[PATCH v3 02/13] clk: sunxi: Add mod0 and mmc module clock support for A80

[maxime.ripard@free-electrons.com (Maxime Ripard)]

On Tue, Jan 13, 2015 at 09:37:24AM +0800, Chen-Yu Tsai wrote:
> The module 0 style clocks, or storage module clocks as named in the
> official SDK, are almost the same as the module 0 clocks on earlier
> Allwinner SoCs. The only difference is wider mux register bits.
> 
> As with earlier Allwinner SoCs, mmc module clocks are a special case
> of mod0 clocks, with phase controls for 2 child clocks, output and
> sample.
> 
> This patch adds support for both.
> 
> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> ---
>  Documentation/devicetree/bindings/clock/sunxi.txt |  7 +++--
>  drivers/clk/sunxi/clk-mod0.c                      | 32 +++++++++++++++++++++++
>  2 files changed, 37 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
> index e4c42276c577..0dfd018ba47b 100644
> --- a/Documentation/devicetree/bindings/clock/sunxi.txt
> +++ b/Documentation/devicetree/bindings/clock/sunxi.txt
> @@ -56,7 +56,9 @@ Required properties:
>  	"allwinner,sun8i-a23-apb2-gates-clk" - for the APB2 gates on A23
>  	"allwinner,sun5i-a13-mbus-clk" - for the MBUS clock on A13
>  	"allwinner,sun4i-a10-mmc-clk" - for the MMC clock
> +	"allwinner,sun9i-a80-mmc-clk" - for mmc module clocks on A80
>  	"allwinner,sun4i-a10-mod0-clk" - for the module 0 family of clocks
> +	"allwinner,sun9i-a80-mod0-clk" - for module 0 (storage) clocks on A80
>  	"allwinner,sun8i-a23-mbus-clk" - for the MBUS clock on A23
>  	"allwinner,sun7i-a20-out-clk" - for the external output clocks
>  	"allwinner,sun7i-a20-gmac-clk" - for the GMAC clock module on A20/A31
> @@ -72,7 +74,8 @@ Required properties for all clocks:
>  - #clock-cells : from common clock binding; shall be set to 0 except for
>  	the following compatibles where it shall be set to 1:
>  	"allwinner,*-gates-clk", "allwinner,sun4i-pll5-clk",
> -	"allwinner,sun4i-pll6-clk", "allwinner,sun6i-a31-pll6-clk"
> +	"allwinner,sun4i-pll6-clk", "allwinner,sun6i-a31-pll6-clk",
> +	"allwinner,*-usb-clk", "allwinner,*-mmc-clk"
>  - clock-output-names : shall be the corresponding names of the outputs.
>  	If the clock module only has one output, the name shall be the
>  	module name.
> @@ -94,7 +97,7 @@ For "allwinner,sun6i-a31-pll6-clk", there are 2 outputs. The first output
>  is the normal PLL6 output, or "pll6". The second output is rate doubled
>  PLL6, or "pll6x2".
>  
> -The "allwinner,sun4i-a10-mmc-clk" has three different outputs: the
> +The "allwinner,*-mmc-clk" clocks have three different outputs: the
>  main clock, with the ID 0, and the output and sample clocks, with the
>  IDs 1 and 2, respectively.
>  
> diff --git a/drivers/clk/sunxi/clk-mod0.c b/drivers/clk/sunxi/clk-mod0.c
> index 4430d1398ce6..99ff2c7cccf7 100644
> --- a/drivers/clk/sunxi/clk-mod0.c
> +++ b/drivers/clk/sunxi/clk-mod0.c
> @@ -130,6 +130,30 @@ static struct platform_driver sun4i_a10_mod0_clk_driver = {
>  };
>  module_platform_driver(sun4i_a10_mod0_clk_driver);
>  
> +static const struct factors_data sun9i_a80_mod0_data __initconst = {
> +	.enable = 31,
> +	.mux = 24,
> +	.muxmask = BIT(3) | BIT(2) | BIT(1) | BIT(0),
> +	.table = &sun4i_a10_mod0_config,
> +	.getter = sun4i_a10_get_mod0_factors,
> +};
> +
> +static void __init sun9i_a80_mod0_setup(struct device_node *node)
> +{
> +	void __iomem *reg;
> +
> +	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
> +	if (!reg) {

of_io_request_and_map returns an error pointer.

Looks good otherwise.

Thanks!
Maxime

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