240,11 +240,14 @@ static void ppc4xx_i2c_writeb(void *opaque, hwaddr addr, uint64_t value,
>                          i2c->sts &= ~IIC_STS_ERR;
>                      }
>                  }
> -                if (!(i2c->sts & IIC_STS_ERR) &&
> -                    i2c_send_recv(i2c->bus, &i2c->mdata[i], !recv)) {
> -                    i2c->sts |= IIC_STS_ERR;
> -                    i2c->extsts |= IIC_EXTSTS_XFRA;
> -                    break;
> +                if (!(i2c->sts & IIC_STS_ERR)) {
> +                    if (recv) {
> +                        i2c->mdata[i] = i2c_recv(i2c->bus);
> +                    } else if (i2c_send(i2c->bus, i2c->mdata[i])) {

In the previous patch you checked < 0, it would be nice to be
consistent.

-corey

> +                        i2c->sts |= IIC_STS_ERR;
> +                        i2c->extsts |= IIC_EXTSTS_XFRA;
> +                        break;
> +                    }
>                  }
>                  if (value & IIC_CNTL_RPST || !(value & IIC_CNTL_CHT)) {
>                      i2c_end_transfer(i2c->bus);
> -- 
> 2.31.1
> 


  parent reply	other threads:[~2021-06-16 19:18 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 16:14 [PATCH v3 00/13] hw/i2c: Remove confusing i2c_send_recv() API Philippe Mathieu-Daudé
2021-06-16 16:14 ` [PATCH v3 01/13] hw/input/lm832x: Move lm832x_key_event() declaration to "lm832x.h" Philippe Mathieu-Daudé
2021-06-16 18:38   ` Richard Henderson
2021-06-16 19:23     ` Philippe Mathieu-Daudé
2021-06-16 16:14 ` [PATCH v3 02/13] hw/input/lm832x: Define TYPE_LM8323 in public header Philippe Mathieu-Daudé
2021-06-16 18:39   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 03/13] hw/display/sm501: Simplify sm501_i2c_write() logic Philippe Mathieu-Daudé
2021-06-16 18:39   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 04/13] hw/display/sm501: Replace i2c_send_recv() by i2c_recv() & i2c_send() Philippe Mathieu-Daudé
2021-06-16 18:40   ` Richard Henderson
2021-06-16 19:14   ` Corey Minyard
2021-06-16 16:14 ` [PATCH v3 05/13] hw/i2c/ppc4xx_i2c: Add reference to datasheet Philippe Mathieu-Daudé
2021-06-16 18:40   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 06/13] hw/i2c/ppc4xx_i2c: Replace i2c_send_recv() by i2c_recv() & i2c_send() Philippe Mathieu-Daudé
2021-06-16 18:41   ` Richard Henderson
2021-06-16 19:16   ` Corey Minyard [this message]
2021-06-16 19:25     ` Philippe Mathieu-Daudé
2021-06-16 20:01       ` BALATON Zoltan
2021-06-16 20:28         ` Philippe Mathieu-Daudé
2021-06-16 23:09           ` BALATON Zoltan
2021-06-16 23:42             ` Corey Minyard
2021-06-17 23:49           ` BALATON Zoltan
2021-06-18  8:54             ` Philippe Mathieu-Daudé
2021-06-16 16:14 ` [PATCH v3 07/13] hw/misc/auxbus: Fix MOT/classic I2C mode Philippe Mathieu-Daudé
2021-06-16 18:41   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 08/13] hw/misc/auxbus: Explode READ_I2C / WRITE_I2C_MOT cases Philippe Mathieu-Daudé
2021-06-16 18:41   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 09/13] hw/misc/auxbus: Replace 'is_write' boolean by its value Philippe Mathieu-Daudé
2021-06-16 18:43   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 10/13] hw/misc/auxbus: Replace i2c_send_recv() by i2c_recv() & i2c_send() Philippe Mathieu-Daudé
2021-06-16 18:46   ` Richard Henderson
2021-06-16 19:28     ` Philippe Mathieu-Daudé
2021-06-16 20:06       ` BALATON Zoltan
2021-06-16 16:14 ` [PATCH v3 11/13] hw/i2c: Remove confusing i2c_send_recv() Philippe Mathieu-Daudé
2021-06-16 18:47   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 12/13] hw/i2c: Rename i2c_set_slave_address() -> i2c_slave_set_address() Philippe Mathieu-Daudé
2021-06-16 18:50   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 13/13] hw/i2c: Make i2c_start_transfer() direction argument a boolean Philippe Mathieu-Daudé
2021-06-16 19:02   ` Richard Henderson
2021-06-16 19:28 ` [PATCH v3 00/13] hw/i2c: Remove confusing i2c_send_recv() API Corey Minyard

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