diff options
Diffstat (limited to 'drivers/clk/mvebu/armada-37xx-periph.c')
| -rw-r--r-- | drivers/clk/mvebu/armada-37xx-periph.c | 82 |
1 files changed, 73 insertions, 9 deletions
diff --git a/drivers/clk/mvebu/armada-37xx-periph.c b/drivers/clk/mvebu/armada-37xx-periph.c index 6dae21ced18a..ef725ec73c93 100644 --- a/drivers/clk/mvebu/armada-37xx-periph.c +++ b/drivers/clk/mvebu/armada-37xx-periph.c @@ -46,7 +46,17 @@ struct clk_double_div { u8 shift2; }; +struct clk_pm_cpu { + struct clk_hw hw; + void __iomem *reg_mux; + u8 shift_mux; + u32 mask_mux; + void __iomem *reg_div; + u8 shift_div; +}; + #define to_clk_double_div(_hw) container_of(_hw, struct clk_double_div, hw) +#define to_clk_pm_cpu(_hw) container_of(_hw, struct clk_pm_cpu, hw) struct clk_periph_data { const char *name; @@ -55,6 +65,7 @@ struct clk_periph_data { struct clk_hw *mux_hw; struct clk_hw *rate_hw; struct clk_hw *gate_hw; + struct clk_hw *muxrate_hw; bool is_double_div; }; @@ -81,6 +92,7 @@ static const struct clk_div_table clk_table2[] = { }; static const struct clk_ops clk_double_div_ops; +static const struct clk_ops clk_pm_cpu_ops; #define PERIPH_GATE(_name, _bit) \ struct clk_gate gate_##_name = { \ @@ -122,6 +134,18 @@ struct clk_divider rate_##_name = { \ } \ }; +#define PERIPH_PM_CPU(_name, _shift1, _reg, _shift2) \ +struct clk_pm_cpu muxrate_##_name = { \ + .reg_mux = (void *)TBG_SEL, \ + .mask_mux = 3, \ + .shift_mux = _shift1, \ + .reg_div = (void *)_reg, \ + .shift_div = _shift2, \ + .hw.init = &(struct clk_init_data){ \ + .ops = &clk_pm_cpu_ops, \ + } \ +}; + #define PERIPH_CLK_FULL_DD(_name, _bit, _shift, _reg1, _reg2, _shift1, _shift2)\ static PERIPH_GATE(_name, _bit); \ static PERIPH_MUX(_name, _shift); \ @@ -136,10 +160,6 @@ static PERIPH_DIV(_name, _reg, _shift1, _table); static PERIPH_GATE(_name, _bit); \ static PERIPH_DIV(_name, _reg, _shift, _table); -#define PERIPH_CLK_MUX_DIV(_name, _shift, _reg, _shift_div, _table) \ -static PERIPH_MUX(_name, _shift); \ -static PERIPH_DIV(_name, _reg, _shift_div, _table); - #define PERIPH_CLK_MUX_DD(_name, _shift, _reg1, _reg2, _shift1, _shift2)\ static PERIPH_MUX(_name, _shift); \ static PERIPH_DOUBLEDIV(_name, _reg1, _reg2, _shift1, _shift2); @@ -180,13 +200,12 @@ static PERIPH_DOUBLEDIV(_name, _reg1, _reg2, _shift1, _shift2); .rate_hw = &rate_##_name.hw, \ } -#define REF_CLK_MUX_DIV(_name) \ +#define REF_CLK_PM_CPU(_name) \ { .name = #_name, \ .parent_names = (const char *[]){ "TBG-A-P", \ "TBG-B-P", "TBG-A-S", "TBG-B-S"}, \ .num_parents = 4, \ - .mux_hw = &mux_##_name.hw, \ - .rate_hw = &rate_##_name.hw, \ + .muxrate_hw = &muxrate_##_name.hw, \ } #define REF_CLK_MUX_DD(_name) \ @@ -216,7 +235,7 @@ PERIPH_CLK_FULL_DD(ddr_fclk, 21, 16, DIV_SEL0, DIV_SEL0, 15, 12); PERIPH_CLK_FULL(trace, 22, 18, DIV_SEL0, 20, clk_table6); PERIPH_CLK_FULL(counter, 23, 20, DIV_SEL0, 23, clk_table6); PERIPH_CLK_FULL_DD(eip97, 24, 24, DIV_SEL2, DIV_SEL2, 22, 19); -PERIPH_CLK_MUX_DIV(cpu, 22, DIV_SEL0, 28, clk_table6); +static PERIPH_PM_CPU(cpu, 22, DIV_SEL0, 28); static struct clk_periph_data data_nb[] = { REF_CLK_FULL_DD(mmc), @@ -235,7 +254,7 @@ static struct clk_periph_data data_nb[] = { REF_CLK_FULL(trace), REF_CLK_FULL(counter), REF_CLK_FULL_DD(eip97), - REF_CLK_MUX_DIV(cpu), + REF_CLK_PM_CPU(cpu), { }, }; @@ -297,6 +316,37 @@ static const struct clk_ops clk_double_div_ops = { .recalc_rate = clk_double_div_recalc_rate, }; +static u8 clk_pm_cpu_get_parent(struct clk_hw *hw) +{ + struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw); + int num_parents = clk_hw_get_num_parents(hw); + u32 val; + + val = readl(pm_cpu->reg_mux) >> pm_cpu->shift_mux; + val &= pm_cpu->mask_mux; + + if (val >= num_parents) + return -EINVAL; + + return val; +} + +static unsigned long clk_pm_cpu_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_pm_cpu *pm_cpu = to_clk_pm_cpu(hw); + unsigned int div; + + div = get_div(pm_cpu->reg_div, pm_cpu->shift_div); + + return DIV_ROUND_UP_ULL((u64)parent_rate, div); +} + +static const struct clk_ops clk_pm_cpu_ops = { + .get_parent = clk_pm_cpu_get_parent, + .recalc_rate = clk_pm_cpu_recalc_rate, +}; + static const struct of_device_id armada_3700_periph_clock_of_match[] = { { .compatible = "marvell,armada-3700-periph-clock-nb", .data = data_nb, }, @@ -356,6 +406,20 @@ static int armada_3700_add_composite_clk(const struct clk_periph_data *data, } } + if (data->muxrate_hw) { + struct clk_pm_cpu *pmcpu_clk; + struct clk_hw *muxrate_hw = data->muxrate_hw; + + pmcpu_clk = to_clk_pm_cpu(muxrate_hw); + pmcpu_clk->reg_mux = reg + (u64)pmcpu_clk->reg_mux; + pmcpu_clk->reg_div = reg + (u64)pmcpu_clk->reg_div; + + mux_hw = muxrate_hw; + rate_hw = muxrate_hw; + mux_ops = muxrate_hw->init->ops; + rate_ops = muxrate_hw->init->ops; + } + *hw = clk_hw_register_composite(dev, data->name, data->parent_names, data->num_parents, mux_hw, mux_ops, rate_hw, rate_ops, |