linux-kernel - Re: [PATCH v2 07/10] i2c: mt7621: Use i2c_10bit_addr_*_from

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Message-ID: <ceb1cb01-78b8-4ed4-b4fc-23fdac78ab21@collabora.com>
Date: Thu, 13 Feb 2025 17:01:20 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 Andi Shyti <andi.shyti@...nel.org>,
 Wolfram Sang <wsa+renesas@...g-engineering.com>, linux-i2c@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, linux-renesas-soc@...r.kernel.org
Cc: Krzysztof Adamski <krzysztof.adamski@...ia.com>,
 Florian Fainelli <florian.fainelli@...adcom.com>, Ray Jui
 <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Kamal Dasu
 <kamal.dasu@...adcom.com>, Stefan Roese <sr@...x.de>,
 Matthias Brugger <matthias.bgg@...il.com>,
 Gregory CLEMENT <gregory.clement@...tlin.com>,
 Fabrizio Castro <fabrizio.castro.jz@...esas.com>
Subject: Re: [PATCH v2 07/10] i2c: mt7621: Use i2c_10bit_addr_*_from_msg()
 helpers

Il 13/02/25 15:07, Andy Shevchenko ha scritto:
> Use i2c_10bit_addr_*_from_msg() helpers instead of local copy.
> No functional change intended.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Can we please do the helper conversion as one commit and the (much needed)
cleanup of assigning len and de-duplicating the call to mtk_i2c_cmd() as
two commits?

One with just the conversion, one with the cleanup (or in inverse order,
as you wish).

Thanks,
Angelo

> ---
>   drivers/i2c/busses/i2c-mt7621.c | 20 ++++++++------------
>   1 file changed, 8 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-mt7621.c b/drivers/i2c/busses/i2c-mt7621.c
> index 2103f21f9ddd..0a288c998419 100644
> --- a/drivers/i2c/busses/i2c-mt7621.c
> +++ b/drivers/i2c/busses/i2c-mt7621.c
> @@ -164,22 +164,18 @@ static int mtk_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
>   		/* write address */
>   		if (pmsg->flags & I2C_M_TEN) {
>   			/* 10 bits address */
> -			addr = 0xf0 | ((pmsg->addr >> 7) & 0x06);
> -			addr |= (pmsg->addr & 0xff) << 8;
> -			if (pmsg->flags & I2C_M_RD)
> -				addr |= 1;
> -			iowrite32(addr, i2c->base + REG_SM0D0_REG);
> -			ret = mtk_i2c_cmd(i2c, SM0CTL1_WRITE, 2);
> -			if (ret)
> -				goto err_timeout;
> +			addr = i2c_10bit_addr_hi_from_msg(pmsg);
> +			addr |= i2c_10bit_addr_lo_from_msg(pmsg) << 8;
> +			len = 2;
>   		} else {
>   			/* 7 bits address */
>   			addr = i2c_8bit_addr_from_msg(pmsg);
> -			iowrite32(addr, i2c->base + REG_SM0D0_REG);
> -			ret = mtk_i2c_cmd(i2c, SM0CTL1_WRITE, 1);
> -			if (ret)
> -				goto err_timeout;
> +			len = 1;
>   		}
> +		iowrite32(addr, i2c->base + REG_SM0D0_REG);
> +		ret = mtk_i2c_cmd(i2c, SM0CTL1_WRITE, len);
> +		if (ret)
> +			goto err_timeout;
>   
>   		/* check address ACK */
>   		if (!(pmsg->flags & I2C_M_IGNORE_NAK)) {