a5f7bf5458
The MFG_BG3D is a gate to enable/disable clock output to the GPU,
but the actual output is decided by multiple muxes; in particular:
mfg_ck_fast_ref muxes between "slow" (top_mfg_core_tmp) and
"fast" (MFGPLL) clock, while top_mfg_core_tmp muxes between the
26MHz clock and various system PLLs.
The clock gate comes after all the muxes, so its parent is
mfg_ck_fast_reg, not top_mfg_core_tmp.
Reparent MFG_BG3D to the latter to match the hardware and add the
CLK_SET_RATE_PARENT flag to it: this way we ensure propagating
rate changes that are requested on MFG_BG3D along its entire clock
tree.
Fixes: 35016f10c0e5 ("clk: mediatek: Add MT8195 mfgcfg clock support")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220927101128.44758-6-angelogioacchino.delregno@collabora.com
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// Copyright (c) 2021 MediaTek Inc.
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// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
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#include "clk-gate.h"
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#include "clk-mtk.h"
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#include <dt-bindings/clock/mt8195-clk.h>
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#include <linux/clk-provider.h>
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#include <linux/platform_device.h>
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static const struct mtk_gate_regs mfg_cg_regs = {
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.set_ofs = 0x4,
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.clr_ofs = 0x8,
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.sta_ofs = 0x0,
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};
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#define GATE_MFG(_id, _name, _parent, _shift) \
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GATE_MTK_FLAGS(_id, _name, _parent, &mfg_cg_regs, \
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_shift, &mtk_clk_gate_ops_setclr, \
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CLK_SET_RATE_PARENT)
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static const struct mtk_gate mfg_clks[] = {
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GATE_MFG(CLK_MFG_BG3D, "mfg_bg3d", "mfg_ck_fast_ref", 0),
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};
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static const struct mtk_clk_desc mfg_desc = {
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.clks = mfg_clks,
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.num_clks = ARRAY_SIZE(mfg_clks),
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};
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static const struct of_device_id of_match_clk_mt8195_mfg[] = {
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{
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.compatible = "mediatek,mt8195-mfgcfg",
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.data = &mfg_desc,
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}, {
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/* sentinel */
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}
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};
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static struct platform_driver clk_mt8195_mfg_drv = {
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.probe = mtk_clk_simple_probe,
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.remove = mtk_clk_simple_remove,
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.driver = {
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.name = "clk-mt8195-mfg",
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.of_match_table = of_match_clk_mt8195_mfg,
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},
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};
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builtin_platform_driver(clk_mt8195_mfg_drv);
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