linux-kernel - Re: [RFC][PATCH 4/4] RTC: SMBus support for the M41T80

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Date:	Mon, 12 May 2008 11:45:44 +0900 (JST)
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	macro@...ux-mips.org
Cc:	khali@...ux-fr.org, david-b@...bell.net, a.zummo@...ertech.it,
	ab@...able.de, anemo@....ocn.ne.jp, i2c@...sensors.org,
	rtc-linux@...glegroups.com, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 4/4] RTC: SMBus support for the M41T80

On Sun, 11 May 2008 02:59:34 +0100 (BST), "Maciej W. Rozycki" <macro@...ux-mips.org> wrote:
>  If we agree on this one, I will retest and submit the whole batch again,
> updated as needed.

Works OK for me (m41t80 + i2c-gpio).

Tested-by: Atsushi Nemoto <anemo@....ocn.ne.jp>

One minor style comment.

> +	if (i2c_check_functionality(client->adapter,
> +				    I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) {
> +		i = i2c_smbus_write_i2c_block_data(client, reg, num, buf);
> +	} else {
> +		for (i = 0; i < num; i++) {
> +			rc = i2c_smbus_write_byte_data(client, reg + i,
> +						       buf[i]);
> +			if (rc < 0) {
> +				i = rc;
> +				goto out;
> +			}
> +		}
>  	}
> +out:
> +	return i;

This part can be a bit shorter.

	if (i2c_check_functionality(client->adapter,
				    I2C_FUNC_SMBUS_WRITE_I2C_BLOCK))
		return i2c_smbus_write_i2c_block_data(client, reg, num, buf);
	for (i = 0; i < num; i++) {
		rc = i2c_smbus_write_byte_data(client, reg + i, buf[i]);
		if (rc < 0)
			return rc;
	}
	return i;

Saves 6 lines.  Not a big issue.

---
Atsushi Nemoto

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