Commit b8eb1081 authored by AngeloGioacchino Del Regno's avatar AngeloGioacchino Del Regno Committed by Stephen Boyd
Browse files

clk: mediatek: clk-mtk: Add dummy clock ops 



In order to migrate some (few) old clock drivers to the common
mtk_clk_simple_probe() function, add dummy clock ops to be able
to insert a dummy clock with ID 0 at the beginning of the list.

Signed-off-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: default avatarMiles Chen <miles.chen@mediatek.com>
Reviewed-by: default avatarChen-Yu Tsai <wenst@chromium.org>
Tested-by: default avatarMiles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20230120092053.182923-8-angelogioacchino.delregno@collabora.com


Tested-by: default avatarMingming Su <mingming.su@mediatek.com>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent d3d6bd5e

drivers/clk/mediatek/clk-mtk.c

+16 −0
Original line number Diff line number Diff line
@@ -18,6 +18,22 @@ 
#include "clk-mtk.h"

#include "clk-gate.h"



const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };

EXPORT_SYMBOL_GPL(cg_regs_dummy);



static int mtk_clk_dummy_enable(struct clk_hw *hw)

{

	return 0;

}



static void mtk_clk_dummy_disable(struct clk_hw *hw) { }



const struct clk_ops mtk_clk_dummy_ops = {

	.enable		= mtk_clk_dummy_enable,

	.disable	= mtk_clk_dummy_disable,

};

EXPORT_SYMBOL_GPL(mtk_clk_dummy_ops);



static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,

			      unsigned int clk_num)

{

drivers/clk/mediatek/clk-mtk.h

+19 −0
Original line number Diff line number Diff line
@@ -22,6 +22,25 @@ 


struct platform_device;



/*

 * We need the clock IDs to start from zero but to maintain devicetree

 * backwards compatibility we can't change bindings to start from zero.

 * Only a few platforms are affected, so we solve issues given by the

 * commonized MTK clocks probe function(s) by adding a dummy clock at

 * the beginning where needed.

 */

#define CLK_DUMMY		0



extern const struct clk_ops mtk_clk_dummy_ops;

extern const struct mtk_gate_regs cg_regs_dummy;



#define GATE_DUMMY(_id, _name) {				\

		.id = _id,					\

		.name = _name,					\

		.regs = &cg_regs_dummy,				\

		.ops = &mtk_clk_dummy_ops,			\

	}



struct mtk_fixed_clk {

	int id;

	const char *name;