diff options
| author | Weijie Gao <weijie.gao@mediatek.com> | 2022-09-09 14:59:59 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-09-23 22:09:16 +0300 |
| commit | 7fb33e9aea514cfd873d8005954108a482e9e693 (patch) | |
| tree | c940be0ad748c90af19c5c75772bc8eaf9d51c0e /drivers/clk | |
| parent | 59acdf8afe4a5c676f8b6ed7af48821980a2bda5 (diff) | |
| download | u-boot-7fb33e9aea514cfd873d8005954108a482e9e693.tar.xz | |
clk: mediatek: add CLK_BYPASS_XTAL flag to allow bypassing searching clock parent of xtal clock
The mtk clock framework in u-boot uses array index for searching clock
parent (kernel uses strings for search), so we need to specify a special
clock with ID=0 for CLK_XTAL in u-boot.
In the mt7622/mt7629 clock tree, the clocks with ID=0 never call
mtk_topckgen_get_mux_rate, adn return xtal clock directly. This what we
expected.
However for newer chips, they may have some clocks with ID=0 not
representing the xtal clock and still needs mtk_topckgen_get_mux_rate be
called. Current logic will make entire clock driver not working.
This patch adds a flag to indicate that whether a clock driver needs clocks
with ID=0 to call mtk_topckgen_get_mux_rate.
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/mediatek/clk-mtk.c | 4 | ||||
| -rw-r--r-- | drivers/clk/mediatek/clk-mtk.h | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c index d43b8a0648..7d145f4975 100644 --- a/drivers/clk/mediatek/clk-mtk.c +++ b/drivers/clk/mediatek/clk-mtk.c @@ -319,7 +319,9 @@ static ulong mtk_topckgen_get_mux_rate(struct clk *clk, u32 off) index &= mux->mux_mask << mux->mux_shift; index = index >> mux->mux_shift; - if (mux->parent[index]) + if (mux->parent[index] > 0 || + (mux->parent[index] == CLK_XTAL && + priv->tree->flags & CLK_BYPASS_XTAL)) return mtk_clk_find_parent_rate(clk, mux->parent[index], NULL); diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h index 95a23d14a8..e0c5550c80 100644 --- a/drivers/clk/mediatek/clk-mtk.h +++ b/drivers/clk/mediatek/clk-mtk.h @@ -11,6 +11,11 @@ #define CLK_XTAL 0 #define MHZ (1000 * 1000) +/* flags in struct mtk_clk_tree */ + +/* clk id == 0 doesn't mean it's xtal clk */ +#define CLK_BYPASS_XTAL BIT(0) + #define HAVE_RST_BAR BIT(0) #define CLK_DOMAIN_SCPSYS BIT(0) #define CLK_MUX_SETCLR_UPD BIT(1) @@ -197,6 +202,7 @@ struct mtk_clk_tree { const struct mtk_fixed_clk *fclks; const struct mtk_fixed_factor *fdivs; const struct mtk_composite *muxes; + u32 flags; }; struct mtk_clk_priv { |