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.
This also implies that "top_mfg_core_tmp" is a parent of the
"mfg_ck_fast_ref" mux (and not vice-versa), so reparent the
MFG_BG3D gate to the latter 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.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
drivers/clk/mediatek/clk-mt8195-mfg.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/mediatek/clk-mt8195-mfg.c b/drivers/clk/mediatek/clk-mt8195-mfg.c
index 9411c556a5a9..c94cb71bd9b9 100644
--- a/drivers/clk/mediatek/clk-mt8195-mfg.c
+++ b/drivers/clk/mediatek/clk-mt8195-mfg.c
@@ -17,10 +17,12 @@ static const struct mtk_gate_regs mfg_cg_regs = {
};
#define GATE_MFG(_id, _name, _parent, _shift) \
- GATE_MTK(_id, _name, _parent, &mfg_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
+ GATE_MTK_FLAGS(_id, _name, _parent, &mfg_cg_regs, \
+ _shift, &mtk_clk_gate_ops_setclr, \
+ CLK_SET_RATE_PARENT)
static const struct mtk_gate mfg_clks[] = {
- GATE_MFG(CLK_MFG_BG3D, "mfg_bg3d", "top_mfg_core_tmp", 0),
+ GATE_MFG(CLK_MFG_BG3D, "mfg_bg3d", "mfg_ck_fast_ref", 0),
};
static const struct mtk_clk_desc mfg_desc = {
--
2.37.2
