linux-kernel - Re: [PATCH 1/2] isp1704

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Date:	Thu, 14 Nov 2013 09:52:27 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Sebastian Reichel <sre@...ian.org>
Cc:	Anton Vorontsov <anton@...msg.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Pali Rohár <pali.rohar@...il.com>
Subject: Re: [PATCH 1/2] isp1704_charger: Add DT support

* Sebastian Reichel <sre@...ian.org> [131114 04:40]:
> This patch introduces device tree support to the isp1704
> charger driver. Adding support involved moving the handling
> of the enable GPIO from board code into the driver.
> 
> Signed-off-by: Sebastian Reichel <sre@...ian.org>
> ---
>  arch/arm/mach-omap2/board-rx51-peripherals.c | 10 +----
>  drivers/power/isp1704_charger.c              | 56 +++++++++++++++++++++++++---
>  include/linux/power/isp1704_charger.h        |  2 +-
>  3 files changed, 52 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c
> index a791fef..2986d16 100644
> --- a/arch/arm/mach-omap2/board-rx51-peripherals.c
> +++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
> @@ -273,13 +273,8 @@ static struct platform_device rx51_battery_device = {
>  	.id	= -1,
>  };
>  
> -static void rx51_charger_set_power(bool on)
> -{
> -	gpio_set_value(RX51_USB_TRANSCEIVER_RST_GPIO, on);
> -}
> -
>  static struct isp1704_charger_data rx51_charger_data = {
> -	.set_power	= rx51_charger_set_power,
> +	.enable_gpio	= RX51_USB_TRANSCEIVER_RST_GPIO,
>  };
>  
>  static struct platform_device rx51_charger_device = {
> @@ -291,9 +286,6 @@ static struct platform_device rx51_charger_device = {
>  
>  static void __init rx51_charger_init(void)
>  {
> -	WARN_ON(gpio_request_one(RX51_USB_TRANSCEIVER_RST_GPIO,
> -		GPIOF_OUT_INIT_HIGH, "isp1704_reset"));
> -
>  	platform_device_register(&rx51_battery_device);
>  	platform_device_register(&rx51_charger_device);
>  }

Can you please separate out the changes to board-rx51-peripherals.c
as they have a huge chance of merge conflicts for v3.14 when
we're planning to flip omap3 to be device tree only?

To remove the dependency, how about add .enable_gpio to the
isp1704_charger.h and to the board-rx51-peripherals.c without
removing .set_power in the first patch?

Then we can set up an immutable branch that can be merged both
to linux-omap tree and Anton's tree to avoid merge conflicts.

Then the rest of the patches can go via Anton's tree and you
can just have .set_power do nothing, and then it can be
removed later on when no longer used at all.

Regards,

Tony
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