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clk: mediatek: make dpi0_sel propagate rate changes 

This mux is supposed to select a fitting divider after the PLL
is already set to the correct rate.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Philipp Zabel 2016-01-04 18:36:42 +01:00
parent 9e629c17aa
commit 06445994fe
2 changed files with 18 additions and 3 deletions
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6
drivers/clk/mediatek/clk-mt8173.c
View File

@ -558,7 +558,11 @@ static const struct mtk_composite top_muxes[] __initconst = {
MUX_GATE(CLK_TOP_ATB_SEL, "atb_sel", atb_parents, 0x0090, 16, 2, 23),
MUX_GATE(CLK_TOP_VENC_LT_SEL, "venclt_sel", venc_lt_parents, 0x0090, 24, 4, 31),
/* CLK_CFG_6 */
MUX_GATE(CLK_TOP_DPI0_SEL, "dpi0_sel", dpi0_parents, 0x00a0, 0, 3, 7),
/*
* The dpi0_sel clock should not propagate rate changes to its parent
* clock so the dpi driver can have full control over PLL and divider.
*/
MUX_GATE_FLAGS(CLK_TOP_DPI0_SEL, "dpi0_sel", dpi0_parents, 0x00a0, 0, 3, 7, 0),
MUX_GATE(CLK_TOP_IRDA_SEL, "irda_sel", irda_parents, 0x00a0, 8, 2, 15),
MUX_GATE(CLK_TOP_CCI400_SEL, "cci400_sel", cci400_parents, 0x00a0, 16, 3, 23),
MUX_GATE(CLK_TOP_AUD_1_SEL, "aud_1_sel", aud_1_parents, 0x00a0, 24, 2, 31),

15
drivers/clk/mediatek/clk-mtk.h
View File

@ -83,7 +83,11 @@ struct mtk_composite {
signed char num_parents;
};
#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) { \
/*
* In case the rate change propagation to parent clocks is undesirable,
* this macro allows to specify the clock flags manually.
*/
#define MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, _flags) { \
.id = _id, \
.name = _name, \
.mux_reg = _reg, \
@ -94,9 +98,16 @@ struct mtk_composite {
.divider_shift = -1, \
.parent_names = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
.flags = CLK_SET_RATE_PARENT, \
.flags = _flags, \
}
/*
* Unless necessary, all MUX_GATE clocks propagate rate changes to their
* parent clock by default.
*/
#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) \
MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, CLK_SET_RATE_PARENT)
#define MUX(_id, _name, _parents, _reg, _shift, _width) { \
.id = _id, \
.name = _name, \