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Commit 5ed400dd authored by Jean-Francois Moine's avatar Jean-Francois Moine Committed by Maxime Ripard
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clk: sunxi: Add sun6i/8i display support 



Add the clock type which is used by the sun6i/8i families for video display.

Signed-off-by: default avatarJean-Francois Moine <moinejf@free.fr>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
parent 8f076761

Documentation/devicetree/bindings/clock/sunxi.txt

+1 −0
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ Required properties: 
	"allwinner,sun9i-a80-usb-mod-clk" - for usb gates + resets on A80

	"allwinner,sun9i-a80-usb-phy-clk" - for usb phy gates + resets on A80

	"allwinner,sun4i-a10-ve-clk" - for the Video Engine clock

	"allwinner,sun6i-a31-display-clk" - for the display clocks



Required properties for all clocks:

- reg : shall be the control register address for the clock.

drivers/clk/sunxi/clk-sunxi.c

+38 −0
Original line number Diff line number Diff line
@@ -1127,3 +1127,41 @@ static void __init sun6i_pll6_clk_setup(struct device_node *node) 
}

CLK_OF_DECLARE(sun6i_pll6, "allwinner,sun6i-a31-pll6-clk",

	       sun6i_pll6_clk_setup);



/*

 * sun6i display

 *

 * rate = parent_rate / (m + 1);

 */

static void sun6i_display_factors(struct factors_request *req)

{

	u8 m;



	if (req->rate > req->parent_rate)

		req->rate = req->parent_rate;



	m = DIV_ROUND_UP(req->parent_rate, req->rate);



	req->rate = req->parent_rate / m;

	req->m = m - 1;

}



static const struct clk_factors_config sun6i_display_config = {

	.mshift = 0,

	.mwidth = 4,

};



static const struct factors_data sun6i_display_data __initconst = {

	.enable = 31,

	.mux = 24,

	.muxmask = BIT(2) | BIT(1) | BIT(0),

	.table = &sun6i_display_config,

	.getter = sun6i_display_factors,

};



static void __init sun6i_display_setup(struct device_node *node)

{

	sunxi_factors_clk_setup(node, &sun6i_display_data);

}

CLK_OF_DECLARE(sun6i_display, "allwinner,sun6i-a31-display-clk",

	       sun6i_display_setup);