linux-kernel - Re: [PATCH v2 3/8] mfd: intel_quark_i2c

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Date:	Thu, 1 Oct 2015 15:54:01 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	linux-acpi@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-gpio@...r.kernel.org, Wolfram Sang <wsa@...-dreams.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	Mika Westerberg <mika.westerberg@...el.com>,
	"Puustinen, Ismo" <ismo.puustinen@...el.com>,
	"Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/8] mfd: intel_quark_i2c_gpio: load gpio driver first

On Thu, 01 Oct 2015, Andy Shevchenko wrote:

> On Intel Galileo boards the GPIO expander is connected to i2c bus. Moreover it
> is able to generate interrupt, but interrupt line is connected to GPIO. That's
> why we have to have GPIO driver in place when we will probe i2c host with
> device connected to it.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/mfd/intel_quark_i2c_gpio.c | 19 +++++++++----------
>  1 file changed, 9 insertions(+), 10 deletions(-)

Acked-by: Lee Jones <lee.jones@...aro.org>

Are there build dependancies in this set?  Or can all patches filter
through their own subsystems?

> diff --git a/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c
> index 1ce1603..958c134 100644
> --- a/drivers/mfd/intel_quark_i2c_gpio.c
> +++ b/drivers/mfd/intel_quark_i2c_gpio.c
> @@ -90,19 +90,19 @@ static struct resource intel_quark_gpio_res[] = {
>  
>  static struct mfd_cell intel_quark_mfd_cells[] = {
>  	{
> -		.id = MFD_I2C_BAR,
> -		.name = "i2c_designware",
> -		.num_resources = ARRAY_SIZE(intel_quark_i2c_res),
> -		.resources = intel_quark_i2c_res,
> -		.ignore_resource_conflicts = true,
> -	},
> -	{
>  		.id = MFD_GPIO_BAR,
>  		.name = "gpio-dwapb",
>  		.num_resources = ARRAY_SIZE(intel_quark_gpio_res),
>  		.resources = intel_quark_gpio_res,
>  		.ignore_resource_conflicts = true,
>  	},
> +	{
> +		.id = MFD_I2C_BAR,
> +		.name = "i2c_designware",
> +		.num_resources = ARRAY_SIZE(intel_quark_i2c_res),
> +		.resources = intel_quark_i2c_res,
> +		.ignore_resource_conflicts = true,
> +	},
>  };
>  
>  static const struct pci_device_id intel_quark_mfd_ids[] = {
> @@ -248,12 +248,11 @@ static int intel_quark_mfd_probe(struct pci_dev *pdev,
>  
>  	dev_set_drvdata(&pdev->dev, quark_mfd);
>  
> -	ret = intel_quark_i2c_setup(pdev, &intel_quark_mfd_cells[MFD_I2C_BAR]);
> +	ret = intel_quark_i2c_setup(pdev, &intel_quark_mfd_cells[1]);
>  	if (ret)
>  		return ret;
>  
> -	ret = intel_quark_gpio_setup(pdev,
> -				     &intel_quark_mfd_cells[MFD_GPIO_BAR]);
> +	ret = intel_quark_gpio_setup(pdev, &intel_quark_mfd_cells[0]);
>  	if (ret)
>  		return ret;
>  

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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