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Message-ID: <20120904162812.GB16877@roeck-us.net>
Date: Tue, 4 Sep 2012 09:28:12 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Christophe Leroy <christophe.leroy@....fr>
Cc: Jean Delvare <khali@...ux-fr.org>, linux-kernel@...r.kernel.org,
lm-sensors@...sensors.org
Subject: Re: [PATCH 1/2] hwmon/lm70: Allow 4wire SPI bus with LM70
On Tue, Sep 04, 2012 at 10:40:44AM +0200, Christophe Leroy wrote:
> Removing the 3wire limitation on LM70 as the component also allows
> operation on 4wire SPI bus
>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
>
Applied to -next.
Thanks,
Guenter
> diff -u linux-3.5-vanilla/drivers/hwmon/lm70.c linux-3.5/drivers/hwmon/lm70.c
> --- linux-3.5-vanilla/drivers/hwmon/lm70.c 2012-07-21 22:58:29.000000000 +0200
> +++ linux-3.5/drivers/hwmon/lm70.c 2012-08-25 00:35:40.000000000 +0200
> @@ -143,10 +143,6 @@
> if (spi->mode & (SPI_CPOL | SPI_CPHA))
> return -EINVAL;
>
> - /* 3-wire link (shared SI/SO) for LM70 */
> - if (chip == LM70_CHIP_LM70 && !(spi->mode & SPI_3WIRE))
> - return -EINVAL;
> -
> /* NOTE: we assume 8-bit words, and convert to 16 bits manually */
>
> p_lm70 = kzalloc(sizeof *p_lm70, GFP_KERNEL);
> diff -u linux-3.5-vanilla/Documentation/hwmon/lm70 linux-3.5/Documentation/hwmon/lm70
> --- linux-3.5-vanilla/Documentation/hwmon/lm70 2012-07-21 22:58:29.000000000 +0200
> +++ linux-3.5/Documentation/hwmon/lm70 2012-08-25 00:37:15.000000000 +0200
> @@ -31,9 +31,8 @@
> with a "SPI master controller driver", see drivers/spi/spi_lm70llp.c
> and its associated documentation.
>
> -The TMP121/TMP123 are very similar; main differences are 4 wire SPI inter-
> -face (read only) and 13-bit temperature data (0.0625 degrees celsius reso-
> -lution).
> +The TMP121/TMP123 are very similar; main difference is 13-bit temperature
> +data (0.0625 degrees celsius resolution).
>
> Thanks to
> ---------
>
--
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