linux-kernel - Re: [PATCH 17/22] mfd: sun6i-prcm: Add support for Allwinner A23 PRCM

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Message-ID: <20140525191434.GX10768@lukather>
Date:	Sun, 25 May 2014 21:14:34 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mike Turquette <mturquette@...aro.org>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Hans de Goede <hdegoede@...hat.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Luc Verhaegen <libv@...net.be>
Subject: Re: [PATCH 17/22] mfd: sun6i-prcm: Add support for Allwinner A23 PRCM

On Fri, May 23, 2014 at 03:51:20PM +0800, Chen-Yu Tsai wrote:
> The Allwinner A23 SoC has a PRCM unit like the previous A31 SoC.
> The differences are the AR100 clock can no longer be modified,
> and the APB0 clock has different divisors.
> 
> This patch adds a compatible with a modified subdevice list for
> the A23.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>  .../devicetree/bindings/mfd/sun6i-prcm.txt         |  2 +-
>  drivers/mfd/sun6i-prcm.c                           | 30 ++++++++++++++++++++++
>  2 files changed, 31 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt b/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt
> index 1f5a31f..03c5a55 100644
> --- a/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt
> +++ b/Documentation/devicetree/bindings/mfd/sun6i-prcm.txt
> @@ -4,7 +4,7 @@ PRCM is an MFD device exposing several Power Management related devices
>  (like clks and reset controllers).
>  
>  Required properties:
> - - compatible: "allwinner,sun6i-a31-prcm"
> + - compatible: "allwinner,sun6i-a31-prcm" or "allwinner,sun8i-a23-prcm"
>   - reg: The PRCM registers range
>  
>  The prcm node may contain several subdevices definitions:
> diff --git a/drivers/mfd/sun6i-prcm.c b/drivers/mfd/sun6i-prcm.c
> index 718fc4d..c96bb6c 100644
> --- a/drivers/mfd/sun6i-prcm.c
> +++ b/drivers/mfd/sun6i-prcm.c
> @@ -76,16 +76,46 @@ static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
>  	},
>  };
>  
> +static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
> +	{
> +		.name = "sun6i-a31-apb0-clk",
> +		.of_compatible = "allwinner,sun8i-a23-apb0-clk",
> +		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
> +		.resources = sun6i_a31_apb0_clk_res,
> +	},
> +	{
> +		.name = "sun6i-a31-apb0-gates-clk",
> +		.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
> +		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
> +		.resources = sun6i_a31_apb0_gates_clk_res,
> +	},

Did I just have a brainfart, or didn't you just introduced an
sun8i-a23-apb0-gates-clk driver?

And there's no ar100 and ahb0 clocks ?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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