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clk: meson-gxbb: Add MALI clocks 

The Mali is clocked by two identical clock paths behind a glitch free mux
to safely change frequency while running.

The two "mali_0" and "mali_1" clocks are composed of a mux, divider and gate.
Expose these two clocks trees using generic clocks.
Finally the glitch free mux is added as "mali" clock.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1490177935-9646-3-git-send-email-narmstrong@baylibre.com
This commit is contained in:
Neil Armstrong 2017-03-22 11:18:54 +01:00 committed by Kevin Hilman
parent b68fb7871e
commit fac9a55b66
1 changed files with 139 additions and 0 deletions
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139
drivers/clk/meson/gxbb.c
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@ -634,6 +634,131 @@ static struct clk_gate gxbb_sar_adc_clk = {
},
};
/*
* The MALI IP is clocked by two identical clocks (mali_0 and mali_1)
* muxed by a glitch-free switch.
*/
static u32 mux_table_mali_0_1[] = {0, 1, 2, 3, 4, 5, 6, 7};
static const char *gxbb_mali_0_1_parent_names[] = {
"xtal", "gp0_pll", "mpll2", "mpll1", "fclk_div7",
"fclk_div4", "fclk_div3", "fclk_div5"
};
static struct clk_mux gxbb_mali_0_sel = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.mask = 0x7,
.shift = 9,
.table = mux_table_mali_0_1,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali_0_sel",
.ops = &clk_mux_ops,
/*
* bits 10:9 selects from 8 possible parents:
* xtal, gp0_pll, mpll2, mpll1, fclk_div7,
* fclk_div4, fclk_div3, fclk_div5
*/
.parent_names = gxbb_mali_0_1_parent_names,
.num_parents = 8,
.flags = CLK_SET_RATE_NO_REPARENT,
},
};
static struct clk_divider gxbb_mali_0_div = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.shift = 0,
.width = 7,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali_0_div",
.ops = &clk_divider_ops,
.parent_names = (const char *[]){ "mali_0_sel" },
.num_parents = 1,
.flags = CLK_SET_RATE_NO_REPARENT,
},
};
static struct clk_gate gxbb_mali_0 = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.bit_idx = 8,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali_0",
.ops = &clk_gate_ops,
.parent_names = (const char *[]){ "mali_0_div" },
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
},
};
static struct clk_mux gxbb_mali_1_sel = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.mask = 0x7,
.shift = 25,
.table = mux_table_mali_0_1,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali_1_sel",
.ops = &clk_mux_ops,
/*
* bits 10:9 selects from 8 possible parents:
* xtal, gp0_pll, mpll2, mpll1, fclk_div7,
* fclk_div4, fclk_div3, fclk_div5
*/
.parent_names = gxbb_mali_0_1_parent_names,
.num_parents = 8,
.flags = CLK_SET_RATE_NO_REPARENT,
},
};
static struct clk_divider gxbb_mali_1_div = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.shift = 16,
.width = 7,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali_1_div",
.ops = &clk_divider_ops,
.parent_names = (const char *[]){ "mali_1_sel" },
.num_parents = 1,
.flags = CLK_SET_RATE_NO_REPARENT,
},
};
static struct clk_gate gxbb_mali_1 = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.bit_idx = 24,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali_1",
.ops = &clk_gate_ops,
.parent_names = (const char *[]){ "mali_1_div" },
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
},
};
static u32 mux_table_mali[] = {0, 1};
static const char *gxbb_mali_parent_names[] = {
"mali_0", "mali_1"
};
static struct clk_mux gxbb_mali = {
.reg = (void *)HHI_MALI_CLK_CNTL,
.mask = 1,
.shift = 31,
.table = mux_table_mali,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "mali",
.ops = &clk_mux_ops,
.parent_names = gxbb_mali_parent_names,
.num_parents = 2,
.flags = CLK_SET_RATE_NO_REPARENT,
},
};
/* Everything Else (EE) domain gates */
static MESON_GATE(gxbb_ddr, HHI_GCLK_MPEG0, 0);
static MESON_GATE(gxbb_dos, HHI_GCLK_MPEG0, 1);
@ -827,6 +952,13 @@ static struct clk_hw_onecell_data gxbb_hw_onecell_data = {
[CLKID_SAR_ADC_CLK] = &gxbb_sar_adc_clk.hw,
[CLKID_SAR_ADC_SEL] = &gxbb_sar_adc_clk_sel.hw,
[CLKID_SAR_ADC_DIV] = &gxbb_sar_adc_clk_div.hw,
[CLKID_MALI_0_SEL] = &gxbb_mali_0_sel.hw,
[CLKID_MALI_0_DIV] = &gxbb_mali_0_div.hw,
[CLKID_MALI_0] = &gxbb_mali_0.hw,
[CLKID_MALI_1_SEL] = &gxbb_mali_1_sel.hw,
[CLKID_MALI_1_DIV] = &gxbb_mali_1_div.hw,
[CLKID_MALI_1] = &gxbb_mali_1.hw,
[CLKID_MALI] = &gxbb_mali.hw,
},
.num = NR_CLKS,
};
@ -930,16 +1062,23 @@ static struct clk_gate *const gxbb_clk_gates[] = {
&gxbb_emmc_b,
&gxbb_emmc_c,
&gxbb_sar_adc_clk,
&gxbb_mali_0,
&gxbb_mali_1,
};
static struct clk_mux *const gxbb_clk_muxes[] = {
&gxbb_mpeg_clk_sel,
&gxbb_sar_adc_clk_sel,
&gxbb_mali_0_sel,
&gxbb_mali_1_sel,
&gxbb_mali,
};
static struct clk_divider *const gxbb_clk_dividers[] = {
&gxbb_mpeg_clk_div,
&gxbb_sar_adc_clk_div,
&gxbb_mali_0_div,
&gxbb_mali_1_div,
};
static int gxbb_clkc_probe(struct platform_device *pdev)