linux-kernel - Re: [PATCH v3 1/2] mfd: intel_quark_i2c_gpio: Use dmi_system

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Date:   Tue, 30 May 2017 11:13:50 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Jan Kiszka <jan.kiszka@...mens.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Sascha Weisenberger <sascha.weisenberger@...mens.com>
Subject: Re: [PATCH v3 1/2] mfd: intel_quark_i2c_gpio: Use dmi_system_id
 table for retrieving frequency

On Tue, 30 May 2017, Jan Kiszka wrote:

> Avoids reimplementation of DMI matching in intel_quark_i2c_setup.
> 
> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/mfd/intel_quark_i2c_gpio.c | 33 +++++++++++++--------------------
>  1 file changed, 13 insertions(+), 20 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c
> index 7946d6e38b87..050061320377 100644
> --- a/drivers/mfd/intel_quark_i2c_gpio.c
> +++ b/drivers/mfd/intel_quark_i2c_gpio.c
> @@ -58,19 +58,18 @@ struct intel_quark_mfd {
>  	struct clk_lookup	*i2c_clk_lookup;
>  };
>  
> -struct i2c_mode_info {
> -	const char *name;
> -	unsigned int i2c_scl_freq;
> -};
> -
> -static const struct i2c_mode_info platform_i2c_mode_info[] = {
> +static const struct dmi_system_id dmi_platform_info[] = {
>  	{
> -		.name = "Galileo",
> -		.i2c_scl_freq = 100000,
> +		.matches = {
> +			DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo"),
> +		},
> +		.driver_data = (void *)100000,
>  	},
>  	{
> -		.name = "GalileoGen2",
> -		.i2c_scl_freq = 400000,
> +		.matches = {
> +			DMI_EXACT_MATCH(DMI_BOARD_NAME, "GalileoGen2"),
> +		},
> +		.driver_data = (void *)400000,
>  	},
>  	{}
>  };
> @@ -160,8 +159,7 @@ static void intel_quark_unregister_i2c_clk(struct device *dev)
>  
>  static int intel_quark_i2c_setup(struct pci_dev *pdev, struct mfd_cell *cell)
>  {
> -	const char *board_name = dmi_get_system_info(DMI_BOARD_NAME);
> -	const struct i2c_mode_info *info;
> +	const struct dmi_system_id *dmi_id;
>  	struct dw_i2c_platform_data *pdata;
>  	struct resource *res = (struct resource *)cell->resources;
>  	struct device *dev = &pdev->dev;
> @@ -181,14 +179,9 @@ static int intel_quark_i2c_setup(struct pci_dev *pdev, struct mfd_cell *cell)
>  	/* Normal mode by default */
>  	pdata->i2c_scl_freq = 100000;
>  
> -	if (board_name) {
> -		for (info = platform_i2c_mode_info; info->name; info++) {
> -			if (!strcmp(board_name, info->name)) {
> -				pdata->i2c_scl_freq = info->i2c_scl_freq;
> -				break;
> -			}
> -		}
> -	}
> +	dmi_id = dmi_first_match(dmi_platform_info);
> +	if (dmi_id)
> +		pdata->i2c_scl_freq = (uintptr_t)dmi_id->driver_data;
>  
>  	cell->platform_data = pdata;
>  	cell->pdata_size = sizeof(*pdata);

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