mirror of
https://github.com/Ysurac/openmptcprouter.git
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74 lines
2.4 KiB
Diff
74 lines
2.4 KiB
Diff
From b8eb1081d267708ba976525a1fe2162901b34f3a Mon Sep 17 00:00:00 2001
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From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Date: Fri, 20 Jan 2023 10:20:37 +0100
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Subject: [PATCH] clk: mediatek: clk-mtk: Add dummy clock ops
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In order to migrate some (few) old clock drivers to the common
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mtk_clk_simple_probe() function, add dummy clock ops to be able
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to insert a dummy clock with ID 0 at the beginning of the list.
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Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Reviewed-by: Miles Chen <miles.chen@mediatek.com>
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Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
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Tested-by: Miles Chen <miles.chen@mediatek.com>
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Link: https://lore.kernel.org/r/20230120092053.182923-8-angelogioacchino.delregno@collabora.com
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Tested-by: Mingming Su <mingming.su@mediatek.com>
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Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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---
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drivers/clk/mediatek/clk-mtk.c | 16 ++++++++++++++++
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drivers/clk/mediatek/clk-mtk.h | 19 +++++++++++++++++++
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2 files changed, 35 insertions(+)
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--- a/drivers/clk/mediatek/clk-mtk.c
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+++ b/drivers/clk/mediatek/clk-mtk.c
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@@ -18,6 +18,22 @@
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#include "clk-mtk.h"
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#include "clk-gate.h"
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+const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
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+EXPORT_SYMBOL_GPL(cg_regs_dummy);
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+
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+static int mtk_clk_dummy_enable(struct clk_hw *hw)
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+{
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+ return 0;
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+}
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+
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+static void mtk_clk_dummy_disable(struct clk_hw *hw) { }
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+
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+const struct clk_ops mtk_clk_dummy_ops = {
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+ .enable = mtk_clk_dummy_enable,
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+ .disable = mtk_clk_dummy_disable,
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+};
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+EXPORT_SYMBOL_GPL(mtk_clk_dummy_ops);
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+
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static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
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unsigned int clk_num)
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{
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--- a/drivers/clk/mediatek/clk-mtk.h
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+++ b/drivers/clk/mediatek/clk-mtk.h
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@@ -22,6 +22,25 @@
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struct platform_device;
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+/*
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+ * We need the clock IDs to start from zero but to maintain devicetree
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+ * backwards compatibility we can't change bindings to start from zero.
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+ * Only a few platforms are affected, so we solve issues given by the
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+ * commonized MTK clocks probe function(s) by adding a dummy clock at
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+ * the beginning where needed.
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+ */
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+#define CLK_DUMMY 0
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+
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+extern const struct clk_ops mtk_clk_dummy_ops;
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+extern const struct mtk_gate_regs cg_regs_dummy;
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+
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+#define GATE_DUMMY(_id, _name) { \
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+ .id = _id, \
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+ .name = _name, \
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+ .regs = &cg_regs_dummy, \
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+ .ops = &mtk_clk_dummy_ops, \
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+ }
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+
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struct mtk_fixed_clk {
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int id;
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const char *name;
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