[PATCH v8 08/12] clk: meson: g12a: make VCLK2 and ENCL clock path configurable by CCF

Neil Armstrong
2023-11-09T09:00:27Z

In order to setup the DSI clock, let's make the unused VCLK2 clock path
configuration via CCF.

The nocache option is removed from following clocks:
- vclk2_sel
- vclk2_input
- vclk2_div
- vclk2
- vclk_div1
- vclk2_div2_en
- vclk2_div4_en
- vclk2_div6_en
- vclk2_div12_en
- vclk2_div2
- vclk2_div4
- vclk2_div6
- vclk2_div12
- cts_encl_sel

vclk2 and vclk2_div uses the newly introduced vclk regmap driver
to handle the enable and reset bits.

In order to set a rate on cts_encl via the vclk2 clock path,
the NO_REPARENT flag is set on cts_encl_sel & vclk2_sel in order
to keep CCF from selection a parent.
The parents of cts_encl_sel & vclk2_sel are expected to be defined
in DT.

The following clock scheme is to be used for DSI:

xtal
\_ gp0_pll_dco
\_ gp0_pll
|- vclk2_sel
| \_ vclk2_input
| \_ vclk2_div
| \_ vclk2
| \_ vclk2_div1
| \_ cts_encl_sel
| \_ cts_encl -> to VPU LCD Encoder
|- mipi_dsi_pxclk_sel
\_ mipi_dsi_pxclk_div
\_ mipi_dsi_pxclk -> to DSI controller

The mipi_dsi_pxclk_div is set as RO in order to use the same GP0
for mipi_dsi_pxclk and vclk2_input.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
drivers/clk/meson/g12a.c | 68 +++++++++++++++++++++++++++++++++---------------
1 file changed, 47 insertions(+), 21 deletions(-)

diff --git a/drivers/clk/meson/g12a.c b/drivers/clk/meson/g12a.c
index cadd824336ad..fb3d9196a1fd 100644
--- a/drivers/clk/meson/g12a.c
+++ b/drivers/clk/meson/g12a.c
@@ -22,6 +22,7 @@
#include "clk-regmap.h"
#include "clk-cpu-dyndiv.h"
#include "vid-pll-div.h"
+#include "vclk.h"
#include "meson-eeclk.h"
#include "g12a.h"

@@ -3165,7 +3166,7 @@ static struct clk_regmap g12a_vclk2_sel = {
.ops = &clk_regmap_mux_ops,
.parent_hws = g12a_vclk_parent_hws,
.num_parents = ARRAY_SIZE(g12a_vclk_parent_hws),
- .flags = CLK_SET_RATE_NO_REPARENT | CLK_GET_RATE_NOCACHE,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
},
};

@@ -3193,7 +3194,7 @@ static struct clk_regmap g12a_vclk2_input = {
.ops = &clk_regmap_gate_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2_sel.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3215,19 +3216,32 @@ static struct clk_regmap g12a_vclk_div = {
};

static struct clk_regmap g12a_vclk2_div = {
- .data = &(struct clk_regmap_div_data){
- .offset = HHI_VIID_CLK_DIV,
- .shift = 0,
- .width = 8,
+ .data = &(struct clk_regmap_vclk_div_data){
+ .div = {
+ .reg_off = HHI_VIID_CLK_DIV,
+ .shift = 0,
+ .width = 8,
+ },
+ .enable = {
+ .reg_off = HHI_VIID_CLK_DIV,
+ .shift = 16,
+ .width = 1,
+ },
+ .reset = {
+ .reg_off = HHI_VIID_CLK_DIV,
+ .shift = 17,
+ .width = 1,
+ },
+ .flags = CLK_DIVIDER_ROUND_CLOSEST,
},
.hw.init = &(struct clk_init_data){
.name = "vclk2_div",
- .ops = &clk_regmap_divider_ops,
+ .ops = &clk_regmap_vclk_div_ops,
.parent_hws = (const struct clk_hw *[]) {
&g12a_vclk2_input.hw
},
.num_parents = 1,
- .flags = CLK_GET_RATE_NOCACHE,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE,
},
};

@@ -3246,16 +3260,24 @@ static struct clk_regmap g12a_vclk = {
};

static struct clk_regmap g12a_vclk2 = {
- .data = &(struct clk_regmap_gate_data){
- .offset = HHI_VIID_CLK_CNTL,
- .bit_idx = 19,
+ .data = &(struct clk_regmap_vclk_data){
+ .enable = {
+ .reg_off = HHI_VIID_CLK_CNTL,
+ .shift = 19,
+ .width = 1,
+ },
+ .reset = {
+ .reg_off = HHI_VIID_CLK_CNTL,
+ .shift = 15,
+ .width = 1,
+ },
},
.hw.init = &(struct clk_init_data) {
.name = "vclk2",
- .ops = &clk_regmap_gate_ops,
+ .ops = &clk_regmap_vclk_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2_div.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE,
},
};

@@ -3339,7 +3361,7 @@ static struct clk_regmap g12a_vclk2_div1 = {
.ops = &clk_regmap_gate_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3353,7 +3375,7 @@ static struct clk_regmap g12a_vclk2_div2_en = {
.ops = &clk_regmap_gate_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3367,7 +3389,7 @@ static struct clk_regmap g12a_vclk2_div4_en = {
.ops = &clk_regmap_gate_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3381,7 +3403,7 @@ static struct clk_regmap g12a_vclk2_div6_en = {
.ops = &clk_regmap_gate_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3395,7 +3417,7 @@ static struct clk_regmap g12a_vclk2_div12_en = {
.ops = &clk_regmap_gate_ops,
.parent_hws = (const struct clk_hw *[]) { &g12a_vclk2.hw },
.num_parents = 1,
- .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3461,6 +3483,7 @@ static struct clk_fixed_factor g12a_vclk2_div2 = {
&g12a_vclk2_div2_en.hw
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3474,6 +3497,7 @@ static struct clk_fixed_factor g12a_vclk2_div4 = {
&g12a_vclk2_div4_en.hw
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3487,6 +3511,7 @@ static struct clk_fixed_factor g12a_vclk2_div6 = {
&g12a_vclk2_div6_en.hw
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3500,6 +3525,7 @@ static struct clk_fixed_factor g12a_vclk2_div12 = {
&g12a_vclk2_div12_en.hw
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
},
};

@@ -3561,7 +3587,7 @@ static struct clk_regmap g12a_cts_encl_sel = {
.ops = &clk_regmap_mux_ops,
.parent_hws = g12a_cts_parent_hws,
.num_parents = ARRAY_SIZE(g12a_cts_parent_hws),
- .flags = CLK_SET_RATE_NO_REPARENT | CLK_GET_RATE_NOCACHE,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
},
};

@@ -3717,7 +3743,7 @@ static struct clk_regmap g12a_mipi_dsi_pxclk_sel = {
.ops = &clk_regmap_mux_ops,
.parent_hws = g12a_mipi_dsi_pxclk_parent_hws,
.num_parents = ARRAY_SIZE(g12a_mipi_dsi_pxclk_parent_hws),
- .flags = CLK_SET_RATE_NO_REPARENT,
+ .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
},
};

@@ -3729,7 +3755,7 @@ static struct clk_regmap g12a_mipi_dsi_pxclk_div = {
},
.hw.init = &(struct clk_init_data){
.name = "mipi_dsi_pxclk_div",
- .ops = &clk_regmap_divider_ops,
+ .ops = &clk_regmap_divider_ro_ops,
.parent_hws = (const struct clk_hw *[]) {
&g12a_mipi_dsi_pxclk_sel.hw
},

--
2.34.1