linux-kernel - Re: [PATCH] iio: adc: mcp3911: use correct id bits

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Message-ID: <20221015162852.74d936fd@jic23-huawei>
Date:   Sat, 15 Oct 2022 16:28:52 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Marcus Folkesson <marcus.folkesson@...il.com>
Cc:     Kent Gustavsson <kent@...oris.se>,
        Lars-Peter Clausen <lars@...afoo.de>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: adc: mcp3911: use correct id bits

On Mon, 10 Oct 2022 21:46:41 +0200
Marcus Folkesson <marcus.folkesson@...il.com> wrote:

> The device ID should be shifted 6 bits to left according to datasheet.
> 
> Fixes: 3a89b289df5d ("iio: adc: add support for mcp3911")
> Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
Applied to the the fixes-togreg branch of iio.git.

Thanks,

Jonathan
> ---
>  drivers/iio/adc/mcp3911.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c
> index e55db02c534f..2c1af11a621f 100644
> --- a/drivers/iio/adc/mcp3911.c
> +++ b/drivers/iio/adc/mcp3911.c
> @@ -57,8 +57,8 @@
>  /* Internal voltage reference in mV */
>  #define MCP3911_INT_VREF_MV		1200
>  
> -#define MCP3911_REG_READ(reg, id)	((((reg) << 1) | ((id) << 5) | (1 << 0)) & 0xff)
> -#define MCP3911_REG_WRITE(reg, id)	((((reg) << 1) | ((id) << 5) | (0 << 0)) & 0xff)
> +#define MCP3911_REG_READ(reg, id)	((((reg) << 1) | ((id) << 6) | (1 << 0)) & 0xff)
> +#define MCP3911_REG_WRITE(reg, id)	((((reg) << 1) | ((id) << 6) | (0 << 0)) & 0xff)
>  
>  #define MCP3911_NUM_CHANNELS		2
>  #define MCP3911_NUM_SCALES		6