linux-kernel - Re: [PATCH v1 1/2] mfd: da9052: Fix register access via SPI

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Date:	Wed, 4 Mar 2015 18:44:58 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Adam Ward <adam.ward.opensource@...semi.com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Support Opensource <support.opensource@...semi.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] mfd: da9052: Fix register access via SPI

On Wed, 04 Mar 2015, Adam Ward wrote:

> The range of registers used by this driver exceeds that available
> via SPI with no paging (127), so we have to override the values
> from the default config which is set-up for I2C access.
> Also change SPI settings to match device's recommended OTP values.
> 
> Signed-off-by: Adam Ward <adam.ward.opensource@...semi.com>
> Tested-by: Adam Ward <adam.ward.opensource@...semi.com>

I'd be worried if you hadn't tested it.

In future, Signed-off-by is sufficient.

Patch applied, thanks.

> ---
>  drivers/mfd/da9052-spi.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/da9052-spi.c b/drivers/mfd/da9052-spi.c
> index 45ae0b7..b5de8a6 100644
> --- a/drivers/mfd/da9052-spi.c
> +++ b/drivers/mfd/da9052-spi.c
> @@ -32,7 +32,7 @@ static int da9052_spi_probe(struct spi_device *spi)
>  	if (!da9052)
>  		return -ENOMEM;
> 
> -	spi->mode = SPI_MODE_0 | SPI_CPOL;
> +	spi->mode = SPI_MODE_0;
>  	spi->bits_per_word = 8;
>  	spi_setup(spi);
> 
> @@ -43,6 +43,10 @@ static int da9052_spi_probe(struct spi_device *spi)
> 
>  	config = da9052_regmap_config;
>  	config.read_flag_mask = 1;
> +	config.reg_bits = 7;
> +	config.pad_bits = 1;
> +	config.val_bits = 8;
> +	config.use_single_rw = 1;
> 
>  	da9052->regmap = devm_regmap_init_spi(spi, &config);
>  	if (IS_ERR(da9052->regmap)) {

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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