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| #include <linux/clk-provider.h> |
| #include <linux/io.h> |
| |
| #include "ccu_gate.h" |
| #include "ccu_div.h" |
| |
| static unsigned long ccu_div_round_rate(struct ccu_mux_internal *mux, |
| <------><------><------><------><------>struct clk_hw *parent, |
| <------><------><------><------><------>unsigned long *parent_rate, |
| <------><------><------><------><------>unsigned long rate, |
| <------><------><------><------><------>void *data) |
| { |
| <------>struct ccu_div *cd = data; |
| |
| <------>if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
| <------><------>rate *= cd->fixed_post_div; |
| |
| <------>rate = divider_round_rate_parent(&cd->common.hw, parent, |
| <------><------><------><------><------> rate, parent_rate, |
| <------><------><------><------><------> cd->div.table, cd->div.width, |
| <------><------><------><------><------> cd->div.flags); |
| |
| <------>if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
| <------><------>rate /= cd->fixed_post_div; |
| |
| <------>return rate; |
| } |
| |
| static void ccu_div_disable(struct clk_hw *hw) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| |
| <------>return ccu_gate_helper_disable(&cd->common, cd->enable); |
| } |
| |
| static int ccu_div_enable(struct clk_hw *hw) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| |
| <------>return ccu_gate_helper_enable(&cd->common, cd->enable); |
| } |
| |
| static int ccu_div_is_enabled(struct clk_hw *hw) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| |
| <------>return ccu_gate_helper_is_enabled(&cd->common, cd->enable); |
| } |
| |
| static unsigned long ccu_div_recalc_rate(struct clk_hw *hw, |
| <------><------><------><------><------>unsigned long parent_rate) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| <------>unsigned long val; |
| <------>u32 reg; |
| |
| <------>reg = readl(cd->common.base + cd->common.reg); |
| <------>val = reg >> cd->div.shift; |
| <------>val &= (1 << cd->div.width) - 1; |
| |
| <------>parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1, |
| <------><------><------><------><------><------> parent_rate); |
| |
| <------>val = divider_recalc_rate(hw, parent_rate, val, cd->div.table, |
| <------><------><------><------> cd->div.flags, cd->div.width); |
| |
| <------>if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
| <------><------>val /= cd->fixed_post_div; |
| |
| <------>return val; |
| } |
| |
| static int ccu_div_determine_rate(struct clk_hw *hw, |
| <------><------><------><------>struct clk_rate_request *req) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| |
| <------>return ccu_mux_helper_determine_rate(&cd->common, &cd->mux, |
| <------><------><------><------><------> req, ccu_div_round_rate, cd); |
| } |
| |
| static int ccu_div_set_rate(struct clk_hw *hw, unsigned long rate, |
| <------><------><------> unsigned long parent_rate) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| <------>unsigned long flags; |
| <------>unsigned long val; |
| <------>u32 reg; |
| |
| <------>parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1, |
| <------><------><------><------><------><------> parent_rate); |
| |
| <------>if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
| <------><------>rate *= cd->fixed_post_div; |
| |
| <------>val = divider_get_val(rate, parent_rate, cd->div.table, cd->div.width, |
| <------><------><------> cd->div.flags); |
| |
| <------>spin_lock_irqsave(cd->common.lock, flags); |
| |
| <------>reg = readl(cd->common.base + cd->common.reg); |
| <------>reg &= ~GENMASK(cd->div.width + cd->div.shift - 1, cd->div.shift); |
| |
| <------>writel(reg | (val << cd->div.shift), |
| <------> cd->common.base + cd->common.reg); |
| |
| <------>spin_unlock_irqrestore(cd->common.lock, flags); |
| |
| <------>return 0; |
| } |
| |
| static u8 ccu_div_get_parent(struct clk_hw *hw) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| |
| <------>return ccu_mux_helper_get_parent(&cd->common, &cd->mux); |
| } |
| |
| static int ccu_div_set_parent(struct clk_hw *hw, u8 index) |
| { |
| <------>struct ccu_div *cd = hw_to_ccu_div(hw); |
| |
| <------>return ccu_mux_helper_set_parent(&cd->common, &cd->mux, index); |
| } |
| |
| const struct clk_ops ccu_div_ops = { |
| <------>.disable = ccu_div_disable, |
| <------>.enable = ccu_div_enable, |
| <------>.is_enabled = ccu_div_is_enabled, |
| |
| <------>.get_parent = ccu_div_get_parent, |
| <------>.set_parent = ccu_div_set_parent, |
| |
| <------>.determine_rate = ccu_div_determine_rate, |
| <------>.recalc_rate = ccu_div_recalc_rate, |
| <------>.set_rate = ccu_div_set_rate, |
| }; |
| |