[PATCH v3 07/23] clk: mediatek: clk-mtk: Add dummy clock ops
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Date: 2023-01-13 11:14:05
Also in:
linux-clk, linux-devicetree, linux-mediatek, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
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: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Miles Chen <redacted> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> --- drivers/clk/mediatek/clk-mtk.c | 15 +++++++++++++++ drivers/clk/mediatek/clk-mtk.h | 19 +++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index cf2f465ecf22..7d7a5bfe1214 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c@@ -18,6 +18,21 @@ #include "clk-mtk.h" #include "clk-gate.h" +const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 }; + +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) {
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index cd97d2722380..ed329d8d7349 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h@@ -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;
--
2.39.0
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